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Repair tips

Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 4551
PhilipsGR2.4Set totally inoperative, mainfuse F1600 (2.5AT) blown.Replace T7625 (BUT12AF) and D6602-6605 (short circuit). Replace IC7614 CNR50 9407.14-09-04
PhilipsGR2.4Sound mute depending on video-contents of the pictureSolder 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 resist14-09-04

PhilipsGR2.4Spare part informationSpare 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
PhilipsGR2.4Supply is hickupping.Replace LOT L5545 CML OP503. 14-09-04
PhilipsGR2.4Totally inoperative.Replace IC7614 (CNR 50; 4822 130 30992) and SOPS transistor T7625 (BUT12-AF; 4822 130 62735)14-09-04
PhilipsGR2.4TrippingTo 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 supply14-09-04
PhilipsGR2.4Tripping continuously with bursts of EHT OK with LOP sect dis'dCheck 1534 orange col fuse also C2550 680n 250v14-09-04
PhilipsGR2.4Tripping 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
PhilipsGR2.4TripsCheck fus res R3588 for o/c - if it is then replace C2549 scan coupling cap - usually 680nF 250v14-09-04
PhilipsGR2.4Unstable zoom and broken vertical linesCheck contact of connector Y95 on the MODULE 16/9.14-09-04
PhilipsGR2.4 25PT632A/05Dead - mains fuse in plug blownCaused by arcing on/off sw14-09-04
PhilipsGR2.4 29PT5301/05Dead with mains I/p fuse o/cCheck for dry joints PSU pri14-09-04
PhilipsGR2.4 29PT632ADead with burn up of mains sw & sub pcbReplacement pcb available from SEME14-09-04
PhilipsGR2.4 29PT632ANo R/C functs after replacement of mains sw sub panelCheck for s/c track on o/p of IR rx14-09-04
PhilipsGR2.4 29PT727BTripping with burning smell possibleTr7545 LOPTr s/c due to C2550 dry joint &/or o/c14-09-04
PhilipsGR2.4AADead - dry joints scan coil panelAlso damaged -1534 315mA fusible, 3570 6R8 resistor, 6560 LL4148 diode, 6561 BZX79-C68 zener & 7545 BU508AF LOPTr14-09-04
PhilipsGR2.4AADead set with beep beep from psuDis 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
PhilipsGR2.4AADead with hissing/cracklingdry joints scan coil plug14-09-04
PhilipsGR2.4AANo raster - sound & EHT OK - loptr overheatsScan coils s/c due to dry joints on small pcb on scan coils14-09-04
PhilipsGR2.4AAScreen went green & blinked outR3374/3434 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
PhilipsGR20 GR1AXLines at top of screenCoil 5524 reading 7R514-09-04
PhilipsGR21AADEAD STBY LIGHT FLASHING NO LINE DRIVER3455 1k HIGH14-09-04

PhilipsGR21AADEAD WITH POWER SUPP. RUNNINGCHECK IC7880 PCA84C81AP/098 ( UNPLUG TEXT PCB TO PROVE )14-09-04
PhilipsGR21AAEHT BUT NO SOUND OR PIC AND A FLASHING LED ( WHENTDA2579B PRODUCING WRONG S.CASTLE PULSES14-09-04
PhilipsGR90AENO RED IN RGB INPUTBAS32 S.MOUNT DIODE D685414-09-04
PhilipsGRl-AXIntermittently deadThe cause of this nasty fault turned out to be a small coil , L5524 , which filters the supply to the line driver stage. It was14-09-04
PhilipsIKC1Pic had moved up after field stage repairRL83 0R22 feeds pins 18 & 21 of Fop chip14-09-04
PhilipsIKC2ht low at 30vCP51 100µ 250v ht smoother o/c14-09-04
PhilipsK30Black band across screenVaries with tuning & agc Adj - Replace 3 electro caps in IF can14-09-04
PhilipsK30Blank raster - sound Ok.C1586 ( 100uf , 35v )14-09-04
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