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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: 206
Fidelity
ZX4000
Int loss of picture - sound mutes.
C31 ( 2.7nf )
14-09-04
Fidelity
ZX4000
Int relay trips releasing mains switch.
C87 ( 100u f 250v )
14-09-04
Fidelity
ZX4000
int tuning/no sigs esp low freqs
Tuning volts wont fall below 5.4v; R157 2M2 o/c
14-09-04
Fidelity
ZX4000
Intermittent picture.
DJ on brightness control.
14-09-04
Fidelity
ZX4000
Lack of height.
PR17 ( 220R ) high.
14-09-04
Fidelity
ZX4000
Lack of width.
C87 ( 100u f 250v )
14-09-04
Fidelity
ZX4000
Memory - will not store channels.
R514 should be 2.7k , R315-9 should be 1.8k see mag.
14-09-04
Fidelity
ZX4000
No colour
IC3 ( TDA3330 )
14-09-04
Fidelity
ZX4000
No colour.
Tuner!
14-09-04
Fidelity
ZX4000
No contrast.
R113 ( 100k ) o/c , check R111 ( 100k ) &R106 ( 10k ) , cct shows 1 R106 ( 110k )
14-09-04
Fidelity
ZX4000
No frame.
IC TDA3651.
14-09-04
Fidelity
ZX4000
No picture - no A1 supply.
C201 s/c.
14-09-04
Fidelity
ZX4000
No visible raster - EHT & heaters Ok A1 at 12
C201 ( 10nf 2Kv ) leaky on CRT base.
14-09-04
Fidelity
ZX4000
Not storing stations.
Store button o/c may be int.
14-09-04
Fidelity
ZX4000
Peak white.
IC3 faulty.
14-09-04
Fidelity
ZX4000
Picture break up with corrugated verticals.
C87 ( 100u f 250v )
14-09-04
Fidelity
ZX4000
Picture rolling.
Slightly adjust L4 ( video detector coil )
14-09-04
Fidelity
ZX4000
PICTURE TOO BRIGHT + FLYBACK LINES ON SCREEN
TRY R57 10R OR C100 4u7 350v
14-09-04
Fidelity
ZX4000
Shutdown - no sound or picture after 10 mins
C31 ( 2.7nf ) connected bt pin 23 of IC2 & chassis.
14-09-04
Fidelity
ZX4000
Sound intermittent.
DJ on volume control.
14-09-04
Fidelity
ZX4000
Sound mutes - int no picture.
C31 ( 2.7nf )
14-09-04
Fidelity
ZX4000
St/by only
BUT56A chopper tr s/c, 1.6A fuse o/c - dry joints C28 yellow cap by lopt
14-09-04
Fidelity
ZX4000
Stuck on channel 1.
C221 ( 10nf )
14-09-04
Fidelity
ZX4000
SWITCHES OFF INT
12v REG INT OC REPLACE LM317T
14-09-04
Fidelity
ZX4000
Tuner - drift.
IC201 ( M490B1 or M490BB1 )
14-09-04
Fidelity
ZX4000
Tuner drift.
IC1 ( SL1431 ) , ZD2 ( BZYC5V1 ) adj AFC coil after fitting.
14-09-04
Fidelity
ZX4000
Tuner drift.
Slightly adjust L4 ( video detector coil )
14-09-04
Fidelity
ZX4000
Tuning - low gain.
SWARF IF filter , Tuner.
14-09-04
Fidelity
ZX4000
Tuning - no tuning.
Crack in print between TAA550 & pin 11 of SL470.
14-09-04
Fidelity
ZX4000
Tuning - will not store.
IC TAA550 33v regulator goes leaky.
14-09-04
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