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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 4551
Philips
2A
Intermittent no raster.
Check if pin 7 ( TDA3561 ) has gone to 0v if so C2496.
14-09-04
Philips
2A
Lack of contrast.
R3496 ( 15k ) , D6493 12v zener.
14-09-04
Philips
2A
Line ripple aft few mins with low HT
C2664 - normally causes dead set
14-09-04
Philips
2A
line tear and poor field sync
C2550 1uF
14-09-04
Philips
2A
Lines - vertical over whole screen.
2691 ( 33pf ) , 3691/2 ( 3.9m ) , drys in power supply/earthing
14-09-04
Philips
2A
Lines/tearing until warmed up
C2550 1µ 63v hi esr
14-09-04
Philips
2A
Memory - loss.
Degaussing thermistor.
14-09-04
Philips
2A
Moire type patterning
Check the ceramic cap across fop chip isn't missing (if you've just changed it for instance)
14-09-04
Philips
2A
No frame - 2x resistors burnt up by LOPTX.
R3638+3645 ( .33R ) , Check diode by them , Frame IC TDA.
14-09-04
Philips
2A
No pic/sound - LED blinks in time with HT
Repeated resetting of micro due to reset drive 0.5volts low - fit additional 10µh choke across L5642 to restore 7v value
14-09-04
Philips
2A
No tuning but displays correct chan no.
Tuning volts remain at 33v; R3740 5R6 on CITAC module o/c (No 5v to tuner divide by 256 cct)
14-09-04
Philips
2A
No tuning front display shows correct channel
R3740 ( 5.6R ) on citac module o/c.
14-09-04
Philips
2A
No tuning just noise.
Break between pin 4 of tuner & pin 7 of socket M1.
14-09-04
Philips
2A
No tuning.
R3730 ( 160ohm ) o/c.
14-09-04
Philips
2A
Patterning.
Fit C2565 ( 390pf ) between pins 1&5 of IC7570 ( frame )
14-09-04
Philips
2A
Pic on some chans alternates between pic & snow
OK on scart I/p - 1µ 50v cap in tuner hi esr
14-09-04
Philips
2A
Picture looked like a mosaic
TDA3561 us
14-09-04
Philips
2A
Poor HT reg - chopper Tr overheats & may fail
D6663 BYD14K
14-09-04
Philips
2A
Raster - low brightness & hanover blinds.
IC TDA3561A.
14-09-04
Philips
2A
REPEAT FAILURE OF LINE OP. TRANSISTOR
CHECK LINE DRIVE TRANSFORMER FOR DRIES
14-09-04
Philips
2A
SET CUTS OUT INT . THEN JUST BUZZES
D6699 OR D6700 6v8
14-09-04
Philips
2A
Set ticking in stand by.
Check/replace C2690 - 1uF 100 volt non-polarised. R3689 - 39 Ohms of pin 8 of SOPS transformer. D6689 - 1N4148 diode (4822 130 30621).
14-09-04
Philips
2A
SET TICKS IN STBY
C2690 1uf 100v
14-09-04
Philips
2A
Shuting down with a whine.
Drys on C2609.
14-09-04
Philips
2A
SLOW START UP
R3670 33R HIGH OR OC
14-09-04
Philips
2A
SOPS radiation
During later production of the 2A chassis, two changes were introduced to reduce radiation from the SOPS power supply and also to limit the dissipation in TS7687. COMPONENT POSITION CHANGE CODE NO. 2n7 capacitor C2694
14-09-04
Philips
2A
Sound crackling - even if EHT lead disconnect
C2618 ( 1.5nf )
14-09-04
Philips
2A
SOUND UNSTABLE + OSCILLATES
C2151 0.1uF
14-09-04
Philips
2A
Stand-by LED is on, but the set does not go to stand-by mode.
R3730 (160 Ohm; 4822 116 52212) or diode 6730 (4822 130 30842; pos.nr.1900) on CITAC module broken. Thyristor 6727 (BT151/500R; 5322 130 24081) defective.
14-09-04
Philips
2A
Teletext drop out.
With lines on picture. solder text ICs direct to panel.
14-09-04
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