Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 79255
Pedir dica reparação
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.
CLOCK DISPLAY DIMS, REPLACED DISPLAY Clock display dims when touched by hand. Display flickerswhen someone walks by TV.
NO COLOR, REPLACED SHORTED CV301 After about 2-3 minutes of playing time color disappeared.Found CV301 actually physically shorted to 0 ohms.
NO UHF, REPLACED Q203 During programming unit would skip UHF band. 12V B+ was low(10.5V), Q203 was bad.
INCORRECT FUNCTION FOR TUNING, Q2211 LEAKY During programming unit would not stop on active channels inone direction from low to high.
NO TUNING LOCK, REPLACED C219 Would not lock on to any channel in program. AFT voltage pin#10, IC201 down to 0.4V.
CHANNEL DRIFT, REPLACED IC2003 Set would drift off channel during operation. Found IC2003(display memory) apparently loading control IC and changing PWM voltage.
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.
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
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.
NO STATION SELECTION, REPLACED IC032 Stations wouldn't select and sound would turn up but wouldn'tgo down.
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).
RETRACE LINES, REPLACED CX556 Set would gradually change from normal to retrace lines.Video signal on output of CX556 changing level.
NO SOUND, REPLACED IC033 This customer has a lot of static from carpets in the home.A spark jumps from her finger each time she touched the channel selectionbuttons. This time it took out IC033. The last time IC2001 failedcausing no sound. On the IC033 Pin 10, ch. bias voltag
PICTURE DRIFT, REPLACED C516 Dealer expressed concern over the fact that although thevertical was normal and the vertical hold was OK, the position where thepicture locked in was not in the mechanical center of the control infact it was to one end of the control.

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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