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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: 442
Decca
165
Dead - fuse blown.
Chopper Tx ( R4051 ) s/c , D812 ( BY396 ) s/c , R802 ( 3.3R 4W ) o/c.
14-09-04
Decca
165
Dead.
L802.
14-09-04
Decca
165
Field collapse
Drys IC301.
14-09-04
Decca
165
Frame cramp at bottom until set is warm.
IC TDA4503.
14-09-04
Decca
165
Int cutting out.
Drys on Q801.
14-09-04
Decca
165
Low gain
R102 ( 4K7 ) o/c bais to base Q101 swaf transistor
14-09-04
Decca
165
No signals
TDA4503 faulty in IF
14-09-04
Decca
165
No sound
TDA4503 chip
14-09-04
Decca
165
No sync - sound muted.
C122 ( 100nf ) leakey.
14-09-04
Decca
165
Noise through speaker when set is in standby.
Remove C826 , Fit 100nf Con in series with a 330R in C826 position
14-09-04
Decca
165
Peak white raster
TDA3565 I501
14-09-04
Decca
165
Position 1 keeps loosing memory
Fit ( 10uF ) 35V cap across 34 ( 5K6 )
14-09-04
Decca
165
Set stuck in StBy
Check QR06 ( BF391 ) for s/c R007 & RO11 both ( 3K9 ) if both o/c replace microcontroller
14-09-04
Decca
165
Signals low gain
R102 4k7 o/c
14-09-04
Decca
165
Sound muted - no sync.
C122 ( 100nf ) leakey.
14-09-04
Decca
165
St/by only
QR06 BF391 s/c, micro faulty (due to increased supply), R007 & R011 3k9 o/c
14-09-04
Decca
165
St/by only
Mains sw temp contacts only 0.5v (-15v) - R803/809 82k hi res
14-09-04
Decca
165
Stuck in standby.
R508 ( 12k ) o/c , R509 ( 12k ) o/c.
14-09-04
Decca
165
Tripping HT constant at 117v
No line drive as 11.5v supply missing pins 7 & 22 IC101 - Check R507 & R508 12k
14-09-04
Decca
165
Tripping.
D812 ( BY396 ) s/c.
14-09-04
Decca
170
Blowing Q403 S2000AF.
C421 o/c ( value depends on CRT size.
14-09-04
Decca
170
dead
chopper tr Q801 S2000AF s/c. Replace C807 100µ, C812 100µ. NOTE:- if run on reduced mains (120vac) set will trip even tho not faulty
14-09-04
Decca
170
Dead aft storm
Replace IR02 PCD8572 & I001 SAB3035
14-09-04
Decca
170
FAULTY AFTER ELECTRICAL STORM
REPLACE IR02 ( PCD8572 ) , AND I001 ( SAB3035 )
14-09-04
Decca
170
Green tint to picture.
R212 ( 47k ) high.
14-09-04
Decca
170
Int frame collapse - destroys TDA3651.
C306 ( 100uf 50v ) o/c.
14-09-04
Decca
170
INT SYNC BRIGHTNESS
DRYS ON TEXT PANEL OR POOR CONNECTIONS ON CHASSIS RIVETS + EARTHS
14-09-04
Decca
170
Intermittent sync/brill/sound/tuning etc
Soldered rivets connecting outer chassis to main pcb dry jointed
14-09-04
Decca
170
Loss of col & lines
Bad joints edge conn Txt panel
14-09-04
Decca
170
Low motorboating noise.
C711 ( 100mf 63v ) takes our R802 3.3ohm 4watt surge limiter L/H side of PSU.
14-09-04
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