SolderKnight

FLYBACK TFB XXX REPLACEMENT GUIDE

2009-09-03T12:30:00.000-07:00

Flyback transformers replacement guide
TFB XXX
Original	Equivalents	Diagram
TFB 104 S	TFB 1045	42088 (NO VIEW)
TFB 1045	TFB 104 S	42088 (NO VIEW)
TFB 125 SE	TFB 140	46068 (NO VIEW)
	TFB 140 B
	TFB 140 C
TFB 140	TFB 125 SE	46068 (NO VIEW)
	TFB 140 B
	TFB 140 C
TFB 140 B	TFB 125 SE	46068 (NO VIEW)
	TFB 140
	TFB 140 C
TFB 140 C	TFB 125 SE	46068 (NO VIEW)
	TFB 140
	TFB 140 B
TFB 142	TFB 142 B	46066 (NO VIEW)
TFB 142	TFB 142 C	46066 (NO VIEW)
TFB 142 B	TFB 142	46066 (NO VIEW)
TFB 142 B	TFB 142 C	46066 (NO VIEW)
TFB 142 C	TFB 142	46066 (NO VIEW)
TFB 142 C	TFB 142 B	46066 (NO VIEW)
TFB 150	TFB 150 A	46047 (NO VIEW)
TFB 150		46047 (NO VIEW)
TFB 150 A	TFB 150	46047 (NO VIEW)
TFB 150 A		46047 (NO VIEW)
TFB 150 B		46016
TFB 150 E		46047
TFB 159 A		6653
TFB 170	TFB 170 A	46012
TFB 170 A	TFB 170	46012
TFB 176 G		46031
TFB 176 H		46064
TFB 185 A		46032
TFB 185 C		46013
TFB 195 A		46042
TFB 200	TFB 200 A	VIEW
	TFB 200 B
	TFB 200 C
	TFB 200 D
TFB 200 A	TFB 200	VIEW
	TFB 200 B
	TFB 200 C
	TFB 200 D
TFB 200 B	TFB 200	VIEW
	TFB 200 A
	TFB 200 C
	TFB 200 D
TFB 200 C	TFB 200	VIEW
	TFB 200 A
	TFB 200 B
	TFB 200 D
TFB 200 D	TFB 200	VIEW
	TFB 200 A
	TFB 200 B
	TFB 200 C
TFB 218 C		46242
TFB 235		42043
TFB 275	TFB 275 J	VIEW
	TFB 275 L
	TFB 275 T
TFB 275 J	TFB 275	VIEW
	TFB 275 L
	TFB 275 T
TFB 275 L	TFB 275	VIEW
	TFB 275 J
	TFB 275 T
TFB 275 T	TFB 275	VIEW
	TFB 275 J
	TFB 275 L

.KRABITTV REPAIR

SIMPLE CRYSTAL TESTER

2009-08-31T10:37:00.000-07:00

It's a simple X-tal tester from roinson blog

just visit for more

I2C PROGRAMMER

2009-08-21T11:21:00.000-07:00

Sometimes you just need to program I2C EEPROM chips and don want to invest any bucks to it, then you should consider I2C EPROM programmer from http://www.lancos.com site originally designed by Claudio Lanconelli. This is very easy to build and use circuit but it supports 24C01, 24C02, 24C04, 24C08, 24C16 24C32, 24C64, 24C65, 24C128, 24C256, 24C512 IÂ²C Bus EEPROM, auto detects 24XX EEPROM capacity

For I2C EPROM programmer you need to download PonyProg programeer software from www.lancos.com .Choose “Easy I2CBus” from the Options – Setup menu and the parallel checkbox on WindowsNT/2000 you have to select “AVR ISP I/O”.

from:www.scienceprog.com

FLYBACK TESTER by BOB PARKER

2009-03-29T09:49:00.000-07:00

In-circuit LOPT/FBT
Tester
K 7205
Cat No.
by Bob Parker

Here’s the design for a low cost, easy to build and use battery operated ‘shorted turns’ tester for
line-output or ‘flyback’ transformers, and other HF wound components like deflection yoke windings
and SMPS transformers. Tests have shown it capable of finding at least 80% of LOPT/FBT
faults, so it can save a lot of time and trouble. Small and rugged, it’s well worth a place in the toolkit
of anyone involved in servicing TV receivers, video monitors and computer power supplies.

YOU CAN VIEW AT HERE

How to Build a Serial Port Infrared Receiver

2009-03-10T10:59:00.000-07:00

This comprehensive guide allows you to control your computer with a simple remote, like the one you already use for your TV-set. It’s very useful when you want to control a DVD or an mp3 player remotely. If you need infrared LED emitters, you can pick up 20 for $3.99.

Don’t miss HacknMod’s communicating using infrared LEDs tutorial.
There’s plenty of software you can install to control this ciruit; for Linux you can use Lirc and for Windows you can use either Winlirc, Girder, IR Assistant or uIRC.

www.hacknmod.com

1,5V TRACKING TRANSMITTER

2009-03-05T13:33:00.000-08:00

CLICK HERE FOR DETAIL

12 to 220 VAC converter from SAM ELECTRONIC

2009-03-05T13:04:00.000-08:00

12Vdc to 220Vac 50W Converter

X In a lot of cases we needed a 220VAC voltage, in spaces where it does not exist, in order to we supply with power, various small appliances. In the Fig.1, exist a voltage converter circuit from 12VDC in 220VAC, with output power roughly 50W. The circuit is constituted by the oscillator, round the IC1, one divader IC2, one unstable multivibrator IC3, which give in the output symmetrical square signal of frequency 50HZ, follow a buffer stage with Fet Q1-2, the drive stage Q3-4 and the power stage Q4-5, the power transistors Q5-6, should they are placed in heatsink.. The diodes Zener D2-3, protect the power transistors from voltage peaks, that are produced by the transformer T1. Transformer T1 are a simple power transformer, with intermediate reception, which is connected in the contacts of CO1. For the use that him we want, the T1, is placed in reverse, with secondary convolution it is used as primary, with the intermediate reception she is connected in the positive point of battery 12V and the two other contacts are connected in the emitters of Q5-6, that are connected in the potential of ground alternately, depending on the rythm that determine outputs 10 and the 11 from IC3.. With this way while in being primary flow AC current, in secondary is created 220V AC square voltage. The use of crystalic oscillator ensures very good reference frequency 50HZ, and use a simple crystal (CR1). For bigger precision, parallel with the C1, exist a variable capacitor Cx, that ensure the regulation of frequency, so that we take in point P1, frequency 204.8 KHZ. It�s obvious that the output voltage in void of load is bigger than the voltage with load. Also the output voltage depend from the output voltage of battery. Thus for battery voltage 14V, the output voltage is increased at 10%, compared to the battery voltage 12V. If the converter work in load power 40 until 60W, then it can be used transformer 2X9V. Various prices of output, for battery voltage 12V and transformer 2X10V, we see in table 1. Elektor6/89

Table 1
Output Power	Output Voltage AC
0W	238V
25W	220V
40W	202V
75W	170V
100W	150V

Part List

R1=10Mohms	C4=10uF 16V	IC2=4013
R2=100ohms	C5=47uF 16V	IC3=4047
R3=1.2Kohms	C6=470nF 400V	CR1=3.2768 MHZ crystal
R4=560Kohms	D1=5V6 0.4W	T1=220Vac/2X10V 2X2.2A *see text
R5-6=2.2Kohms	D2-3=47V 1W	F1=5A Fuse
R7-8=56 ohms 5W	Q1-2=BS170	F2=0.25A Fuse
CX=22pF trimmed capacitor	Q3-4=BD139	L1=1H smoothing choke
C1-2=22pF ceramic	Q5-6=BD249
C3=8.2nF 100V MKT	IC1=4060

Fig.2- 12Vdc to 220Vac converter PCB component (top) side.

Fig.3- 12Vdc to 220Vac converter PCB bottom side.

In the Fig.2, exist the printed circuit with the layout of material [ top side ] and in the Fig.3 exist PCB from the bottom side (brass side).

Sam Electronic Circuits 4/02

FBT FSV - XXX REPLACEMENT

2009-03-02T12:47:00.000-08:00

from :KRABI TV REPAIR

Flyback transformers replacement guide
FSV XXX
Original	Equivalents	Diagram
FSV 14 A 001	FSV14A001	VIEW
FSV 14 A 001 S	FSV14A001	VIEW
FSV 14 A 004	FSA 38019 S	VIEW
	FSA 38026 S
	FSV 14 A 004 AA
FSV 14 A 004 AA	FSA 38019 S	VIEW
	FSA 38026 S
	FSV 14 A 004
FSV 14 A 004 C	FSV 14 A 004 H	VIEW
FSV 14 A 004 C	FSV 14 A 004 C (S)	VIEW
	FSV 14 A 004 F (S)
FSV 14 A 004 F	FSV 14 A 004 C (S)	VIEW
	FSV 14 A 004 F (S)
FSV 14 A 004 H	FSV 14 A 004 C	8628
FSV 14 A 004 H (S)	FSV14A004CS	VIEW
FSV 14 A 004 S	FSA 38019 S	VIEW
	FSA 38026 S
	FSV 14 A 004
	FSV 14 A 004 AA 2
FSV 14001		8207
FSV 17 A 001		VIEW
FSV 20 A 001	FSV 20 A 001 A	VIEW
	FSV 20 A 001 D
	FSV 20 A 001 S
	FSV 20 A 001/27
FSV 20 A 001 A	FSV 20 A 001	VIEW
	FSV 20 A 001 D
	FSV 20 A 001 S
	FSV 20 A 001/27
FSV 20 A 001 D	FSV 20 A 001	VIEW
	FSV 20 A 001 A
	FSV 20 A 001 S
	FSV 20 A 001/27
FSV 20 A 001 S	FSV 20 A 001	VIEW
	FSV 20 A 001 A
	FSV 20 A 001
	FSV 20 A 001 D
FSV 20 A 001/27	FSV 20 A 001	VIEW
	FSV 20 A 001 A
	FSV 20 A 001 S
	FSV 20 A 001/27
FSV 20 B 001		VIEW
FSV 20 B 001 A	FSV 20 B 001 AS	8170
	FSV 20 B 001 S
FSV 20 B 001 AS	FSV 20 B 001 A	8170
	FSV 20 B 001 S
FSV 20 B 001 S	FSV 20 B 001 A	8170
	FSV 20 B 001 AS
FSV 20 B 013		VIEW
FSV 20 B 016	FSV 20 B 018	VIEW
	FSV 20 B 018 C
	FSV 20 B 018 V
FSV 20 B 018	FSV 20 B 016	VIEW
	FSV 20 B 018 C
	FSV 20 B 018 V
FSV 20 B 018 C	FSV 20 B 016	VIEW
	FSV 20 B 018
	FSV 20 B 018 V
FSV 20 B 018 V	FSV 20 B 016	VIEW
	FSV 20 B 018
	FSV 20 B 018 V
FSV 20 C 012	FSV 20 C 012 A	VIEW
	PET 20-02 B
	PET 22-21
	PET 22-21 B
FSV 20 C 012 A	FSV 20 C 012	VIEW
	PET 20-02 B
	PET 22-21
	PET 22-21 B
FSV 21 A 002	FSV 21 A 002 A	8327
	ZTFM 23002 A
	ZTFK 33005 A
FSV 21 A 002 A	FSV 21 A 002	8327
	ZTFM 23002 A
	ZTFK 33005 A
FSV 21 B 005	FSV 21 B 005 (S)	VIEW
	FSV 21 B 005 A
	FSV 21 B 005 A
	FSV 21 B 005 S
FSV 21 B 005 (S)	FSV 21 B 005	VIEW
	FSV 21 B 005 A
	FSV 21 B 005 A (S)
	FSV 21 B 005 S
FSV 21 B 005 A	FSV 21 B 005	VIEW
	FSV 21 B 005 (S)
	FSV 21 B 005 A (S)
	FSV 21 B 005 S
FSV 21 B 005 A (S)	FSV 21 B 005	VIEW
	FSV 21 B 005 (S)
	FSV 21 B 005 A
	FSV 21 B 005 S
FSV 21 B 005 S	FSV 21 B 005	VIEW
	FSV 21 B 005 (S)
	FSV 21 B 005 A
	FSV 21 B 005 A (S)
FSV 21 C 101	6174V6002K	VIEW
	6174V6002T
	6174V6008A
	6174V6008B
	6174V6040C

mikroElektronika download

2009-02-25T12:03:00.000-08:00

Download

From our download page you can download our software, manuals, drivers, schematics and examples for our products. Download page is divided in three sections.Every section has subsection containing downloads for specific product.

mikroBasic for PIC

mikroBasic compiler [11.1MB]
[current build 7.0.0.2]

mikroBasic manual [1.78MB]
(2006-11-01)

Migration Path Document [140KB]
Creating First Project in mikroBasic for PIC [859KB]
[FR] Creating First Project in mikroBasic for PIC [863KB]
Reference Guide for Basic language [652KB]
Compilers IDE [1.92MB]
Obtaining and Activating the License Key [350KB]
[FR] Obtaining and Activating the License Key [2.3MB]

mikroPascal for PIC

mikroPascal compiler [11.4MB]
[current build 8.0.0.1]

mikroPascal manual [1.76MB]
[2006-10-24]

Creating First Project in mikroPascal for PIC [860KB]
[FR] Creating First Project in mikroPascal for PIC [862KB]
Reference Guide for Pascal language [763KB]
Compilers IDE [1.92MB]
Obtaining and Activating the License Key [350KB]
[FR] Obtaining and Activating the License Key [2.3MB]

FBT 154-XXX REPLACEMENT By:Krabi tv repair

2009-02-10T09:35:00.000-08:00

from:krabi TV repair

Flyback transformers replacement guide
154 XXX
Original	Equivalents	Diagram
154 183 L		VIEW
154 183 W		VIEW
154 185 A		NO VIEW (46144)
154 189 C	154 189 E	VIEW
154 189 E	154 189 C	VIEW
154 189 G		8349
154 189 H		8096
154 189 N		8422
154 194 B		7666
154 194 D		7906
154 194 Y		7652
154 195 A		7673
154 195 E		46144
154 195 M		7673
154 195 Q	KFJ 9238 A	VIEW
154 195 Q	KJF 9238 A	VIEW
154 197 A		7673
154 197 B		7673
154 198 A		7537
154 198 B		VIEW
154 199 D		7484
154 207 A		7910
154 207 B	154 207 N	7606
154 207 D		7997
154 207 E	154 168 G	7908
	154 207 F
	154 207 V
154 207 F	154 168 G	7908
	154 207 E
	154 207 V
154 207 K		7673
154 207 N	154 207 B	7606
154 207 R		8143
154 207 S		8142
154 207 V	154 168 G	7908
	154 207 E
	154 207 F
154 210 A		NO VIEW (46144)
154 212 A	154 218 A	VIEW
	154 218 B
	154 224 A
	47F130639
154 217 A		46210
154 218 A	154 212 A	VIEW
	154 218 B
	154 224 A
	47F130639
154 218 B	154 212 A	VIEW
	154 218 A
	154 224 A
	47F130639
154 218 C	154 382 F	46127
	6174Z2001A
	6174Z2001AGTZ
	6174Z2001E
	6174Z2001EGTZ
	6174Z2001F
	6174Z2001Z
154 224 A		46147
154 225 A		46210
154 229 F		7969
154 229 G		7985
154 229 H		7994
154 238 A		8759
154 243 A	154 382 A	VIEW
	154 384 A
	6174Z2001B
	6174Z2001BGTZ
154 245 A		VIEW
154 277 A		7703
154 277 B		7432
154 277 C		7806
154 277 F		8277
154 277 M		7945
154 277 V		8536
154 279 C		7960
154 299 F		7969
154 306 A		7537
154 308 A		7896
154 309 A		7932
154 311 B	154 388 F	VIEW
	39 L 1027 AZ
	39 L 426 AZT
	391027 A
	39426 A
	730 302 1433
	730 302 1433 A
	730 302 1433 B
	FEA 241
154 374 A		7985
154 374 B		7995
154 375 A		8277
154 375 B		8524
154 375 C		8390
154 375 D		8277
154 375 F		7906
154 375 H		8163
154 375 J		8171
154 378 A		7443
154 380 A		8455
154 380 C		8390
154 382 A	154 243 A	VIEW
	154 384 A
	6174Z2001B
	6174Z2001BGTZ
154 382 B		46172
154 382 F	154 218 C	46127
	6174Z2001A
	6174Z2001AGTZ
	6174Z2001E
	6174Z2001EGTZ
	6174Z2001F
	6174Z2001Z
154 382 G		8423
154 384 A	154 243 A	VIEW
	154 382 A
	6174Z2001B
	6174Z2001BGTZ
154 388 F	154 311 B	VIEW
	39 L 1027 AZ
	39 L 426 AZT
	391027 A
	39426 A
	730 302 1433
	730 302 1433 A
	730 302 1433 B
	FEA 241
154 388 G	39 L 1034 AZ	VIEW
	391034 A
	6174Z2003C
	730 302 0564
	730 302 0564 A
	FEA 287
	FSN 15 A 008
	FSN 15 A 008 F
	FSN 15 A 008 S
	FSN 15 B 004
154 7900-3243	154 7950-3243	3650
154 7950-3243	154 7900-3243	3650
154 8900-3243		3603
154 A 01 C	154 064 C	8422
	154 064 D
	154 189 N
154 A 02 A	154074S	VIEW
	154074V
	154074W
	154082R
	154146B
154 A 06 B	154 177 B	VIEW
154 A 06 C	154 177 C	VIEW
154 A 06 C	154 375 B	VIEW

TIP'S from www.e-repair.co.uk

2009-02-04T11:05:00.000-08:00

Technics CD Models: SL-P1, SL-P2 or SL-P3
Skipping
Remove and replace the graphite grease from the laser transport worm gear assembly (use the correct Technics stuff), replace the worm gear drive belt, and ensure that the tension spring on the C-shaped plastic piece that rides the gear is OK
(Anonymous)

Atari Data Recorders Models: 410 and 1010
Not loading properly
Usually due to incorrect head alignment or dirty head, or failure of LM324 op-amp
(Anonymous)

Aiwa Cassette Deck Model: FX-90K
Refuses to play or change direction (auto-reverse type)
This mechanism uses the capstan motor to change modes, the capstan drive belt was stretched / worn allowing it to slip
(Thunderdunc)

Lg DVD Model: DVD4210
Dead but two supplies working on secondary
Always check the large type diode out of circuit as it will be o/c, Its marked as B10A45VI, fast recovery type will work OK
(Arl)

Philips Micro Hi-Fi Model: MC105
No sound
Replace IC LA7125, TR BDW93C
(Akalipt)

Humax Satellite Model: CR-5510
Various symptoms: Dead, no display. Tries to start up but fails when picture should come on. Goes dead with no display instead of stand-by when switched off by remote control. Faint horizontal hum ripples on picture
Power supply capacitors: C3 (82uF, 400v), C15 (470uF, 25v) and C9 (1000uF, 10v). Horizontal hum ripples when C15 is failing
(Col)

Murata Fax Model: F1
Dead
Replace capacitor C14 (1uF, 50V)
(Akalipt)

Oric Computer Model: ORIC 1
Black screen, no functions
Faulty RAM chips. Can be any or all of them as the originals were low-grade. Easiest way to decide which is to get a white coating of freeze-it spray distributed across all 8 chips, then switch the unit on and see which clear the quickest
(Anonymous)

Trio / Kenwood 70CM Transceiver Model: TR9500
No SSB reception, but OK on FM
Faulty crystal in the SSB local oscillator circuit
(Anonymous)

Panasonic In Car Audio Model: CQRD05
No RDS
Replace IC601
(Anonymous)

Panasonic In Car Audio Model: CQVZ303
No display
Replace Q723
(Anonymous)

Sony Computer Model: HB75
Sprites disappear when unit warms up
Cut the track between pin 39 of IC2 and pin 11 of IC8.
(Anonymous)

Sony Computer Model: HB75
Unstable colour bar at top middle of the screen
Replace R103 with a 1K resistor, R93 with a 330 ohm, and C28 with a 2pF capacitor
(Anonymous)

Aiwa Video CD Player Model: 2001 Series
TOC is not read as if the lens were defective & no display on the tv if video out is connected
Resolder the video card circuit board, typically the two video drive ic's. Take extreme care in resoldering it !
(Rams-Dumaguete)

Sharp DVD Model: 740 / H
No audio
Replace C58 (470uF, 25V) on main pcb (it will be short)
(Carl Ray)

Arcam CD Model: ALPHA 7
No sound, just crackles, coax out ok
LK14 o/c, Change from 10 ohm to 22 ohm resistor, Thanks to Arcam Technical for answer
(Anonymous)

Jvc CD Model: MX-D2T
No sound but crackling in the speaker about once in 3 seconds
Change the drive 2SB1274 (replacement BD244), don't forget brackets and stuff
(Jonnyk)

Denon DVD Model: DVD-F100
Unit dead
Diode FCH20A15 mounted on a small heatsink on the power supply PCB may be short circuit. Replacing this should cure the problem (Denon part number 04/2760706008)
(Farrance electronics)

Humax Satellite Model: CR-5510
Goes through "loader" routine, then quits at point where relay "click" should be heard and picture should come on. Display goes blank
Capacitor C3 (82uF 400v) in power supply unit. Usually has deformed top due to gas build-up
(Col)

Philips DVD Model: DVD701
Dead
If D6241 is s/c to prevent it recuring add C2251 (1KV, 470pF), change D6261 to type BYD33M and change L5260 to a 22mH coil
(Gary)

Thomson Digital Terrestial Box (DTI353 Chassis)
Standby only
Changed VMOS (STP22NF03L)
(Jonnyk)

Philips DVD Model: 701
No power, No Display - test voltages on secondary side of transformer were pulsating
Check diodes 6230, 6240, 6210. They are BYW98 Rectifiers, in my case it was s/c. Thanks to Sparky for similar tip - Philips CD Model: CDR770/00
(Matt)

Rca Satellite Model: DRD420
No power
This can sometimes be fixed by resoldering JW14103 in board location VV11/12. During manufacturing, only a small amount of solder is used, and with a little shock & heat, it comes off. Bad RCA! :)
(Dan Whelan)

Humax Satellite Model: IRCI-5400
Turns off for few seconds then completely dead, no display
Replace C16 (470uF, 25V) in the PSU
(Vincenzo)

Jvc CD Model: UXT100
Dead, No display / clock
Check 6V output on Reg IC703, on LCD/CPU pcb. If low volts replace reg.
(Clive - Swansea College)

Technics CD Model: SLP5620A
Tray will not respond to open/close button, everything else is OK
Dry joints on front switch panel at S626 and S619
(Diy Dave)

Goodmans DVD Model: GDVD125
Dead, PSU ticking
C27 (1000uF, 10v) o/c in PSU secondary
(Paul Willis tv & video repairs)

Sanyo Camcorder Model: VM-D6
No picture when tape is being played, ie: blank raster
Check L1101, L1102
(A.b.s.)

Hitachi Camcorder Model: VM-E10
No video (E-E), on camera section
Check for C5V1 line, if not present, check F051 in fuse pcb
(A.b.s.)

Sony Camcorder Model: CCD-TR705
Doesn't record properly, ie: looks like one channel is down when recorded, pre-recorded tapes are ok
Check Q008 for dry joints
(A.b.s.)

Sony CD Model: HCD-GRX70
CD does not run
Clean lens and adjust the disk level
(Anonymous)

Panasonic DVD Model: SA-HT70
Not spinning disc
If it spins with a little help from yourself replace the spindle motor with improved motor, part number: RXQ0749A
(Aleister Crowley)

Panasonic CD Model: RX-DT505
This fault would only occur on c.d play back. The sound would gradually start to distort, until all that could be heard was complete distortion. This fault was intermittent and would occur whenever it felt like
Believe it or not,this fault was cured by replacing the optical unit
(Sparky)

Infinity Model: BU-120
No power and no output
Replace C6 with 4.7uF, 250v
(Aleister Crowley)

Bush DVD Model: DVD1000
Power LED on but no action from unit
Low 5v Rail in PSU. Replace C213/4 (1000uF, 16v)
(Rich)

Kenwood DVD Model: RXD-DV9
Procedure to reinitialise the system
Hold down the 'enter' button while applying mains power
(Josh)

Digibox Satellite Various Models
Personal planner memory contains a programme/event that can not be removed
Remove the viewing card, disconnect the unit from the mains for a few minutes, reconnect mains then select 'programme planner', then press the yellow button, the viewing card can then be reinserted
(Josh)

Pace Satellite Model: 2200 (PCB 184-0540103 Chassis)
Standby led flashing and psu clicking
Resistance on 3.3v rail measured with respect to OV line found to be about 100 ohms, D852 found to be short circuit, Replace U700, Q850, U858, D852, U854, U853, U852, U851, U850, D800, VDR850, D854, U3, U1, C3, U2, D4, D1, D2 and D20
(Pete)

Pace Satellite Model: 2500 (PCB 184-0540201 Chassis)
Unit stuck in standby, no signal present at U700 pin 73
With unit connected into phone line and measuring output of D800 typ. 39v (faulty unit measured at 5.6v). Advise replacement of U700, U852, D852, C852, Q850, D544, U858, U850, U853, U854, D800, VDR850, Q853
(Pete)

Soundlab Strobe Light Model: SP-106S (SP-106S REV. 4 Chassis)
Intermittently skips flashes then eventually dead
R6 (1M2 for 230V model) was open, replacement cured fault
(Joe Kelleher)

Philips CD Model: CDR770/00
No power, voltages on secondary side of chopper were very low and pulsating
Check diode 6230. It's a BYW98, in my case it was s/c. Note: it's the rectifier for the 14v line
(Sparky)

Hitachi Camcorder Model: VME55A
Tape looping on eject
Usually due to the gear clutch assembly but this time it was due to the bottom of the cassette holder (bent down)
(Anonymous)

Toshiba DVD Various Models
No or low sound and possible display faulty
Toshiba mod is to remove C928 not replace it, check and change C927 and C929 if faulty
(Toshiba Agent)

Philips CD (Most Models)
Procedure to enter the test mode
Disconnect the mains supply. Press and hold start and stop button and power up from the mains, you then enter the test mode. Using the FF and FW you can select the test option, you can test the spindle motor, laser focus ...etc
(Costas-Hellas)

Pioneer Stereo Amplifier Model: DC-X88Z (main pcb)
Lights up but no audio output. Power relay RY1 and RY2 not pulling in
The relay coil supply resistors R544 and R543 were burnt up and there was no HT to audio output IC501. The Protection diodes D541 and D542 across the relay coils were shorted. Replace using 1N4007 etc
(Audio Vision - New Zealand)

Technics Graphic Equalizer Model: SH-E85
No display
Check R754 (0R47). Note-this is a separate unit which comes as part of a stack system
(Sparky)

Philips CD Model: CD165
Unable to detect discs
The laser head was the culprit. Replacing it fixed the problem. (Laser head code GRP6278A)
(Rui Loureiro - Portugal)

Acoustic Solutions DVD Model: DVD451
Fluorescent display would intermittently become corrupted and the tray wouldn't eject
Resolder the surface mounted chip on the front p.c.b where the fluorescent display lives
(Sparky)

Sony Camcorder Model: CCD-F455
When head drum finally spins, it rotates slowly
Change capacitors - C513 (33uF, 10V) and C506 (4.7uF, 35V)
(Tony)

Sony Camcorder Model: CCD-TR105
No playback - looks like heads aren't connected, except blank raster with a few white spots
Check coil (L065), and see if it has fallen off, caused by screw from viewfinder
(Tony)

Digipro Satellite Model: DS3002A (Digit-Analog sat.receiver)
Completely dead, no display, no standby. All power supply secondaries low (e.g. 8VDC rail was as 3.3VDC
Checked the resistance on all power points, the 3rd was low (10-20 ohms)in the 22V rail, the LNBP20PD IC was also damaged (pin3)
(Toroxultan)

Toshiba DVD Model: SD210E
Lost front display panel and sound
Replaced C927-C928 (100uF, 16v) with 100uF, 25 volt types, this brought back to full working order
(Anonymous)

Bysat Satellite Model: RS 1000E
Visible only in bright scenes an horizontal bar rolling slowly (like 50Hz hum interference). Decreasing video level via VR1 makes it disappear
Capacitor C112 (220uF 50V) had its copper track on the board broken. In this receiver VR1 (video level) is adjustable through the bottom and the user or installer might have lowered it to prevent the interference - check for proper video level at scart output and readjust as necessary
(Jeroni Paul)

Daewoo Satellite Model: SETPAL
Locking up and int screen turning green/pink having to remove power to reset
Contact Daewoo who advise they know of problem it has been happening for about a week (Jan 15/1/2003) They are working to find software bug and will send update to receivers when fix found ! only happening on certain receiver / transmitter combinations
(Edward Conway)

Bysat Satellite Model: RS 1000E
Power line hum on the picture (as slowly rolling horizontal lines)
Capacitors C104 and C107 (100uF, 16V) dried up and a medium sized cap (1000uF, 16V) between two bigger caps (2200uF 25V/35V) was also bad. Also check C108 and C101
(Jeroni Paul)

Kenwood CD Model: B-B5
Dead or relay chattering, worse when cold
Check C110 (47uF, 25v)
(G Lewis)

Tredex DVD Model: TX3000E
Stuck in standby, no functions
LT supply seemed ok, although there was some instability. C306 (68uF, 400v) mains smoothing capacitor on the primary had gone low capacitance and the instability had shut down the micro
(L. Shelbourn)

Lg DVD Model: DVD5083
Dead
Replaced IC101
(Anonymous)

Sony CD Model: CDP-H3600
Difficulty reading cd, if it does read the sound is strange and sticks
Replace C101 (1000uF/16v)
(Akalipt)

Sanyo DVD Model: DVD7201
Locked draw and showing locked in screen
Press open draw button plus the ff button for 10 seconds
(Anonymous)

Toshiba DVD Model: SD-1700
Lost audio output and front panel display second time Player was used
Replaced C927 and C928 (100uF, 16Volt) with higher voltage parts and normal operation resumed
(Saverio G.)

Sony CD Model: HCD-RX33
Dead, no power up on pin 2 of ic601
Replace x601 on main processor ic601
(Brko)

Toshiba DVD Model: SD-1750 / SD-2800
No sound
Replaced C927 / C928
(Marco. P)

Philips LC4x00 LCD Projectors
The projector is dead. Fuse is OK. Lampdoor switch is OK. No relay click is audible.
Check R3204 (3R3 NFR HT Type) on PSU for open circuit. This can be caused by repetitively switching the projector off and on and causing the resistor to overheat.
(John - TelePlan)

Philips LC4x00 LCD Projectors
The main 4 amp fuse is blown and it blows again immediately after replacing it.
Check 6212 (BT151-800). Also check 6222 (Bridge rectifier). Change R3213 10K NFR into 10ohm NDF type and put 220nF/75V parallel to R3212.
(John - TelePlan)

Sanyo PLV20B Projector
Cuts off when warm (May not go off on soak test)
Dry joint on the collector of chopper transistor(Q60 Something).
Can save wasted calls!! (Satellite Tv.Video.Hi-fi)

Sony Projectors
Blotched of one or more colour in and around the centre of the screen
One or more of the three tubes will have spot burn. Replacement required as will the modification kit to stop the burn
(Neil Scotford)

Toshiba Fax Model: TF-251
Unable to change the station i.d details
In some European models the procedure is supposed to be carried out by Toshiba. To change, access the engineers menu by pressing the 1 and 3 keypad keys while applying power, you now have extra engineering options in the menus, go to the installation menu and set up station name and id, when finished disconnect power from machine to write new settings
(Josh)

Alba DVD Model: DVD103XI
Dead or slow start up, 12v line pulsing
C11 (2200uF, 10v) in the psu was leaky
(Gazza)

Pioneer DVD Model: VS77
Unable to detect dics
Laser head faulty (Do not confuse, you may see the emitted red light from the head even it is faulty)
(Mongkut)

Toshiba DVD Player Model: SD-110E
No sound and no Display
C928 (100uF 16v) goes s/c on main Decoder pcb
(Zigger)

Ge Microwave Oven Model: JE1540GV002
No high voltage
Replaced the high-voltage capacitor (0.95uF, 2100 WVAC)
(BenRose)

Fisher Stereo Amplifier Model: CA-857
Line fuse blows
Replaced transistor Q2 type 2SC3260 and Q4 type 2SA1301. Replaced 5A fuse. Both Q2 and Q4 were shorted
(BenRose)

Technics CD Model: SLP1,2,3
Skipping tracks
Firmware problem with the Servo microcontroller, continuous PWM pulses to the traverse motor causes the laser assy to move even with zero offset input from the tracking signal. As the deck ages the problem becomes worse. There is no need to replace the deck or microcontroller as this fault is a design fault. Simply add two 1N4001 diodes (connect these A-K and K-A in other words in parallel with each other back to back to obtain a volt drop of + or - 0.7V) and put them in series with the traverse motor. This solves the problem!
(Steve)

Panasonic Satellite Model: TU-DSB31
Dead
D811 s/c and Zener D825 failed (both in PSU). I also changed the chip in the PSU as a precaution, this cured the fault
(B. Goan)

Denon DCD-635 CD player
Hi all, if you come across one of these stand alone cd players with very slow spindle motor drive and the inability to read the toc because of low disc speed.
There is a small stand alone 47uF 4v smd can on the laser assy board visible from the top looking down. change it and all will be restored, its a kick for the spindle motor drive circuit.
(Dave Gough)

Fisher Stereo Amplifier Model: CA-9335
A & B had no output. Surround amplifier output very weak
Replaced IC670 Type STK401-140 and IC471 Type STK400-020
(BenRose)

Sony CD Radio Cassette-Corder Model: CFD-ZW155
Dead set
Replaced IC Type LA4597
(BenRose)

Canon Camcorder Model: VM-E1
Capstan motor is not running when the tape is in camcorder
Check IC504, Sony 5v04 20036
(Robert)

Panasonic Camcorder Model: NVS-1
Dew indicator is on permanently. Cannot play or record tapes. No dew present - caused by internal fault
This Camcorder uses very fragile flexible circuits to interconnect the PCB's. They plug in to edge connectors. It seems that when they made these camcorders at the factory, they had as many problems getting these film flexy circuits back into the connectors as us service engineers have. I saw one unit that had a crease in the flexy circuit which had caused a hair-line fracture. Solution, trace the wiring and solder a sub-miniature wire across the broken track. Don't disturb any flexy connectors that you don't need to. This camcorder is a bitch to work on
(Anonymous)

Mitsubishi Camcorder Model: HS-C50
Head drum spinning too fast
Change capacitors,: C4A4, C4A3, C4C1, also clean both sides of the p.c.b as there may be some excessive fluid from the leaky capacitors
(A.B.S)

Camcorder: Sony CCD-V8
No functions, Dew indicator permanently lit
Suspect diode D613 on the SK4 panel

No / Poor capstan servo lock
Check coil L131 for dry joints / failure then check capacitor C189 & filter FL108 before Suspecting failure of IC106 [CX22022] (all components on panel V17)

No operation via battery
Check fuse F901 for o/c

Int switches off
Check around link PS602 on the RS5 board for dry joints then suspect diode PH602 (panel RS5)

Int tape damage and mis-tracking
If the pressure lever is jamming under the pinch roller suspect a warped loading ring

Int / No playback colour
Check for dry joints around delay line DL104 then check FL104 on panel V17 for o/c (Alan Gallagher)

Various Models / Chassis
General failure when units warm / hot in high humidity environments. Units operate normally once cold, failure only occurs occasionally then seems OK but when warm fails again
Many PCB's/components have contamination which will manifest themselves in warm and humid environments, so once unit is warm then electrical failure occurs. Clean circuit first in solvent/water combination and retest unit. Failure should dissapear. If corrosion found on joints then reheat with soldering iron which you may see joints bubble then clean PCB thoroughly. Best to soak in cleaner then wipe around with lint free wipe especially around powered components. NOTE contamination is typically hygroscopic and will attract moisture if particularly bad will electromigrate if not too bad then poor SIR Surface Insulation Resistance (occasional unexplained failure) Could go on for long time but this is only the start! Does this sound familiar to anybody ??
(Greg York)

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JVC MENU SERVICE TV CODE

2009-01-24T10:13:00.002-08:00

After you get to the item that needs adjusting
Write down the original setting
just in case you have to go back.

1. TV turned on
2. Press the 'Information' and 'Mute' keys at the same time, on the remote.
You are now in the Adjustment mode
4. Use the number keys to select the category.
5. Use the 'Volume up or dwn' to enter the category.
note:Some models may not have Category Selection.
6. Use the 'Channel up or dwn' buttons to select item to be adjusted.
7. Write down the old value of the item before changing.
8. Use Volume up and down adjust the value.
9. When you have made all the adjustments you want press the 'Information' key to exit.

Data sheets are available for most models. These sheets list a description for each
item as well as data range and typical settings for your model. If your setting is
substantially different than the sheet then you may be developing a problem.

JVC MENU SERVICE TV CODE

2009-01-24T10:13:00.000-08:00

RCA/GE Service Menu Adjustments

2009-01-22T09:26:00.000-08:00

RCA/GE Service Menu Adjustments

1. TV turned on
2. Press and hold the 'Menu' button at the tv.
3. Press and release the 'Power' button.
4. Press and release the 'Vol up' button.
5. Release the 'Menu' button.
6. The initial security parameter displayed will be 'zero' Change this to '76'. You are now in the Adjustment mode
7. Use the 'Channel up or down' to select parameter 'P'.
8. Write down the old value of the parameter before changing.
9. Use the 'Volume up or down' to change the parameter value.
10. When you have made all the adjustments you want turn the set off to exit.

collected by; Solderknight

ADJUSTING SONY'S TV

2009-01-20T19:43:00.000-08:00

SONY TELEVISIONS

Read the _ SERVICE MODE WARNING _ before proceeding.

Service switch - small, round opening in the rear cabinet near the Video inputs or the antenna jack (typically early-90's), push and hold while turning the power on - or if there is no service switch on the rear of the TV use the remote control and press within one second of each other:

[PWR OFF] - [DISP], [5], [VOL+], [PWR ON]
-or-

[PWR OFF] - [DISP], [5], [PWR ON]
-or-

[PWR OFF] - [DISP], [5], [VOL+], [PICTURE], [PWR ON]

The TV will turn on in service mode.

You may need to set the television into 'tuner' mode (instead of Video-1, etc.) before performing the service mode button sequence.

NAVIGATE IN SERVICE MODE
[1] = Moves to Previous Menu Item
[4] = Moves to Next Menu Item
[3] = Adjusts Value Up
[6] = Adjusts Value Down
[MTS] = Toggles Stereo/Mono Audio

SAVE NEW SETTING
[MUTE] followed by [ENTER] to store NEW setting to NVRAM

RESTORE USER SETTINGS
[8],[ENTER] = Restores All *USER* setting to Factory Defaults

RESET VALUES
[0],[ENTER] = Read Default Value from Stored Settings (Reset)

LEAVE SERVICE MODE
[PWR OFF] = Leave Service Mode any settings not written will be in effect until TV is unplugged or a Reset is performed.

RETURN TO DEFAULT SETTINGS:
* BEFORE storing NEW settings - unplug TV from wall, wait a few seconds, then plug back in, turn TV set on - All settings not written will have been lost.

* AFTER storing NEW settings - restore original value from list you made of original values before adjustments and store in NVRAM.

If you're attempting to adjust color or geometry errors, you'll need the Video Essentials DVD, Laser Disc or some other source of test material.

I also maintain a SONY XBR Service Mode list on my HomePage.

For additional information on how to preform the 16x9 squeeze (to view anamorphic DVDs at their full resolution) see the "16x9 (Anamorphic) Vertical Squeeze" or the "Sony Wega 16x9 (Anamorphic) Vertical Squeeze" FAQs that I maintain on my web site.

A complete although somewhat outdated list of Sony XBR Service Mode items can be found at http://www.repairfaq.org/~filipg/. This information appears to be for the ~1990 version of the XBR^2 series.

Note: Provisions for convergence adjustments are not enabled on 27" or smaller Sony direct view television sets.
5.1a SUGGESTED SONY SETTINGS
SONY "XBR" SERIES

TRINITONE: NTSC STD - controls color temperature - basically how greys will appear on the monitor. The "High" and "Medium" settings make everything look too blue.

NR: OFF - filters out high-frequency noise, at a slight loss of detail. Turn it OFF and the picture quality improves. It also tends to degrade fine picture detail.

DYNAMIC PICTURE: OFF - when turned ON it whitens light areas and darkens shadow areas of the picture, creating a high contrast although less accurate picture. Leave it OFF.

COLOR CORRECTION: OFF - when turned ON it tries to correct fleshtones but has a tendency to mix up certain colors and make them look like a prosthetic beige.

PROGRAM PALETTE: MOVIE: ON - only the movie mode allows the television set to run with flat and wide video bandwidth. It also shuts OFF scanning velocity modulation (SVM), when VMLV is run down to zero it will shut OFF SVM for the other modes. Each mode (Movie, Sports, etc.) has a separate adjustment memory.

SERVICE MODE ITEMS:

AXIS 0 Cleans up the red push & oranginess in the yellows
VAPI 0 Do this for all modes
VAPG 0 Do this for all modes
NRLV 0~3 Find the value 0-3 that gives the best resolution
VMLV 0 Scanning Velocity Modulation (SVM) OFF=0/ON=1
(do this for all modes)
Y-DC 0 Improves BLACK background level retention
R-YR 15 Sets the amount of RED
R-YB 15 Sets the amount of RED
G-YR 11 Sets the amount of GREEN
G-YB 9 Sets the amount of GREEN (8 or 10 may be closer)
SHPF 3 This helps with the sharpness (S-Video)

Setting R-YR and R-YB to 15 will greatly improve color accuracy and tone down the reds. Also, when Y-DC is changed from 1 to 0, DC restoration becomes almost perfect.

Sometimes setting items G-YR to 11 and G-YB to 9 may need some more fine tuning using the SMPTE color bars w/gray reference [split bar pattern] ("Color Bar w/75% Gray" VEDVD-18/3, Frame VE-46673, AVS-14415 - NOTE: VE 46673 is mis-calibrated, use AVS-14415) See the section on Setting Tint & Color Level: Matching Gray Reference for the procedure on how to adjust these two settings.

SONY "V" SERIES

GDRV 18 Green Amp.
BDRV 14 Blue Amp.
GCUT 4 Green Cutoff
BCUT 1 Blue Cutoff

Note: The setting for AMP and CUTOFF appear to be relative and not absolute on the "V" series - thus they may not work for your particular model TV.

WEGA SERVICE MODE ITEMS:

4BCT 7 input4 (component) Blue Cutoff (BCUT -1)
4BDR 30 input4 (component) Blue Amp (BDRV +1)
4GCT 5 input4 (component) Green Cutoff (GCUT +0)
4GDR 36 input4 (component) Green Amp ((GDRV +2)
BCUT 10 Blue Cutoff
BDRV 29 Blue Amp
GCUT 10 Green Cutoff
GDRV 34 Green Amp
DPIX 0 Dynamic Picture
Y-DC 0 Improves BLACK background level retention
HOSC 11 Fixes problem with color banding on component input

SONY "MODEL-ID" SETTINGS
These ID setting are different for every chassis - in general here's what they control:

ID-0 Controls number of active video jacks.
ID-1 This controls video features. Allows notch filter
(NOTC) to be turned off outside of service mode.
ID-2 This sets up user interface features. Enables Spanish
language menus. Allows naming of video inputs.
ID-3 Enables / disables Picture-In-Picture (PIP) support.
ID-4 Enables / disables Lumisponder option.

5.1b SONY MODEL NUMBERS

Model numbers:

KV-ddXBRss
KV = direct view sets
KP = projectors
dd = size of the display
XBR, V, S, T = model line designation.
ss = specific model designation, which appears to be independently unique.

5.1c SONY FRONT PROJECTORS

Someday I will have a complete web page devoted to Front Projectors, but until that day here's how to enter service mode on Sony's Front Projectors use:

[enter], [enter], [up], [down], [enter]

Be sure 'Status' is ON, if 'Status' is OFF, you won't be able to get into service mode.

The manual says to make sure the remote is hard-wired, but the IR mode has always worked fine for me.
5.1d SONY PLASMA MONITORS

Turn on the power. Press [Enter], [1], [8], [2], from the remote.

2009-01-19T00:21:00.000-08:00

LITTLE NOTE

AIWA A14-S1
Capturing Dark BRIGHT AND EVEN IF IN CONTRAST exaggerated, Still No KONTRAS.CHANGE R ABL R614: 150K

AIWA C20 KER
Raster Image ONLY OR IF ANY, ONLY DIRECT pause and lost. COLOR OR BLACK PUTIH.CHANGE IF ONLY AFT: 656

SHARP C14JO
ONLY SOME SORT IMAGES RASTER ONLY HAPPENS TO 12V LINE.CHANGE Q604 FOR FURTHER portion 12VOLT Go to tuner.

SHARP EXPRESSION 51X220
Quick View WITHOUT IMAGES WITH ON POSITION . BACK TO Standby (PROTEK). CHANGE R divider FOR 180V R621: 1 OHM

SANSUI SV-2050J
The image appear FILCKER and vibrates in lines thick DARK COLOUR.CHANGE c 708: 220/50V, C 517 AND 518: 100/160V.

SANYO CG21 XS2
TV LOCKED ON STANDBY.POWER POSITION TO START BUT BACK PROTEK.CUT OFF jumpers J830 or Change FBT.

DIGITEC DM172021
Can not save SAT PROGRAM IN SEARCH although transformer AFT (9074) and VIF (9073) IS GOOD.CHANGE D712 ZENER 5VOLT NEAR IC MEMORY MN12C201D

DIGITEC BLACK BEAUTY BB2071
VOLTAGE 300V and 115V THERE, FBT START ONLY FLASH, 12V IC FOR OSC.HOR ADA.TV still not START.CHANGEC76: 180N IN REGULATOR

DIGITEC / POLYTRON DM 143,031
SLOW TO START, blinking AND FIGURES swing wide GAMBAR.CHANGE C518: 100/35V. c514: 330/35V. C515: 680/560pF. R511: 5KOHM / 1%. R517: 15KOHM / 1%

DIGITEC DM143031A
FIRST TIMES switched image appear NO PICTURE. WHITE ALL .KEY PANEL NOT WORKI.TVOLTAGE OF 222V ONLY FOR ANY 12V AND 12V measured 10VOLT.CHANGER557: 330 OHM / 1 WATT

POLYTRON / DIGITEC BLACKBOX SERIES
TV ONLY vertical LINE.CONDITIONS PART horizontal component; 2.2 C / R 160V AND 3K9/2W OPEN SHORT.CHANGEC 390 ATAU470n/250V

POLYTRON GRANDMASTER GM 1481
FIGURES DO NOT sync and looks LOGO OF TV station appear in CENTER IN CENTRAL-Limit BLACK LINE .CHANGE R452: 50KOHM 1 / 8 WATT

POLYTRON / DIGITEC
IC TDA 8360/61 ONLY flat horizontal LINE.CHANGE R 401: 2M2 OHM

POLYTRON MINIMAX SERIES MX1452G
TV ONLY sometimes START and difficult to SHOW UP.CHANGE C507: 10/50 WITH 47/100V

SOLITRON SM37-98
POWER SUPPLY NOT ONLY START.B + 45 VOLT.GANTI D81: ZENER 4V7

FUJITEC FTC 1459
Image / Raster off the left AND BECOME A BLACK PUTIH. DROP IN B +. GANTIC 517: 33/160V

JVC AV-K SERIES KT21T2
Raster lines blanking WHITE 2 CM.CHANGE C 428: 100UF/50V.

JVC C 20 RNS
TV frequently BACK TO STAND BY. KEY POSITION AND POWER IN THE TV PROGRAM IN Click TV still can not START.CHANGE R751: 100KOHM

AKARI 20M88R
Raster BIGGER decline.CHANGE D809 IN4148 REGULATOR

AKARI CTV14
No Sound, IC ZILOG NORMAL.IC TA 8690AN STILL GOOD.CHANGE Q06: C3289.

AKARI14-20
IF FIGURES unstable haunting lines OSC HOR NOT AS TEPAT.CHANGEC DRIVERS horizontal 10uF/100V

JHONSON CTV147
vertical lines blanking IN 3 / 4 PART IN VOLUME ATAS.DAN BILA exaggerated, the image appear fester tottery TAK STABIL.CHANGE C119: 470/50V

SONY KV20XXX
IF POWER turned on Raster Image EMPTY AND ONLY DIRECT FULL.CHANGE R627 Sound: 4.7 OHM TO 5.5 V SUPPLY

SAMSUNG CS 5085
Capturing the bottom of the vertical LESS accompanied by lines . Sound piping WHEN TO standby. GANTI C407: 330/50V

PANASONIC TC-GOLDSOUND SERIES
horizontal LINE ONLY IF CONDITIONS Bright / NORMAL.CHANGE R 525: 120K / 470K

Goldstar SOUNDMAX
TV standby POSITION WITH LED Lamp FLICKER.CHANGE DIODA RU2K IN THE NEAR STR 6707 D IN4007.CHANGE 330ATAU470/35.

Goldstar / LG
TV frequently OFF TO ITS POSITION standby, IF POWER IN REMOTE Turn on TV START.BUT BACK TO BACK OFF AFTER HOURS TO POSITION STANDBY.CHANGE ELCO DRIVERS HOR 10UF/100V

CRYSTAL
TV standby ONLY WITHOUT out. USE REMOTE, press the POWER ON THE REMOTE AND KEY OK and hold TOGETHER CAN START TO TV itself.

Phillips GR1225

TV SLOW TO START CHANGE c5524: 82n/100V AND C254: 220uF/35V

SHARP 21 BN1
LESS KONTRAS. image appear SMEARING HAPPENS TO THE 9v measured 6v.CHANGEQ605: D882 REGULATOR OF 16V TO 9 VOLT.DARI PIN 7 KAKI FBT

FUJI ELECTRIC FCH-2100
FIGURES AND Sound very weak AS SEARCH WITHOUT ANTENNA.AUTO SEARCH NOT WORK, fine TUNING SO.COLOUR STILL BLACK WHITE.CHANGE X-TAL 4.43

INDOTECH 20 "
WHEN THE FIRST IMAGES Bright start shortlyDARK HAPPENS TO BE PART ABL R314: 12OKOHM

SANTEC C1428
TV standby KEY POSITION PANEL AND REMOTE NOT WORK.CHANGE X-TAL PROGRAM: 10M (10,000)

Sanken BAZZONEYE ST 2181
TV ONLY AND KEY POSITION STANDBY.REMOTE NOT FUNCTION.VOLTAGE FOR 24 V AND 12V DROP.CHANGE C 541: C 553 and 100/35: 470/16V

ZIC VIRTUAL BATTERY

2009-01-14T20:53:00.000-08:00

ZIC Virtual BATTERY ( Handphone virtuall batt) is a replacement for you to use your phone as a modem.
Why must use baterei virtual ?.for who use with a cellular phone modem, must know the problem, namely baterei you quickly become hot and extravagant even soak.Alat this is a good solution for maintaining and caring for our mobile phones from its feasibility damage due to over charging baterei.
Virtual BATTEREI that I make this work as follows:
Source portion charged we take from the USB port, because the port is very easy and simple to use and provide adequate resources flow standard at the time of the phone online (500-750mA).
Rangkaiannya How it works is as follows:
Dioda in 5239 or dioda 2Amper standard than useful way to do right polarity voltage components as well as protection against error penggunaan.Anda can only use dioda 1 Amp (IN4002-4007). I use only in 5239 because it wanted to durable, more resistant heat.
Zener 4v3 and dioda IN4007 configured to create a portal voltage of 5V (4.3 volt zener + 0.7 Vin4007) and useful as a protection system against possible voltage hikes if the damage occurred on the CPU.
220nF capacitor as cell baterei .berikut also 100pF capacitor for smooth flow and filtering out through dc I dioda 5239 induction to the wild.
Configuration between zener4v3, dioda IN4007 C 220n and formed a cell of the cells from baterei actually, because it is actually the baterei capacitors do ber large capacity.
You can only remove three components atas.
The way is to use baterei phone I've used in the cells dispose of it, this series and raft on terminal in baterei do with the polarity is right.Buat two holes to go to the cable jack / colokan USB.Tentukan length of cable required and secukupnya use a fiber cable with a diameter of at least 1mm.
If some type baterei mobile phone is very thin, use a small box for this series and connect the two cables to the output voltage to the casing Battery hp.Atau also if you do not have any former Battery casing, use the crocodile clip onto the phone in the terminal batere Pin .. in the middle of a virtual Battery only pin of BSI (Batere Size Insdicator) allows for the Nokia phone.
This series you can make to other mobile phone brands.

the original postby zic at:
http://zicelectronic.tk

TV MENU SERVICE

2009-01-14T20:42:00.001-08:00

MENU SERVICE CODE code is a condition for entry into the "SERVICE MODE". In terms repair television ..
there are several ways, including using the code number or alphabet or a combination of both .. way is to use tricks with the hardware at the point right men-short/jumper / or switch you provide the (sharp, panasonic, Thomson, Phillips, etc.).
here I will give you some way / code to open a menu of services from some television general circulation on the plane .. in Indonesia tv output starting from 2000/01 up to now, as most manufacturers only modify feature only.

TOSHIBA: press firstMUTE IN REMOTE,then press MUTE on RC + MENU IN simultaneous TV .. (repeated)
Press Menu-Press DIREMOTE FIGURES 4,7,2,5
Press VOL (-) IN TV-Press and hold FIGURES 9

SANYO: MENU IN REMOTE + VOLUME UP TV

LG Flatron: Press OK, OK DIREMOTE IN TV REMOTE MENU + or MENU IN TV

TCL: press DISPLAY (OSD) DIREMOTE + VOLUME DOWN IN TV, hold 3 seconds

Phillips: POSITION STNDBY TV, press 0,6,2,5,9, MENU

POLYTRON: POSITION STNDBY TV, press and hold MENU IN REMOTE TO TV on FIGURES entries of the code in 1013.

PANASONIC: SHORT (connect right) PIN 'FA-1' TO 'FA-2' OR TP-8 TO GROUND
PANASONIC TX SERIES: Press VOL (-) IN TV + OSD

SHARP: SHORT KAKI (PIN) PIN 6 AND 7 ON shortly MCU IC (TDA 98XXX). SHORT
BACK to exit

SHARP EXPRESSION: Connect the
Jumper J800
HAVE PROVIDED AND TWO jumpers in parallel.

CRYSTAL: POSITION STNDBY TV, press VOLIME VOLUME UP + DOWN ON TV
and hold

AKARI: Press SLEEP IN REMOTE + TV MENU

SAMSUNG: POSITION IN REMOTE Standby press: MENU - PSTD - MUTE - POWER ON
SAMSUNG PLANO: POSITION standby, press IN REMOTE: DISPLAY-MENU-MUTE-POWER ON
PLANO DIGITAL SAMSUNG HD100: Standby-DISPLAY-MENU-MUTE-POWER
OR: Standby-MUTE-1-8-2-POWER ON

.
Sharbysyd, FUJITEC, BOOMBA:
CHINA TV'S AND OTHERWISE USING THE PROGRAM IC TYPE LC8632XX SERIES: Press MENU IN REMOTE twice - RECALL (Q. VIEW) - MUTE.

TV CHINA OTHER (KCl, MITOCHIBA, BAZZOMBA) Press VOLUME IN TO TV NOL.push RECCAL ONCE IN REMOTE, press and hold VOLUME (-) along with the TV press RECALL BACK IN REMOTE .. the process to re-enter the sub menu next exits to the service menu.

AIWA: KEY MENU repairs ADA IN REMOTE FOR THE KEY IN VOLUME (+), loading first.

JVC: Press and hold BERSAMAAN OSD + MUTE
OR Press and hold OSD + PICTURE

HITACHI: Press and hold KEY AVDI TV, turn TV POWER SWITCH

SONY: Standby-OSD - 5 - VOL (-) - POWER ON

RCA / THOMSON: Press and hold KEY IN VT TV + POWER SWITCH ON TV

Some brands CHINA TV also have a menu button on the service in original Remote controller
.
Perhaps there is input from the other friends?

ZIC electronic
www.zicelectronic.tk

thank's

ABOUT MONITOR

2009-01-14T06:09:00.000-08:00

Monitor Repair
100 Merrimack Road, P. O. Box 1200, Amherst, NH 03031

603.321.0884, FAX 603.836.4436 , information@anatekcorp.com

QUESTION NO. P101503-4: Acana Peripherals 17s monitor FCC IIB-UA1. I need the value of burned R472, R473, R492, R493 and R495.

In the TVM schematic, I read R472 as 1K; R473 as 20K; R492 as 1M; R493 as 51K; and R495 as 10K. But these likely died from a bad flyback, T404, which would need replacing.

QUESTION NO. P101503-8: Dell 1028L monitor. What is the value of the ph-33d?

Without the component's chassis location number, the service literature cannot be referenced, but this may be a Philips fast-recovery type rectifier, BYD-33D, rated 200 Volts, 1 Amp. Possible substitutes for that one, are FR103, NTE552, or NTE574.

QUESTION NO. P100603-2: Viewsonic E70, burnt R457 resistor, next FBT. Need the value of resistor. Caused by s/c c445 connected to collector of FB transistor Q407.

There are many different Viewsonic E70 models, so without the 'VCDTS' model number, one cannot be sure which one is your model. However, the E70-3 version does have its R457 connected to the collector of Q407 via a capacitor (the other end of R457 goes to the base of PNP Q426, in that E70 version), and in that chassis, R457 is 1.5K Ohms, 1/2 Watt.

QUESTION NO. P100103-7: HP D2817A monitor. I need the value of R612 (surface mount resistor at the bottom of the PCB).

R612 is 270K Ohms; its size is larger than most SMD, could be a 2010 size (1/2 Watt).

QUESTION NO. P082703-4: LG Studioworks 99T monitor, Q520 is fried. Part reads K2379, seems to be Sanyos mosfet 2SK2379. Part is impossible to get in Germany, are there any equivalent replacements?

Although Sanyo's 2SK2379 is a logic-level gate Mosfet, in the LG 99T circuit, Q520's gate is driven by a 12 Volt source, so a standard-gate Mosfet like Fairchild's IRFS650B or SSS45N20B (or SSP45N20B with an insulator) might substitute for 2SK2379 in this location.

QUESTION NO. P092503-10: evokd1730 (Vs-7) monitor. I need reference Q 411.

Q411 is BU2525AF.

QUESTION NO. P082503-2: DA-456 CRT Monitor. I need the values of D406, R475 and R471.

D406=1N4148, R475=10Kohm 1/4W, R471=30Kohm 1/4W

QUESTION NO. P090403-6: Viewsonic G810 VCDTS 23852-6M monitor, horizontal scan is missing on the right side. There is distortion of the scanning lines before they peter out.

If there is a bad blanking pulse at pin 17 of IC601, on the CRT board, one possible way to restore the blanking pulse, is to change the value of R460 (100K) to 15K Ohms, to increase the base drive for Q4412.

QUESTION NO. P081803-10: LKOM L705 monitor is dead, power supply working, the led is on but no EHT. Collector has 50 volts of HOT transistor but no signal on base of the transistor. The chip is TDA9115 but no output at vertical and horizontal output sections.

.50V on the collector of the transistor is ok but if the base does not have it to turn it on the transistor will not conduct or turn on and that 50V will not go to ground or its proper place. As for TDA9115 no output [check for the correct voltage, ground, input to the unit]. Maybe something is loading the output of the TDA9115 down. If disconnect the output and check it again.

QUESTION NO. P090303-5: Acer 7276e monitor FCC JVP7276E. I need the value of C326 by the HOT and value and location of FR101. I was told to also check F701, F702, F703, F704, J013, R326, R328, R241, R329, C327, C304, D308, L304, ZD210, IC201, Q301, Q302, and Q316.

The Acer 7276e schematic shows C326 as 270 pF/500V. FR101 (2A) is on the CRT board, on the +85V line, located between pin 4 of the 5-pin plug M103, and C170.

QUESTION NO. P090303-3: KDS monitor FCC EVOKD-1910T, what is the part number for the FBT?

In a KDS AV-195T with this FCC number, KDS used FBT type Y265432B. Also, H.R. Diemen claims that their FBT type HR46206 is a replacement for Y265432B.

QUESTION NO. P082803-5: Nec MULTISYNC 95F monitor is missing R31A, I need the value.

Assuming this NEC is chassis N9902, R31A appears to be 0.33 Ohm, 1 Watt, fusible.

QUESTION NO. P082703-7: Acer 7178ie monitor FCC JVP7178ie. Arcing or sparking at the neck board between ground to either F1 or F2. The flyback has 4 wires output, one is High voltage, G2, the other two wires just guessing are either F1 and F2. Is the flyback (# TLF 063-11-39) defective?

Yes, arcing at the focus pins is a common fault from a defective 7178ie flyback. The Acer number for this flyback is 19.70033.011. The TLF063-11-39 is not the actual flyback number, that number is just for the focus pack.

QUESTION NO. P082503-4: Compaq V90 monitor FCC BR8SM-994. I need the value of burned R866.

R866 is 2.2 ohms, flameproof.

QUESTION NO. P082503-5: Samsung45bn monitor has a white screen but no picture. Checked the HOT, the two 220 diodes are ok. All main diodes are fine. Did in circuit testing of all small transistors, they show no shorts. Checked 53 volts 70 volt and 12 volt they are fine. The hot heatsink heats abnormally, nothing else heats up or blows. Switching on function is normal, I can hear is degauss and then back, the led also stays green.

I replaced 1rf 630 near the buttons and it fixed the problem.

QUESTION NO. P082203-4: Proview 986M monitor FCC IJE986. What are the values of Q663 and Q664? The board is version 200-100-PR98E rev: F3+.

Q663 and Q664 are shown as being either KSC5042F, or 2SC4686A, in the schematic. Possible alternatives are 2SC4630, or a 2SC3675 with insulator hardware added. B&D Enterprises (ww.bdent.com) is one source for these transistors.

QUESTION NO. P082203-3: LG Flatron 775FT monitor. I need the equivalent for FJAF6812 horizontal transistor.

Possible substitutes for FJAF6812 include 2SC4890, 2SC5411, BU4525AX, and NTE2365 with an insulator.

QUESTION NO. P082103-4: Sony/Sun gdm 20e20 monitor has a flickering picture, not horizontally centered and unstable vertically in a jumping back and forth fashion. All voltages are ok and no damage to pcbs can be found.

These sort of faults can be caused by a defective IC007 = CXA1908S, Sony p/n# 8-752-076-34, on the "D" board. Often, replacing this IC then requires DAS software re-alignment of the screen geometry parameters.

QUESTION NO. P081803-9: Samsung Sync Master 753S & 750s monitor. I need the part number of the FBT.

For Samsung chassis DP17L, two FBT's are listed, FEA831 (BH26-00035A), or FQB17A001 (BH26-00026A). FEA831 and FQB17A001 should be similar, or the same, for they cross to the same HR Diemen equivalent, HR46203. For Samsung chassis AQ17LS, the FBT is listed as LCE-CF1781, Samsung part code BH26-00109A.

QUESTION NO. P71103-4: NEC V520(B) monitor without FCC #. The power is ok and LED indicate green but no display. No HV and relay does not click. Checked HOT it's ok. Checked all resistors, diodes and transistors at power supply and deflection area and looks all ok.

Try resoldering tube connections, especially G2.

QUESTION NO. P72503-1: Optiquest V95 Model vcdts2183 monitor FCC GSS1900 the horizontal sync is way out, the picture is only 4 inches wide. I think LM1292N IC is bad but can't locate one. I used to purchase IC's from LJ but his site is no longer there.

LJ Enterprises' new web address www.ljecc.com/

QUESTION NO. P70803-3: Sony CPD-E220 monitor power supply and HV are ok but low G2 and switches on with signal then shuts down after 30 seconds steady orange flashing led.

These units are lemons. Sony will replace between certain serial numbers because they cannot supply eeproms & microprocessors. Do not try to fit blank eeprom or it will blow in a big way.

QUESTION NO. P73103-6: Sampo km718dt monitor chassis c718. I need values of R509 and C503.

In my Sampo KM-718 manual, R509 is 22 Ohms, 2 Watts, and C503 is 0.047 uF, 400V.

QUESTION NO. P72903-9: KDS monitor FCC EVOKD-1910T. I need substitute part for transistor A1281 at location Q818.

A possible substitute could be Fairchild's FPN660, but its pinout is EBC, instead of ECB, so its leads would need to be inserted correspondingly. Mouser Electronics (www.mouser.com) is listing FPN660.

QUESTION NO. P72103-10: NEC multisync FE700+ monitor, all digital alignment controls work except width and pincushion. If problem is processor please mention source for same.

In many digital monitor it happens that there width and pincushion control doesn't work other all controller functioning ok. This problem is due to the Transistor which control the Horizontal Size. mostly it is located on the center of the circuit board. Look for the Transistor B649A and replace it. Some time there are more then one so if there are then check them all and replace the defective one.

QUESTION NO. P72103-9: KDS Multiscan color monitor FCC EVOKD-1910. is dead, components are burnt. I need the value and part numbers of Q424, Q818, IC 403, R424, R466, R468, R462.

I have EVOKD-1910T here, I think it is quite similar so I'll try to help a bit. Q424 is 400V N-Channel MOSFET IRFS730, IC403 is SMPS Controller KA3842B (the same as IC404 you have there), R424 is 3600 ohm, R468 is 1 ohm. Have you check yr flyback? I could not locate Q818 (Q810?). My R466 and R462 are burnt too, waiting others to help.
R466=1k ohms 1/4w
R462=10 ohms1/4w.

QUESTION NO. P72903-8: HP M70 D5259A monitor, chassis D5259-60050, I need value R451

HP has installed several different chassis in model D5259A, but if yours is a Tatung C7B chassis, the schematic for the Tatung C7B shows R451 as 1.5K ohms.

QUESTION NO. P72503-7: Viewsonic P810 monitor is dead. I replaced a shorted horiz. output transistor. It is still dead but now there is a ticking noise from the power supply.

Viewsonic has made several different versions of P810, with different FCC and VCDTS numbers, so specific tips cannot be given. However, in general, when HOT's short in these, the B+ regulator FET (usually a P-channel FET) is also bad. Sometimes also, the damper diode, and/or diodes on the SMPS secondary 200 Volt rail, are bad, or fuses or fusible resistors in the B+ supply line are open. Also check the base drive circuit components for that shorted HOT. In some models, bad FBT's are common.

QUESTION NO. P72803-3: Viewsonic G790 model VCDTS21385-1M monitor. Initial fault was arcing on the FBT. I replaced it (FEA661). No arcing but no operation either. Q303 (2SC5331) and Q103 ( IRF740) were shorted. Q303 is the HOT ;Q103 is a regulator in the HV circuit. Replaced both and tested again. Q303 shorted again but not Q103. The HVOPT (Q105, C5124) never blows. Q601 (the B+ regulator in the HOT circuit) was tested OK but replaced anyway. Also tested damper diode D304, D317, and R334. What is causing Q303 to short?

I have located the culprit. It was D123 (shorted) in the G1 circuit output of the FBT. It looks like the load on the HVOP was causing the B+ on the HOT to wildly fluctuate and take out the HOT.

QUESTION NO. P72503-3: Apple M6496 Studio Display monitor no FCC or model number, made by LG Electronics. There is no B-plus to the horizontal output transistor, Q707. I have carefully checked the board with a magnifying glass.

Check that B+ voltage passes through P-FET regulator Q404. Also check C411, ultrafast D405, and damper D714. If there are no pulses on the gate of Q404, check R439, zener D404 (18V), and ascertain that horizontal drive is being provided to Q404's gate from IC701.

QUESTION NO. P72503-5: HP D2837 monitor, when the power is turned on, the unit draws 50 watts constant, the raster pulsates about 4 times per second. The pulsating starts in the center and expands outward about 1/2 inch both horizontally and vertically. The B plus voltage holds steady at 88 volts. The High Voltage "vibrates" at 27.5

Assuming this HP model is FCC#A3LCKB722, I would check C517 (3.3 uF, bipolar); the schematic lists it as 50V, but sometimes the manufacturer has skimped on this one's voltage rating. If C517 is OK, then check the flyback.

QUESTION NO. P72303-10: AOC monitor spectrum 4v has power green led but has no display.

Check diode near power supply, damper diode (her 303,stpr 303).

QUESTION NO. P72403-3: Dell p991 19 Sony monitor, I am measuring 30 KV for high voltage and unless I lower brightness and contrast down to 30% of full the monitor goes into shutdown. How can I lower HiV to 26-27 KV? When I pull crt socket off the tube all is OK, so I'm guessing its excessive beam current.

According to the manual, HV is adjusted to 27KV by RV901 (on D board, under a cover and RTV silicone). Also, check components in the HV regulatory circuit (R924, R925, RV901, IC901, and FBT T901), and the HV and ABL protection circuits (R917, R918, R920, R921, R923, R932, R933, R191, R1004, R1006, C920, D911, D912, D915, D917, IC901, T901), in case any are off-value or faulty. Note, Defective FBT's (Sony p/n# 1-453-317-11) are one cause of 30KV HV in this model.

QUESTION NO. P72403-9: Samtron SC 726GXL monitor FCC A3LCMH737. I need value of C506

According to the SC-726GXL manual, C506 is a metallized polypropylene film capacitor, 0.33 UF, 400 Volts, 5% tolerance.

QUESTION NO. P72303-3: Proview px561 monitor. I need the reference of the transistor Q630 .

Q630 is IRF634, or an equivalent type. IRF740A can also substitute. If Q630 is bad, also replace C635, and carefully check D632 for reverse leakiness.

QUESTION NO. P72203-5: Compaq MV520 monitor displays bad horizontal width problems. Can adjust vertical ok using setup adjustment controls but not horizontal width or position. I have changed IC U401 and U2.

Compaq MV520 has several chassis versions, with different CO-xxxxx model codes, but if your version has a dual diode at D801, check it for bad solder, and for reverse leakiness in the diodes. If D801 has problems, also check FET's Q802 and Q805, in case D801 has damaged them.

QUESTION NO. P70803-9: Philips 107E20/00Z monitor, I need type of power mosfet in power supply section part number 7101. It is some ST microelectronics type but cannot read because burnt badly.

The original part is SSP7N60A. A substitute part is IRFB9N60A. The Philips part number is 9322 135 00687.

QUESTION NO. P72103-1: Dell GDM-5001PT monitor does not respond to the controls for vertical center and vertical size, also has pincushion on both sides. How do I reset ic007 in the D board, CXA-2043Q like Samsung TV's?

This Dell is a Sony, not a Samsung, chassis. The symptoms sound more like a defective IC007, than one that needs realigning via Sony DAS software. If you replace IC007, beware of lifting the fine PCB traces. Sony distributors have CXA2043Q, as Sony part number 8-752-078-46, or MCM Electronics may have the generic part available.

QUESTION NO. P71703-4: Compaq 150 Model 445A monitor, Chassis CM0200, FCC A3KM050. Phillips Manufactured, but no help there. Of course Compaq recommends replacement. R3423, R3424, R3426 burned. Need values. Vertical IC shorted after powering it up with the cable connecting the mask to the CRT Board unhooked. (Looking for loose solder connections). Anything else I should be looking at? Vert IC replaced, of course.

In my Philips manual for CM0200, R3423 is 220 ohm, 0.33 Watt; and both R3424 and R3426 are 4.7 ohm, 0.5 Watt.

QUESTION NO. P71503-1: Viewsonic GS815 monitor, I need the part number of the vertical IC.

The vertical IC is TDA8172; also check nearby electrolytic capacitors for possible damage from incorrect supply voltages.

QUESTION NO. P71003-7: LG Studioworks 74m monitor, FCC BEJCM710. Initial problem was no go with ticking sound. Checked H.O.T which was ok. Replaced Flyback Transformer, and monitor now operates BUT only when the video cable is not plugged into the rear of the monitor. As soon as I plug the cable in the monitor goes into standby mode, and B+ goes high.

Check the B+ coil and capacitors, coil is to left of fbt near p/supply inspect closely for burning and test value, check the fet also. Every now and then one of these will do more damage when the fbt goes, some only the fbt.

QUESTION NO. P71003-8: Samsung 550S (DP15LS) monitor, I cannot adjust the colors, no screen pots(red, blue, green), no driver pots, no DAS connectors.

Color adjustments on the DP15LS model are done with Samsung's Softjig software, and the Samsung Softjig interface assembly (interface board Ver. 2.0, and signal cable).

QUESTION NO. P71003-4: HP D2825 monitor FCC 7154E. Display was split into two parts horizontally and about 3inch diagonal bar was in the center of the screen. I checked H stage. I changed H.O.T (BU2520AF), now Q317 N CHANNAL F.E.T (K2161) is blowing. I replaced it with IRF 740 but, its also over heats & seams to be burned. Also need value of zener diode D316. Another problem is when connect the Vga cable, the front panel controls does not work. When Vga cable is disconnected the front panel controls (Bright, Contrast, Size, etc) work.

First change ceramic cap C335 (220pF/2KV), by the flyback. If R214 (15K) is bad, IC201 (TDA4858) is probably also bad. Since Q317 repeatedly burns, also check if coil L304 has burnt or shorted windings, or has lost inductance (L304 should retain at least 0.7 mH in inductance), and check zener D316 (24V), ultrafast diode D317, and C326.

QUESTION NO. P71003-3: Compaq mv520 monitor has 240 volts (Australia) in to board power supply but nothing else to the rest of the board, front led flashes dimly.

Replace Q505 (IRF630) FET mounted on FBT cage. Dry joints on FBT and C513 (100uF200V) swollen. But any heavy drain on the supply could cause this.

QUESTION NO. P70903-4: Dell P1110 monitor, G2 dies out after 1 to 2 hours, spraying coolant on Q406 brings back the picture. Q406 is surface mounted with no visible markings, what is the generic part #?

In the Sony Manual, Q406 is either a Matsushita 2SB709A (in the schematic), or a Toshiba 2SA1162 (in the parts list); these two PNP transistors have similar specs. The parts list shows Q406 as 2SA1162-G (G = gain bracket 200-400), and Sony p/n# 8-729-216-22.

QUESTION NO. P70903-5: Digital CMC-1511BW/SM monitor Chassis CMC-1509B was dead. Replaced damaged transistor (FET) 2sj449 (part #Q133) and main H-Out transistor 2sc4924 (part #q500). Now monitor is on but is not showing any picture signal coming from the VGA of the computer. I checked the vga with another monitor which worked fine. In the standby mode some tick tick sound coming from the relays RL501 and RL503 near the H-Out transistor and in full working mode the noise coming from the flyback or near around the flyback.

With Q133 and Q500 bad, I would also check R150 (10 ohm); C539; ultrafast rectifier D132; and the rectifier for the 200V secondary supply off the SMPS transformer.

QUESTION NO. P70803-10: Tatung C7BZR monitor. I need a substitute for a dmv-32 or dmv-56. Its a damper/modulation diode pack in a transistor case.

Possible substitutes for ST Micro's diodes DMV32B and DMV56 include Sanken's types FMP-2FUR, FMQ-2FUR, FMT-2FUR; also, Fairchild's type FFPF60B150DS.
DMV32B diode is available in UK from http://www.dalbani.co.uk/index.php

QUESTION NO. P70703-4: IBM 6556-03N monitor Sony chassis SCC-LO7G-A raster is tearing top 1/3 of screen, improves as it warms up. Worse in high resolution modes.

Check C575; also check C573, since the problem is worse in certain modes.

QUESTION NO. P70703-2: AOC 7klr monitor. Need value of r626, burnt beyond recognition.

Value of R626 is 820E 1w. After replacing screen shows thin lines and foldover on top. Changed TDA 4866 and electrolytics around this IC. Fixed the problem.

QUESTION NO. P62303-10: Kimodo K7 Sceptre monitor is dead after not being used for three months. No known damage nor surges. PLED blinks short on, long off.

Next time include size, proper make, model, year, FCC ID, UL and CSA. Your unit is a 17" Komodo (Sceptre) computer monitor model P773, part number:K73P, year: March 10,1999, FCC GKRM773,UL:1K97. Your unit like 70% of all of those chassis have a defective T802=FEA632 (Sampo)=flyback which takes out the HOT,Q503=2SC5387 which could be subbed for ST2408HI,BUH1015HI,BU2508AF or 2SC3886./

QUESTION NO. P60503-1: Compaq mv520 monitor. What is the correct line output transistor fitted to this chassis?

Line output transistor is BU4508AX

QUESTION NO. P52903-7: AppleVision 850 Monitor was originally intermittent, when display would disappear. This seemed to be a heat-related problem, as monitor would power up normally after letting it stand for some time. Disassembled monitor, and resoldered some suspect joints. This fixed the intermittent problem. Monitor then lost display, with no obvious signs of overheated components. Now when powered up, and video signal asserted from computer, power LED blinks ORANGE at about 2Hz. Are there any points where critical DC voltages can be checked?

Check vertical IC and caps. If I remember correctly pins 6 & 7 or pins 5 & 7 will short.

QUESTION NO. P61903-10: Apple Multiple Scan M2494 FCC AK8M2494. About 10 ~13 seconds after turning on the unit, picture gets so bright (with retrace lines) causing the unit to shut down. All main voltages test ok; G2 voltage is about 1kv at the source, but seems to have an automatic G2 regulation circuit at the CRT module.

Check tube socket connections for dry joints. These units lift smd components on video board near the heat sink component side. Also check microprocessor output.

QUESTION NO. P61703-2: Dell D1626HT monitor (Sony chassis SCC-L04K-A) with no red color. After check and replace de IC403 (FA4111) without result, I think the problem can be caused by malfunction of IC402 (M52722P). I haven't any datasheet of M52722P and I can't find in Mitsubishi Semiconductor site.

In the schematic, the Red input to IC402 is to pin 17, and is about 2.8V. Red drive (pin 18) is about 3.9V, Red hold (pin 35) is about 4.4V, and Red Output (pin 37) is about 2.7V. Vcc for red (12VDC) is IC402, pins 16 and 36; red ground pins are pins 24 and 29. Red output goes to transistor Q101 (PNP, base is about 2.8V, emitter is about 3.5V), then continues on to input at IC403. If another IC is needed, IC402 (M52722P) is Sony part number 8-759-468-63.

QUESTION NO. P61703-3: Nokia 447x258 monitor. Need part number for T27 FET.

T27 is IRF9622, a P-channel Mosfet; an IRF9620 could substitute.
Top

QUESTION NO. P61703-5: Acer 7156e monitor, JVP7156E totally dead. Checked all resistors, transistors, diodes and caps in primary side. Replaced ic uc3842 but did not help. When switched ON, main capacitor still holds current. Double checked all component in primary and secondary.

Unfortunately in this monitor a charged cap does not mean much. The main drive is not the IC you changed but IC701 via an opto coupler so if there is a short say on the flyback IC701 will lock down and C612 will be fully charged. I then suggest check the usual output transistor etc and ring the flyback if you can.

QUESTION NO. P60903-2: Hyundai S560 monitor has narrow screen. I need the value of burned Q312, I can make out K D2.

Q312 is D2061

QUESTION NO. P60603-3: Samtron 750S or 753S monitor with Eprom IC 24C04, first MENU never use to come when I replaced 24C04 (ST make China) first instant it worked correct, but after switch on again the width becomes less, I tried with next IC, again the same thing, I tried with 24C08 of other make same thing again.

After replacing the eeprom you need to do an alignment with Samsung's Softjig software and interface. After doing the alignment, save the data to the eeprom.

QUESTION NO. P61203-9: Samsung Syncmaster 15GLI monitor. I need values of R609, R610, R616 & zener diode D610.

R609=0.18ohm 1W, R610=1K ohm 1/6W, R616=15K ohm 1/2W, D610 = 16V zener( UZ-16BM).

QUESTION NO. P61203-8: Compaq V75 model 623T monitor. I replaced FBT (FEA662), Q831 (BU2520?), R866 (2.2 Ohm 1/4W). I want to be sure about Q831, is it supposed to be a BU2520DF (with damper diode) or BU2520AF (without damper diode)?

The version of BU2520 used for Q831 is BU2520DF (contains a damper).

QUESTION NO. P61203-10: HP D5259A monitor Chassis C-711 has a horizontal line across the screen. Resoldered cracked solder joints at I602 (vertical IC), still horizontal line. R618 is fried, what is its?

R618 is 1 ohm. Also check if the vertical chip is damaged.

QUESTION NO. P61203-2: Philips 107e monitor, power supply contains smps ic which is TEA1504. I need a replacement from other manufacturers.

That is a specialized chip made by Philips so forget about other makers.

QUESTION NO. P60503-8: NEC P1250 monitor with vertical field collapse. i.e. a horizontal line is visible in the center of the screen. I have replaced the IC104 but the problem remains.

No vertical deflection has a specific troubleshooting procedure. 1st. Check vertical yoke winding connections on PCB and measure. resistance of winding with yoke unhooked from PCB (expect 8.2-11 ohms). 2nd. Locate B+ pin of Vertical Output IC and check for DC voltage typical 25-27VDC. 3rd. Locate vertical sync input pin of OUTPUT IC and check for sync in lack of sync means VERTICAL drive missing from further back in circuit
typical cause is 2.2 uf cap @50 vdc series coupling. 4th. Look for a 100uf cap at cathode of B+in diode negative will go to pin labeled PUMP or RAMP if this cap has low ESR no vertical defl will occur and output DC reference voltage will be 50-70% of documented value. 5th. Some vertical circuits use a series defl cap in the range of 1000-3300 UF. if this cap is open no deflection will occur. Other variations use less than 1 ohm resistors from NEGATIVE of this cap to ground. Poor solder (heat stress) oropen resistors take cp out of return line and thus NO DEFLECTION.

QUESTION NO. P61003-10: Proline 7G1r monitor FCC ARSCM7850 was DOA, Q811 was faulty and R8090 was burnt, I guessed at the value of R8090 to be approx 190 ohms, I replaced these components, after switch on the resistor starts to burn again, the whole area around these components and the KA3842 IC, was stained, almost like sea air corrosion, but only in a confined area.

In an AOC-brand model with the same FCC number, R8090 was 22 ohms, 2 Watts. Besides checking Q811, other components that might be checked are Q812, Q823, C827, C828, C837, D806, D807, and check for any shorted windings in T804. The KA3842 IC may also have been damaged, and try to clean the stain off the PCB.

QUESTION NO. P60903-9: EMC Multisystems SA-770 monitor FCC IJE765 has a shorted Q630 (IRF634A). What other parts should I check or replace along with this mosfet so it doesn't short again?

Check the flyback transformer and output transistor, one or both are faulty.
Along with Q630, the ultrafast rectifier D632, and electrolytic C635, should also be replaced, as they are usually marginal or defective, as well (may not test totally bad). It has been suggested to reduce the value of C635, from 22 uF/250V, to 10 uF/250V.

QUESTION NO. P60603-5: TVM AS6S monitor. I need the value of R473.

R473 is 20K ohms. When R473 burns, this is likely caused by a defective flyback transformer.

QUESTION NO. P60603-7: Nec pn7701 monitor with open R304. Can't read the color code.

R304 is 3.3 Ohms.

QUESTION NO. P60503-5: Daytek DT-1501BA1 monitor FCC DTSCMC1501BA has horizontal line/squashed picture center of screen. Resoldered five bad solder joints on vertical deflection circuit (TDA1675A) still have horizontal line.

Replace that IC. It is a common failure in other monitors. Also the cause is probably bad caps (4) connected to that IC. Then replace the b+ resistor (low value) connected to pin 14 which also has one of the caps on it.

QUESTION NO. P60203-3: KDS VIEW K770 monitor, the horizontal output transistor (BU 2520-DF), C499 (220P 2kv) & R457 were burned. I need the value of R457.

This KDS model is a Jean chassis. R457 is 680 ohms, 1/2 Watt, and you probably meant disk capacitor C449, not C499. Also check Q426 and Q429 for potential damage.

QUESTION NO. P50503-1: I need the vertical ic number for a Samsung Syncmaster 950p monitor.

If this Samsung Syncmaster 950p is a PG19LS, then IC301 is TDA8172.
Samsung shows multiple chassis for this model. AQ19 IC301 as a KA2142, PG19 IC301 as a KA2142.

QUESTION NO. P52903-4: AOC 7Glr monitor. I need the value of R913 and R914.

R913 4.7K 5% 1/4W, R914 47 ohm 5% 1/4W.

QUESTION NO. P52903-1: HP D2818A monitor. I need the number of Video IC IC 102 Missing (12Pin IC).

IC102 is LM2427.

QUESTION NO. P52703-3: HP d2825 monitor cannot adjust horizontal size and has pincushion problem. Replaced TDA4858, checked many components. Other functions o.k.

Check Q302, Q303, R302, C316, L303, and D308. The semiconductors might be leaky, but not totally shorted.

QUESTION NO. P51903-5: LG studio works 775N monitor, is too dim. I checked power supply voltages they seem ok. There is no burnt resistor or blown capacitor.

More than likely your CRT has low emission. Had a lot of these fail at the end of the 3 year warranty. LG ran out of replacement CRT's in Canada.

QUESTION NO. P52203-2: Goldstar (LG) 1465DLs monitor FCC BEJCH480; Chassis: CA-32. R726 burned (need value for replacement), also C723 (need value and specifications) seems burned too, both related to the FB. If both would be replaced, will they burn again?

R726 is 10K ohms, and C723 is 1 uF/63V. These were probably burned by a defective flyback, so the flyback would also need replacing, or they are liable to burn again.

QUESTION NO. P42803-2: Acana Peripherals 17s monitor. I need the value of burned R495 and the cause.

If this Acana 17S is FCC# IIB-UA1, the schematic for that chassis shows R495 as 10K ohms. Since this R495 connects to the flyback transformer, a defective flyback might have burned R495.

QUESTION NO. P51603-1: HP d2827a monitor, the hot has blown and I replaced it with a Bu2520df. The ht is ok. When switched on the relay goes on and off with a tweaking sound. All voltages are correct with the hot disconnected. Is the bu2520df tre right transistor?

If this HP is a Daewoo 518X chassis, Daewoo's schematic shows BU2520DX, which is the same as BU2520AF electrically, except a different case style, so a BU2520AF should work in that chassis.

QUESTION NO. P51603-9: Apple iMac 233 Mhz monitor. When powered on, it goes through a procedure of bringing up the computer section of the iMac and then the monitor. When it gets as far as firing up the monitor board, there is a repeated snapping sound for between 1 and 5 seconds (I can see a small blue flash somewhere near the Motorola control chip), and then powers off and does not come back up unless left for an hour or so. I can't see any burnt components on the board, but the top of the Motorola IC (LGM871-010/AYJ) appears to have heat damage (it's not a continuous black color on top like most ICs). I have found only one supplier for the IC and it's $49 + shipping to the UK, so I don't want to replace it unless I know it is broken.

The most common fault is shutdown due to an arcing flyback transformer, a common fault in the 233 MHz iMac. LG is one source for flyback 6174Z-1003G, or in some regions, an H.R. Diemen equivalent may be easier to obtain.

QUESTION NO. P51503-7: Sony cpdg500 monitor, brightness too high with all controls set at lowest possible. Image is stable and in focus, all syncs and geometry ok. Suspect defective ic in brightness circuit, possible voltage too high. No adjustments internally, all micro-controlled.

Assuming that this is a circuitry fault, rather than a DAS software issue, the problem might be, that the CRT cathode voltages are too low, or the G2 voltage is too high. On the CRT board ('A' board), check if the cathode voltages (CRT pins 7,8,9) are in the 80 to 100 Volt range. If these voltages are too low, it may indicate a bad IC403 (FA4301). The G2 voltage (CRT pin 10) should be roughly 522 Volts at the CRT. If G2 is much higher, check the G2 circuit, involving transistor pair Q406 & Q410, run by IC405 (pin 7), under control from IC404 (pin 14). Otherwise, try a DAS alignment.

QUESTION NO. P41703-1: Proline C409A monitor FCC IQX97C1455 is dead. R122, R121, R130, Q101 and Q704 are all burned beyond recognition. I need the values. All other components are tested and seems OK.

R121 is 220 ohms, R122 is 120 ohms, R130 is 10 Kohms, Q101 is 2SK2545, and Q704 is 2SC5339. R121 and R122 form a voltage divider across R120, which is 0.47 ohms, and is the source return resistor for the MOSFET switch, Q101. The junction of R121 and R122 goes to R110, 1000 ohms, which then feeds the current sense input of U101, which is a KA3882 PWM controller. It seems unlikely that R121 and R122 could be burned unless R120 is open, and even then I would expect to see R110 burned unless there's a short on the board.

QUESTION NO. P51203-7: Gateway EV700A monitor FCC BEJCB775B Voltage cycles. 5 Volts okay but all others cycle. I replaced FBT and IC923, IC925.

Also check IC304, the 8 Volt regulator IC on the CRT board, and its solder connections.

QUESTION NO. P50903-5: Apple IMAC 266 Model M4984 monitor. Is there an alternative flyback to 6174Z1017D (LG)? Local LG list only 1017A or E. The A is not a cross but the E may be. Perhaps the E is an upgrade?

In iMac M4984, flyback# 6174Z1017D can be replaced by LG FBT# 6174Z-1003G.

QUESTION NO. P50803-5: Proview pk-986 monitor FCC ije986. I need the value for RT502.

RT502 is an inrush-current limiter whose ohms rating is about 8 ohms at room temperature. A possible substitute might be a Thermometrics type CL110.

QUESTION NO. P50203-9: Gateway2000 crystal Scan14 Mon014006A0WW monitor has very poor image, display is too dark. Adjusting the screen causes the focus enhanced but still blurry. I checked Q413= BU 2508DF it's ok.

Check the CRT for poor emissions (dying CRT).]

QUESTION NO. P50503-8: Optiquest Q71 monitor powers off immediately. I need the specs on burned voltage regulator Q429. The board is version VCDTS21348-2M.

Q429 is 2SC5248, rated 160 Volts, 1.5 Amp, 20 Watts, 150 MHz, DC gain 60-200, Cob 20pF, TO220F case. A 2SC3298 also might substitute for 2SC5248.

QUESTION NO. P50203-2: Proview pk-986 monitor FCC ije986. I need the value for R502 and Q502.

In the schematic for IJE986, Q502 is a 600 Volt, N-channel Mosfet, such as 2SK2141, 2SK2645, STP7NB60, or IRFBC40; (insulator added as required). R502 (47K) is shown in this schematic as being left open (not installed).

QUESTION NO. P42903-5: Samton 45bn monitor. In front panel buttons h size, pallelogram button and pinamp buttons are not working. I replaced DM024 ic, still no change.

Check if ultrafast diode D414 is leaky in reverse, or shorted. If D414 is not failing, then check Q412 and its associated components.

QUESTION NO. P42503-2: LG Studioworks 795SC monitor Chassis CA-55, the power supply is bad! The TOPxxx and mosfet are burned. Is there an replacement for this TOPxxx?

IC903 is TOP223Y; an LG/Goldstar supplier may be able to provide this IC, as LG part# 0IPF223000A. L.J. Enterprises (www.ljecc.com/) is also listing TOP223Y, on-line.

QUESTION NO. P33103-1: I need to open the service menues of the Philips Brillianc 109p and a Nokia 446 pro monitors.

40 sites containing tv, vcr & computer monitor EEPROM service mode access: http://the-hideout.net/techtalk/phpbb2/viewtopic.php?t=47

QUESTION NO. P40103-9: Compaq v410 model 304U monitor FCC BJMC4A Original problem: LED on the front would just flash amber never turned green. Replaced shorted HOT (C4916) with one that had the same specs with a slightly lower current rating. Now it powers up and displays a picture but I cannot get the horizontal adjustment far enough to the right and it starts to squish the picture the farther to the right I go. Also the new transistor runs extremely hot.

Original HOT 2SC4916 I replaced with 2SD1876 which according to the NTE cross are near identical except for the collector current. (10 amps versus 4 amps). I was expecting it to work but degrading the life of the transistor. I have now replaced it with the correct transistor and everything works fine. The NTE cross specs must be inferior or the max. collector current is more important then I imagined.

QUESTION NO. P32403-3: Viewsonic G790 monitor has no red, green and blue normal.

Trace the color signals to the CRT base PCB and swap two of the colors round (Hopefully the colors will be marked on the PCB). If you now have RED, the tube is OK but the feed is faulty and vice-versa.

QUESTION NO. P42303-2: I need the Sony manual part number for a Dell P992 monitor.

The number on the P992 service manual is 9-978-704-01.

QUESTION NO. P42203-2: LG 910sc monitor. I need the value of burned FET Q901.

The LG parts list shows Q901 as 2SK2843, which is a Toshiba 600 Volt, 10 Amp, 45 Watt Mosfet. 2SK2843 is listed as LG part no. 0TF284300AA.

QUESTION NO. P41703-4: Dell P1110 monitor (Sony chassis SCC-L22D-A), the CRT heater voltage is muted. Applied external CRT filament supply, the picture appeared, but the screen is too high.

Most times in the case of the missing heater voltage, there is usually a dried out electrolytic capacitor or bad inductor coil in the circuit. Check for one or the other. If the capacitor you find is suspected to be bad, you can parallel a known good one across it. If it is bad this should restore heater voltage somewhere around 7 volts DC.

QUESTION NO. P42203-6: Optiquest Q71 monitor FCC GSSJ 17001 came from another shop. I replaced the shorted HOT. It is working fine now but too wide. Width control does not work. Pincushion ok.

Check or replace D422, Q429, and Q411.

QUESTION NO. P42203-1: Philips 15A12F monitor Chassis CM1200. Need value of burnt R3426.

R3426 is 4.7 ohms, 1/2 Watt.

QUESTION NO. P41703-7: IBM 6558-03n monitor (Sony scc-l04h-a) shuts down deflection code. Need part # or ic # for ic 702(vertical) which is missing.

The Sony schematic shows IC702 is LA7841L also check R720 1R 1/2W flame proof resistor and R727 1R 1/2W Flame proof resistor.

QUESTION NO. P31903-2: Mag XJ717 Monitor. The HOT shorted, but someone seems to have put in the the wrong type. I need the correct number of Q112.

Q112 is a BU2532AL.

QUESTION NO. P41503-10: IIyama Visionmaster 400 monitor powers up without a signal connected and shortly goes into power save as expected but the power supply trips out when the PC / test card generator is connected. A chirp is heard just before the power supply shuts down. If the monitor is powered with a signal connected, it shuts down instantly and won't power up again unless left for a few minutes. I changed the FBT and the B+ smoothing caps to no avail.

To answer my own question, I eventually found it necessary to change all the low value electrolytic capacitors (about 8 in total values between 1 and 100uf) in the primary side of the power supply. These capacitors checked okay but proved to be faulty by replacement.

QUESTION NO. P41503-4: I need a Sony part no. ( 8-xxx-xxx-xx ) for a Sony IC (CXD9164M) from a Dell P992 monitor.

The Sony manual lists IC003 (CXD9164MTR) as Sony p/n# 6-700-723-01. (Not "8").

QUESTION NO. P41503-9: LG Studioworks 440Si monitor. I need the value of fried R843 near flyback.

R843 is 12K ohms; check if a defective flyback had burned R843.

QUESTION NO. P41503-3: Samsung Syncmaster 15GLi CMB5477L monitor was dead. I replaced faulty Q503, 2SC5148 with a 2SC4747 and the faulty Q505, IRF740. I need the value of burnt R507 (in series with the Collector of Q503).

R507 is 1.8ohm 2W. Also check C504 22uf 250V and C514 47uf 16V.

QUESTION NO. P41403-1: Markvision VC1450D model DA-456 AA monitor Chassis 2970005101. I need the value of burned C441.

If its FCC is H79DA-456, a different brand, with this FCC, has a C441 of 220 pF, 2KV.

QUESTION NO. P41103-3: Acana Advance 17S monitor FCC IIBUAI, I need value of R425.

R425 is 10 ohms, 2 Watts, in the schematic for FCC# IIBUA1.

QUESTION NO. P41003-2: Sony 200GS monitor has bad distortion at top of the screen. On cross hatch pattern, instead of vertical lines, it has vertical zigzag lines on top with an approximate length of 1.5cm in each line.

Try replacing C573. If C573 is no help, try other 250V capacitors, C572, C575, C524.

QUESTION NO. P41003-1: DigiView AT398 monitor has a horizontal line across screen. ICB02 is burned. Can only make out A8172. Believe this is the vertical amp. I do not see any other part that look overheated.

This is a TDA8172 also check the diode between pins 2 & 6 and the capacitor between pins 3 & 6 and any resistors in the supply rail 2 and maybe 4 if it is supplied with + & - rails
The full number is TDA8172.

QUESTION NO. P40803-7: Viewsonic P810-1M / 21HV8SA monitor FCC GSS21001 - Need part numbers/subs and source for D602, D902, D905, R919, and Q902. This is a repair for the common problem of leaking C852 causing shorted D602 and subsequent damage. I am also replacing C852, C601, R602 as well. Any other components affected outside of these?

When you replace C852, also repair any damaged PCB traces under C852. D602 = MA167 (similar to 1N4148 or NTE519); D902 = MA4270NH (27V, 0.4W zener); D905 = MA4051NM (5.1V, 0.4W zener); R919 = 390 ohm SMD; Q902 = UN5211AI, an SMD digital transistor (SC-70 case style) with an internal 10K/10K resistor divider. If D905 has gone, I would be concerned about AC voltage continuing past, and possibly also damaging R917 (1.8K), R918 (100 ohm); IC850; and the processor IC901.

QUESTION NO. P40703-8: Sony CPD200GS monitor has a normal picture on the bottom half of the screen, but is blank on the top half. I have not located the vertical output IC. Does the vertical IC drive the yoke directly, or is there a transistor stage involved? This looks like some kind of push-pull output failure.

IC401 drives the vertical yoke directly. This IC uses dual +/- 15 Volt supplies, so see if either supply is missing, or if either has a bad filter cap; C401, off pin 1; C404, off pin 6. If the supplies are both good, check IC401 itself, and associated components.

QUESTION NO. P40403-6: Compaq Pe1120 monitor, the horizontal op and driver j449 was shot. I need info on D310 (PH33D) which is broken in fragments.

This device is a Philips BYD33D rectifier, rated 200 Volts, 0.7/1.3 Amp (12A peak); Vf < 1.3V @ 1A.If; Trr < 250 nanoseconds; soft recovery. Some possible substitutes include FR103, HER103, NTE552, and NTE574.

QUESTION NO. P31903-10: Acer 7299c JVP7299c monitor, found shorted Horiz. output BU2532AN, replaced with 2SC3997 scoped output, pulse looked ok for 3 sec. blew output. Is this a suitable replacement? Drive circuit?

No! Fall time of 3997 is 0.2us and the 2532 is 0.06us. You may wish to check L304 & Q321 possibly burned & shorted. Check all coils and FBT these Acers are boomerangs. They usually come back if you do not check everything.

QUESTION NO. P32103-8: Hyundai DeluxScan 17B+ Model HL-7870A monitor is experiencing brightness problems, constant 'dimming' then 'brightening' of display. I replaced defective R502 and R503 but that did not work.

Resolder G2 on Tube board and all the other tube connectors.

QUESTION NO. P32703-3: Viewsonic 21PS monitor chassis HV4S/H FCC GSS933006 is dead, LED comes on for 1 second then goes out. I replaced C839 and repaired arced trace under it and checked C867 it was OK. Repaired a few bad solder joints, one was cracked at Q583. It powers on now except HV. Degauss works, tube heater works and menu controls will turn led green as will a PC when it is connected. There is power to R588 and R589 but no power to R545.

The degauss cable around CRT hits a capacitor on the front of the board and brakes the solder joint.

QUESTION NO. P33103-3: Sony GDMF500 monitor with drifting focus and intermittent retrace, all main supply voltages checked ok, suspect focus divider.

Before replacing the CP701 focus module, rule out if the CRT has an internal leak-path, which may occur in this model. Detach the CRT board from the CRT, and check with a high-voltage probe, to see if any voltage is leaking into the CRT's focus pins, etc, while under power. If any voltage is seen on the CRT pins while the CRT board is removed, there is an internal leak-path in the CRT.

QUESTION NO. P32403-1: Viewsonic g810 monitor Chassis 21VS001(Panasonic), has no horiz sweep, hv is okay. Thin vertical line from top to bottom.

Check Q550, Q549, Q881, R890; there may also be a 0.8 Amp microfuse, marked "N11008", which resembles a small transistor, installed in the B+ path.

QUESTION NO. P32803-1: Hyundai DeluxScan 5854 monitor. I need a sub for Q303 (YTA 630) transistor.

A substitute for YTA630 is IRF630.

QUESTION NO. P32703-6: Packard Bell A720 monitor, FCC CKLA720. Is there an alternate horizontal output transistor for 2SC5404?

Possible substitutes for 2SC5404 might be 2SC5387 or 2SC5299.

QUESTION NO. P31303-3: Dell D1025HT monitor has dim picture and no red color.

This was a comman fault of VPS12 IC.

QUESTION NO. P32603-2: AcerView 7176ie monitor, the raster (without video input connected) flashed between black (normal) and high brightness. With video input connected, there was video on the screen, but the brightness alternated between normal and high brightness. Clicking sound could be heard as it flashed. G1 on the video board varied from about +33V to -180V when it should be about -45V. I replaced IC201 (TDA8351) and IC102 on the video board, but did not solve the problem.

Check/replace the three 450V electrolytics, C3950, C3951, C3952, their associated resistors (R3950, R3951, R3952), and the ceramic cap, C320 = 100pF/2KV. It may be wise to also check the ESR on electrolytics C301, C304, C307, and C330.

QUESTION NO. P32403-7: Dell p991 monitor has no video. Replaced Q901 (Irfi9634g) and Q902 (fs5km-18a, replaced with nte2958) both shorted. I checked R934, C507, C644 and C914.

Since Q901 and Q902 are for driving flyback transformer T901, I would check if the FBT is bad. Also check gate-protection zeners D906 (10V) and D909 (15V), as well as B+ cap C913, and ultrafast D907. If the G2 voltage is low/missing, check R916, D910, and C919. An FS5KM-18A is rated at 900 Volts, a higher rating than NTE 2958 (700 Volts); is that NTE substitute FET still OK?

QUESTION NO. P31403-8: Dell 1600h model D1626HS (Sony Chassis). I need the value of missing Q640 in power supply. R640 is open and looks like C641 has been replaced as there is carbon marks around it.

Assuming this model is actually the Dell/Sony 1600HS/D1626HT, Q640 is the dual transistor, MX0841AB-F; you can get this from Sony, as their part# 8-729-041-12. R640 = 0.1 ohm, 1/2 Watt, fusible; C641 = 470 pF/500V, ceramic.

QUESTION NO. P32003-8: KDS VS195 EVOKD1900 monitor. I need the part number or suitable cross for Q407 (mosfet).

Q407 is IRFS730. Mouser Electronics (www.mouser.com) lists IRFS730B, or else you can use IRF730 with an insulator. Also check or replace D409, D410, D411, D412; Q425; R497, R498; IC401; and the flyback transformer.

QUESTION NO. P31703-1: TVM AS6S monitor. I need the values of Q424, R495 and Q001.

In my schematic, Q001 = IRF630, Q424 = 2SC3117, and R495 = 10K ohms.

QUESTION NO. P31003-3: Compaq Presario MV520 monitor. I need the value of burned R903 located between the + of the mains cap and Collector of Q902.

R903 is 33K Ohms.

QUESTION NO. P22603-4: CTX VL950T FBT (Sampo FM1037D) monitor. I need a sub or specs on the FBT within the UK.

Sampo FBT = FM1037D = 47F13-07205, FBT is part# 47F13-0720s £26.44 inc VTA/P&P at Isotronic.
173 Martindale Rd, Hounslow, Middlesex, TW4 7EZ, 0208 577 6577 Tel, 0208 577 6657 Fax, 07939 273252 Mobile.

QUESTION NO. P31103-1: Sony GDM200ps FCC AK8GDM200PS monitor is black screen when turned on, the power LED turns solid green for a few seconds and then goes off and immediately after that LED turns amber and blinks. This happens irrespective of whether the vga cable is connected or not. It is on for 1.5 and off for 0.5 sec.

That LED flash-time sequence implies a horizontal/vertical deflection failure, or thermal protection. The most common cause of deflection problems in this (N3) chassis, is a defective IC007 (CXA2043Q) chip, Sony part number 8-752-078-46.

QUESTION NO. P30603-8: Gateway EV700 Monitor (LG - CA65 chassis) has very low brightness. It does control via the OSD menu. All voltages are correct, including the CRT filament voltage and filaments are properly lit. What should the G1 voltage be for proper brightness? The G1 voltage in this unit is controlled from the OSD processor. I have a voltage of neg 15v at maximum brightness and it goes further negative as I lower the brightness. If I force the circuit more toward 0v or positive voltage, the unit seems to get a near normal brightness level. This unit has no G2 level control on the fbt, so there seems to be no other point at which the brightness level can be set. I have checked this unit thoroughly for all possible bad caps and solder connections.

This model the G2 is controlled by the Micon and is set by software and an interface.

QUESTION NO. P21703-6: KTX GAG664SG monitor keeps blowing the line transistor after 2 hours. I changed 2SC3886 and FBT.

The drive is rough for some reason, a capacitor open the oscillator sparky etc. Check for a dry joint on a 470uF filter on the 12V line feeding the oscillator.

QUESTION NO. P30503-5: Acer 77c monitor has severe hourglass. The components around IC202, TDA8351, the vertical IC, did not look burned or unusual. I replaced IC202 anyway, but the problem was still there. I measured many transistors in the horizontal area in circuit and they seemed to be good.

Check C323 = 33 uF/250V.

QUESTION NO. P30503-6: CTX 1760LR monitor. I need value for C333 (someone else removed from mb.)

C333 as 10 uF, 250 Volts.

QUESTION NO. P30503-7: Dell Ultrascan P780, chassis SCC-L29K-A: monitor clicks on power up and then green light will turn amber and flash. HOT and all other components tested OK.

HV/+B failure Blink Amber on 0.5 sec off 0.5 sec.
H stop or V stop (included S-cap Blink Amber on 0.5 sec off 0.5 sec.
ABL Failure Blink Amber on 0.5 sec off 1.5 sec.
Aging/self-test Blink Amber on 0.5 sec off 0.5 sec Blink Green on 0.5 sec off 0.5 sec.
I think the H stop or V stop is Amber on 1.5 sec: off 0.5 sec.

QUESTION NO. P22603-8: KDS VSx-7 FCC EVOKD-1730 with R901 blown and power led only flickers, would like resistor value and any other recommendations.

R901 is 27K ohms. This resistor burns when the flyback is bad (and needs replacing). The bad flyback might also have damaged any of R902, R903, R904, Q411, and IC401.

QUESTION NO. P22103-3: Hyndai hl-4848f monitor. I need value for burned Q120 and Q121.

If this Hyundai is FCC# CKLHL-4850A, chassis C-1420, in that schematic, Q120 is shown as MPSA42, and Q121 is shown as C3198 (2SC3198).

QUESTION NO. P21803-5: Hyundai Deluxscan 17B+ monitor (HL-7870A) has a faulty flyback transformer, no luck in sourcing this part, the transformer is not listed in the HR Diemen catalogue either. I need an equivalent or source. The original flyback is of DuGo brand and they do not reply to our emails.

The flyback transformer seems to cause every problem with these model monitors, the main problem is a dull screen caused by the flybacks inability to supply a sufficient voltage to the screen. overheating can also cause this. The flyback can also cause resistors to burn out! You can also buy a blur buster which should solve the problem.

QUESTION NO. P21803-6: LG cb563g monitor. I need a sub for c5803 transistor on horizontal. I tried bu508df and there is a white band coming on the left.

The KSC5803 is a 12 Amp HOT, and has no internal damper diode. BU508DF is only rated 8 Amps, and has a damper. To sub KSC5803, a 12 Amp HOT like 2SC4890, 2SC5048, or BU2525AF, would be more appropriate. If it is actually KSC5803D ('D' suffix), then it does have an internal damper diode, and a HOT with an internal damper, like BU2525DF, might be used.

QUESTION NO. P21303-6: Sony CPD-200ES monitor is dead, orange LED blinks. Replaced blown C582 (102k 2kV) with no change. No HV to the CRT.

C582 is in the feedback circuit from Q507, back to IC904 = TDA9105. If it has blown, also check D903, D944, D945, D946, C944, R960, and IC904, along that circuit.

QUESTION NO. P21303-10: Princeton Ultra17+ monitor FCC EVOKD-1700V. Q415, BC401 burned, need value.

Q415 can be BU2525AF or MJW16212. BC401 is 0.68 Ohm, 1 Watt.

QUESTION NO. P21203-6: Sony GDM200ps FCC AK8GDM200PS monitor is black screen when turned on, the power LED turns solid green for a few seconds and then goes off and immediately after that LED turns amber and blinks. This happens irrespective of whether the vga cable is connected or not.

This monitor has shut itself down for a suspected fault. Which circuit is at fault, is indicated by a code, given by the precise On and Off times (in seconds) of the Amber LED. If the LED is On for 0.5 sec, Off for 0.5 sec, this is a B+ failure. If On for 1.5 sec, Off for 0.5 sec, this is either a Horizontal or Vertical deflection failure, or thermal protection. If On for 0.5 sec, and Off for 1.5 sec, this is ABL failure. If On for 0.25 sec, Off for 0.5 sec, then On for 0.25 sec, and Off for 1.5 sec, this is High Voltage failure.

QUESTION NO. P21203-8: Compaq Qvision200 Monitor model 480, FCC GZM1323. I need the value of the resistor on the back side of the board (no number). It is on the back side of T803. I replaced C839, which was burned up, and then discovered this resistor on the back side was open. The stripes are no longer legible due to the heat.

The value of that resistor is 330K Ohms, 1 Watt. It may help to install a 2 or 3 Watt, instead.

QUESTION NO. P13003-8: Acer 1555 monitor FCC JVP7254E displays horizontal line. Replaced ic tda4866 but did not help. Checked capacitor and resistor on vertical area and is all ok.

Besides the resistors and electrolytics, also check if C220 has shorted.

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CRT REPAIR

2009-01-14T05:37:00.000-08:00

How to clear CRT Shorts - submitted by Mike Fischer

Remove the CRT card from ther CRT. Ground the G2 pin with jumper clips. Connect the focus pin to a screwdriver shaft. Apply power momentarily to get the HV up. Unplug the power and quickly touch the screwdriver to the CRT anode. Discharging the HV from Focus to G2 often removes internal shorts.

Clearing CRT Shorts - submitted by Jim Kocmoud. Jim is a member of our email discussion groups. All subscribers have access to his, as well as over one hundred other technician's comments and expertise.

If the CRT is shorted Focus to G2, one technique that we use is to disconnect the G2 wire from the CRT PCB. Then, power up the set, and when the focus voltage backfeeds into the G2 and builds up a potential, it will arc thru the G2 circuit protector to ground and Voila, short is gone! If the CRT is shorted HV to Focus, we remove the CRT PCB, and hold a grounded screwdriver about 1/2" away from the focus pin. Again, after power up, the resulting arc usually clears the short.

HK shorts in CRT's - submitted by Nicolas Cannonne. Nicolas is a member of our email discussion groups. All subscribers have access to his, as well as over one hundred other technician's comments and expertise.

This is useful when you have a CRT short from any cathode to heater. The aim is to apply an ungrounded voltage to heater pins. First cut all traces that goes to the heater pins on CRT board. Then take a wire, make one (or more) loop around FBT core and apply the 2 ends of the wire at the enter of the schema. This signal is something like AC signal going from –10V to +15V at the Horizontal frequency rate. So the diodes avoid any negative voltage, the caps are doing a nice flat 15VDC and the regulator make the 6.3V required for the heater. The LM317 has to be mounted on heatsink. I have added one more diode in input just to drop 0.7V.The less the input is the less the reg heats. Connect to 2 output pins directly to the heater pins on CRT board. First thing to do is to check with your scope the output voltage of the wire looped on FBT, may be you’ll have to do some additional turns to increase voltage. You can replace the 1K resistor by a 5K pot to adjust the output voltage. Heater usually draws something like 1A. This has saved 3 Trinitron CRT for me.

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