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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: 626
Bush11AK12Field collapseR818 22K in the 33V supply (yes the 33V supply). After changing this you will probably have a blank raster so change C707 100MFD in the field flyback circuit.14-09-04
Bush11AK12-9Width & E/W inopR661 100k14-09-04

Bush11AK19No start upNo line drive - check coil in emitter of LOPTr for burn up (not shown on cct)14-09-04
Bush11AK19Service Mode accessEnter install mode then press "4, 7, 2, 5"14-09-04
Bush11AK19-B1Field collapseAfter trying new chip TDA8351 which made no diff, fault traced to D606 BA157 which checked ok out of cct14-09-04
Bush1400DEAD ( P.SUPPLY IN BURST MODE )ZD 601 LEAKY14-09-04
Bush1402Int shuts downAll volts present, no line drive - 500hz resonator pin 19 IC301dry joint14-09-04
Bush1407Chans can't be storedThe -30v to memory chip low at -12v. C602 1nF small, green cap decoupling zener leaky14-09-04
Bush1407DeadR901 4R7 5w o/c, C903/4 caps across bridge rect s/c 4n7 500v14-09-04
Bush1407DeadR913 oc14-09-04
Bush1407sound dist - sounds like spkr but isn'tadd 01 cap from pin 5 of IC201 KA2201 (TBA820M) to chassis 14-09-04
Bush1407 (Onwa)bad audio distortion which at first sounded like a faulty spkr.Despite replacing this, the audio o/p ic IC201 KA2201 (TBA820M) and variouscaps around it the fault remained. adding a 0.1mfd cap from the o/p of the ic (pin 5) to chassis, this completely cured the fault14-09-04
Bush1408Excess heightR240 10k or18k hi res14-09-04
Bush1408Lack of heightR240 10k or 18k hi res14-09-04
Bush1418Dead - no st/by ledR913 330k14-09-04
Bush1427TBlue screen with fb lines18k on crt base14-09-04
Bush1427Tbright screen with fb lines check crt cathodes - if low at 100v check R435 0R68 safety res14-09-04
Bush1430R/C not workingIf TFMS 1340 or 1360 IR sensor reciever used then its probably faulty14-09-04
Bush1433BLANK SCREEN WITH THREE LINES AT TOP L/H SIDE THEN UNIT SHUTS DOWNINPUT ANTI-THEFT PASSWORD WITH REMOTE OR CONTACT TECHNICAL FOR PASSWORD14-09-04
Bush1433DeadR804 820k start up resistor o/c14-09-04
Bush1433DeadR809 0R47 o/c, R805 330k ?w o/c, Q801 BUZ77B s/c14-09-04
BUSH1433DEADREPLACE R809 0.47OHMS14-09-04

Bush1433DEADREPLACE R802 75K2W14-09-04
Bush1433Dead - chopper FET BUZ77B s/c, R809 0R47 o/cChopper tfmr HR910414-09-04
Bush1433dead - primary ht onlyR804 820k o/c14-09-04
Bush1433offchopper tfmr faulty caused demise of R809 4R7? Q801 FET BUX77B & TDA460514-09-04
Bush1433off with BUZ77B s/c & 0R47 o/creplace BUZ77B, TDA4605-2, 0R47, check R805 330K R803 820k and caps also for s/c pri winding of chopper tfmr14-09-04
Bush1433Small pic HT low at 89vHT res cap 47 160v hot & bothered14-09-04
Bush1433St/by onlyCheck R804 330k & R805 820k in psu, FET & TDA4506. Also, if front buttons broken, punter may have damaged connections to print around X501 14-09-04
Bush1433When replacing TDA4605If after replacement, st/by LED flashes & difficult to turn on - also 112v HT low at 107v try a different TDA4605- it worked for me!14-09-04
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