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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: 7
Panasonic
Alpha 1W
Chan ind lit with whistle & nothing else
No line drive traced to IC101 TDA4505-M1 jungle chip
14-09-04
Panasonic
Alpha 1W
Cogging on verts
C808 10µ50v
14-09-04
Panasonic
Alpha 1W
Dead
No 12v supply to line osc pin 7 IC101 from 12v reg IC851 - D855 o/c
14-09-04
Panasonic
Alpha 1W
Field collapse
TDA4505M faulty - use TDA4505E & change R112 from 1M5 to 470k & R113 from 22k to 470k
14-09-04
Panasonic
Alpha 1W
Loud wine but no picture.
R851 ( 1.2R fusible ) go's high.
14-09-04
Panasonic
Alpha 1W
NO COLOUR
TDA3562A
14-09-04
Panasonic
Alpha 1W
No sound or picture - squealing from PSU.
D854 s/c , if still no good suspect LOPTX.
14-09-04
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