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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: 19
Matsui25M1DeadD354 off sec of tfmr dry joints & dry joints both regs14-09-04
Matsui25M1 Mk111Dead - no lights with psu tickingSt/by tfmr Pt no PTO146a from CHS14-09-04

Matsui25M1 Mk2St/by only - light off when chan button pressedNo B+ volts - R624 120k in start up o/c, also check R620 120k14-09-04
Matsui25M1 MkIIIn St/by - led flashes slowly when brought out of st/byChopper tr Q613 2SC4429 s/c - blew when using meter to check it for s/c! - also blew meter; Q612 2SC3807 s/c & R620/621 120k (original cause) - one of them o/c. R602 3R9 7w o/c & o/c mains fuse14-09-04
Matsui25M1 MkIISt/by onlyR620 / 624 120k o/c14-09-04
Matsui25M1 Sanyo EB2No memoryeeprom IC. ST24C02B (IC790) To initialise new chip, press and hold function button on tv, while pressing recall on remote handset. this gives message on screen Item-1 Set-0 Confirm Set number of all items is "0" by pressing the function button. If it is not "0" change to "0" by the level(+/-) button. (Changing the set number, automatically memorised.) Press the Recall buton to return to the normal TV mode. Then tune in and store channels as usual14-09-04
MitsubishiCT21M1BM CT25M1POPPING NOISE IN STBY WORKS OK WHEN ONQ951 Q952 OR DRYS ON CONNECTOR PB , R954 , R974 , R98514-09-04
MitsubishiCT25M1Juddering rasterC906 4µ7 25v chopper dr cap14-09-04
MitsubishiCT25M1STXBLANK/NO VIDEOQ702 JC50114-09-04
MitsubishiCT25M1TXDead - psu workingcrack in print coll of lop tr - also change C906 47µ, C905 470µ14-09-04
MitsubishiCT25M1TXField roll int & bent vertsC906 47µ 25v in psu14-09-04
MitsubishiCT25M1TXHORIZONTAL LINES ON SCREEN AND WHISTLINGC956 2200uF 16v14-09-04
MitsubishiCT25M1TXINT BLANK SCREEN+NO SOUNDIC2A2 Q2A2 AUDIO ONLY Q10414-09-04
MitsubishiCT25M1TXINT LOSS OF S/V , CHECK FOR VIDEO IP. AND OP. AT AVIF THERES AN OP. WITH SCART BUT NOT RF , SUSPECT Q2A2 JC501-QR PtNo 266P064010 IF NO PIC BUT SOUND OK CHANGE Q104 JC501. IF U14-09-04
MitsubishiCT25M1TXLOW CONTRAST AND FLYBACK LINESCheck for 2.9V at pin 7 IC251 if low Q704 u/s14-09-04
MitsubishiCT25M1TXMOTOR BOATING IN STANDBYREPLACE Q951 IN POWER SUPPLY14-09-04
MitsubishiCT25M1TXMotorboating type hum from spkrs in st/byQ951 leaky in PSU sec14-09-04
MitsubishiCT25M1TXNo pic - sound okLoss of 5v to txt dec. Z95 cct prot 630mA in psu o/c14-09-04
MitsubishiCT25M1TXWEAK VIDEO NO SYNCQ104 JC501 LEAKY-VIDEO AMP14-09-04
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