Dicas Reparação SONY




Modelo - Chassis


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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonySTRD990
UNIT CYCLES OFF IMMEDIATELY WHEN POWERED UP Unit immediateley shuts off when powered up. Fuses were allfine.
SonyTRWR670
AFTER UNIT HEATS UP, HEAD ASSEMBLY JUMPS ERRATICALLY, IC802 After unit warms up, heads continue to jump erratically.
SonySEQ711
COULD NOT SELECT BETWEEN TAPE AND LINE FUNCTIONS Unit only worked through line inputs. It could not switch totape mode.
SonyTADL100
NO AUDIO/COMMUNICATION IS OK No audio out of decoder board. EFM is ok. Found cold solderjoint on X-201 and case ground shield.
SonyCFD757
DISTORTED AUDIO ABOVE LEVEL 5 - L-308 (OPEN) Audio distorts above level 5. Sounded like feedback. I couldsee on scope distortion at selector IC. Finally disconnected MIC AMP ICand distortion won't go away. Ohmed out MIX MIC jack and found it not tobe grounded through L-308 which was open.
SonyTADL100
DISTORTED AUDIO Audio distorted, signal clipped.
SonyCFD460
CD PLAYS INTERMITTENTLY CD would play intermittently. Q-706 junctions checked ok withan ohmeter.
SonySTRD790
NO DISPLAY AND UNIT WORKS Checked AC voltage and +30 volt lines to display and both weregood. Replaced FL-101 without resolving problem. Traced the FL clock andFL data to system control IC-202 pins 18 and 19. Found below standardsoldering on this IC.
SonyKV27EXR15
PICTURE GETS DARK INTERMITTENTLY, RESOLDERED R-739 Picture gets very dark intermittently. It shows color only.
SonyCCDFX410
UNIT CHATTERS WHEN FULLY LOADED/UNLOADED Using the mode box when unloading STOP and FWD lights wouldkeep repeating.
SonySTRAV1070X
ERRATIC SYMPTOMS Servicer has four units with the following symptoms:1. Remote may not work. 2. On and Off by itself. 3. E is on display.4. No display. 5. Surround and DRLC relays On and Off by themselves. 6.Cannot turn unit off. Procedure from service bulletin No.
SonyKV20EXR20
LOUD MECHANISM HUM, GLUED SHIELD (T-602) Metal shield around T-602 is loose, causing mechanical 60Hzhum or buzz. Have seen this on sevreal other units also.
SonyCDXA55
PART NUMBER CORRECTION: CONNECTOR FLEXIBLE BOARD (REF. 102) This flex cable does not fit in unit. This part # shows upin the system for model CDX-U300. The part number taken from the flexconnector of the CDX-A55 is 1-643-777-11, which substitutes to1-646-391-11.
SonySPPA60
HANDSET TRANSMIT FREQUENCY IS LOW X-501 is defective preventing IC-501 (PLL) from operatingproperly. X-501 is producting a low amplitude which is not sufficient tocorrectly run IC-501 (PLL). This also prevents the TX frequency frombeing adjusted to the correct frequency. Also applies
SonySPP75
HANDSET TRANSMIT FREQUENCY HIGH OR LOW - REPLACE X-651 X-651 is defective preventing the adjustment of the handsettransmit frequency. The TX frequency can be either high or low. I haveseen many of both circumstances. Also applies to serial number 1127339.


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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