Dicas Reparação




Modelo - Chassis


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Resultados 79950
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV2645R
DEAD, REPLACED C019 Set would not turn on. Found C019 shorted.
SonyKV2145R
NO SOUND, BROKEN LEAD ON OUTPUT TRANSFORMER No sound. Inspection revealed broken wire from secondaryof sound output transformer to solder lug, right at the lug.
SonyKV2145R
NO VHF, BT981 PRESCALER No VHF low and high band, very intermittent.
SonyKV1945R
INCORRECT TUNING FUNCTION, REPLACED IC004 Only numbers 1 or 2 can be addressed on TV by hand unit.Operation on channel selection manually is OK. I found Pin 28 of IC004has 10VDC on it at all times. Waveforms on Pin 37 were normal but theamplitude of waveforms at Pin 14 were very low with all n
SonyKV1914
NO PICTURE Unit would blank out approx. after 1/2 hour, sound stillnormal. By turning set off for a while and turning it back on, the unitwould again work for a shorter period of time and blank out. Found thatby freezing vertical output IC unit would function nor
SonyKV1546R
SET WOULD NOT TURN OFF, REPLACED RL001 Set would not turn off when power switch pressed. Brightnesslevel would drop but would not turn completely off - intermittent problem.
SonyKV1545RS
SHORT RANGE REMOTE OPERATION, REPLACED D1 Customer complained of short range, approx. 12 feet.
SonyKV1543R
NO TUNING MEMORY, REPLACED C047 Customer pulled AC plug from wall outlet during electricalstorms, had to reprogram tuner (lost its memory). C047 a 100pF capacitoron the WRITE/ERASE line (Pin 6 of IC034, CX761) defective allowing pinto remain high after AC disconnection.
SonyKV1221R
SNOW PICTURE, REPLACED C038 Every 2 weeks picture would go to snow and remain in onechannel position. Tuning functions totally inoperative and manual channelselection would not work. Volume up and down functions OK. Clock osc.waveform wrong also voltage at Q034 base 0V should be
SonyKV2645R
AUDIO HISS NOISE, REPLACED IC401 Left channel of matrixed side had distortion plus somebackground hiss, right side sounded good. Disrotion showed up mainlyon music, and background noise only showed up when no voice or musiccame from TV.
SonyKV1945R
DEAD, REPLACED FBT AND OTHERS Set had a bad flyback causing multiple problems such asshorted horizontal output transistor and B+ regulator.
SonyKV1913
PICTURE NOISE This unit exhibited several faint vertical bars on the leftside and middle of raster.
SonyKV1714
PICTURE NOISE Retrace lines in the screen. Found R721 and R722 reversedin circuit.
SonyKV1545R
NO MANUAL OR REMOTE FUNCTIONS, REPLACED X002 No manual or remote functions. No 12 volt on Pin 12, IC004.Clock frequency was correct but only 0.5Vpp. Voltage on Pins 1 and 42 ofIC004 was the same on both pins, 0.6V.
SonyKV1543R
CHANNEL INDICATORS NOT LIT, LEAKAGE BETWEEN IC032/PIN 1 & 20 Unit would not come on with all channel indicators lit.Unable to select channels. Once in a while unit would function properly.


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