Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 80995
Pedir dica reparação
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.
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.
POOR REMOTE OPERATION, REPLACED IC1, CX-786 IN COMMANDER Poor sensitivity with remote approx. 6 feet.
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
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.
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.
SNOW PICTURE, RESOLDER R053 Set displayed snow on all channels. I found R053 on MF boardimproperly soldered.
SET WOULD NOT TURN ON/OFF BY REMOTE, IC-101 Set would not turn on/off.
COLOR DISTORTION, REPLACED R751 Bleeding color (red). Found R751/470kohm resistor changedvalue.
RASTER PULSATING, REPLACED R609 Picture and raster pulsating. The 135V line exhibited samepulsation.
NO PICTURE, FBT Set kept shorting out the horizontal output transistor.
PICTURE DISTORTION Set had light vertical bands in picture. They started on theleft and became less bright as you moved to the right. Horizontal outputwaveform was affected as well.
PICTURE DISTORTION, REPLACED C524 Set would go into vertical bounce after warm-up.
SNOW PICTURE, REPLACED PRESCALER Snow on all channels. No output from prescaler.
SOUND AND PICTURE DISTORTION, REPLACED IC005 Volume 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.

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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