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                                                                       Bulletin No. 233
                                                                       64 Memory Maintenance




                             64 2 MEMORY MAINTENANCE
                       REMOVAL AND REPLACEMENT PROCEDURES



                                                     July, 1958




                                       MILITARY PRODUCTS DIVISION

                       INTERNATIONAL BUSINESS MACHINES CORPORATION

                                                  KINGSTON, NEW YORK
                                                                                   IBM
                                                                                  r-1
                                                                                  KINGSTON

The work reported in this document was performed under a                          ~
government contract. Information contained herein is of a                         TECHNICAL
proprietary nature. ALL INFORMATION CONTAINED                                    PUBLICATIONS
HEREIN SHALL BE KEPT IN CONFIDENCE. No informa-
tion shall be divulged to persons other than IBM employees
authorized by the nature of their duties to receive such in-
formation or individuals or organizations who are author-
ized in writing by the Department of Engineering or its ap-
pOintee to receive such information. GOVERNMENT RE-
LEASE MUST BE OBTAINED THROUGH THE CONTRACT
ADMINISTRATION DEPARTMENT BEFORE THlS INFOR-
MATION MAY BE USED FOR COMMERCIAL APPLICA..
TIONS.                     .
               UNCLASSIFIED




                 FOREWORD

The information contained herein supersedes
the. related text on removal and replacement
procedures in the Preliminary Maintenance
Data Book on Core Memory, and in T.O.
31P2-2FSQ7-142 dated April 1, 1957. Sup-
plementary information on memory array
assembly and part details is available in
Volume In of T.O. 31P.2-2FSQ7-4, Illustrated
Parts Breakdown (first revision) pages 322-
359.

This bulletin is intended to be self-contained
with regard to removal and replacement pro-
cedures only. In those instances where re-
placement of a critical unit necessitates
electrical adjustment, reference is made in
the text to the applicable Instruction Bulletin.




               UNCLASSIFIED
                                            UNCLASSIFIED

                                    TABLE OF CONTENTS

Heading                                                                                                                Page

1..        Memory Array Cover Removal                      

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