Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 79415
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV2645R
NO REMOTE OPERATION, REPAIRED CRACK ON N BOARD Unable to control operation with remote. Found hairlinebreak on N board.
SonyKV2643R
UNDER SCANNED PICTURE, R533 VALUE CHANGED, REPLACED Picture under scanned horizontally and vertically. Foundresistor R533 changed value, should read 1.2 ohms, read 14 ohms.
SonyKV2602
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.
SonyKV2145R
NO VIDEO/SOUND, REPLACED PRESCALER No video - no sound.
SonyKV2145R
DARK PICTURE, REPLACED BRT CONTROL Unit loses brightness (goes black) intermittently. VoltageOK, TP49 goes low whenever problem occurred. Found brightness controlshorting to its case.
SonyKV1946R
DEAD, FBT Flyback arc over.
SonyKV1946R
SOUND NOISE, REPLACE T206 This unit had a background hiss in the sound. AdjustingT206 did no good. Found T206 had the incorrect transformer installed.P/N 1-403-360-13 was marked on the outside.
SonyKV1913
SHUT DOWN At turn on, set would shut down after a few minutes to a fewhours.
SonyKV1913
NO SOUND Sound goes on and off, cooling C226 would confirm problem.
SonyKV1746R
SHUT DOWN, INSTALLED C547 AS PER T/N This unit would intermittently go into HV shutdown.
SonyKV2644R
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.
SonyKV2643R
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.
SonyKV1945RS
POOR REMOTE OPERATION, REPLACED IC1, CX-786 IN COMMANDER Poor sensitivity with remote approx. 6 feet.
SonyKV1945RS
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
SonyKV1945R
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.


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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