| Make | Model | Problem | Solution | Date |
| | | |
| Found: 108
|
| Decca | DBS9892C | Int dead | Dry joints scart conn (12v routed thro it)- remove Nicam pcb | 14-09-04 |
| Decca | DBS9892C | Int dead | Dry joints RA50 & RA16 3w stand up res on audio o/p panel & check joints on 12v reg on main pcb | 14-09-04 |
| Decca | DBS9892C | Int sw off | Dry joints on Audio o/p pcb (12v goes in & out of this panel) & check joints on main pcb (esp regs) & to scart board. Also check/replace R817/819 220R ?w in pri psu & C812 100mfd, C807 100mfd & C806 100mfd | 14-09-04 |
| Decca | DBS9892C | No startup | R817 & R819 in the primary PSU stage (both
220R 0.5 watt) as they looked distressed & all the small caps in PSU (C812 100mfd, C807 100mfd & C806 100mfd) | 14-09-04 |
| Decca | DBS9892C | Thumping noise on audio | dry joints audio pcb | 14-09-04 |
| Decca | DBS9892C | Verticals ragged when cold | C418 470µ 35v o/c between T401 & SCART pcb | 14-09-04 |
| Mitsubishi | CT21AV1BS | col level int | Q704 JC501 blanking tr on main pcb | 14-09-04 |
| Mitsubishi | CT21AV1BS | Dead | All psu o/ps ok but no line drive - IC ST24C08 memory IC | 14-09-04 |
| Mitsubishi | CT21AV1BS | St/by only | C955 2200µ sec psu hi esr | 14-09-04 |
| Mitsubishi | CT25AV1BS | No sound - pic ok | reset eeprom settings from infomation provided by Darren Hoskin & Graham Cooke | 14-09-04 |
|
|
| Mitsubishi | CT25AV1BS EE3 | Blank raster with sound | Vid signal enters pin 42 IC201 but no o/ps - eventually found due to no 12v crt base - R514 0R82 1/2w safety res o/c | 14-09-04 |
| Mitsubishi | CT25AV1BS EE3 | Dead - off with burning smell - green LED perm lit | CSD3 470n 400v o/c - looks stressed cause of trouble. Also R510 100R 1/2w o/c - also replaced TEA2031A | 14-09-04 |
| Mitsubishi | CT25AV1BS EE3 | Field collapse | TDA8171 & R516 0R82 1/2w o/c | 14-09-04 |
| Mitsubishi | CT25AV1BS EE3 | No E/W or width control (after CSD3 470n replaced) | L504 burnt & shorted windings - rewound with 493 turns - also check TDA2013A E/W chip | 14-09-04 |
| Mitsubishi | CT28AV1BSD | Dead | C955 3300µ 16v & reprog EEPROM | 14-09-04 |
| Sharp | 37AM23H 5BSA | Service mode adjustments | Hold vol up, vol down & chan up buttons whilst switching on | 14-09-04 |
| Sharp | 37AM23H 5BSA | Snowy & buzzing - wont tune or prog properly | EEPROM IC1002 replacement reqd | 14-09-04 |
| Sharp | 4BS-B | lop tr blown replacement overheats | line drive incorrect. 5v supply at IC2801 low - IC751 KA7805PI faulty | 14-09-04 |
| Sharp | 4BSA | Int trip with front LED flashing | D602 1N4936 in psu | 14-09-04 |
| Sharp | 4BSA DV5161H | int. goes to stby | resolder blue tuning cap C610 near LOPTx | 14-09-04 |
| Sharp | 4BSA DV5161H | unstable line output from cold, no teletext | EEPROM IC1002 (CHIX1463CJHA), Q1010 BC338 o/c B-E, R604 3k3 0.33W o/c | 14-09-04 |
| Sharp | 4BSC | Dead after initial HT supply rise | IC600 forms part of trip cct. R645 1R 1W safety res o/c | 14-09-04 |
| Sharp | 4BSC | EHT dies away at sw on | R465 1R o/c supply to field chip usually - 12v reg this time | 14-09-04 |
| Sharp | 4BSC | Trips int with burning smell - brief field coll noticed | IC500 fop chip burnt, C506 100µ 25v faulty | 14-09-04 |
| Sharp | 4BSC 66AS05H | blank raster, OSD ok | SMD Q400 2SC2412/BC848 s/c (video buffer transistor) | 14-09-04 |
| Sharp | 4BSC 66AS05H | Dead | Lop tr Q600 2SD1546 u/s. Line drive wfm at C607 cramped - Q606 2SC2412 sm leaky | 14-09-04 |
| Sharp | 4BSC 66AS05H | Dead - LOPTr 2SD1546 failed | Replacement only lasted days - IC800 MC44002P line drive pin 12 only 1v instead of 3v - chip faulty. Also check state of Q601 2SC2271 dr tr & Q606 pre driver tr | 14-09-04 |
| Sharp | 4BSC 66AS05H | Dead - no line drive | IC800 MC44002 jungle chip faulty | 14-09-04 |
| Sharp | 4BSC 66AS05H | Dead with ticking | LOPTr s/c due to dry joints scan coil plug | 14-09-04 |
| Sharp | 4BSC 66AS05H | excessive width with E-W error | L601 shorted turns (RCILP0104CEZZ) | 14-09-04 |