Service Manuals, User Guides, Schematic Diagrams or docs for : Sony HiFi Service Bulletin HFP0479

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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

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