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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: 19
Mitsubishi
CT21AV1
CT25AV1
Failure of Q552
Order & fit AVM5KIT
14-09-04
Mitsubishi
CT21AV1
CT25AV1
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
CT25AV1
No pic or OSG - sound ok
12v Sw Tr on CRT Base o/c b/e (feeds 12v to TDA 5105 RGB drive I.C. PIN 2.)
14-09-04
Mitsubishi
CT25AV1
EE3
Dead - LOPTr leaky
TEA2031A E/W corr chip s/c
14-09-04
Mitsubishi
CT25AV1
EE3
Dead - no line drive
Q501 JC501-R faulty - 2SC1815 used as replacement
14-09-04
Mitsubishi
CT25AV1
B
INT NO SOUND
REPLACE REGULATOR MOD KIT AND IC202
14-09-04
Mitsubishi
CT25AV1
B
Sound int
IC202 TEA6415C faulty (draws excess current) & replace 8v reg Pt no MITS8VREGKIT
14-09-04
Mitsubishi
CT25AV1
BD
Field collapse
D561 s/c on E/W IC & R516 o/c
14-09-04
Mitsubishi
CT25AV1
BD EE3
Blank raster with no sound or osd
No 8v - fit kit 8vREG-KIT from SEME
14-09-04
Mitsubishi
CT25AV1
BD EE3
Dead - Green LED lit
change C702 to 10uf & C955 to 3300uf also change R702 R213 & R214 from 220R to 1k & reset eeprom
14-09-04
Mitsubishi
CT25AV1
BD EE3
Dead - LOPTr s/c
TEA2031A E/W chip IC551 faulty, R510 100R 2w overheating due to L501 6800uH shorted turns
14-09-04
Mitsubishi
CT25AV1
BDS
Service mode & EEPROM settings
Switch on with mains switch and press service microswitch, select button 9 on the remote within 5secs. You will now be in the service mode. Use the buttons on the remote control for the following adjustments: * to toggle between adjustment displays 1 cancel; 2 increase adjustment code; 4 decrease data value; 6 increase data value; 8 decrease adjustment code; 9 adjustment mode on; 0 write to the eeprom( press this to write your changes to the eeprom) Here are the options- TUN 0; SAT 1; AUD 10; ATS 1; STD 1; SYS 1; AV1 2; EEX -; SPK 1; EEP -; ABG 02; A1 02;AL 00; ADK 15; MNP 70; TXT -; FFT 1; VOL 74;HYP 1; SCP 20; FMP 23. not all options appear to be available to some models. Adjustments in the VCJ mode will be in default mode and it will be necessary to observe display in order to set-up width height ew etc.
14-09-04
Mitsubishi
CT25AV1
BDS EE3
Int blows LOPTr at sw on from cold & lack of height/int contrast from cold
C956 6.3V 470uF in 5V supply.
14-09-04
Mitsubishi
CT25AV1
BS
No sound - pic ok
reset eeprom settings from infomation provided by Darren Hoskin & Graham Cooke
14-09-04
Mitsubishi
CT25AV1
BS EE3
Blank raster with sound
Vid signal enters pin 42 IC201 but no o/ps - eventually found due to no 12v crt base - R514 0R82 1/2w safety res o/c
14-09-04
Mitsubishi
CT25AV1
BS EE3
Dead - off with burning smell - green LED perm lit
CSD3 470n 400v o/c - looks stressed cause of trouble. Also R510 100R 1/2w o/c - also replaced TEA2031A
14-09-04
Mitsubishi
CT25AV1
BS EE3
Field collapse
TDA8171 & R516 0R82 1/2w o/c
14-09-04
Mitsubishi
CT25AV1
BS EE3
No E/W or width control (after CSD3 470n replaced)
L504 burnt & shorted windings - rewound with 493 turns - also check TDA2013A E/W chip
14-09-04
Mitsubishi
EE3
CT25AV1
BDS
Herringbone pattern, flashing lines etc with no pic for 5 minutes. Picture then slowly appears
C956 470uF 6.3V
14-09-04
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