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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: 49
Amstrad
3121N 11AK12
St/by only - psu o/ps present except 12 & 8v
IC301 (CTV352/V1.4) and IC302 (ST24C02AB1).
14-09-04
Amstrad
CTV3121
Dead with psu ticking
C5 100µ 400v mains smoother
14-09-04
Amstrad
CTV3121N
Blank raster only when A1 advanced
R22 0R22 in sec of psu o/c
14-09-04
Amstrad
CTV3121N
St/by only
R22 0R22 risen in value to 3R6
14-09-04
Amstrad
CTV3121N
St/by only
R22 0R22 safety res o/c
14-09-04
Amstrad
CTV3121NF 11AK12
No response from R/C although R/C is outputting a signal
Was still faulty handset - dry joints IC giving wrong output codes
14-09-04
Beko
11214T
Int no pic - sound ok
thyristor T701 ESM740 goes o/c intermittently ESM740 no longer available, use TR03-400T and add a 47 Ohm 0.5W resistor from gate to ground.
14-09-04
Beko
11214T
Int no pic - sound ok
T701 thy ESM740 goes o/c int - NLA -- use a TR03-400T & add 47R ?w resistor from gate to ground
14-09-04
Fidelity
3121
St/by only - pin 2 LM317 chip I3 only 2v (sw 12v turned on by micro)
Micro faulty - order under Amstrad part no 045101070201 (Mono model CTV322) & 045101070201 (stereo model CTV352)
14-09-04
Fidelity
CTV3121NF 11AK12
Faintly tripping
D22 s/c (5v supply tfrom chopper trfrmr) & chopper transformer faulty
14-09-04
Finlux
5121
service mode entering
1.switch on with mains switch. 2. press tv>prg>ext within 5 sec of switch on. 3.key in 04 [will then run through numbers on the display] comes back to 04 and you are ready to start.10, line freq 24 r gain; 25 g gain; 26 b gain; 27 r ref; 28 g ref; 29 b ref; 12 height; 13 v lin; 14 vs correction; 15 v shift; 34 v shift; 35 tuner agc; 38 ref osc; 39 y delay; 17 width; 21 h comp; 11 h posistion; 18 para; 19 corner correction; 20 trapez.
14-09-04
Hitachi
C2121T Daewoo
Squealing with no sound/pic
Burning smell coming from IC301 TDA8356 FOP chip which was faulty
14-09-04
ITT
CT2600 CVC1210
Dead - with ticking noise.
BU208A , T562 ( BD135 ) , R503 ( 100ohm ) if LOPTX hot change it.
14-09-04
ITT
CVC1210
Blank raster & may have fly back lines.
R536 ( 33k ) burnt up.Change it plus T900 ( BC238 ) decoder
14-09-04
ITT
CVC1210
Dead - power supply buzzing.
R744 o/c ( safety component ) check R503.
14-09-04
ITT
CVC1210
Int Start up
Replace C731 & C733 both ( 10uF ) C713 C703 C701 lift Cathode D712 Add 1.8ohm in series
14-09-04
ITT
CVC1215
Blank Raster & may have fly back lines
R536 ( 33k ) burnt up.Change it plus T900 ( BC238 ) decoder
14-09-04
ITT
CVC1215
Confetti interference
Focus pot
14-09-04
ITT
CVC1215
dead
Burn up on L503 - clean up & resolder
14-09-04
ITT
CVC1215
Dead
HT only 100v at LOP Tr & driver; BU208A faulty also dry joints IF can- (appeared to be the cause of demise of LOP Tr)
14-09-04
ITT
CVC1215
Dead - blows fuse at switch on.
C701 ( 10uf , 350v ) s/c
14-09-04
ITT
CVC1215
Dead - fuse gone.
BU508 checks s/c in cct 10uf C701.
14-09-04
ITT
CVC1215
Dead - power supply buzzing.
R744 o/c ( safety component ) check R503.
14-09-04
ITT
CVC1215
dead - smell of burning
1A fuse o/c; LOP Tr BU208A leaky; HT now correct but other supplies low. Sound OK; No EHT/focus volts - T562 BD135 leaky
14-09-04
ITT
CVC1215
Distortion across centre of picture.
Line transistor heatsink earth connection.
14-09-04
ITT
CVC1215
Int - startup.
C731 , 733 , 713 , 703 , 701 + add a1.8R in series +of D712
14-09-04
ITT
CVC1215
Int width with bowing
LOP Tr heatsink bad joints
14-09-04
ITT
CVC1215
Line collapse (faint)
C511 0.33µ burnt & o/c
14-09-04
ITT
CVC1215
Lines across centre of screen when cold
LOP Tr heatsink bad joints
14-09-04
ITT
CVC1215
No sound
Fusible res adj to R1075 o/c; C1075 2200µ 25v s/c
14-09-04
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