| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | GR2.4 | Set totally inoperative, mainfuse F1600 (2.5AT) blown. | Replace T7625 (BUT12AF) and D6602-6605 (short circuit).
Replace IC7614 CNR50 9407. | 14-09-04 |
| Philips | GR2.4 | Sound mute depending on video-contents of the picture | Solder a 12 volt zenerdiode (4822 130 81288) with cathode to the positive side of (+) of C2246. Solder the anode of this zenerdiode to earth. Solder a 150 Ohm (4822 116 52211) resistor to the cathode of the zenerdiode. Solder the other side of this resist | 14-09-04 |
| Philips | GR2.4 | Spare part information | Spare part information From QG04 onwards the following L.O.T are used:
25" and 28" Black line S sets use L.O.T 4822 140 10501
25" and 28" Black matrix sets use L.O.T 4822 140 10503
21" sets with 90 degree picture tube use L.O.T. 4822 140 10499
for | 14-09-04 |
| Philips | GR2.4 | Supply is hickupping. | Replace LOT L5545 CML OP503.
| 14-09-04 |
| Philips | GR2.4 | Totally inoperative. | Replace IC7614 (CNR 50; 4822 130 30992) and SOPS transistor T7625 (BUT12-AF; 4822 130 62735) | 14-09-04 |
| Philips | GR2.4 | Tripping | To disable trip unsolder pin 2M37 on power control module. Fault was caused by Audio O/P chip IC7240 TDA1521 & o/c CP1601 2.5A cct prot in -16v supply | 14-09-04 |
| Philips | GR2.4 | Tripping continuously with bursts of EHT OK with LOP sect dis'd | Check 1534 orange col fuse also C2550 680n 250v | 14-09-04 |
| Philips | GR2.4 | Tripping with Green LED flashing in sympathy (After cust tried connecting his own spkrs) | hole in the stereo audio output chip (TDA1521 IC7278) mounted on a sub board to the left of the main chassis and also one of those small rectangular CP's (cir ref 1242) marked "MP160" on the main board (left edge) was O/C. IC7240 (also a TDA1521) mounted along the left edge of the main board cured the tripping. | 14-09-04 |
| Philips | GR2.4 | Trips | Check fus res R3588 for o/c - if it is then replace C2549 scan coupling cap - usually 680nF 250v | 14-09-04 |
| Philips | GR2.4 | Unstable zoom and broken vertical lines | Check contact of connector Y95 on the MODULE 16/9. | 14-09-04 |
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| Philips | GR2.4 25PT632A/05 | Dead - mains fuse in plug blown | Caused by arcing on/off sw | 14-09-04 |
| Philips | GR2.4 29PT5301/05 | Dead with mains I/p fuse o/c | Check for dry joints PSU pri | 14-09-04 |
| Philips | GR2.4 29PT632A | Dead with burn up of mains sw & sub pcb | Replacement pcb available from SEME | 14-09-04 |
| Philips | GR2.4 29PT632A | No R/C functs after replacement of mains sw sub panel | Check for s/c track on o/p of IR rx | 14-09-04 |
| Philips | GR2.4 29PT727B | Tripping with burning smell possible | Tr7545 LOPTr s/c due to C2550 dry joint &/or o/c | 14-09-04 |
| Philips | GR2.4AA | Dead - dry joints scan coil panel | Also damaged -1534 315mA fusible, 3570 6R8 resistor, 6560 LL4148 diode, 6561 BZX79-C68 zener & 7545 BU508AF LOPTr | 14-09-04 |
| Philips | GR2.4AA | Dead set with beep beep from psu | Dis plug M71 & check for 150v at coil L5631. If ok check LOP stage - LOPTr, LOPTx, F1534 o/c fuse, 6546 BY226 leaky (will have damaged diodes 6560 LL4148) & 6561 BZX79C68) | 14-09-04 |
| Philips | GR2.4AA | Dead with hissing/crackling | dry joints scan coil plug | 14-09-04 |
| Philips | GR2.4AA | No raster - sound & EHT OK - loptr overheats | Scan coils s/c due to dry joints on small pcb on scan coils | 14-09-04 |
| Philips | GR2.4AA | Screen went green & blinked out | R3374/3434 1k5 o/c, R3431 180R, R3372 270R o/c, Tr7364 BF422 leaky on crt base. Caused by leakage in crt cured by rejuvenation | 14-09-04 |
| Philips | GR20 GR1AX | Lines at top of screen | Coil 5524 reading 7R5 | 14-09-04 |
| Philips | GR21AA | DEAD STBY LIGHT FLASHING NO LINE DRIVE | R3455 1k HIGH | 14-09-04 |
| Philips | GR21AA | DEAD WITH POWER SUPP. RUNNING | CHECK IC7880 PCA84C81AP/098 ( UNPLUG TEXT PCB TO PROVE ) | 14-09-04 |
| Philips | GR21AA | EHT BUT NO SOUND OR PIC AND A FLASHING LED ( WHEN | TDA2579B PRODUCING WRONG S.CASTLE PULSES | 14-09-04 |
| Philips | GR90AE | NO RED IN RGB INPUT | BAS32 S.MOUNT DIODE D6854 | 14-09-04 |
| Philips | GRl-AX | Intermittently dead | The cause of this nasty fault turned out to be a small coil , L5524 , which filters the supply to the line driver stage. It was | 14-09-04 |
| Philips | IKC1 | Pic had moved up after field stage repair | RL83 0R22 feeds pins 18 & 21 of Fop chip | 14-09-04 |
| Philips | IKC2 | ht low at 30v | CP51 100µ 250v ht smoother o/c | 14-09-04 |
| Philips | K30 | Black band across screen | Varies with tuning & agc Adj - Replace 3 electro caps in IF can | 14-09-04 |
| Philips | K30 | Blank raster - sound Ok. | C1586 ( 100uf , 35v ) | 14-09-04 |