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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

MakeModelProblemSolutionDate
Found: 29
MitsubishiCT21AV1B EE3Dead - psu faultQ952 s/c D957 s/c Z953 o/c - mod kit 8VREG-KIT available if Q952 u/s14-09-04
MitsubishiCT21AV1B EE3Dead with green LED litPSU running but no line drive - mod = C702 from 1000mfd to 10mfd 25v, check C955 is 3300mfd 16v. Replace R702, 213, 214 with 1k 1/4w14-09-04

MitsubishiCT25AV1 EE3Dead - LOPTr leakyTEA2031A E/W corr chip s/c14-09-04
MitsubishiCT25AV1 EE3Dead - no line driveQ501 JC501-R faulty - 2SC1815 used as replacement14-09-04
MitsubishiCT25AV1BD EE3Blank raster with no sound or osdNo 8v - fit kit 8vREG-KIT from SEME14-09-04
MitsubishiCT25AV1BD EE3Dead - Green LED litchange C702 to 10uf & C955 to 3300uf also change R702 R213 & R214 from 220R to 1k & reset eeprom 14-09-04
MitsubishiCT25AV1BD EE3Dead - LOPTr s/cTEA2031A E/W chip IC551 faulty, R510 100R 2w overheating due to L501 6800uH shorted turns14-09-04
MitsubishiCT25AV1BDS EE3Int blows LOPTr at sw on from cold & lack of height/int contrast from coldC956 6.3V 470uF in 5V supply.14-09-04
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
MitsubishiCT25AVBDS EE3Int sw on/ off - G LED lights but no pic/sound (no line drive)C956 470uF 6.3v in secondary power supply circuit, close to IC95114-09-04
MitsubishiEE3Bank raster/no sound - OSD okZ953 1.6A cct prot. Has been uprated to 3.15A in sets incorporating sat Rx14-09-04
MitsubishiEE3Crushed whitesQ952 8v reg dry joints14-09-04
MitsubishiEE3DeadAVN5-KIT is available when Q552 has gone s/c - includes R713 1k, R726 5k6, Q552 2SD1556, Q901 S2000N, R508 3k9 5w, R991 4R7 10w, D909 RD3.0FB2 zener, an additional cap C720 22pf14-09-04
MitsubishiEE3DeadCct prot o/c - uprated to 3.15A from 2A also could be start up res R915 15R 2W, R922, R921 & R902 22k 2w 14-09-04
MitsubishiEE3Dead - LOP tr S2055N leaky then no line drQ551 fully conducting, Q501 JC501-R u/s14-09-04
MitsubishiEE3Dead - Q552 s/c due to high hTC914 47µ 35v o/c14-09-04
MitsubishiEE3Dead apart from flashing red/green LEDsC955 1000µ 16v14-09-04
MitsubishiEE3Dead- initially long time to come onC914 47µ 35v, C955 1000µ 16v14-09-04
MitsubishiEE3Dead; 2A fuse blown violently & chopper Q901 s/cReplace Q901 S2000N, IC901 TEA2261, Opto coupler PC951 TCDT1124G. Check D909 zener RD3.0FB2 & R908 0R33 2w & R909 0R22 2w14-09-04

MitsubishiEE3Green LED lit - no other activityHT secondary supplies ok- no line drive. IC702 EEPROM may need reprog14-09-04
MitsubishiEE3grey scale variesCRT bias request bit could not be set to 00 with G2 control - not IC201 dec/tbase gen chip.Cured by replacing TEA5101 RGB o/p chip & diodes D655/6/7 1N4148 on crt base14-09-04
MitsubishiEE3Lock up & memory problemsReplace C955, C702 & R3D68 also change value of R702, R213 & R214 to 1k ?w14-09-04
MitsubishiEE3long time to come onC955 2200µ for 11.5v supply14-09-04
MitsubishiEE3Low contrast, smeary, f back linesR686 on crt base (1k8)14-09-04
MitsubishiEE3 CT25AV1BDSHerringbone pattern, flashing lines etc with no pic for 5 minutes. Picture then slowly appearsC956 470uF 6.3V 14-09-04
MitsubishiEE3WService mode accessPress MENU, 2, 3, 5, 7 to access service mode, then press * (star key). Use 2 & 8 to navigate up and down the options, 4 & 6 to alter values. Press 0 (zero) to memorise new value & the info turns red to denote "saved". Finally go to standby to exit menu.14-09-04
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