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Sony Repair Tips




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Search: sony
Results: 20100
Make Model Symptom Problem Solution By
SONY KV2648R
High pitch noise The unit makes a high pitch sound like a flyback with loosecore. replacing pot transformer did help a little but still audible.wedging the transformer almost reduce noise but awkward solution.
SONY KV2647R
Tuning drift, resolder r053 Upon changing channels a good video will come on for a momentbut will drift off to barely viewable negative picture.
SONY KV2647R
No control of brightness, broken foil on crt board No control of brightness. picture would start at normallevel and slowly get dimmer with retrace lines, then flash to normalpicture level again. no g2 voltage on pin 12 of crt board.
SONY KV2647R
Picture distortion, replace c549, c550 and c554 Slight pie crusting and marginal horizontal sync.
SONY KV2645R
No remote operation, repaired crack on n board Unable to control operation with remote. found hairlinebreak on n board.
SONY KV2643R
Under scanned picture, r533 value changed, replaced Picture under scanned horizontally and vertically. foundresistor r533 changed value, should read 1.2Ω, read 14Ω.
SONY KV2602
Vertical foldover, replaced ic502 Vertical foldover at bottom. all voltages around ic501 andic502 checked good except pin 5 of ic502 which was very low, waveformswere distorted.
SONY KV2145R
No video/sound, replaced prescaler No video - no sound.
SONY KV2145R
Dark picture, replaced brt control Unit loses brightness (goes black) intermittently. voltageok, tp49 goes low whenever problem occurred. found brightness controlshorting to its case.
SONY KV1946R
Dead, fbt Flyback arc over.
SONY KV1946R
Sound noise, replace t206 This unit had a background hiss in the sound. adjusting t206 did no good. found t206 had the incorrect transformer installed.p/n 1-403-360-13 was marked on the outside.
SONY KV1913
Shut down At turn on, set would shut down after a few minutes to a fewhours.
SONY KV1913
No sound Sound goes on and off, cooling c226 would confirm problem.
SONY KV1746R
Shut down, installed c547 as per t/n This unit would intermittently go into hv shutdown.
SONY KV2644R
Incorrect tuning, replaced ic2002 Set 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.
SONY KV2643R
No operation, replaced c539, c805 and r812 Set 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.
SONY KV1945RS
Poor remote operation, replaced ic1, cx-786 in commander Poor sensitivity with remote approx. 6 feet.
SONY KV1945RS
Shut down, selected r563 This 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
SONY KV1945R
No color, replaced ic501 No color. found no pulse at pin 20 of ic301. traced theproblem to pin 22 of ic501 where i found no sync out.
SONY KV1217
Dead, replaced q602 No 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.