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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: 19
HitachiC2546TNBlank raster & no sound - ok via scartTuner type E710029 faulty14-09-04
HitachiC2546TNDeadalthough the line output transistor was reading OK is was breaking down on load14-09-04

HitachiC2546TNDeadQ903 ON4584 chopper Tr o/c, ZD901 4v7 zener & D905 1N4531 s/c14-09-04
HitachiC2546TNField collapsecheck for dry joints fusible res in psu14-09-04
HitachiC2546TNField collapseDry joint R710 near FOP chip (hidden by glue)14-09-04
HitachiC2546TNField faultR909 had a invisible dry joint14-09-04
HitachiC2546TNInt buzz esp at sw onL901 mains I/p filter choke14-09-04
HitachiC2546TNInt cuts outDry joints IC951 8v reg LM780814-09-04
HitachiC2546TNInt excess width - provoked by tappingQ752 BC558B breaking down14-09-04
HitachiC2546TNInt operation then deadCheck dry joints IC950, IC951, IC952 & if still faulty replace IC95014-09-04
HitachiC2546TNInt reverts to st/byDry joint on R956 to left of reg & check reg joints14-09-04
HitachiC2546TNINTETMITTANTLY CUTS OUTRESOLDER IC95114-09-04
HitachiC2546TNNo soundMemory chip replaced14-09-04
HitachiC2546TNRed cast to pic when col control increasedIC501 TDA4665 dig delay line chip14-09-04
HitachiC2546TNReverts to st/by aft a sec with "growling"Scan coils duff14-09-04
HitachiC2546TNSt/by LED lit - HT to LOP stage but no line driveDry joints Q950 reg (under plastic support)14-09-04
HitachiC2546TNSt/by onlyDrys on all regulators check frame ic replace 68k feed to ht pot and check the 12k next to it replace ht pot set ht to 152 volts and dry on R791 14-09-04
HitachiC2546TNStuck in st/by prot cct in operation12v supply low - ZD952 11v zener leaky14-09-04
HitachiC2546TNTrippingCheck R950 68k, R951 12k, R952 82k 1/2w & check for dry joints14-09-04
page: 1
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