Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 81001
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BRACKET ASSY OUT OF LOCATION This unit would eat tape because take up reel would not turn.The bracket assy was allowed to travel backwards (pulling against thespring) until it went past the plastic guide on the chassis assy. Onceit went past the guide, it could not come back forwar
IDLER WHEEL At end of tape unit will not auto reverse or shutoff. In thisunit the micro processor gets it's signal off the reel motor. At the endof the tape when take up reel was stopped at tend of tape the reel motorwas still dragging sending the pulse signals to
PART REPLACEMENT NEEDED Auto shutoff and bi-directional playback is intermittent.
ROUGH SPOT ON FR LIMITER In FWD or REW, when unit gets to end of tape, R1008 will gethot and twice R1008 opened for customer. Found flywheel to be almoststopping drawing around 180mA.
MODIFICATION NEEDED This deck produces short duration pops and snaps while playingTDK tape. (Same tape works OK in other Sony recorders.) -HQ COMMENTS: Please refer the attached S/B issued in Sony Canada and dothe same disposition. We will issue the S/B.
DEFECTIVE CAPACITORS Complaint was no PB both channels, REC vol. OK. First stageof EQ Amp was cut off, second stage saturated.
MAIN BOARD NOT GROUNDED With the exception of a click in both speakers when unit isengaged, dial lamps and cassette motor running, the unit is dead.
BRACKET NEEDS BENDING No take-up in fwd play mode. The latch on the idler bracketsometimes doesn't go over the stub on the chassis but goes to the sideof it and jams there.
TOO MUCH LOAD ON MOTOR FROM MECHANISM Servicer reports that replacement motors for TC-630 andTC-105 recorders do not have as much torque as original motor. -HQ COMMENTS: We installed the motor which you sent for evaluation intoTC-630D. The tape speed of the tape deck was originally +0.6T i
HUM IN HEADPHONE When tape monitor or any input switch is engaged, a hum isnoticed in the headphone output. Problem occurs due to current flowingthrough common ground connections from pilot lamps.
COLD SOLDER CONNECTION Protection circuit relay, RY701 would actuate intermittentlywhen volume was turned up from about 3 click-stop positions to the 9o'clock position.
DEFECTIVE IC'S 4140, UPB4011 No playback and no record.
DRIVE BELT GETS STUCK Several units came in with no movement at all. In all casesthe drive belt was stuck between the motor pulley and motor.
DIFFERENT TRANSISTOR USED Transistor 2SD666A is used in the unit. However, the partsdescription has it listed as 2SC1811. A further check with the transistorsubstitution book did not verify that one is a substitute of the other.
FRAGILE CONNECTOR The connector used to wire the main board to the functionboard is too short and fragile. During repairing, any pressure appliedcan cause it to short or keep the radio on. It is also difficult tostrip and solder.

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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