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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
PhilipsGR2.2Vertical lines on GR 2.2 - 90 degree narrow neck chassisPos.nr. 2588 becomes 3N3 (5322 122 33446) on main panel 14-09-04
PhilipsGR2.2Very low contrast in picture and text modes.If pin 15 of IC7309 is disconnected, contrast comes up. Fault suspected in BCL line. Disconnect D6315 to confirm. If contrast comes up with this diode disconnected (4822 130 80887), the fault is in the BCL circuit. Check/replace D6367 - 5.1 volt zener14-09-04

PhilipsGR2.2When sw on goes on/off with LED in sympathyIs heat & tap sensitive - Opto CRN50 (also could be zeners D6663 15v & D666 43v = 25"; 30v = 21" & D6592 30v & D6591 & D6560 1N4148 - many of these diodes are sm)14-09-04
PhilipsGR2.2Whistling LOT. Discharge is audible. Loudness depends on picture.As a result line output transistor becomes defective. Break earth pin A. This pin connects ferrite core to earth via spring. Cut as close to the plastic holder as possible. This pin is not in the Service Manual. REMARKS : From week 9223 onwards transf14-09-04
PhilipsGR2.2White picture with fly-back lines and shuts off.DC level output signal IC7309 (TDA4680) is too high. Check IC7309 (4822 209 63733).14-09-04
PhilipsGR2.2Will not go into Standby, pulsating frame collapse appears.This fault was found to be caused by D6465 being short circuit. This zener diode is in the Line- Osc stage. 4822 130 80239 8V2 zenerdiode 4822 130 61219 10V zenerdiode 4822 130 34281 15V zenerdiode14-09-04
PhilipsGR2.2 / 2.4AAWon't sw on. 148v is 75vC 2550 (680nF/250 V) low cap +fuse 1534(315mA)+D 6561 (BZX56C68)14-09-04
PhilipsGR2.2 21ST2731/05pic shifted to one side and one half of screen is blankIC7470 TDA2579B14-09-04
PhilipsGR2.2 25MN1550No line or field syncIC7470 TDA2579B tbase gen chip u/s - caused by arcing LOPTx14-09-04
PhilipsGR2.2 25PT410Dead - LOPTr goes s/c in secsDry joints scan coil panel14-09-04
PhilipsGR2.2 28PT482A/05Dead with faint tripping from psu - works ok on dummy loadLOPTr s/c & when replaced, sparks from LOPTx14-09-04
PhilipsGR2.2 28PT482A/05Field collapse, lack of width, no sound & red led flickers in sympathy with line on screenNo 14E supply pin 1 jungle chip. Check CP1580 1.6A & diode 658014-09-04
PhilipsGR2.2 28ST2781Dead with slow trippings/c across HT due to C2545 1n5 2kv burnt14-09-04
PhilipsGR2.2**SER on screen even after set to standbyZD6705 BZV55 to pin 18 of micro.14-09-04
PhilipsGR2.2AAPulse on & Off when cold - ok when heatedC2559 100µ 25v & CNR50 opto coupler14-09-04
PhilipsGR2.2AA5 mins for pic to come onclean discharge on crt base14-09-04
PhilipsGR2.2AAFlaring reds after loptx changewrong type loptx fitted14-09-04
PhilipsGR2.2AA 21ST2730/05No sound/poor sync - improves with timeC2072 a 2.2mfd cap was OC on Nicam IF module14-09-04
PhilipsGR2.2AA 25MN1550LOPTr destroyed every few days/weeksVaryation in hor phasing - TDA2579B timebase gen chip14-09-04
PhilipsGR2.2AA 25PT410Dead - LOPTr s/cCaused by dry joint line scan coils14-09-04
PhilipsGR2.2AA 25PT532A/05Tripping - HT only 100v & LT lines about 1/2 normal6670 Thy TAGEO102AA, will start if gate dis'd or Thy removed14-09-04
PhilipsGR2.2AA 25ST2761Dead with quiet trippingC2611 68uF 25v in psu pri hi esr14-09-04

PhilipsGR2.2AA 28ST2781/05BTrips once per sec with led flashing in sympathyDoesn't trip with scan coils removed - Check fuse 1534 315mA14-09-04
PhilipsGR2.3After a while colourspot left upper corner.Picture tube defective A51EAK02X05. Codenr. 4822 131 2060314-09-04
PhilipsGR2.3Fly-back lines visible and too bright. Pict. reacts on bending TXTCheck capacitor C2503 (10 nF SMD; 4822 122 32442) on TXT-PCB 14-09-04
PhilipsGR2.3Fly-back lines visuable when adjusting focus voltage. VG2 changes.Leak inside picture tube between Focus/VG2. Repair pict.tube by artificial flash.14-09-04
PhilipsGR2.3Geometry cannot be aligned wellReplace 3522 by 10 kOhm (4822 100 10436) or if not present, cut coppertrack between 3557 and 3559, place there 3522 (10 kOhm; 4822 100 10436) on the Teletext module. Replace 3557 by 4,7 kOhm (4822 051 10472) on the teletext module. R3522 is a potentiomete14-09-04
PhilipsGR2.3Geometry not correct (trapezium)Replace 2522 on CRT module by 560nF (4822 121 51412)14-09-04
PhilipsGR2.3Horizontal centering not OK (16x9 sets)Replace on TXT-panel R3501 by 180 KOhm (4822 051 10184), R3502 by 39 KOhm (4822 051 10393), R3518 by 12 KOhm (4822 051 10123). Only for TXT-panel (4822 212 30991): West-Europe sets change R3557 by 6,8 KOhm (4822 051 66820)14-09-04
PhilipsGR2.3Horizontal lines in the top of the picture on white or blue pictureReplace sops transformator pos.nr. 5625 by 4822 148 81348 REMARKS : introduced in production from week 9444 onwards14-09-04
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