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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: 34
Amstrad
CT3
028
No signals or tuning volts
R124 15k o/c
14-09-04
ITT
CT3
306 Mono A
No sync.
C609 ( 100pf ) ceramic off pin 7 TDA2579
14-09-04
ITT
CT3
315 Pico S
Dark picture.
270k resistor in 1st anode supply.
14-09-04
ITT
CT3
325 Pico S
No colour after few hours.
T1410 in tuner control unit ( IFB351 )
14-09-04
ITT
CT3
326
AFTER 10 MINS CHANNEL DISPLAY FLASHES AND SET GOE
IC1405 5v REG INT OC ( MAY CAUSE TUNING INFO TO BE LOST )
14-09-04
ITT
CT3
326 Mono B
Dead - 115v at BU508D collector.
Try LOPTX see Tv mag.
14-09-04
ITT
CT3
326 Mono B
Startup - no startup - int.
C701 , C707 ( 2.2u f )
14-09-04
ITT
CT3
414
Line ringing
C724 18000pf u/s
14-09-04
ITT
CT3
425 80R
Flyback - white screen & flyback lines.
A1 control cracked , R544 ( 820k )
14-09-04
ITT
CT3
425 80R
Standby - going into standby.
IC1404 5 volt Reg.
14-09-04
ITT
CT3
425 80R 110°
Standby - intermittent going to standby.
Power Tx on main PCB by loptx.
14-09-04
ITT
CT3
435
St/by only
LOPTx - LOT192 Grandata u/s
14-09-04
ITT
CT3
436 Trimline
Brightness at maximum.
T1412 ( BC546 )
14-09-04
ITT
CT3
437 Comp B
No startup just a low single thud.
LOPTX D050/37 TFAT 3806
14-09-04
ITT
CT3
537
Int dead
IC405 5v reg
14-09-04
ITT
CT3
725/1 80R
Stuck in standby - with a noise from LTB.
D732 ( BY500-400 ) s/c can use a RGP30
14-09-04
ITT
CT3
835
NO PICTURE RASTER OK
T401 BC548 OC ( NO SANDCASTLE PULSES )
14-09-04
ITT
CT3
835 Comp 80
Going into standby after a few minutes.
C703 ( 10u f , 50v ) little blue one.
14-09-04
Mitsubishi
CT3
2BW1B
Dead apart from pri HT
Replace STRM6529 chopper chip, 0R22 res & check CCt prots in psu sec
14-09-04
Mitsubishi
CT3
2BW1B W1
Dead with no LEDs lit - quietley tripping
Check 2 current sensing res R907 and R915 in PSU. They are 0.22R and 0.27R in parallel for hi res
14-09-04
Mitsubishi
CT3
3C1STX
Dead
C905 & C910 leaky causing Q901 & D907 s/c - also check IC901
14-09-04
Mitsubishi
CT3
3C1STX
Dead with leds flashing int
C959 470µ 16v
14-09-04
Mitsubishi
CT3
3C1STX
Sync int
Vid I/p buffer Q7706 JC501R or possibly Q7707, C7718 22µ 50v
14-09-04
Mitsubishi
CT3
3C1STX AND S
INT LOSS OF SYNC
DRIES ON TEXT BOARD PLUGS / SOCKETS OR Q7706 Q7707 C7718
14-09-04
Mitsubishi
CT3
3C1STX AND S
INT SYNC
DRYS ON TEXT PCB CHECK PLUGS AND SOCKETS ALSO CHECK Q7706 , Q7707 , C7718 22uF 50v Q7706 MAIN SUSPECT
14-09-04
Mitsubishi
CT3
701TX
Dead
HT rect D916 s/c BY399 a good substitute
14-09-04
Mitsubishi
CT3
701TX
Dead & tripping
Dry joint on 47µ 200v cap in HT rail
14-09-04
Mitsubishi
CT3
703STX
Dead - LOPTr s/c
LOPTr 2SD1879 replaced & C908 10µ 100v, C909 47µ 50v
14-09-04
Mitsubishi
CT3
703STX
E/W & width
CHECK R5005 / R5006 FOR DRY JOINTS
14-09-04
Mitsubishi
CT3
703STX
No pic - ok thro' scart
Check for dry joints in IF can
14-09-04
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