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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: 39
Crown11AK08deadR809 0R47 o/c, Chopper tfmr TR802 faulty14-09-2004
Crown11AK08Dead with R809 0R47 in psu burntUsually caused by chopper tfmr TR801 s/c turns. D810 26 & 12v supply diode s/c. HT high at 126v (110v). R805 330k 1w o/c.14-09-2004
Crown11AK08 CRV37Dead with BUZ77 chopper Q801 s/cR809, R805 330k & check/change C817, C831 1µ 50v & C812 47µ 16v14-09-2004
Crown11AK19Dead - LOPTr s/cCheck scan coil conns to main board for dry joints/overheating14-09-2004
Crown14CX25LOPTr failsLOP tuning cap 0.0022µ 2kv or C709/710 dry joints14-09-2004
Crown14CX25No colourQ311 2SC65Y burst amp o/c14-09-2004
Crown2196Dead.Check/Replace R108 220K Ohm & R109 330K Ohm.14-09-2004
Crown2894Int field lin/bounce when heated12v at ZD402 low due to R435 0R68 risen in value14-09-2004
CrownCPRP14Dead - Chopper FET 5N90 s/cR101 5R6 5w surge lim o/c, TDA4605 IC101, R108 220k, R109 330k o/c 14-09-2004
CrownCR3797RDead with squealC612 22µ 50v & C611 47µ 40v hi esr, 2SD5071 LOPTr leaky used 2SD1651 in lieu, line dr tr 2SC2330 s/c now would work except CRT is soft! Used 2nd hand crt to complete repair & replace C319 with 4n7 2kv to increase width14-09-2004
CrownCR5014Dead - Chopper tr BUT11AF Q101 s/cR121 3R3 ?w fusible o/c - D108 dry joints14-09-2004
CrownCRP14 Matsui 2096Child Lock removalConnect a tact switch between pin 4 & 17 of IC1 (in r/c) . When TV is sw on via R/C & a chan is selected that has a PASS code no. (child lock) will allow access approx 1 sec after pressing the tact switch once. The pass channel will clear & pic will return. To remove child lock permanently press tact switch again a message "PASS CLEAR" will appear on screen14-09-2004
CrownCRP14/21Dead R599 2k 5w o/cCaused by line dr trfmr CROW602300033051 & replace line dr Tr14-09-2004
CrownCRP14T SM1 MonoStuck in standby.R599 2k 5watt in PSU o/c , check Q579.14-09-2004
CrownCRP21Child lock removals/c pins 4 & 17 of R/C. Press 'clear' then 'pass'. S/C pins again twice. To clear press 'clear'.14-09-2004
CrownCRP21TdeadR599 2k 5w - replace Q579 too14-09-2004
CrownCRP21TdeadQ101 BUZ77 FET chopper s/c, R101 5R6 5w o/c, R108 220k, R109 330k hi res. Also check chopper tfmr for leaky feedback windings + TDA460514-09-2004
CrownCRP21TDead Q101 PSU Chopper s/cR108 220k & R109 330k hi res14-09-2004
CrownCRP21Tint dead2SC1573A line driver Q579 (may check ok)14-09-2004
CrownCRP21TInt symbols showing when Micro & Xtal fitted with blank rasterFit D483 in its posn between micro & tuner/IF (No diode previously fitted)14-09-2004
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