Dicas Reparação




Modelo - Chassis


Pesquisa: Enviar Dica Resolvida
Resultados 81447
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonySRF80W
POOR CONNECTION AT Q502, D501 Radio would not work on batteries. It would work if placedin case with speakers. Power was taken from amplifier unit.
SonyPST33
MAGNET OUT OF POSITION Platter would not turn. Magnet fell out of solenoid detectinglever.
SonyHMK119
WARPED TURNTABLE Record rubs on frame causing drag.
SonyCFS67
OPEN R308, MOTOR AND FUNCTION SWITCH No power in any function. Resistor 308 is open, switchfunction is shorted in tape mode and tape motor is at first shorted andthen open. -HQ COMMENTS: Charging current for C305 (1000uF) through the R308 burnsthe R308. We should replace it with other va
SonyTR3230
DEFECTIVE Q1 No sound output. No sound with tracer at volume control.Voltages of emitter to base of Q1 were improper.
SonyTPSL2
TYPICAL WOW AND FLUTTER ON THIS MODEL Excess speed variations when the unit was used for jogging.Units measured about 0.3% to 0.4% wow anf flutter while at rest, and wouldvary between 0.5% and 0.8% while jogging around the test equipment.
SonyTCK65
DEFECTIVE MOTOR Customer complained that intermittently, unit would lock up,no functions would work. Found that intermittently, capstan motor wouldnot start up when power was applied to the unit.
SonyTCD5M
DEFECTIVE Q-901 Fast forward and rewind are stopped after running a fewseconds.
SonySRF80W
LEADS OF C606 NEEDED INSULATION Intermittent speaker popping on left channel. Problem wouldnot arise when using headphones but only when radio installed in poweredspeaker unit.
SonyPSX40
SHORTED MOTOR Very low drive torque, Q103 and Q104 low outputs. No signalat emitter of Q103 and Q104 - measure emitter of Q103 and Q104 to groundreading should be 38 ohms. L3 and L4 of motor measure short.
SonyPST22
MOTOR HUM AT START-UP At start up of motor for about 1/2 revolution of platter thereis a hum, then a pause, as soon as the motor is up to speed hum stops.
SonyICFC310W
MODIFICATION TO INCREASE BUZZER OUTPUT Customer is complaining the buzzer is not loud enough.Buzzer becomes loud enough when the sleep switch is on. At that timeQ6 collector receives 12V for a louder amplification than the 6 volts itsees when the buzzer is on by itself. What can be done to
SonyICFC15W
DISCONNECTED Q9 Distorted sound in audio section. Used signal tracer to findbreak in landing at the collector of Q9.
SonyICF7600
LOOSE CAPACITOR Capacitor had pulled away on the tone control board.
SonyHMK414
EJECT BUTTON OUT OF PROPER LOCATION When unboxed, eject button pushed inside of unit. No damageto box.


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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