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
SONYKV1746R
Shut down, installed c547 as per t/nThis unit would intermittently go into hv shutdown.
SONYKV2644R
Incorrect tuning, replaced ic2002Set would stay in address position a at all times. i foundwhen i turned channel set switch on and programmed set, it would work ok.but if i shut the set off, and turned it back on again, it would come onin position a and could not be addressed again.
SONYKV2643R
No operation, replaced c539, c805 and r812Set inoperative. found r812 open and c805 leaky. replacedthem and picture displayed vertical bar (approx. 5 inches) on left side,r812 was running warm. found c539 open.
SONYKV1945RS
Poor remote operation, replaced ic1, cx-786 in commanderPoor sensitivity with remote approx. 6 feet.
SONYKV1945RS
Shut down, selected r563This unit intermittently shuts off, sometimes twice a week,sometimes once. voltage on pin 12 was 5.3v making it too near thethreshold level of 5.6v, changing r563 to satisfy the procedure in manualresults in a 15k resistor which was half of the original
SONYKV1945R
No color, replaced ic501No color. found no pulse at pin 20 of ic301. traced theproblem to pin 22 of ic501 where i found no sync out.
SONYKV1217
Dead, replaced q602No sound, no picture, channel indicator stays in one position,tuning and band indicators are dim. found regulator transistor q602leaky, and both audio output transistors q205 and q206 shorted also r232open.
SONYKV2647R
Snow picture, resolder r053Set displayed snow on all channels. i found r053 on mf boardimproperly soldered.
SONYKV2647R
Set would not turn on/off by remote, ic-101Set would not turn on/off.
SONYKV2645RS
Color distortion, replaced r751Bleeding color (red). found r751/470kΩ resistor changedvalue.
SONYKV2643R
Raster pulsating, replaced r609Picture and raster pulsating. the 135v line exhibited samepulsation.
SONYKV2145R
No picture, fbtSet kept shorting out the horizontal output transistor.
SONYKV2101
Picture distortionSet had light vertical bands in picture. they started on the left and became less bright as you moved to the right. horizontal output waveform was affected as well.
SONYKV1946R
Picture distortion, replaced c524Set would go into vertical bounce after warm-up.
SONYKV1945RS
Snow picture, replaced prescalerSnow on all channels. no output from prescaler.
SONYKV1945R
Sound and picture distortion, replaced ic005Volume and picture levels go down. one could adjust volumeand picture levels in up mode, but a few seconds later, the levels wouldgo down to minimum.
SONYKV1945R
Intermittent on/off, leaky d026Intermittent on/off. last channel memory is off. when turnmaster switch on, tv comes on intermittently. ic006 pin 11 is low (2.4v)should be 5.1v. d026 zener didoe was leaky.
SONYKV1913
Vcr pb picture distortionViewing tv normally, off channel no problem set looks good,however, when vcr played through set, top of picture would curve to rightlike flag waving. vhs system is what customer has and complained on.however, distributor put betamax through unit and sam
SONYKV1221R
No on/off function, replaced rl001Unit would not shut down manually or on remote. whenattempting to turn off set with manual switch or remote, the sound wouldmute, but the raster would remain. tapped on the case of relay rl001.power immediately went off. found rl001 was hanging up due
SONYKV1216
Picture pulling horizontally, replaced ic201Picture pulling horizontally on some channels. problemtraced to output of sync separator, q301, where horizontal sync amplitudewas lower than normal. observing composite video at pin 14 of ic201showed horizontal sync pulse to be just slightly higher th