| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | G90AE | No red | D6854 BAS32 sm diode s/c | 14-09-04 |
| Philips | G90AE | No sound | Check sm diode near audio ic for dry joints | 14-09-04 |
| Philips | G90AE | No sound - blank raster , no OSD. | IC TMP47C434N-3555 IC7720 | 14-09-04 |
| Philips | G90AE | No sound with "F7" in display | C2661 22µ in 5v reg cct | 14-09-04 |
| Philips | G90AE | No sound, picture OK | Picture present, program selection functions.
Replace IC 7220 (TDA 8191; 4822 209 60103) | 14-09-04 |
| Philips | G90AE | No sound, picture OK | Picture present, audio signal present on pin 17 of IC 7220.
Replace BU 5 (4822 267 60188) | 14-09-04 |
| Philips | G90AE | No startup. | D6653 leaky. | 14-09-04 |
| Philips | G90AE | No synchronization, pin 7-IC7470 low | Check C2469 (22uF; 4822 124 20698) for short-circuit.
| 14-09-04 |
| Philips | G90AE | No text, front controls perform wrong task. | i.e. brightness varies when volume buttons are pressed. Check 5 volts to uP. If supply voltage low eg. 3 volts instead of 5 volts, check/replace D6662 in Power Supply Part.
D6662 - 5.1 Volt zener diode (4822 130 80905) | 14-09-04 |
| Philips | G90AE | no tuning caused by the SDA3202-2 in the tuner | If there is no oscillation at the Xtal , change the IC , the same is true for the CUC3400 Grundig | 14-09-04 |
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| Philips | G90AE | No Txt & "F7" in display with sound possibly missing | C2843 220µ | 14-09-04 |
| Philips | G90AE | No vertical deflection | No vertical control signal on pin 1 IC 7470
Replace IC 7470 (TDA 2579/N6; 4822 209 72363)
Replace D 6465 (BAS 32L; 4822 130 80446) | 14-09-04 |
| Philips | G90AE | Oscillation wide in weak field on the right side. | It moves to the left and disappears after the set has warmed.
Check/replace transistor 7533 (BC636; 4822 130 44283) in east-west circuit. | 14-09-04 |
| Philips | G90AE | Over-voltage circuit active | Disconnect connector A5 and connect a bulb to +95 Volt.
Bulb burns.
Check/replace TS7545 (BUT11AF;4822 130 42679) and
S5545 (line transformer; 4822 1040 10306) | 14-09-04 |
| Philips | G90AE | Pic goes dark aft 2hrs & no chan change Display shows F4 | IC7720 faulty | 14-09-04 |
| Philips | G90AE | Picture becomes dark from time to time, cannot be adjusted | Transistor 7869 (PMBT2369; 4822 209 73852) base not soldered.
| 14-09-04 |
| Philips | G90AE | Picture too dark | Voltage on pin 7 S 5545 (line transformer) < 3,2V
Replace C 2560 (33 nF; 4822 121 51385). | 14-09-04 |
| Philips | G90AE | Poor contrast range | C2560 33nF leaky in beam current limiter cct | 14-09-04 |
| Philips | G90AE | Popping from spkrs only at sw on | C2630/31 smoothing caps 47µ 250v | 14-09-04 |
| Philips | G90AE | Power supply failure | In the event of a failure in the switch-mode power supply, the switching transistor IC7625 may have failed. In this case it is recommended that the opto-coupler IC7614 should also be replaced.
7625: BUT11AF; 4822 130 42679
7614: CNX83A; 4822 130 82034 | 14-09-04 |
| Philips | G90AE | PSU pulsing with LED flashing in time | HT o/p only 80/90v when LOP dis'd (should be 95v) - check soldering of sm comps on psu sec | 14-09-04 |
| Philips | G90AE | Pulsing/rolling/jagged white line at top of screen | IC7470 TDA2579 timebase chip | 14-09-04 |
| Philips | G90AE | Ragged pic, dim display | C2640 680µ 22v smoother, C2580 470µ 12v smoother | 14-09-04 |
| Philips | G90AE | Ragged verticals on some pictures. | C2630 ( 47uF ) HT reservoir con. | 14-09-04 |
| Philips | G90AE | Ragged verts | C2630 47µ HT res cap leaky | 14-09-04 |
| Philips | G90AE | REDUCED HEIGHT , TOP FOLDOVER | R3508 24k HIGH | 14-09-04 |
| Philips | G90AE | Remote control inoperative - dark picture. | Replace IC 7720. | 14-09-04 |
| Philips | G90AE | Replacing the EAROM | Replacing the EAROM.The memory IC has been replaced by type ST24C02CP (code no.4822 209 62098). On some receivers however, the circuit will have to be modified.
a. If the ST24C02CP is being fitted in place of an X2402 no circuit changes will be required | 14-09-04 |
| Philips | G90AE | Servicing the Philips G90AE Chassis | See TV Mag Jan 1997 | 14-09-04 |
| Philips | G90AE | Set blocks | Voltage on I2C-Bus (pin 5 and 6 IC 7720) < 4,9 V
No pulses visible on oscilloscope when selecting another program
Replace IC 7770 (ST24C02CP; 4822 209 62098).
Mount metal shielding 4822 466 82783 on uP (IC 7720) with earth to jumper 9711. | 14-09-04 |