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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: 64
Aiwa
VXT1000
Mk2
Dead
Ht ok at 120v - ICP1 o/c
14-09-04
Aiwa
VXT1000
Mk2
Dead
STK7348 s/c pins 3 & 7, also R103 1R5 3W o/c, R104 27R 3w, R105 1k 1/2w & C90 1µ 50v
14-09-04
Aiwa
VXT1000
Mk2
Dead - no line drive
D7 9v1 zener & C105 330µ 16v both s/c
14-09-04
Aiwa
VXT1000
Mk2
Failure of IC STK7348 in tv psu
Replace:R102. 33ohmlW Part No S5 34A 330 000 R104 27ohm 3W Part No Sl 330 703 000(6.25UKP) RlOl 33ohm7W Part No Sl 330 862 000(8.37UKP) Also please check and if necessary replace:R103(3.76UKP) R105 Replace as required. R109(4.00UKP) NOTE: Do not replace IC on its own.<<
14-09-04
Aiwa
VXT1000
Mk2
Dead
STK7348 psu chip & C88 0.0033pf 2kv
14-09-04
Aiwa
VXT1000
Mk2
Dead TV sect - vcr sect ok
C88 0.0033µ 1kv burnt; STK7348 psu chip s/c; R109 3R9 7w o/c
14-09-04
Aiwa
VXT1000
Mk2
No pic sound ok
C88 3n3 1kv burnt
14-09-04
BPL
9002ECR
Mk2
Dead - caps in psu sec had blown up
Hi HT - change Q511 2SA1015 , R552 91k, R555 47k & opto coupler
14-09-04
Ferguson
TX9
Mk2
Sound no Picture - blank rast/fly back A 1 up
R147 ( 4.7k ) , W57 , WT57 ( BC337 )
14-09-04
GEC
C2233H 20AX
Mk2
Bright raster.
R281 ( 82k ) o/c.
14-09-04
GEC
C2233H 20AX
Mk2
Dead.
D503 s/c , R503 o/c.
14-09-04
GEC
C2233H 20AX
Mk2
Raster - flyback lines & excessive brightness
R281 ( 82k ) o/c.
14-09-04
GEC
NP84
Mk2
Int no colour.
C527.
14-09-04
Hitachi
CPT2158 NP85CQ
Mk2
Poor pic - dark & streaky
ZD801 3v3 zener on crt base leaky
14-09-04
Hitachi
G7P
Mk2
Blank white raster.
C711 dry jointed by LOPTX.
14-09-04
Hitachi
G7P
Mk2
buzz on sound - flat pic
vid det coil L202
14-09-04
Hitachi
G7P
Mk2
Dead
TDA4601 chopper chip - also replace C914/5/6/7
14-09-04
Hitachi
G7P
Mk2
Dead - HT high
X ray prot operating due to R716 51k res dry jointed
14-09-04
Hitachi
G7P
Mk2
Dead R901 3R9 7w surge lim res o/c
C919 4n71kv leaky & check C928 2n2 2kv
14-09-04
Hitachi
G7P
Mk2
Dead with only 33v HT at LOPtr
C909 150µ 400v mains smoothing cap o/c
14-09-04
Hitachi
G7P
Mk2
Field bounce or st/by only
IC703 MC7809 9v reg dry jointed or faulty
14-09-04
Hitachi
G7P
Mk2
FOP chip has short life
Check HT is not too high - if so U know what to do!
14-09-04
Hitachi
G7P
Mk2
Goes off aft half an hour
Dry joints C711 47µ 200v
14-09-04
Hitachi
G7P
Mk2
Green raster with flyback lines
R808 22k ?w o/c
14-09-04
Hitachi
G7P
Mk2
grey raster with fb lines
C711 47µ 200v bulging & faulty by LOPTx
14-09-04
Hitachi
G7P
Mk2
int pic size/ht
C906 4µ7 250v
14-09-04
Hitachi
G7P
Mk2
Mass of lines at centre of screen
Comes/goes with board flex - C702 dry joints - near IC701 FOP chip
14-09-04
Hitachi
G7P
Mk2
NO GO
R920 100k OC
14-09-04
Hitachi
G7P
Mk2
no sound or pic - ht ok
field collapse. No 9v to field chip as MC7809 IC703 o/c
14-09-04
Hitachi
G7P
Mk2
No start up
C911 82pf across pins 2 & 3 TDA4601 psu chip
14-09-04
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