Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 73930
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SonyCFS55BELT SLIPS OFF If the unit comes in with BELT OFF my S/S advises me that oneshould change the belt along with any repair or it will come back as aRE-REPAIR in a short time. -HQ COMMENTS: Replace the motor pulley when the capstan belt slippedoff the motor pulley in the
SonyCFS45PCB MOUNTING SCREW BREAKS FOIL TRACE Circuit board mounting screw is tightened too much. Cracksbreak B+ path to function switch.
SonyTPSL2DEFECTIVE MOTOR Unit runs slow.
SonyTCM121MECHANICAL MODIFICATION When customer presses record button with no tape inserted,pressure of record lever assy. against chassis causes the lever retainingportion to break off. Since the retainer is part of the chassis assembly,the entire assy would have to be replaced.
SonyTCK55IIDEFECTIVE REMOTE CHIP Unit functions jammed in rewind mode voltages on Pin 33 was0.37 volts. Rewind mode voltage should read 10 volts. Voltages ofremote chip Pins 9, 5, 11 and 7 were 1.9V also should be 10 volts.Remote chip affected total operation of tape deck.
SonyTC755CLEANING STOP MICROSWITCH Low playback level off tape, SOURCE position OK. Recordsection checked OK, found playback amp was being muted by Q304 and Q404.Base measure 1.6V all the time. Lifted R437, playback level normal.Traced 1.6V back into system control ckt., to emitter of Q
SonyTAF3APCB LABELLING INCORRECT Q103/104/153/154 - 3 and 4 reversed on PCB labelling. -HQ COMMENTS: Thank You for this information.
SonyPT79RPART NUMBER ERROR I had ordered a power transformer, P/N 1-446-639-00, for USAmodel which I copied the number directly out from the service manual. Thetransformer that was sent to me was coded with the same number as was themanual but instead it was of 220 volts. Later
SonySTRV25ERROR IN MANUAL Page 7 Procedure 2, error adjust RT101 for 76 kHz +/- 100 Hz.This is opposite STR-V2/-V3/-V4.
SonySTRV25MODIFICATION ON MOUNTING FLAME PROOF RESISTORS Q652 failed causing flame proof resistors R633, 664, 665 tooverheat and open. This type resistor gets very hot before opening sincethese are mounted tight against the board. Damage will occur when theyget hot.
SonySTRV5DEFECTIVE IC451 No output, meter and lights operating, relay activates. B+and B- low.
SonySTRV3ERROR IN SERVICE MANUAL The schematic (Page 20) shows bias test points incorrectly atcollector of Q713 and Q763. Should be at emitters. -HQ COMMENTS: See Technical Newsletter #8102.
SonySTRV2ERROR IN SERVICE MANUAL VCO adjustment Page 9, Procedure 2, adjust RT201 for 19kHz+/- 100Hz error.
SonyICFC11WCLEAN AND ADJUST SWITCH Alarm set time shows upon auto buzzer.

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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