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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: 23
JVCC14E1EKBright picZD30114-09-04
JVCC14E1EKDeadC907 small disc cap 0µ1? burnt & R901 4R7 5w o/c14-09-04

JVCC14E1EKDead - st/by onlyZD402 s/c; replace the following:- ZD402, R423, C909, ZD902, C911, ZD901, D408 to prevent HT rising & blowing parts again14-09-04
JVCC14E1EKDist soundC143 10µ o/c in dc vol contr feed to pin 14 IC10114-09-04
JVCC14E1EKFAINT HORIZONTAL LINE AT BOTTOM OF SCREENREPLACE R434 0.047 OHM14-09-04
JVCC14E1EKField collapse25v supply to fop chip LA7830 IC401 missing - R433 0R68 o/c & C424 4n7 500v leaky (measured ok out of cct)14-09-04
JVCC14E1EKfield collapse after psu repairspeaker plug connected to service pins by mistake14-09-04
JVCC14E1EKField o/p chip IC401 LA7830 int destroyedVR901 2k HT preset int - causing HT to int rise14-09-04
JVCC14E1EKFRAME COLLAPSECHECK R335 180K FOR O/C14-09-04
JVCC14E1EKIncorrect AGCC12414-09-04
JVCC14E1EKInt destruction of fop chip (IC401 LA7830)Replace VR901 (2K) +B preset. 14-09-04
JVCC14E1EKLine TearingC63214-09-04
JVCC14E1EKNo TxtSAA5243P/E on Txt pcb faulty14-09-04
JVCC14E1EKSt/by onlyC406 220µ 25v14-09-04
JVCC14E1EKStuck in StBy , relay clicks but no go . Or very rarely comes on and then goes to StBy after 3-4 mins .R323 6K8 5w fusible OC.14-09-04
JVCC14E1EKTuning driftC116 sm cap - also check other sm electrolytics whilst tuner out14-09-04
JVCC14E1EK (Onwa)St/by only - can be intlop stage 12v low at 11.5v - R434 0R68 hi res at 1R214-09-04
JVCC14E1EK OnwaDeadAfter replacement of usual caps the mains smoother C907 4700pF 500v in psu pri was found to be leaky14-09-04
JVCC14E1EK OnwaDead - HT highC909/911 47µ cured HT problem but still dead; No supply pin 42 AN5601K dec/tb chip IC301. R323 6k8 5w fusible o/c14-09-04
JVCC14E1EK OnwaDead - no st/byQ902 2SB774 base emitter s.c. (used BC558).14-09-04
JVCC14E1EK OnwaInt snowy pic at sw on with no OSD or R/C functsOK once TMS73C47 micro reset (s/c pin 32 to chassis briefly). Caused by crack in print at front edge of pcb on track to pin 2 micro - hard to see due to covered in black ink14-09-04
JVCC14E1EK OnwaNo goR323 ( 6k8 5watt ) fusible resistor o/c between p42 of IC301 & HT rail.14-09-04

JVCC14E1EK OnwaSet comes on to standby - relay clicks.R323 ( 6k8 5watt ) fusible resistor o/c ( maybe Int ) between p42 of IC301 & HT rail.14-09-04
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