Schematics 4 Free
Service manuals, schematics, documentation, programs, electronics, hobby ....
◦
register
◦
send pass
S
earch
B
rowse
U
pload
W
anted
D
atasheets
C
hassis2model
R
epair tips
F
ulltext search
C
ables & Connectors
R
epair 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
Make
Model
Problem
Solution
Date
Found: 10
Mitsubishi
CT21M5B
CT25M5
B
Tuning drift mainly at top end of band
Add ( 180K ) & Diode ( IN4148 ) in series cathode of diode to 5V pin 6 Tuner & res to Tuning Voltage line pin 2
14-09-04
Mitsubishi
CT25M5
B
Failure of Q552
Order & fit AVM5KIT
14-09-04
Mitsubishi
CT25M5
B
Under very poor signal conditions "Herringbone" pa
Fit specially screened RF lead between VCR & TV PtNo H24P001010
14-09-04
Mitsubishi
CT25M5
BT
E/W DISTORTION, LACK OF HEIGHT
REPLACE EEPROM IC
14-09-04
Mitsubishi
CT25M5
BT
Sound int mutes
IC701 micro ST9291N6
14-09-04
Mitsubishi
CT25M5
BT
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
CT25M5
BT EE4
Field collapse
TEA2031A (IC551) & supply decoupler R516 0R82 safety resistor.
14-09-04
Mitsubishi
CT25M5
BT 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
CT25M5
BT
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
CT25M5
BT
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
page:
1
FB
-
Links
-
Info / Contacts
-
Forum
-
Last SM download : Denon AVR487, 587, 687, 1507, 1707
script execution: 0.12 s