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Resultados 81712

MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyWM10
COLD SOLDER JOINT ON FLEXIBLE BOARD Unit stopped rewinding or fast forwarding several secondafter pressing REW or FF button. Found cold solder on the flexible boardbetween S901 and R634 as indicated in the diagram.
SonyTCK88B
UNIT OUT OF ADJUSTMENT Dealer complained of gross wow and flutter. Verified problem,measured 0.6% JIS weighted.
SonyTCK88B
LOOSE WIRE BETWEEN SERVO BOARD AND SYSCON BOARD Counter was intermittently not advancing. Determined thatIC602 derives count from supply reel revolutions using output of Q536 andQ535 on servo board.
SonyTCFX77
MISSING PART # IN MANUAL There is no P/N for the capacitor C134, 234 (56pF/500V),which are connected to the R/P head, in the service manual.
SonyTCFX44
DEFECTIVE RELAY Erratic system control operation. When record button isdepressed, unit will intermittently enter rewind mode after 2-3 sec(record deactivates). Results from high resistance of relay contacts.
SonySPP11
SERVICE MANUL INSTRUCTIONS P31. Lacking a linear detector, I adjust RV2 to energizebase relay.
SonySPP11
SERVICE MANUAL INSTRUCTIONS P10 of service manual instructs tech. to turn RV6 CCW forfreq. adjustment. It is my belief that it should read RV5, instead.
SonyPSX800
GLUE ON S/N 800439 Intermittent cue up/down malfunction. Symptom was no dampingaction. Checking output of vert. MFB DET coil with scope showed inter-mittent no signal or noisy erratic signal. Tan glue on the solderpads of the coil's PCB in the bearing assy caused proble
SonyPSX800
OPEN LEAD IN S/N 802218 Intermittent cue up/down malfunction. Symptom was no dampingaction. Checking output of vert. MFB DET coil with scope showed inter-mittent no signal. An open lead, confirmed with ohmmeter was the cause.
SonyKV1222R
BRIGHT PICTURE WITH RETRACE LINES Set would come on OK when very cold. Then after abouta minute, pix would get very bright and have retrace lines.
SonySTRAV880
NO POWER - UNIT DEAD Unit had no power - completely dead.
SonyD7
INSUFFICIENT LINE MUTING Insufficient line muting. When pushed, line output wasreduced by better than 40dB but not totally muted. Signal level slowlydropped off from this point and finally muted completely after severalseconds. The effect was not noticeable on headphone outpu
SonyKX2501
DEAD, CONNECTOR SHORTED,ALSO REPLACED Q652, Q651, AND Q653 Set came in dead. Found connector shorted and Q653 and Q651reading 40 ohms between base and emitter (forward and reverse the same).
SonyRM708
NO COMMANDER OPERATION This remote commander produced no infrared output. Thetransmit indicator did light.
SonyKV2650R
AFT DRIFT, LEAKY Q024 When you tuned a station it appeared as if the AFT wassearching before it locked in on the strongest portion of the signal.VC was changing slightly before it locked.



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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