| 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) | 14-09-04 |
| 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 | 14-09-04 |
| Fidelity | 3128NF | Int pic break up | Line dr Tr replaced & increase feed res from 1 to 2k | 14-09-04 |
| Fidelity | 3128NF | Repeatedly blows LOPTr | line driver tr Q580 (2SC1573), R608 1K R6102R2 & R609 from1K to 2K 5 watt. | 14-09-04 |
| 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 | 14-09-04 |
| Fidelity | C14M06 | Int field collapse | D25 1N4002 pin 6 IC10 TDA3653 int o/c | 14-09-04 |
| Fidelity | C59C27 K | Thick black horizontal bars from cold. | C574 ( 100u f , 40v ) next to frame IC. | 14-09-04 |
| Fidelity | CTM2000R | Loss of sync when heated | C100 33µ 250v HT res cap (HT still measured ok at 119v) | 14-09-04 |
| Fidelity | CTM2000T | Tripping | 10nf lop tuning cap burn up & BU508A lop tr leaky | 14-09-04 |
| 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 | 14-09-04 |
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|
| Fidelity | CTV140 | Dead aft 10 mins | Line freq increases due to C31 2n7 u/s | 14-09-04 |
| Fidelity | CTV140 | Excess brill with f/b lines | Check R57 10R in dec chip supply & C100 4µ 350v in 160v RGB stage | 14-09-04 |
| Fidelity | CTV1400 | Weak contrast | R106 10k or 110k o/c- also check R113/111 100k if fitted | 14-09-04 |
| Fidelity | CTV1405R | Dead | D21 BY299 s/c & loadsa dry joints in PSU | 14-09-04 |
| Fidelity | CTV1405R | Tuning erratic with buzz on sound | AFT coil replaced | 14-09-04 |
| Fidelity | CTV1406 | Dead | HT = 130v at LOPtr - 0R68 safety res in series with line dr tr o/c & tr s/c | 14-09-04 |
| Fidelity | CTV1406 | Drifts off tune | isolation diode slider no.5 tuning preset leaky | 14-09-04 |
| Fidelity | CTV140R | Dead - chopper & LOPTr s/c | On/Off sw been arcing & burnt | 14-09-04 |
| Fidelity | CTV14R | Signals int & no chan 3 | ML923 tuning chip & tuner | 14-09-04 |
| Fidelity | CTV14S | No sound | No volts pin 14 TDA3190 - D25 dry joint | 14-09-04 |
| Fidelity | CTV20T | No sound | No volts at pin 13 IC3 TDA8190 - R59 100k in series with vol cont hi res | 14-09-04 |
| Fidelity | CTV3014F | Dead - chopper tr BUZ91A s/c & 2A fuse o/c | R4 270k o/c, TDA4605-3 replaced (use correct type) | 14-09-04 |
| Fidelity | CTV3121NF 11AK12 | Faintly tripping | D22 s/c (5v supply tfrom chopper trfrmr) & chopper transformer faulty | 14-09-04 |
| Fidelity | CTV3128N | Dead - no line drive | replace Q580 (C1573A) and R609 1K 4W | 14-09-04 |
| Fidelity | CTV3128NF | Dead | R609 (Change to 2k 5w), C620, Q580 & Q602 | 14-09-04 |
| Fidelity | CTV3128NF | Field collapse | Check R614 fusible - if OK check R340 3M3 for o/c connected to pin 43 IC101 vid proc chip (under screening can) | 14-09-04 |
| Fidelity | CTV3128NF | Mains fuse blown for no apparent reason | Check positor is Philips type 96209 not black one | 14-09-04 |
| Fidelity | CTV3221NF | Dead | F01 2A o/c, Q1 2SK2545 s/c, Checked/replaced R5 680k & R4 270k tho checked ok, also replace TDA4650-3 & R1 5R6 5w o/c | 14-09-04 |
| Fidelity | CTV3221NF | Int line drive | Q601 BF422 line dr tr replaced | 14-09-04 |
| Fidelity | CTV3228 | Line collapse | C620 0µ47 250v scan coupling cap o/c & check R711 3R3 on E-W pcb | 14-09-04 |