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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: 44
B & OMX3500Crackling SoundDry joints audio o/p chips IC3 & 4 on PCB10 (bottom board)14-09-04
B&OMX3500crackling sounddry joints AF o/p chips IC3 & 4 on PCB10 (bottom)14-09-04

BushTV350Negative picture.Pulse winding o/c ( LOPTX )14-09-04
Cathay3501BLack of width & burning smellDry joints at line dr tr Q11014-09-04
CathayCTV3505Excessive blue.C503 leaky on CRT base.14-09-04
CathayCTV3505No line drive.L404 o/c.14-09-04
CathayCTV3505Red raster with flyback lines .C509 ( 330pf ) leaky on CRT PCB.14-09-04
Grundig3500 ChassisNo tuning , check pins 13 , 15 of tuner/IF for tuninIf stuck at 30v replace SDA3202 and SDA251614-09-04
GrundigCUC3500DEAD HT LOW AT 80v ( 196v )D635 SC14-09-04
GrundigCUC3500No sound/vis - +C volts low at 80v instead of 196vD635 BAT86 s/c14-09-04
GrundigCUC3500NO SOUND-VISIONCHECK D635 ( BAT86 ) SHORT14-09-04
GrundigCUC5350No sound at sw on; if vol + on R/C operated sound returns for duration of button pressAerial socket loose was reputed to be the cause !!! (socket came adrift)14-09-04
GrundigCUC5350white lines & 2 of each r-g-b- lines on top 3 ins of screenCheck HT & replace C538 47u 35v14-09-04
GrundigCUC5350 CUC5360"P1" DISPLAYED AFTER PROCESSOR CHANGEDR836 FROM 10K TO 22K ( OLD SDA 20562 A 006 NEW SDA 20562 A 506 Grundig 8305-157-580 )14-09-04
GrundigCUC7350"E" instead of "OK" shows when storingSw on with "Prog -" button depressed to clear "fault"14-09-04
GrundigCUC7350DeadChopper FET & control IC partial cure but all volts low until R60027/8 0R56 1w reistors replaced14-09-04
GrundigCUC7350Dead - 2.5A fuse blackenedT60020 IRFBC40 chopper tr s/c; D60013 1N4007 mains rect s/c; C60029 dry joints; R60023 1N4003 s/c; R60027 0R56 o/c14-09-04
GrundigCUC7350Dead - Chopper FET & 2 rect diodes s/cdry joint on C600 - blew again later due to arcing between FET & heatsink14-09-04
GrundigCUC7350Dead IRFBC40 chopper MOSFET failureDry joints C60029 470pf. Check R60027/28 0R46, R60022 10R, D6011-14 D60023-24 1N400714-09-04
GrundigCUC7350Int start upC60031 100µ 35v in psu14-09-04
GrundigCUC7350mains fuse o/c, BUZ chopper tr s/cdry joint C60029 470pf 1.6Kv also check D60011-14 & D60023/4 rects14-09-04
GrundigCUC7350No HT controlHT pot R60027 increased in value from 0R68 to 1R514-09-04

GrundigCUC7350No soundcheck sm trs to left of audio IC - mute sound in st/by & when told by micro - BC848C faulty in this case14-09-04
GrundigCUC7350St/by onlyLM317T reg s/c by its heatsink clip14-09-04
GrundigCUC7350TrippingR60027/28 0R46 gone hi res14-09-04
GrundigCUC7350Unstable HTR60028 0R68 o/c - check it out of cct!14-09-04
GrundigCUC7350Width varies with pic content - HT varies between 119-129vR60027 0R56 in curr sensing network - also check R60028 in parallel - values vary with screen size14-09-04
GrundigCUC7350Dead - +8v supply absentR61021 15R safety res in 8v reg o/c14-09-04
GrundigCUC7350Dead - mains fuse shatteredD60013/4 mains rects s/c, chopper FET T60020 IRFBC40 s/c used BUZ90 UC3843 replaced as prec,caused by dry joints chopper tfmr14-09-04
KENWOODKM3501TNO POWERCHECK RF SUPPRESSOR BETWEEN HV CAP AND MAGNETRON FOR DRY JOINTS14-09-04
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