| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | NC3 | dead - 2A fuse o/c | 4R7 dropper o/c, BUT11AF chopper tr s/c, dry joints chopper tfmr & others | 14-09-04 |
| Philips | NC3 | Dead - blowing line output Tx BUT11AF Q501. | Dry joints on LOPTX especially pin 10. | 14-09-04 |
| Philips | NC3 | Dead - blown chopper transistor. | R418 o/c. | 14-09-04 |
| Philips | NC3 | Dead - chopper Q401 duff. | Check for drys at connections to chopper Tx T402. | 14-09-04 |
| Philips | NC3 | Dead - went with bang | burnt print around on/off sw also blew Q400 BC337 s/c; D404, 411, 407, 410 1N4148 s/c | 14-09-04 |
| Philips | NC3 | Dead chopper TR s/c R401 ( 4R7 ) o/c | Check for D/J around Chopper TX & LOPT | 14-09-04 |
| Philips | NC3 | DEAD WHISTLES DISCONNECTING PIN 2 LOPT AND SET RUN | CHECK D2581 2582 8v2 ZENER OR THYRISTOR | 14-09-04 |
| Philips | NC3 | Dead with whistle | OK on dummy load, Zener diodes 2581/2 8v2 leaky in crowbar trip cct | 14-09-04 |
| Philips | NC3 | Field - lack of height | R581 3M9 hi res connected to 95v supply in TDA4505 cct | 14-09-04 |
| Philips | NC3 | FIELD FOLDOVER | R556 HIGH ( 24k ) | 14-09-04 |
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| Philips | NC3 | Goes into prot mode aft half an hour | 100v HT had gone high - CNX62 opto coupler faulty | 14-09-04 |
| Philips | NC3 | Horizontal lines & streaks | C2413 100µ 400v o/c | 14-09-04 |
| Philips | NC3 | Int pic | R608 18R dry joint | 14-09-04 |
| Philips | NC3 | Intermittent poor picture & garbled sound. | Channel change switch S300. | 14-09-04 |
| Philips | NC3 | Monochrome pic with false line lock | Misshapen sandcastkle pulse caused by TDA4505 chip - also check 680k line pulse feed res | 14-09-04 |
| Philips | NC3 | Motorboating sound with green raster | C2483 dry joints had damaged 5v reg 78M05 | 14-09-04 |
| Philips | NC3 | No col | Replace TDA3565 dec chip & adj R635 ref osc. To adj s/c pins 5 & 1 of chip | 14-09-04 |
| Philips | NC3 | No colour | Try adjusting R635. | 14-09-04 |
| Philips | NC3 | No colour - brightness/contrast inoperative. | IC TDA4505. | 14-09-04 |
| Philips | NC3 | No pic - sound ok | No A1 volts - LOPTx faulty | 14-09-04 |
| Philips | NC3 | No pic for first 2 hours | Replace TDA3565 dec chip & adj R635 ref osc. To adj s/c pins 5 & 1 of chip | 14-09-04 |
| Philips | NC3 | No pic just blank raster - sound ok | Sandcastle pulse dist - break in print between R570 & SC gen o/p from IC pin27 | 14-09-04 |
| Philips | NC3 | No picture & garbled sound. | Channel change switch S300. | 14-09-04 |
| Philips | NC3 | NO SOUND AND POOR CONTRAST | R416 10R OC | 14-09-04 |
| Philips | NC3 | No tuning adjust - original settings ok | Bad contacts on chan switch | 14-09-04 |
| Philips | NC3 | Poor contrast & no sound | R416 10R in 22v feed | 14-09-04 |
| Philips | NC3 | RASTER BLANK OSD WORKS | TDA3565 US | 14-09-04 |
| Philips | NC3 | Ringing pic, weak & buzzing sound | Check SAWF & ceramic filters in IF | 14-09-04 |
| Philips | NC3 | Tuning indicator (green line) perm displayed | C371 100µ 16v s/c | 14-09-04 |
| Philips | NC3-CR | Horizontal striations over screen. | C2413 ( 100uf , 400v ) o/c. | 14-09-04 |