Dicas Reparação




Modelo - Chassis F7


Pesquisa: F7 Enviar Dica Resolvida
Resultados 183
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MarcaModelo
(Chassis)
SintomaCausaSoluçãoPor:
SonyCCDF77
SERVICE MODE ERROR CODES ERRONEOUS Old error codes were not erased from memory by previousservicer. This is contrary to instructions on page 58 of Supplement No.1 which states Be sure to rewrite the addresses from 20 to 26 to Data 00after the operation. This provided erroneous first (or
SonyCCDF77
TAPE PATH ALIGNMENT Tape path entrance and exit out of alignment.
SonyCCDF70
UNIT INOPERATIVE Unit is inoperative.
SonyWMF76
NO SOUND WHEN USING TAPE Tape is running but no sound. Radio works ok. Service manualon page 18 mark two part number for Q-602.
SonyCCDF77
RANDOM AUTOFOCUS AND ZOOM OPERATION Random autofocus and zoom operation. Found missing data frompin 51 and 52 SCK on IC-501.
SonyCCDF77
NO PICTURE IN VIEWFINDER No picture in viewfinder and found C-171 shorted.
SonyCCDF77
NO POWER OR DISPLAY No power, display off, system control dead. This is thesecond unit with this problem.
SonyICF7601
NO AUDIO UPON POWER-UP Unit powers up - no audio.
SonyCCDF70
DD MOTOR NOISE RECORDED DD motor noise is recorded in audio. I changed the DD motorand customer is still not happy.
SonyCCDF77
NO VIDEO IN EVF HAS RASTER No video drive to pin 3 of CN-904 on the VF-26 board insidethe EVF. Note: I noticed a large amount of viewfinders on backorder toKC. I found two problems 1. a bad connection on CN-506 pin 8 of theVA-46 board 2. Bad transistor Q-171 EVF buffer also on t
SonySLHF750
UNIT DOES NOT THREAD/UNTHREAD TAPE Unit would not thread/unthread tape by supplying external DCvoltage to threading motor. Relay gear assembly would slip and chatter.Noticed that the shaft on which this gear assembly mounts on was pushedupwards and didn't enter the hole designated for it
SonyCCDF77
NO POWER Only the display came on, nothing else works. Unit had noSS.5 volts.
SonyWMF75
NO TAPE AUDIO; SLOW SPEED - RADIO WORKS OK The tape speed was slow and there was no audio when playingback a tape. The radio worked ok. We found the problem to be a shortbetween the head Ground wire (black) and the chassis ground. On thisunit the black head wire is not at chassis ground potent
SonyCCDF77
CCD-F77 ALIGNMENT PROCEDURE There are many mistakes in the CCD-F77 alignment procedure.Will a bulletin be issued covering this? -HQ COMMENTS: A service bulletin will be issued describing thecorrections. See CSV-2 #198.
SonyCCDF70
VERY SHAKY PICTURE WHEN RECORDING When recording, capstan motor would have a jittering motion toit. Capstan and drum FG was unstable.


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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