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Repair tips

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: 108
DeccaDBS9892CInt deadDry joints scart conn (12v routed thro it)- remove Nicam pcb14-09-04
DeccaDBS9892CInt deadDry joints RA50 & RA16 3w stand up res on audio o/p panel & check joints on 12v reg on main pcb14-09-04

DeccaDBS9892CInt sw offDry 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 100mfd14-09-04
DeccaDBS9892CNo startupR817 & 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
DeccaDBS9892CThumping noise on audiodry joints audio pcb14-09-04
DeccaDBS9892CVerticals ragged when coldC418 470µ 35v o/c between T401 & SCART pcb14-09-04
MitsubishiCT21AV1BScol level intQ704 JC501 blanking tr on main pcb14-09-04
MitsubishiCT21AV1BSDeadAll psu o/ps ok but no line drive - IC ST24C08 memory IC14-09-04
MitsubishiCT21AV1BSSt/by onlyC955 2200µ sec psu hi esr14-09-04
MitsubishiCT25AV1BSNo sound - pic okreset eeprom settings from infomation provided by Darren Hoskin & Graham Cooke14-09-04
MitsubishiCT25AV1BS EE3Blank raster with soundVid signal enters pin 42 IC201 but no o/ps - eventually found due to no 12v crt base - R514 0R82 1/2w safety res o/c14-09-04
MitsubishiCT25AV1BS EE3Dead - off with burning smell - green LED perm litCSD3 470n 400v o/c - looks stressed cause of trouble. Also R510 100R 1/2w o/c - also replaced TEA2031A14-09-04
MitsubishiCT25AV1BS EE3Field collapseTDA8171 & R516 0R82 1/2w o/c14-09-04
MitsubishiCT25AV1BS EE3No E/W or width control (after CSD3 470n replaced)L504 burnt & shorted windings - rewound with 493 turns - also check TDA2013A E/W chip14-09-04
MitsubishiCT28AV1BSDDeadC955 3300µ 16v & reprog EEPROM14-09-04
Sharp37AM23H 5BSAService mode adjustmentsHold vol up, vol down & chan up buttons whilst switching on14-09-04
Sharp37AM23H 5BSASnowy & buzzing - wont tune or prog properlyEEPROM IC1002 replacement reqd14-09-04
Sharp4BS-Blop tr blown replacement overheatsline drive incorrect. 5v supply at IC2801 low - IC751 KA7805PI faulty14-09-04
Sharp4BSAInt trip with front LED flashingD602 1N4936 in psu14-09-04
Sharp4BSA DV5161Hint. goes to stbyresolder blue tuning cap C610 near LOPTx14-09-04
Sharp4BSA DV5161Hunstable line output from cold, no teletextEEPROM IC1002 (CHIX1463CJHA), Q1010 BC338 o/c B-E, R604 3k3 0.33W o/c14-09-04
Sharp4BSCDead after initial HT supply riseIC600 forms part of trip cct. R645 1R 1W safety res o/c14-09-04

Sharp4BSCEHT dies away at sw onR465 1R o/c supply to field chip usually - 12v reg this time14-09-04
Sharp4BSCTrips int with burning smell - brief field coll noticedIC500 fop chip burnt, C506 100µ 25v faulty14-09-04
Sharp4BSC 66AS05Hblank raster, OSD okSMD Q400 2SC2412/BC848 s/c (video buffer transistor)14-09-04
Sharp4BSC 66AS05HDeadLop tr Q600 2SD1546 u/s. Line drive wfm at C607 cramped - Q606 2SC2412 sm leaky14-09-04
Sharp4BSC 66AS05HDead - LOPTr 2SD1546 failedReplacement 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 tr14-09-04
Sharp4BSC 66AS05HDead - no line driveIC800 MC44002 jungle chip faulty14-09-04
Sharp4BSC 66AS05HDead with tickingLOPTr s/c due to dry joints scan coil plug14-09-04
Sharp4BSC 66AS05Hexcessive width with E-W errorL601 shorted turns (RCILP0104CEZZ)14-09-04
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