| Make | Model | Problem | Solution | Date |
| | | |
| Found: 30
|
| Bush | 2720 | BRIGHTNESS CONTROL NOT WORKING 2 LOW HEIGHT 3 BR | TR901 SC ON TUBE BASE 2 D2801 33v ZENER SC 3 R901 ON TUBE BASE OC | 14-09-04 |
| Bush | 2720 | Lack of height | D801 ( 33V ) s/c | 14-09-04 |
|
|
| Bush | 2720 | Lack of width & corrugated verticals | HT smoothing cap C827 47µ 250v | 14-09-04 |
| Bush | 2720 | No brightness control - OSD works ok | Tr901 BC558 on crt base | 14-09-04 |
| Bush | 2720 11AK03 | Uncontrollable brightness & flyback lines. | R901 ( 220 ) on tube base o/c. | 14-09-04 |
| Grundig | CUC720 | Dark on bright scenes. | C2216 ( 1uf , 63v ) TDA5500 in IF or change can , C2541 ( 2.2uf | 14-09-04 |
| Grundig | CUC720 | Dead - blown 2.5amp fuse. | Bridge rectifiers/c D621 ( SKBB380 ) can use a BY179. | 14-09-04 |
| Grundig | CUC720 | Int. won't start, sound ok. | Change all small electrolytics on vertical/horizontal PCB. | 14-09-04 |
| Grundig | CUC720 | No frame. | C2768 ( 100uf ) leaky , R2771 ( 6R8 ) , field to TDA2653. | 14-09-04 |
| Grundig | CUC720 | No sound | R2408 ( 3.3R ) on sub PCB , TBA120T in IF must be a 120T | 14-09-04 |
| Grundig | CUC720 | Purity. | Th on small mains PCB , C601 ( 0.15uf , 250v ) | 14-09-04 |
| Grundig | CUC720 | Teletext - fault - Picture shows at same time | C2881 ( 1uf ) | 14-09-04 |
| Grundig | CUC720 | Won't start, PS squeals, relay remains open. | Change C655 100uF/25V cap. | 14-09-04 |
| Grundig | T51-720 | rolling / snowy no field sync | Dry joints rf/if module | 14-09-04 |
| Protech | 7206NT 11AK19-8A | E-W faulty - narrow, bowed pic | Dry jointed & o/c C630 430nF, when replaced took the FOP chip out. R629 2R7 safety res o/c, replaced TDA8351 FOP chip & L604 shorted turns (read 0R9 - should be approx 2R7) rewound with 393 turns - see also Bush 2871NTX | 14-09-04 |
| Sharp | C3720 | Int brill level & Height | Dry joint reg Q604 near mains sw | 14-09-04 |
| Sharp | C3720H | COMES ON THEN GOES STRAIGHT OFF into StBy | R521 3R9 OC also check D502 | 14-09-04 |
| Sharp | C3720H | No controls aft 2 hrs | Micro IX1559CEZZ | 14-09-04 |
| Sharp | C3720H | St/by only - EHT briefly at sw on | No supply to FOP stage - D502 & R521 in 24v supply faulty | 14-09-04 |
| Sharp | C3720H | Striations on picture & 'black fingers' | Lopt o/c pins 6 to 7. Can be replaced with HR7675. Short out Pin 8 to pin 5, then wrap the flying loose wire around the lopt 1 extra turn then fit in pins 11 & 12 reverse them if you get loud whistling ! | 14-09-04 |
| Sharp | C3720H | Tuning drift | IC1003 - used ZTK33 | 14-09-04 |
| Sharp | C3720H | Weak blue drive | D807 on small sub panel connected to crt base leaky (use 1N4148 in lieu) & TDA3566 dec chip | 14-09-04 |
|
|
| Sharp | C3720H 14A | Reverts to st/by at sw on | 122v HT to LOP but no line drive; R521 3R9 fusible res in FOP 24v supply o/c - check D502 | 14-09-04 |
| Sharp | C3720H 14A | St/by only after brief green LED | R521 3R9 in 24v supply o/c - next to LOPTx | 14-09-04 |
| Sony | KV2720 | Chopper transistor Sced after running for 10-15 mins. | Replace all electrolytics around uPC1394 | 14-09-04 |
| Toshiba | 1720RB | Dead | Dry joints scan coil plug | 14-09-04 |
| Toshiba | 1720RB | Dead - no line drive - HT present | LOPTx shorted turns | 14-09-04 |
| Toshiba | 1720RB | Dead 500mA fuse blackened | 6R8 7W surge lim o/c; Mains smoothing cap s/c; STRD4412 chopper s/c; R2M overvolts diode s/c - all caused by LOPTx | 14-09-04 |
| Toshiba | 1720RB | LINE TEARING WHEN WARM | Q801 STRD4412 Toshiba 23314510 | 14-09-04 |
| Toshiba | 1720RB | No brightness control | D204 1N4148 clamp diode leaky | 14-09-04 |