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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
Make
Model
Problem
Solution
Date
Found: 7
Mitsubishi
CT25M5BT
E/W DISTORTION, LACK OF HEIGHT
REPLACE EEPROM IC
14-09-04
Mitsubishi
CT25M5BT
Sound int mutes
IC701 micro ST9291N6
14-09-04
Mitsubishi
CT25M5BT
Sound, no raster
Replace Q6E7 (JC501-R) on the tube base panel (part of the spot-killer circuit). It had a B-E leak and was failing to turn on Q6E8 (2SA950-Y) which in turn robbed the 12 volt feed to pin 2 of the CRT driver chip IC660 (TEA5101B).
14-09-04
Mitsubishi
CT25M5BT EE4
Field collapse
TEA2031A (IC551) & supply decoupler R516 0R82 safety resistor.
14-09-04
Mitsubishi
CT25M5BT EE4
Green LED only - prev int off - HT present
No line dr from IC201, no micro activity, replace EEPROM 24C08 & set up
14-09-04
Mitsubishi
EE4 CT25M5BT
Chopper Tr blows aft few days
Replace Q901 (chopper), R901 (4R7 10W), D909 (3V Zener) and change 220R resistor on the print side of the CRT PCB to 1K2 1/2 watt.
14-09-04
Mitsubishi
EE4 CT25M5BT
Dead - blows chopper tr s/c
mod, i.e. change the 220R res on print side of CRT base to 1K2 1/2watt,this apparantly prevents a surge from blowing the chopper at switch off
14-09-04
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