| 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 |