Dicas Reparação




Modelo - Chassis KV1943R


Pesquisa: KV1943R Enviar Dica Resolvida
Resultados 11
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SonyKV1943R
IMMEDIATE SHUT DOWN, REPLACED C-539 Unit came in dead. After replacing shorted Q-901, Q-902 andopen F-603 regulated +115VDC read about 130VDC. Replacement of IC-601didn't help. Scoping TP-91 for ripple found about 4VPP horizontal rate.
SonyKV1943R
NO TUNING - LED CHANNEL INDICATORS ALL LITE UP, L-511 OPEN Turn unit on, all channel indicators (LED) are lite up, noreception. Checked: 24VDC is missing from IC-034.
SonyKV1943R
TUNER LOCKS UP, RUBBER CONTACT, 9-919-577-00 Tuner was locked up on Channel 5. When channel button waspressed, the picture from other channels would appear for an instant, thenrevert back to Channel 5. Volume and power would not function.
SonyKV1943R
POOR HORIZ SYNC ON WEAK STATIONS, REPLACED RV501 The unit worked fine on strong signals. However, whenreceiving a weak signal the horiz. sync would be poor. We at first lookedat the IC, but the problem turned out to be RV501. It was very noisy.
SonyKV1943R
FOLD OVER ON TOP OF PICTURE, REPLACED C-523 The unit has a fold over on the top of the picture and doesnot fill the screen. The problem is caused by C-523 drying out. This isbecoming a more common problem with this chassis now because the capacitoris located near components that become warm and
SonyKV1943R
BLANKING - VERT PROBLEMS, REPLACED C529 Set was stretched on bottom three inches of screen. The topfour inches were fine but there was a black vertical bar that was aboutone inch wide on the left and widened to three inches on the right side.It was blacked out in this one area only. Adjustin
SonyKV1943R
NO POWER ON, REPLACE C001 AND C003 The unit would not turn on.
SonyKV1943R
DEAD, REPLACED BRIDGE DIODES AND FILTER CAP Four times within the past 3 years customer has had to havelow volt diode replaced. Found that only one diode at a time was beingreplaced. Found filter cap leaky. Replaced all 4 diodes along withthe filter cap to help prevent further customer aggravat
SonyKV1943R
NO LOCK CHANNEL AND VOLUME, OPEN C001 ON M2 BOARD Set would change channels on its own. Also sound would go upon its own. Found C001 on M2 board opened.
SonyKV1943R
INTERMITTENT SOUND, REPLACED C226 Highly intermittent audio. Slight popping noise beforegoing out.
SonyKV1943R
INTERMITTENT SOUND, REPLACED T207 Sound intermittently goes dead. Troubleshooting indicatesthat the sound is not passing through the IF section. Isolated problemto T207.


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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