| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | G90AE | Foldover & flyback lines at top of pic | OK in widescreen - Voltage at cathode of diode 6570 95V
Should be 163V. O/C R3570 | 14-09-04 |
| Philips | G90AE | Foldover with fb lines - only present in 4:3 | Voltage at cathode of diode 6570 95V Should be 163V. O/C R3570 | 14-09-04 |
| Philips | G90AE | For 5 minutes zigzag edges in the picture | C2630 (47uF/160V; 4822 124 41056).
| 14-09-04 |
| Philips | G90AE | Humming, ticking | Replace thyristor 6670. (SFOR5D43, 4822 130 20245).
| 14-09-04 |
| Philips | G90AE | If +95V is 1) 30V, 2) 50V, 3) 80V | 1) diode 6546 (BYD33M; 4822 130 42489)
2) diode 6653 (BAS32; 4822 130 80446)
3) diode 6613 (BAS32; 4822 130 80446) | 14-09-04 |
| Philips | G90AE | Int dead | Dry joints R3671 sm res - feeds from Tr7671 to thy 6670 gate | 14-09-04 |
| Philips | G90AE | Int loss of col, sound, random chan change & "F4" int shows | Replace micro/EEPROM IC7600 & IC7601 | 14-09-04 |
| Philips | G90AE | Int loss of line/field sync | Resolder 6k8 sm under C2473 | 14-09-04 |
| Philips | G90AE | INT SOUND | D6272 BAS32 INT OC IN 20v FEED TO TDA8191 | 14-09-04 |
| Philips | G90AE | Int st/by, loss of sigs, col, contrast | Proc chip TMP47C43N-3555 faulty - replacement has metal shield | 14-09-04 |
|
|
| Philips | G90AE | Intercarrier-hum | Adjust coil S 5115 for minimum hum.
See service manual CHASSIS G90AE (4822 727 16447) page 4 point 13 | 14-09-04 |
| Philips | G90AE | Keeps interrupting | R3672 (4K7; 5322 111 90111).
| 14-09-04 |
| Philips | G90AE | LED blinks in stand-by mode | Check/replace thyristor 6670 (SFOR5D43; 4822 130 20245).
| 14-09-04 |
| Philips | G90AE | LINE PAIRING TOP HALF OF SCREEN | C2475 ( 33n ) DECOUPLES PIN 2 OF IC7470 | 14-09-04 |
| Philips | G90AE | Lines - fine dark horiz when heated | Dry joints tuner | 14-09-04 |
| Philips | G90AE | Lines in picture. | Check/replace R 3570 (8,2 Ohm; 4822 052 10828)
| 14-09-04 |
| Philips | G90AE | Low EHT with LOPTx making fizzing noise | Noise stopped when pin 2 LOPTx dis'd - IC7470 TDA2579A timebase chip faulty (internal s/c on supply pin 10) | 14-09-04 |
| Philips | G90AE | Nicam -int | Check joints on grey sm caps on NICAM pcb - will often req a quick solder round | 14-09-04 |
| Philips | G90AE | No Blue | D6416 BAS32 u/s | 14-09-04 |
| Philips | G90AE | No chan store | X2402 EEPROM | 14-09-04 |
| Philips | G90AE | No col (s/c pins 1 & 6 dec chip to overide col kill) | Ref osc could not be locked by C2352; C2359 leaky | 14-09-04 |
| Philips | G90AE | No colour | C2359 leaky. | 14-09-04 |
| Philips | G90AE | No line osc | Check pin 16 IC7470 TDA2579 for 9v - if low check volts across D6455 5v6 zener - if low replace D6455 BZX55F5V6; if ok replace Tr7455 BC858 | 14-09-04 |
| Philips | G90AE | No OSD - no sound , blank raster. | IC TMP47V434N-3555 IC7720 | 14-09-04 |
| Philips | G90AE | No pic at sw on - just lines across screen - ok when heated | C2580 1000µ | 14-09-04 |
| Philips | G90AE | NO PIC TEXT OK TDA3561A PIN 7 -ve NOT 3.4v | C2560 33nF | 14-09-04 |
| Philips | G90AE | No picture, no sound | Voltage +95 V present
Replace IC 7470 (TDA 2579/N6; 4822 209 72363) and
replace TS 7455 (BC 858A; 5322 130 42012) | 14-09-04 |
| Philips | G90AE | No picture, sound OK. | Video signal present on pin 19 SCART, video signal not present on pin 3 IC 7350.
Replace TS 7881 (BC 848; 4822 130 61207) | 14-09-04 |
| Philips | G90AE | No picture, sound OK. | Vertical signal not present on basis TS 7503
Replace TS 7471 (BC 848C; 5322 130 42136) | 14-09-04 |
| Philips | G90AE | No picture, sound OK. | Video signal present on pin 3 IC 7350.
RGB-Signal not present on pin 12, 14, 16 IC 7350.
Replace IC 7350 (TDA 3561A/N8; 4822 209 71518) | 14-09-04 |