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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: 131
Alba4859 11AK19No line drive at sw on (150v HT to LOPTr)Dis'd D814/815 (+14 & -14v audio o/p ic supply diodes). Replacing TDA2615 aud o/p chip resulted in bright white raster & flickering LED; R914 47R 200v feed to IC901 TDA6107Q on crt base o/c & IC s/c14-09-04
AlbaCTV4808 11AK19Comes on in st/by then if button pressed blinks pale greenCheck R914 47R safety res & TDA6108JK14-09-04

AlbaCTV4808 11AK19E3No tuning but tuning bar movesQ501 BF240 - BC548C works in this position14-09-04
AlbaCTV4851 11AK19Dead - no LED displayR806 22k o/c14-09-04
AlbaCTV4851 11AK19B-1Dead with 0nly 300v pri HTOpto coupler faulty - though more faults may be present (esp if it went off in a thunderstorm)14-09-04
AmstradWSTV7328NF 11AK19Narrow with E-W bowingR629 10R o/c - check for dry joints on caps14-09-04
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
Bush1495N 11AK19DeadR806 22k 1w safety res o/c14-09-04
Bush2031 11AK19-5Dead with no power ledHT only 60v - dis'd R823 to opto got HT up to 113v but with poor reg - C829 smoothing cap faulty14-09-04
Bush2571NTX 11AK19Blank raster, no sound, ok thro' SCART & OSD OKIC807 7805 regulator,supply was down to 2.5V14-09-04
Bush2571NTX 11AK19Bright green pic with fb linesTDA108JF on crt base14-09-04
Bush2571NTX 11AK19Field collapseCheck R704 100R safety res, if o/c change also TDA8351 FOP chip. Check 15v supply pin 3 IC701 if missing check comps from pin 6 LOPTx - D606 BA157 o/c14-09-04
Bush2571NTX 11AK19No pic, sound /text / menu and on screen graphics all work okQ500 and Q504 in metal can burnt out. No reason found14-09-04
Bush2571NTX 11AK19St/by only with psu ticking - HT about 50% of normalReplace R866 and R867 (0.33 ohms) psu secondary LT supplies14-09-04
Bush2571NTX 11AK19Tripping psuIC301 TDA6108JF(RGB chip) & R914 (1R) o/c both on CRT base & check LOPTr14-09-04
Bush2571NTX 11AK19E3Narrow pic with no E-W corr adjR629 safety res 2R7 1/2w feeding BUK444 o/c - C630 dry joint caused it14-09-04
Bush2863NTX 11AK19Dead - LOPTr s/cWhen replaced runs hot with bottom cogging - dry joint on link J61314-09-04
Bush2863NTX 11AK19E3Dead with HT of 16v - ok on dummy loadSupply to 5v reg missing - R867 0R33 o/c14-09-04
Bush2867NTX 11AK19Int off with smell of burningdry joints chopper trfmr14-09-04
Bush2867NTX 11AK19No line driveR866 0R33 in series with 14v supply o/c (not shown on cct diag)14-09-04

Bush2867NTX 11AK19Pic takes long time to appear - quicker if A1 adjustedCheck C608 10µ 250v reservoir cap for RGB stages by edge near LOPTx14-09-04
Bush2868NTX 11AK19Child Lock removalgo to the menu and toggle the child lock between on/off14-09-04
Bush2868NTX 11AK19DeadR806 22k o/c also R825 2M2 o/c14-09-04
Bush2868NTX 11AK19Dead with LOPTr s/cCheck conns to scan coil plug - if overheated, wire directly14-09-04
Bush2868NTX 11AK19E/W correction faultyQ683 FET BUK444 faulty14-09-04
Bush2868NTX 11AK19Entering service modeSelect "Install" then key in "4, 7, 2 & 5" via hset14-09-04
Bush2868NTX 11AK19No pic - sound ok - pic will appear briefly when adj A1C604 47nF 63V s/c in beam current14-09-04
Bush2868NTX 11AK19-5E/W faultyC630 470nF14-09-04
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