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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

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Found: 1049



PanasonicAlpha 2WBlowing line transistors.Drys on line driver transformer.14-09-2004
PanasonicAlpha 2WDeadNo volts pin 2 IC801 chopper; check R803 & R827 220k14-09-2004
PanasonicAlpha 2WDead - IC1204 (st/by 5v reg) overheats with only 1v on o/pzener D171 MA4082 is leaky, microprocessor IC1203 MAB8461PW134 is faulty.14-09-2004
PanasonicAlpha 2WDead - loptr 2SD1441 s/c, R567 1A link o/cNew parts went way of originals - HT high due to STR54041; also damaged CITAC chip SAB3035 causing blank raster/no sound via aerial or AV14-09-2004
PanasonicAlpha 2WDEAD check for 0.4V pin 2 IC801 if missingCHECK R803 AND R827 ( 220K ) if ok replace R815 ( 5R6 ) Q801 & Q802 & STR5404114-09-2004
PanasonicAlpha 2WE-W distL752 s/c or C754 180pF leaky in base to Q75114-09-2004
PanasonicAlpha 2WExcess width & no E?WCrack in print by pin 1 LOPTx14-09-2004
PanasonicAlpha 2WFaint line shading down right hand side.C858 ( 1 , 000uf , 25v ) leg not through PCB.14-09-2004
PanasonicAlpha 2WField collapseIC501 TDA2579A & check C403 001 pin 2 IC for leak14-09-2004
PanasonicAlpha 2WGoes bright red then trips offQ353 red o/p tr coll drops to 3.5v - L353 180H coil o/c14-09-2004
PanasonicAlpha 2WLine output transistor scCheck for dry joints on line drive tx ( often invisible )14-09-2004
PanasonicAlpha 2WLines on pic & whistleSTR50401 - use genuine replacement14-09-2004
PanasonicAlpha 2Wno picture, only blank rasterL303 10uF o/c in 12V supply. I found leaky zener D171, after replacing it the IC1204 was still running hot, but with 4 volts on the output at this time. When I disconnected pin28 of microprocessor, the supply was at 5 volts and the regulator wasn't hot. pin28 measured 1kOhm to ground. When a new chip arrived, it measured 1kOhm as well, the only difference is when you freeze the faulty IC, resistance goes up to 3kOhm, when you freeze the new IC, resistance goes down to 0.4kOhm. After replacing the micro controller, IC1204 5v regulator was running cold. The micro controller was 15 UK pounds +VAT from HRS.14-09-2004
PanasonicAlpha 2WNo signals - R/C functs slow & erraticTuner faulty even tho connecting ext dc supply to BT pin produced signals (prescaler fault) - repaired at MCES - RC slow operation normal with lack of sigs14-09-2004
PanasonicAlpha 2WNo sound or vision - heaters & EHT presentChoke L853 TLT030L119C attached to 12v reg o/c14-09-2004
PanasonicAlpha 2Wnon lin top of field scan or portion missingR469 underneath R551 10R 7w - could be either 150R, 270R or 470R 1w14-09-2004
PanasonicAlpha 2WPic pulling to rightdry joints line dr tfmr14-09-2004
PanasonicAlpha 2WPOOR WASHED OUT PIC , NORMAL SOUND . MAY BE JUST BLC626 10nf - DECOUPLING PIN 19 TDA350514-09-2004
PanasonicAlpha 2WPowers up but shuts down , prog No remains , shortL303 oc14-09-2004
PanasonicAlpha 2WScreaming PSU onlyHT 175v (158v) - R567 o/c, C808 10 50v leaky14-09-2004
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