Dicas Reparação

Modelo - Chassis

Pesquisa: Enviar Dica Resolvida
Resultados 77788
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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.
DISASSEMBLY INSTRUCTIONS ARE MISSING No disassembly instructions are given for removal of thebutton assembly.
DEFECTIVE RECORD SWITCH Intermittent high frequency oscillation. Once started, theonly way to stop it was to engage record mode and return to play. Problemoccurred only in play mode.

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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