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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: 15
PanasonicZ4 ChassisBright green at sw on & int cuts outC350 on crt base14-09-04
PanasonicZ4 ChassisCol int low or absentC2651 0µ01 sm int o/c14-09-04

PanasonicZ4 ChassisComes on with field collapse - gradually opens up then int shuts downC462 470pF ceramic cap leaky in FOP cct14-09-04
PanasonicZ4 ChassisDead - blank raster when optocoupler overiddenNo activity from main micro - IC1202 EEPROM ST24C02A faulty14-09-04
PanasonicZ4 ChassisDead - surge lim res R802 4R7 5W o/cSTR54041M IC801 & Q801/2 s/c & D854 overvolts prot diode s/c. C809 0µ1feedback cap was the cause (caused excessive HT) also change C808 10µ 63v14-09-04
PanasonicZ4 ChassisDead after initial burst of lifeTrips even with LOP stage dis'd - fault in prot cct - Q558 2SA879 faulty tho checked ok out of cct14-09-04
PanasonicZ4 ChassisField int collapses or rollsC402 3µ3 tant cap in Field osc stage14-09-04
PanasonicZ4 ChassisInt loss of soundCheck conns to speakers14-09-04
PanasonicZ4 ChassisLetter "C" displayed towards left/centre of screenReset micro by pressing VOL- button on TV whilst pressing Timer button on Hset - Oks then displayed14-09-04
PanasonicZ4 ChassisNo sound and half a pic (shifted over)C503 0µ01 cap across line shift control leaky14-09-04
PanasonicZ4 ChassisNo syncComes from Txt board where IC3507 MAB8461-PW216 was faulty (dis pins 2 & 3 to check)14-09-04
PanasonicZ4 ChassisNo video with faint unsync lines in backgroundSync pulses leaving pin14 IC521 poor - 180pF cap connected to this pin leaky14-09-04
PanasonicZ4 ChassisSlight tuning drift, no sound, no Vol OSD (other OSD OK)Insufficient sync drive to Q1272 base. C524 180pF connected to pin 14 IC521 leaky14-09-04
PanasonicZ4 ChassisThe Panasonic Z4 ChassisSee TV Mag Sept - Nov 199414-09-04
PanasonicZ4 ChassisWhen chan stored in a prev stored location, all chans appear the sameCheck for dry joints around link J10 on Txt pcb14-09-04
page: 1
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