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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: 206
Fidelity3121St/by only - pin 2 LM317 chip I3 only 2v (sw 12v turned on by micro)Micro faulty - order under Amstrad part no 045101070201 (Mono model CTV322) & 045101070201 (stereo model CTV352)14-09-04
Fidelity3128NFInt blows mains fuse at sw onchange the degaussing thermistor to type 96209 as the original is designed for continental 220volt supplies14-09-04

Fidelity3128NFInt pic break upLine dr Tr replaced & increase feed res from 1 to 2k14-09-04
Fidelity3128NFRepeatedly blows LOPTrline driver tr Q580 (2SC1573), R608 1K R6102R2 & R609 from1K to 2K 5 watt.14-09-04
Fidelity3228No Txtreset the options in S/Mode. Opt1 read OX 03 changed to correct value OX OB Opt2 read OX 00 changed to correct value OX BO Had to then retune all stations then all OK14-09-04
FidelityC14M06Int field collapseD25 1N4002 pin 6 IC10 TDA3653 int o/c14-09-04
FidelityC59C27 KThick black horizontal bars from cold.C574 ( 100u f , 40v ) next to frame IC.14-09-04
FidelityCTM2000RLoss of sync when heatedC100 33 250v HT res cap (HT still measured ok at 119v)14-09-04
FidelityCTM2000TTripping10nf lop tuning cap burn up & BU508A lop tr leaky14-09-04
FidelityCTV140Dead - possible faint ticking heardCheck pin 9 TDA4600 - if pulsing up/down check for s/c on chopper sec - D21 (BY299 or RGP30) often cause14-09-04
FidelityCTV140Dead aft 10 minsLine freq increases due to C31 2n7 u/s14-09-04
FidelityCTV140Excess brill with f/b linesCheck R57 10R in dec chip supply & C100 4 350v in 160v RGB stage14-09-04
FidelityCTV1400Weak contrastR106 10k or 110k o/c- also check R113/111 100k if fitted 14-09-04
FidelityCTV1405RDeadD21 BY299 s/c & loadsa dry joints in PSU14-09-04
FidelityCTV1405RTuning erratic with buzz on soundAFT coil replaced14-09-04
FidelityCTV1406DeadHT = 130v at LOPtr - 0R68 safety res in series with line dr tr o/c & tr s/c14-09-04
FidelityCTV1406Drifts off tuneisolation diode slider no.5 tuning preset leaky14-09-04
FidelityCTV140RDead - chopper & LOPTr s/cOn/Off sw been arcing & burnt14-09-04
FidelityCTV14RSignals int & no chan 3ML923 tuning chip & tuner14-09-04
FidelityCTV14SNo soundNo volts pin 14 TDA3190 - D25 dry joint14-09-04
FidelityCTV20TNo soundNo volts at pin 13 IC3 TDA8190 - R59 100k in series with vol cont hi res14-09-04
FidelityCTV3014FDead - chopper tr BUZ91A s/c & 2A fuse o/cR4 270k o/c, TDA4605-3 replaced (use correct type)14-09-04

FidelityCTV3121NF 11AK12Faintly trippingD22 s/c (5v supply tfrom chopper trfrmr) & chopper transformer faulty14-09-04
FidelityCTV3128NDead - no line drivereplace Q580 (C1573A) and R609 1K 4W14-09-04
FidelityCTV3128NFDeadR609 (Change to 2k 5w), C620, Q580 & Q60214-09-04
FidelityCTV3128NFField collapseCheck R614 fusible - if OK check R340 3M3 for o/c connected to pin 43 IC101 vid proc chip (under screening can)14-09-04
FidelityCTV3128NFMains fuse blown for no apparent reasonCheck positor is Philips type 96209 not black one14-09-04
FidelityCTV3221NFDeadF01 2A o/c, Q1 2SK2545 s/c, Checked/replaced R5 680k & R4 270k tho checked ok, also replace TDA4650-3 & R1 5R6 5w o/c14-09-04
FidelityCTV3221NFInt line driveQ601 BF422 line dr tr replaced14-09-04
FidelityCTV3228Line collapseC620 047 250v scan coupling cap o/c & check R711 3R3 on E-W pcb14-09-04
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