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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: 8
Alba
CTV840
dead
chopper tr BU508AT s/c, R902 2R2 safety res o/c, C909, 910 47µ 50v HT now steady at 111v
14-09-04
Alba
CTV840
Field collapse
C404 22nf int s/c req replacement of field chip LA8730 & supply diode
14-09-04
Alba
CTV840
No tuning
R125 47R o/c, C127 470µ 16v s/c
14-09-04
Alba
CTV840
No tuning/store or analogue adjust apart from Vol
-30v supply low pin 9 IC601 - C919 330µ 50v esr >100, also check ZD601 30v zener
14-09-04
Alba
CTV840
Onwa
Black vert bars with background pic
C420 22µ 160v o/c
14-09-04
Alba
CTV840
Onwa
No tuning although the set displayed tuning drive
R125 ( 47R ) was opencircuit because C127 ( 470uF 16V ) was short circuit .These components form a filter in the 9.25V supply
14-09-04
Triumph
CTV840
2
Herringbone patterning - sound Ok.
C807 ( 120u f ) in PSU.
14-09-04
Triumph
CTV840
2
Txt lines at top of screen
C312 10µ 35v
14-09-04
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