IBM System/23 Datamaster Maintenance Guide: Difference between revisions

This guide covers maintenance of the '''[[IBM System/23 Datamaster]]''' 5322, the one-piece desk-top unit with a built-in display, keyboard and up to two 8-inch diskette drives. It follows IBM's [[IBM 5322 Computer Service Manual|5322 Computer Service Manual]] (SY34-0171-0) and [[IBM System 23 Diagnostic User Guide|Diagnostic User Guide]] (PN 6841631). The floor-standing 5324 has its own service manual, SY34-0241-1 (May 1982), [[:File:IBM 5324 Computer Service Manual SY34-0241-1.pdf|hosted here]].<ref name="bs">bitsavers, [http://bitsavers.org/pdf/ibm/system23/fe/ ibm/system23/fe] (retrieved 2026-09-30): SY34-0171-0 5322 Computer Service Manual, SY34-0241-1 5324 Computer Service Manual (May 1982), Diagnostic User Guide 6841631 (August 1981 and April 1982 editions), 5324 MAPs; and [http://bitsavers.org/pdf/ibm/system23/5247/ ibm/system23/5247]: SY34-0243-0 5247 Disk Unit Service Manual (April 1982).</ref>

'''IBM's DANGER notice: up to 800 V AC is generated in the power supply.''' Before removing the supply or any part of it, switch off the 5322 and disconnect the power cable from the outlet.<ref name="sm221">IBM, ''IBM 5322 Computer Service Manual'', SY34-0171-0 (December 1980), item 1240, p. 2-21, power supply removal and replacement ([[IBM 5322 Computer Service Manual|hosted here]]).</ref>