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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: 140
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
Alba
CTV841
dead
chopper tr BU508AT s/c, R902 2R2 safety res o/c, C909, 911 47µ 50v HT now steady at 111v
14-09-04
Alba
CTV841
Dead with 4R7 surge limiter o/c
Check 4 x 4n7 ceramic caps in mains bridge rect for s/c
14-09-04
Alba
CTV841
Only tunes over lower bands
R646 10k 2w o/c (in front of loptx)
14-09-04
Alba
CTV841 Onwa
St/by only - relay chatters when sw held in
D401
14-09-04
Alba
CTV841 Onwa
No pic - appears bright when A1 advanced
R430 180k in beam lim o/c
14-09-04
Alba
CTV842
Dead - no line drive
Line dr tfmr o/c due to glue attack - managed to repair
14-09-04
Alba
CTV842
No colour
Cap 0µ47 connected to pin 12 of TA7698AP decoder/tb chip
14-09-04
Alba
CTV842
No tuning
R108 10k o/c
14-09-04
Alba
Onwa CTV701
No sound/pic just pattern on screen
Video reaching Txt pcb but not leaving it. 5v supply missing - check HT smoothing cap 100µ 160v
14-09-04
Alba
PTV10
Dead.
Mains transformer primary o/c. only use correct bri e.
14-09-04
Alba
PTV9
NO TV TUNING RADIO OK
R128 OC 6k8
14-09-04
Alba
Ssangyong ETC. C
DEAD ZD401 12v ZENER SC R414 12R 2W OC LOP TR SC
CHECK HT SHOULD BE 114v CHECK ALL POWER SUPPLY CAPACITORS , ZENERS AND SOLDERING
14-09-04
Alba
T14
Dead - mains fuse o/c
Q1 FET P5NA80F1 s/c due to R294 270k o/c (RS stock FET order code 313-2857))
14-09-04
Alba
VTV10
Dead
C480 10µ near line dr tr
14-09-04
Alba
VTV10
No vision , JUST BLUE SCREEN
R7024 1r VCR P.SUPPLY. NO HT TO TV IF AMP TRANS.
14-09-04
Alba
VTV19 Combi
No pic - sound ok
C480 10µ near line dr tr
14-09-04
Alba
/Bush
CTV100
Uncontollable vol that wont reduce
L101 o/c
14-09-04
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