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Hi-Fi Products CSA-13
Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656

Model: MDS-101, MDS-501, MDS-302, MDS-503, MDS- No. 479
JA3ES, MDS-S35

Subject: Procedure for Resetting the Micon when Date: April 5, 1996
Replacing the Digital Board

Symptom:
(**) When replacing the Digital Board misoperation may occur when the unit is powered
ON.

Solution: If misoperation occurs after replacing the Digital board, perform the following
procedure:

Remove the power cord from the A/C recepticle. Verify that the replacement Digital
board, which contains the System Control Microprocessor, has been properly
installed and connected.

Short the positive (+) lead of the back-up capacitor (approx. 1F/5.5V) to ground for
roughly one second. Plug the power cord into the A/C recepticle and switch the unit
ON.

Note: When performing this operation all memory (i.e. clock/date settings,
autospace, shuffle, program play, etc...) will reset and the unit will revert to the
original factory settings. As these settings vary from model to model please refer to
the Operating Instructions manual for details.

Reference: Japan Technical News AU-95031 PRINTED IN USA

PRINTED ON RECYCLED PAPER