Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 77938
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyKV1945R
COLOR DISTORTION, REPLACE IC301 No blue, yellow picture. Base voltage at Q701 was 0 volts.Output at Pin 28 at IC301 0 volts, input to IC good.
SonyKV1913
NO PICTURE Loss of vertical deflection.
SonyKV2643R
SHUT DOWN, REMOVED L810 This unit would shut down by itself. The picture wasexpanded in size (a lot of overscan). The HV was 3KV lower.
SonyKV2643R
SOUND NO MUTE DURING CHANGE, REPLACED Q042 Sound would not mute during channel change. Checked Pin #13of IC032 positive pulse was present during channel change, therefore,Q042 was suspected.
SonyKV2643R
CLOCK DISPLAY DIMS, REPLACED DISPLAY Clock display dims when touched by hand. Display flickerswhen someone walks by TV.
SonyKV2601
NO COLOR, REPLACED SHORTED CV301 After about 2-3 minutes of playing time color disappeared.Found CV301 actually physically shorted to 0 ohms.
SonyKV2601
NO UHF, REPLACED Q203 During programming unit would skip UHF band. 12V B+ was low(10.5V), Q203 was bad.
SonyKP5000
INCORRECT FUNCTION FOR TUNING, Q2211 LEAKY During programming unit would not stop on active channels inone direction from low to high.
SonyKV2644R
NO TUNING LOCK, REPLACED C219 Would not lock on to any channel in program. AFT voltage pin#10, IC201 down to 0.4V.
SonyKV2643R
CHANNEL DRIFT, REPLACED IC2003 Set would drift off channel during operation. Found IC2003(display memory) apparently loading control IC and changing PWM voltage.
SonyKV2643R
RETRACE LINES, BROKEN LAND ON C BOARD Servicer informed me of a problem where the picture would benormal and then get brighter and go into retrace and then back to normal.Then it again would repeat itself.
SonyKV2643R
DEAD, REMOVE JW54 AND OTHERS No operation above 100VAC. H. voltage was at 23KV. Servicerhad replaced flyback and IC501. Voltage to shutdown circuit was 5.7V.Removed L801, H. voltage went up to 26KV. -HQ COMMENTS: We will publish updated info on this problem shortly. Asfor now c
SonyKV1714
NO VIDEO No video. Just snow only. But if you adjust the tuningselector you can get ch. 7 and ch. 5 but if you go back to ch. 5 thesignal in ch. 7 will be erased. No -24V source.
SonyKV1543R
NO STATION SELECTION, REPLACED IC032 Stations wouldn't select and sound would turn up but wouldn'tgo down.
SonyKP5000
CHANGES CHANNEL BY ITS SELF, REPLACED INFRARED SENSOR Unit would change channels without manual or remote activa-tion. Customer indicated that remote functions would not coincide withremote hand unit when warm (this problem was intermittent).


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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