IBM Bulletin 231 64 2 Memory Preventive Maintenance Procedures Jul58 free download

File name Bulletin_231_64_2_Memory_Preventive_Maintenance_Procedures_Jul58.pdf

BULLETIN NO. 231 2 64 MEMORY MAINTENANCE 2 64 MEMORY PREVENTIVE MAINTENANCE PROCEDURES July, 1958 MILITARY PRODUCTS DIVISION INTERNATIONAL BUSINESS MACHINES CORPORATION KINGSTON, NEW YORK IBM f ~D 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 THIS INFOR- MATION MAY BE USED FOR COMMERCIAL APPUCA- TIONS. FOREWORD The information contained herein has never appeared in any previous publication. It rep- resents the initial step of providing scheduled preventive maintenance checks for the 64 2 memory. The preventive maintenance checks are func- tionally divided into two groups; those requir-. ing scoping, and those not requiring scoping such as mechanical, resistance, and voltage checks. It is recommended that all checks be performed in accordance with the schedule provided in the text. This schedule reflects current concepts of equipment requirements and is subject to review based on field experi- ence. Valuable computer time will be saved if the reader familiarizes himself with the contents of this Instruction Bulletin before proceeding with the checks. It will be noted that where outside references are required the reader is directed, in the text, to the applicable In- struction Bulletin. Comments on this Instruction Bulletin are solicited from the field. It is recognized that maintenance is a dynamiC undertaking and that new and improved techniques and proce- dures are the inevitable result of on-the-job experience. Forward all correspondence to Field Technical Assistance, Department 912, Kingston, New York. TABLE OF CONTENTS Heading