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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: 901
HitachiC28W1TNTrips aft 5 secs after trying to start upFOPTr TDA8350Q was faulty - removing it makes no diff to symptoms HT should be approx 152v with Philips/LG crt14-09-04
HitachiC28W1TN A7Excess height - unable to enter serv modeCan be altered using EEPROM programmer - address 171H is the location14-09-04

HitachiC28W1TN A7Service mode enteringSet to Chan 44 & press "Status" button(I or +) then mute & TV14-09-04
HitachiC28W1TN-311DeadR950 68k o/c, Q954 s/c, BU2508AF LOPTr s/c - psu will work for checking if loaded with 2k2 10w14-09-04
HitachiC28W511NInt tripsHT pot 1k, 68k feed res & check for dry joints14-09-04
HitachiC28WD2TNDead - previously int shut downLOPTr had a pin hole in it & was arcing to heatsink in use14-09-04
HitachiC28WD2TNdotted vertical contours of pic featuresC875 22µ 250v dry jointed14-09-04
HitachiC28WD2TNDull red raster onlyCheck R807/8/9 560r cathode feed resistors - if burnt out s/c crt is suspect14-09-04
HitachiC28WD2TNGoes off aft 5 minscheck sleep timer isn't set & dry joints on 5v regs - if HT is high(above 150v) check R950 & HT pot VR950 (under plastic frame)14-09-04
HitachiC28WD2TNInt start up then shuts down 2 secs aft start up with greenish picR809 560R ?w burnt out, Q814 BF422 leaky14-09-04
HitachiC28WD2TNSound intdry joints on the component side of the PCB adjacent to the sound output chip.14-09-04
HitachiC28WD2TNSt/by onlyR914 1k, Q901 T636073, Q902 T636072, ZD902 BZV85C18V, ZD903 BZV85C27V14-09-04
HitachiC28WD2TNSwitches on then immediately powers downTDA8350Q and re-solder 5v reg's IC951/952 14-09-04
HitachiC28WD2TNVery faint raster only could be seen with lights offPic appeared with A1 advanced but no R - crt internal fault14-09-04
HitachiC28WITN311Sw off straight after sw onR807 & Q816 on CRT base faulty but replacements did not cure - clean pins IC400 TDA9875A did14-09-04
HitachiC2964TNNo E-W & excess widthIC601 TDA8350Q14-09-04
HitachiC2976TNDeadC703 10nF 2Kv bulged & faulty14-09-04
HitachiC2976TNDead - BU2508AF s/cC703 12nF 2kv o/c14-09-04
HitachiC2976TNDead - went off with a bangQuietly ticking noticed - mains smoothing cap 200µ 400v o/c14-09-04
HitachiC2976TNE/W int errorsDry joints L75214-09-04
HitachiC2976TNField - no scan at top just a few fback linesIC501 TDA9160A14-09-04
HitachiC2976TNInt flyback lines on dark scenesCRT int bad con on A1 electrode14-09-04

HitachiC2976TNPic shifted laterally with ragged verts & arcing soundTDA8350Q14-09-04
HitachiC2976TNTo remove version no. from screenPress ESC on the handset to display the service mode menu Press Standby Power back on whilst holding Vol+ and Vol- Without following the first two steps the procedure did not work14-09-04
HitachiC2976TNTo remove version no. from screenPress ESC on the handset to display the service mode menu Press Standby Power back on whilst holding Vol+ and Vol- Without following the first two steps the procedure did not work14-09-04
HitachiC2976TN A5E/W faultyL751 dry joints IC601 TDA8350Q faulty14-09-04
HitachiC2976TN A5Lines at top of pic44v supply to IC601 pin 8 from LOP low at 25v. Check D718/9 BY33J & C725 33nF 400v for o/c14-09-04
HitachiC2977TNDead aft initial burst of EHTC704 2n2 2Kv leaky & burnt - looked ok in cct14-09-04
HitachiC2984TNInt heightR605 50k height pot int on small panel with 3 other pots14-09-04
HitachiC32W2TNDead - blows LOPTrLOPTx14-09-04
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