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Repair tips

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

MakeModelProblemSolutionDate
Found: 206
FidelityZX4000Int loss of picture - sound mutes.C31 ( 2.7nf )14-09-04
FidelityZX4000Int relay trips releasing mains switch.C87 ( 100u f 250v )14-09-04

FidelityZX4000int tuning/no sigs esp low freqsTuning volts wont fall below 5.4v; R157 2M2 o/c14-09-04
FidelityZX4000Intermittent picture.DJ on brightness control.14-09-04
FidelityZX4000Lack of height.PR17 ( 220R ) high.14-09-04
FidelityZX4000Lack of width.C87 ( 100u f 250v )14-09-04
FidelityZX4000Memory - will not store channels.R514 should be 2.7k , R315-9 should be 1.8k see mag.14-09-04
FidelityZX4000No colourIC3 ( TDA3330 )14-09-04
FidelityZX4000No colour.Tuner!14-09-04
FidelityZX4000No contrast.R113 ( 100k ) o/c , check R111 ( 100k ) &R106 ( 10k ) , cct shows 1 R106 ( 110k )14-09-04
FidelityZX4000No frame.IC TDA3651.14-09-04
FidelityZX4000No picture - no A1 supply.C201 s/c.14-09-04
FidelityZX4000No visible raster - EHT & heaters Ok A1 at 12C201 ( 10nf 2Kv ) leaky on CRT base.14-09-04
FidelityZX4000Not storing stations.Store button o/c may be int.14-09-04
FidelityZX4000Peak white.IC3 faulty.14-09-04
FidelityZX4000Picture break up with corrugated verticals.C87 ( 100u f 250v )14-09-04
FidelityZX4000Picture rolling.Slightly adjust L4 ( video detector coil )14-09-04
FidelityZX4000PICTURE TOO BRIGHT + FLYBACK LINES ON SCREENTRY R57 10R OR C100 4u7 350v14-09-04
FidelityZX4000Shutdown - no sound or picture after 10 minsC31 ( 2.7nf ) connected bt pin 23 of IC2 & chassis.14-09-04
FidelityZX4000Sound intermittent.DJ on volume control.14-09-04
FidelityZX4000Sound mutes - int no picture.C31 ( 2.7nf )14-09-04
FidelityZX4000St/by onlyBUT56A chopper tr s/c, 1.6A fuse o/c - dry joints C28 yellow cap by lopt14-09-04

FidelityZX4000Stuck on channel 1.C221 ( 10nf )14-09-04
FidelityZX4000SWITCHES OFF INT12v REG INT OC REPLACE LM317T14-09-04
FidelityZX4000Tuner - drift.IC201 ( M490B1 or M490BB1 )14-09-04
FidelityZX4000Tuner drift.IC1 ( SL1431 ) , ZD2 ( BZYC5V1 ) adj AFC coil after fitting.14-09-04
FidelityZX4000Tuner drift.Slightly adjust L4 ( video detector coil )14-09-04
FidelityZX4000Tuning - low gain.SWARF IF filter , Tuner.14-09-04
FidelityZX4000Tuning - no tuning.Crack in print between TAA550 & pin 11 of SL470.14-09-04
FidelityZX4000Tuning - will not store.IC TAA550 33v regulator goes leaky.14-09-04
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