Service Manuals, User Guides, Schematic Diagrams or docs for : IBM 360 fe 2020 SY33-1042-1_2020_FEMDM_Vol_2_Nov69

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                                              Field Engineering

                                              Maintenance Diagrams




Processing Unit

System/360 Model 20
(Machines with serial no. 50,000 and above)                 Volume 2




                                                                   SY33-1042-1
     Preface




 This publication (Volume 2) and its companion publication (Volume 1,                               5. 2560 Multi-Function Card Machine Attachment Feature, 2501 Card
 Form Y33-1024) constitute the Field Engineering Maintenance Diagrams                                  Reader Attachment Feature, 1442 Card Punch ModelS Attachment
 manual for the IBM 2020 Processing Unit (machines with serial number                                  Feature, System/360 Model 20 (Machines with serial no. 50,000 and
 50,000 and above) in the IBM System/360 Model 20. Volume 2 contains                                   above), Form Y33-1033.
 operations information (Section 5) and Volume 1 contains information on                            6. Binary Synchronous Communications Adapter, System/360 Model 20
 the following:                                                                                        (Machines with serial no. 50,000 and above), Form Y33-1039.
     Diagnostic techniques (Section 1)                                                              7. Input/Output Channel Feature, System/360 Model 20 (Machines with
     Error conditions (Section 2)                                                                      serial no. 50,000 and above), Form Y33-1017.
     Data flow (Section 3)                                                                          8. Storage Control Feature, System/360 Model 20 (Machines with serial
     Functional units (Section 4)                                                                      no. 50,000 and above), Form Y33-1037.
     Power (Section 6)                                                                                Information on the serial I/O channel feature is contained in Field
     Microprograms (Appendix B)                                                                     Engineering Theory of Operation, Maintenance Diagrams, Serial 1/0
   Both volumes are used for maintenance, instruction, and recall.                                  Channel A ttachment Feature, System/360 Model 20 (Machines with serial
   The material in these volumes supplements the information contained                              no. 50,000 and above), Form Y33-1040.
 in the following manuals:                                                                            The associated Field Engineering Theory of Operations manual for the
 1. Field Engineering Theory of Operation, 2020 Processing Unit,                                    features are:
     System/360Model20 (Machines with serial no. 50,000 and above),                                 1. 1403 Printer Models 2, 7, Nl Attachment Feature, System/360 Model
     Form Y33-1021.                                                                                    20 (Machines with serial no. 50,000 and above), Form Y33-1020.
 2. Field Engineering Maintenance Manual, 2020 Processing Unit,                                     2. 2152 Printer-Keyboard Attachment Feature, System/360 Model 20
    System/360 Model 20 (Machines with serial no. 50,000 and above),                                   (Machines with serial no. 50,000 and above), Form Y33-1025.
     Form Y33-1035.                                                                                 3. 2203 Printer Attachment Feature, System/360 Model 20 (Machines
                                                                                                       with serial no. 50,000 and above), Form Y33-1027.
 Associated Publications                                                                            4. 2520 Card Read Punch A ttachment Feature, System/360 Model 20
 The follOWing Field Er

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