SONY TV Repair: Common Faults and Solutions.


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SONY Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYKV1913
No audio on ch 10-12No audio on channel 10/12 or very low sound. found channelind. lamp for channel 10/12 defective.
SONYKV1545R
Remote operation range too short, open ground "n" boardThis unit had poor shield ground on n board causing shortrange on remote when set was on.
SONYKV1221R
Picture distortion, replaced c524Picture pulled up 3 inches on bottom of the screen and upperright hand corner blanked. found c524 off pin 13 ic301 was installed withpolarity reversed.
SONYKP7220
Incorrect blue convergence, replaced d5320This unit had a blue convergence problem. the blue verticallines were wider than the red or green.
SONYKP7200
Incorrect tuning operationTv would scan but would not stop on stations.
SONYCFS45
Defective side platesPlastic handle side plates on this model brake. handle side plates may not be strong enough to carry weight of this model under allstress conditions.
SONYKV8000
Poor h syncSet displayed poor horizontal sync.
SONYKV1945R
Color distortion, replace ic301No blue, yellow picture. base voltage at q701 was 0 volts.output at pin 28 at ic301 0 volts, input to ic good.
SONYKV1913
No pictureLoss of vertical deflection.
SONYKV2643R
Shut down, removed l810This unit would shut down by itself. the picture wasexpanded in size (a lot of overscan). the hv was 3kv lower.
SONYKV2643R
Sound no mute during change, replaced q042Sound would not mute during channel change. checked pin #13of ic032 positive pulse was present during channel change, therefore,q042 was suspected.
SONYKV2643R
Clock display dims, replaced displayClock display dims when touched by hand. display flickers when someone walks by tv.
SONYKV2601
No color, replaced shorted cv301After about 2-3 minutes of playing time color disappeared.found cv301 actually physically shorted to 0Ω.
SONYKV2601
No uhf, replaced q203During programming unit would skip uhf band. 12v b+ was low(10.5v), q203 was bad.
SONYKP5000
Incorrect function for tuning, q2211 leakyDuring programming unit would not stop on active channels in one direction from low to high.
SONYKV2644R
No tuning lock, replaced c219Would not lock on to any channel in program. aft voltage pin#10, ic201 down to 0.4v.
SONYKV2643R
Channel drift, replaced ic2003Set would drift off channel during operation. found ic2003(display memory) apparently loading control ic and changing pwm voltage.
SONYKV2643R
Retrace lines, broken land on c boardServicer informed me of a problem where the picture would benormal and then get brighter and go into retrace and then back to normal.then it again would repeat itself.
SONYKV2643R
Dead, remove jw54 and othersNo operation above 100vac. h. voltage was at 23kv. servicerhad replaced flyback and ic501. voltage to shutdown circuit was 5.7v.removed l801, h. voltage went up to 26kv. -hq comments: we will publish updated info on this problem shortly. asfor now c
SONYKV1714
No videoNo video. just snow only. but if you adjust the tuningselector you can get ch. 7 and ch. 5 but if you go back to ch. 5 thesignal in ch. 7 will be erased. no -24v power supply.