Dicas Reparação

Modelo - Chassis KV1221R

Pesquisa: KV1221R Enviar Dica Resolvida
Resultados 7
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SHUTDOWN, REPLACED Q601 Using an isolation transformer, unit will work properly.When using the wall outlet, unit will not turn on. The only diff. foundwas the isolation transformer output was 8VAC less than the wall outlet.
INTERMITTENT TURN OFF, REPLACED IC001 This unit would intermittently turn off. We found the remotedecoder IC (IC001) to be thermally sensitive.
SHUT DOWN, REPLACED R001 After warm-up (or after simply plugging in and not turningon for 1/2 hour or so), the unit could not be powered up. If unit ison, it will then not turn off. Remote or manual same. IC001 was bad andthe relay drive transistor as originally suspected.
NO REMOTE CONTROL FUNCTION, REPLACED C007 There were no remote control functions. The volume up/downfunctions would shut set on and off. Manual input of IC (remote control)Pin 1 always had a noise pulse and frequency at this point was incorrect.This noise pulse inhibited any input data from re
NO ON/OFF FUNCTION, REPLACED RL001 Unit would not shut down manually or on remote. Whenattempting to turn off set with manual switch or remote, the sound wouldmute, but the raster would remain. Tapped on the case of relay RL001.Power immediately went off. Found RL001 was hanging up due
SNOW PICTURE, REPLACED C038 Every 2 weeks picture would go to snow and remain in onechannel position. Tuning functions totally inoperative and manual channelselection would not work. Volume up and down functions OK. Clock osc.waveform wrong also voltage at Q034 base 0V should be
PICTURE DISTORTION, REPLACED C524 Picture pulled up 3 inches on bottom of the screen and upperright hand corner blanked. Found C524 off Pin 13 IC301 was installed withpolarity reversed.

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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