mitsubishi Repair Tips




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MakeModel Ch.SymptomProblem SolutionSolutionBy:
Mitsubishi CT29B2STX
Line output transistor s/c, repeated failureReplace the four caps in the power supply C905 470uF, 35V, C906 470uF, 50V, C909 2.2uF, 50V and C920 100uF, 25V also note transistor varies with different size c.r.t.
Mitsubishi BDS29S 11AK19 PRO
Picture is black with faint green retrace lines, sound etc. okChanged TDA6108JF on CRT board, and nearby 10uF electrolytic which looked damaged. Fixed fault. A resistor next to the capacitor had been changed before but tested okay this time
Mitsubishi CT25M2TX
Frame collapse, destruction of AN5521 frame chip at switch onReplace the AN5521 then replace the 47uF, 35v electrolytic in the power supply. Also check the 330uF, 35v capacitor next to the frame chip for leakage
Mitsubishi CT29B2STX
Blank raster with sound / field collapseThe field output chip IC451 TDA8178S was faulty, as this original Mitubishi part was no longer available a kit had to be fitted no.H27PO14010 for this model, this uses a different chip - type STV9379
Mitsubishi CT2227BM
Intermittent no sound or pictureDesolder, then resolder Line Driver Transformer connections
Mitsubishi BD28WS 11AK19
At switch on front l.e.d turns green, blinks 3 times then set returns to standby. All h.t voltages rise, then fall away as set goes into standbyDry joints IC807
Mitsubishi CT29B2STX
Severe NS bowingCheck for leakage of the small electrolytic capacitors on the vertical correction pcb at the right of the main pcb, check C4014 in particular and if found to be faulty also check transistor Q4009 2SA950 which may also have been damaged
Mitsubishi BD28S 11AK19
Narrow E/W PicC630 o/c
Mitsubishi CS40503
Sometimes will not power up, missing 15 volt standbyReplaced D982 and C982, both leaky
Mitsubishi CT29B2STX
Various faults, dead, int. dead, poor frame, poor E-WChange all electrolytic capacitors in the primary. Check all large electrolytics in the secondary Ie bigger that 470uF, check all capacitors around IC950 error amp.. Most capacitors you will find are leaking electrolyte. Might be a long job!!!
MITSUBISHITC 1498
Vertical FechadoVerificar C461 C463
MITSUBISHITC 2018
liga e em seguida desligaD553
MitsubishiVarious
Int RGB variations/fback linesDry joints crt base
MitsubishiM5 srs
Tuning drift . Fit previous mod if not done alreadChange R120 220k to 100k , Change R121 180k to 82k , Change R126 100k to 47k remove R736 22k and fit an 8k2 & 15k 1/6w R-Met
MitsubishiM5 and AV1 srs
TUNING DRIFT OR INCOECT AFC OPERATIONFIT 180k + IN4148 IN SERIES FROM TUNER PINS 2 - 6 ( PIN 2 -180k->l- PIN 6 )
MitsubishiM5 and AV1 srs
RGB OUTPUT SC ( IC660 TEA5101B )CHECK FOR 12v ON WIRE LINK TO PIN 2. IF MISSING OR LOW PICTURE WILL BE AWFUL AND A1 WILL NOT SET COECTLY. Q6E8 LEAKY. REPLA
MitsubishiM5 & AV1 srs ( 2
POOR PICTURE .REMOVE Q6E2 , 6E3 , 6E4 , 6E5 . DECREASE RED DRIVE BY '5' POINTS , INCREASE BLUE BY '3' STEPS . THIS HAS BEEN DONE ON LATER S
MitsubishiM5 & AV1 srs ( 2
POOR PICTURE .CHANGE R521 FROM 82k TO 56k AND FIT ZENER DIODE KIT , Pt No 264P45090
MitsubishiM5 & AV1 srs
WHEN SWITCHED ON LED COMES ON GREEN , HT & LT PRESCHANGE C955 TO 3300uF 35v ( Pt No 181P353000 ) EEPROM MAY NEED RE-SETTING .
MitsubishiM srs AV1 srs
RF PATTERNING ( SIMILAR TO VIDEOCRYPT )FIT RF LEAD Pt No H24P001010