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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 faulty14-09-04
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.14-09-04

Crown11AK08 CRV37Dead with BUZ77 chopper Q801 s/cR809, R805 330k & check/change C817, C831 1 50v & C812 47 16v14-09-04
Crown11AK19Dead - LOPTr s/cCheck scan coil conns to main board for dry joints/overheating14-09-04
Crown14CX25LOPTr failsLOP tuning cap 0.0022 2kv or C709/710 dry joints14-09-04
Crown14CX25No colourQ311 2SC65Y burst amp o/c14-09-04
Crown2196Dead.Check/Replace R108 220K Ohm & R109 330K Ohm.14-09-04
Crown2894Int field lin/bounce when heated12v at ZD402 low due to R435 0R68 risen in value14-09-04
CrownCPRP14Dead - Chopper FET 5N90 s/cR101 5R6 5w surge lim o/c, TDA4605 IC101, R108 220k, R109 330k o/c 14-09-04
CrownCR3797RDead with squealC612 22 50v & C611 47 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 width14-09-04
CrownCR5014Dead - Chopper tr BUT11AF Q101 s/cR121 3R3 ?w fusible o/c - D108 dry joints14-09-04
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 screen14-09-04
CrownCRP14/21Dead R599 2k 5w o/cCaused by line dr trfmr CROW602300033051 & replace line dr Tr14-09-04
CrownCRP14T SM1 MonoStuck in standby.R599 2k 5watt in PSU o/c , check Q579.14-09-04
CrownCRP21Child lock removals/c pins 4 & 17 of R/C. Press 'clear' then 'pass'. S/C pins again twice. To clear press 'clear'.14-09-04
CrownCRP21TdeadR599 2k 5w - replace Q579 too14-09-04
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 + TDA460514-09-04
CrownCRP21TDead Q101 PSU Chopper s/cR108 220k & R109 330k hi res14-09-04
CrownCRP21Tint dead2SC1573A line driver Q579 (may check ok)14-09-04
CrownCRP21TInt symbols showing when Micro & Xtal fitted with blank rasterFit D483 in its posn between micro & tuner/IF (No diode previously fitted)14-09-04
CrownCRP21TNo signalsR127 12k o/c14-09-04
CrownCRP21TPass Code - resettingopen hset if SAA3004P s/c pins 2+18; if KS51900-43 or OHS2015DN s/c pins 18 + D6; if GMS30150 9514 s/c pins 4&17. Sw on tv, press chan button so PASS displayed, insert R/C batts & point at tv. PASS CLEAR appears on tv. Remove R/C s/c to end set up.14-09-04

CrownCRP21T SM1 MonoStuck in standby.R599 2k 5watt in PSU o/c , check Q579.14-09-04
CrownCRP21T(S)Dead - internal fuse intact (due to power surge)Q101 BUZ90F, IC104 TDA4605 & R101 5R6 5w14-09-04
CrownCRP25NTE/W corr faultyQ57914-09-04
CrownCRT5912RTDead - LOPTr faultyreplacement ran hot - 10 50v cap in base faulty14-09-04
CrownCRV37DeadQ801 R805 R803 R809(.47 OHM FUSIBLE) IC 80114-09-04
CrownCRV37Streaky pic, dark on LH, bright on RHC608 1 250v decoupler14-09-04
CrownCRV37TrippingChopper tfmr14-09-04
CrownCRV47DeadR809 0R47 o/c, Chopper tfmr s/c under load tho' measured ok14-09-04
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