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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
Make
Model
Problem
Solution
Date
Found: 206
Fidelity
3121
St/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)
14-09-2004
Fidelity
3128NF
Int blows mains fuse at sw on
change the degaussing thermistor to type 96209 as the original is designed for continental 220volt supplies
14-09-2004
Fidelity
3128NF
Int pic break up
Line dr Tr replaced & increase feed res from 1 to 2k
14-09-2004
Fidelity
3128NF
Repeatedly blows LOPTr
line driver tr Q580 (2SC1573), R608 1K R6102R2 & R609 from1K to 2K 5 watt.
14-09-2004
Fidelity
3228
No Txt
reset 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 OK
14-09-2004
Fidelity
C14M06
Int field collapse
D25 1N4002 pin 6 IC10 TDA3653 int o/c
14-09-2004
Fidelity
C59C27 K
Thick black horizontal bars from cold.
C574 ( 100u f , 40v ) next to frame IC.
14-09-2004
Fidelity
CTM2000R
Loss of sync when heated
C100 33µ 250v HT res cap (HT still measured ok at 119v)
14-09-2004
Fidelity
CTM2000T
Tripping
10nf lop tuning cap burn up & BU508A lop tr leaky
14-09-2004
Fidelity
CTV140
Dead - possible faint ticking heard
Check pin 9 TDA4600 - if pulsing up/down check for s/c on chopper sec - D21 (BY299 or RGP30) often cause
14-09-2004
Fidelity
CTV140
Dead aft 10 mins
Line freq increases due to C31 2n7 u/s
14-09-2004
Fidelity
CTV140
Excess brill with f/b lines
Check R57 10R in dec chip supply & C100 4µ 350v in 160v RGB stage
14-09-2004
Fidelity
CTV1400
Weak contrast
R106 10k or 110k o/c- also check R113/111 100k if fitted
14-09-2004
Fidelity
CTV1405R
Dead
D21 BY299 s/c & loadsa dry joints in PSU
14-09-2004
Fidelity
CTV1405R
Tuning erratic with buzz on sound
AFT coil replaced
14-09-2004
Fidelity
CTV1406
Dead
HT = 130v at LOPtr - 0R68 safety res in series with line dr tr o/c & tr s/c
14-09-2004
Fidelity
CTV1406
Drifts off tune
isolation diode slider no.5 tuning preset leaky
14-09-2004
Fidelity
CTV140R
Dead - chopper & LOPTr s/c
On/Off sw been arcing & burnt
14-09-2004
Fidelity
CTV14R
Signals int & no chan 3
ML923 tuning chip & tuner
14-09-2004
Fidelity
CTV14S
No sound
No volts pin 14 TDA3190 - D25 dry joint
14-09-2004
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