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dr) g5~ Field Engineering
Maintenance Manual
System/360 Model 50
2050 Processing Unit
SY22-2832-4
PREFACE
To obtain the most benefit from this manual. the
reader fhould have a basic knowledge of System/360
concepts and general programming. and a working
knowledge of the logical and physical operation of the
2050 Processing Unit. The manual includes diagnostic
aids t maintenance features I and maintenance pro-
cedures along with reference material that will aid
in troubleshooting and maintaining the System/360
Model 50.
Other Field Engineering Manuals written for the
System/360 Model 50 include:
Comprehensive I:atroduction, FETOM SY22-2B21
Functional Units, FETOM SY22-2B22
Capacitor Read-Only Storage, FETOM SY22-2B23
RR, RX Instructiops, . FETOM SY22-2B24
RS, SI, SS Instructions, FETOM SY22-2B25
Selector Channel, Common Channel, FETOM SY22-2B26
Multiplexor Channel, FETOM SY22-2B27
Main Storage, Local Storage., Storage
Protection, FETOM SY22-282B
Power Distribution and Control, FETOM SY22-2B29
Features, FETOM SY22-2B30
2050 Procestling Unit, FEMDM SY22-2B33
2050 Processing Uni t, FEIM SY22-9501
Fifth Edition (March 19i1l
This is a major revision of, and obsoletes, SY22-2B32-3. Maintenance strategy
diagrams have been revised, expanded, and placed in the 2050 FEMDM. All CPU
timing information has been removed from this manual and placed in the ALD's,
Volume 1, Page AAOOO. Other changes or additions to text and illUltrations are
indicated by a vertical line to the left of the chang~.
Changes are periodically made to the specifications hereinj any such changes
will be reported in subsequent revisions or FE Supplements.
This manual has been prepared by the IBM Systems Development Division, Product
Publications, Dept. 896, PO Box 390, Poughkeepsie, N. Y. 12602. A form is pro-
vided at the back of this publication for reader's comments. If the form has been
removed, comments may be sent to the above address.