| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | G90AE | SET DEAD WORKS IF SUPPLY REDUCED TO 90v | D6653 | 14-09-04 |
| Philips | G90AE | Set intermittently tripping. | Suspect fault around trip circuit comprising T7655/7656.
Replace zener diodes 6657, 6658, 6659 and especially 6655 - 15 volt zener. | 14-09-04 |
| Philips | G90AE | Shut down aft 10 mins with HT low at 30v | Tr7652 BC557C - check it with freezer | 14-09-04 |
| Philips | G90AE | SHUTS DOWN , TICKING NOISE FROM PSUP | T7652 ( BC557C ) LEAKY , THEN RAGGED R3668 ( 150R ) AND FIT NEW HT RESERVIOR CAP 47mfd C2630 | 14-09-04 |
| Philips | G90AE | Shuts down on full mains - ok on 90v ac | Not a prot fault - D6653 leaky (supplies opto coupler) | 14-09-04 |
| Philips | G90AE | Shutting down with a ticking PSU. | Tr7652 ( BC557C ) leaky , R3668 ( 150ohm ) scorched , Check C2630 HT res | 14-09-04 |
| Philips | G90AE | Sound int | D6272/6278 BAS32 sm in series with 20v supply to sound chip IC7220 TDA8191 | 14-09-04 |
| Philips | G90AE | Spare part information | Spare part information
Codenumber channel selector UV615 including hyperband is 4822 210 10374. | 14-09-04 |
| Philips | G90AE | Squeal from psu - sound & pic ok | R3614 360k; R3618,R3620 180k; C2630 47µ (HT res cap) | 14-09-04 |
| Philips | G90AE | Squeal from psu (sound & pic ok) | Renew the three bridge sm resistors 3620 (180K), 3618 (180K) and 3614 (360K) and the Ht decoupler C2630 (47mfd / 160v) | 14-09-04 |
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| Philips | G90AE | Striations | A production change has been introduced adding the following components in the +95 volt feed to the line output stage:
Description: Position no. 5558 Code no. 4822 158 10563 Choke 82uH Capacitor 10n 100V Position | 14-09-04 |
| Philips | G90AE | Stuck on chan 8, front controls & R/C inop - st/by led flashing | Replace C2843 [220uf] in 5 volt regulator | 14-09-04 |
| Philips | G90AE | Switches off and on shortly | Selects always program 1 and adjusts PP-value.Check C2397 (33nF; 5322 121 41763) on the CRT panel for leakage.
Bend C2397 on picture-tube PCB from picture-tube socket. | 14-09-04 |
| Philips | G90AE | The upper part of picture consists of few lines | Check C2475 (33nF/63V; 5322 122 31848).
| 14-09-04 |
| Philips | G90AE | The voltage of +95V line alters | Check transistor 7653 (BC858A; 5322 130 42012).
| 14-09-04 |
| Philips | G90AE | Tripping | If HT set at 95v tripping stops but blank raster. Xtal filter 1030 s/c with solder | 14-09-04 |
| Philips | G90AE | Tripping aft 10 mins operation | Can be instigated by heating/cooling around psu - replaced 150R sm (R3668?) | 14-09-04 |
| Philips | G90AE | Tripping with clcking thro spkr | Same on dummy load - Replace C2630/1 47µ 160v. R3668 sm 150R had dropped off. Replaced also 7652 BC557C & opto coupler as precaution | 14-09-04 |
| Philips | G90AE | Trips on & off violently aft several mins | Ozone smell - focus pin arcing - replace crt base | 14-09-04 |
| Philips | G90AE | Trips rapidly | Tr7652 BC557C in pulse width mod in psu | 14-09-04 |
| Philips | G90AE | Tuning unstable | Voltage on diode D 6770 not stable
Replace D 6770 (ZTK 33B; 4822 130 30959) | 14-09-04 |
| Philips | G90AE | Tuning, display and remote control not functioning | Voltage of pin 42-IC7720 low,
TR7661 defective (BD135; 4822 130 40823). | 14-09-04 |
| Philips | G90AE | TXT horizontal synchronization missing | Check horizontal phase discriminator detection filter capacitor C2827 (47nF; 4822 122 32542). | 14-09-04 |
| Philips | G90AE | Txt poor - looks like purity errors | Dry joints wire links on main pcb near Txt panel | 14-09-04 |
| Philips | G90AE | Weak video & no sync | TDA5850 | 14-09-04 |
| Philips | G90AE | When fitting psu mod kit | Diodes 6608 & 6609 should be wired in series and then connected between base/emitter of 7625 (BUT11AF) with the anode end of the pair to base. (if not already fitted) | 14-09-04 |
| Philips | G90AE | When the set is switched on, the SOPS starts tripping. | If the mains voltage is turned up using a variac, the +95 line supply gets to 80 volts then starts pulsing. Check/replace R3668 - 150 Ohms SMD (5322 111 90098) | 14-09-04 |
| Philips | G90AE | White screen, not adjustable | Check POR-transistor 7663 (BC858; 5322 130 42012).
| 14-09-04 |
| Philips | G90AE | Will not stay in Standby mode | The reason of this fault is R3669 220 Ohm in the Power supply. Service code 4822 051 10221. | 14-09-04 |
| Philips | G90AE | Wont go into st/by - LED goes orange not red | D6669 BAS32 s/c | 14-09-04 |