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The '''IBM PS/2 Model P70 386 Hardware Maintenance Service''' is IBM's 33-page service pamphlet for the PS/2 Model P70 386 (8573). '''Part number 15F2198, form number S15F-2198-00, First Edition (March 1990)'''. It is the fault-isolation half of the pair; the [[IBM PS2 Model P70 386 Hardware Maintenance Reference|Hardware Maintenance Reference]] is the removals-and-locations half.
== What it contains ==
* '''1.0 General Checkout''' and '''2.0 Installed Devices List''' — automatic configuration, device types, SCSI and non-SCSI devices.
* '''3.0 Undetermined Problem''' — IBM's isolation-by-removal sequence.
* '''4.0 Power Supply Voltages''' — the connector-pin measurements for this chassis.
* '''5.0 Enable and Disable Settings''', '''6.0 External Display Self-Test''', '''7.0 Display Adapter 8514/A''', '''8.0 Keyboard''', '''9.0 Printer''', '''10.0 Memory'''.
* '''11.0 Symptom-to-FRU Index''' — the numeric POST codes and beep symptoms mapped to FRUs.
* '''12.0 How To Use This Parts Catalog''' (with a worked example) and '''13.0 Parts'''.
== What it does not contain ==
'''Module level only.''' IBM serviced these machines by field-replaceable-unit exchange, and this pamphlet reflects that: it names FRU part numbers, not component values. There is no capacitor list, no resistor list, no semiconductor list and no schematic anywhere in it. The power supply, the planar and each drive are single line items in the parts catalogue. This is why no IBM machine checked in this wiki's verification drive has a published component-level capacitor list — it is not that the manuals were lost, it is that IBM never wrote one.
It is also '''not a standalone book'''. IBM issued it as a pamphlet to be filed in a binder alongside the general-purpose ''IBM Personal System/2 Hardware Maintenance Reference'' (part number 15F2190, form number S15F-2190-00) and ''Hardware Maintenance Service'' (part number 15F2200, form number S15F-2200-00), which carry the safety information, the general checkout procedure and the option and adapter sections. Those two general volumes are not hosted here.
<pdf> File:IBM PS2 Model P70 386 HMS.pdf </pdf>
<pdf> File:IBM PS2 Model P70 386 HMS.pdf </pdf>


IBM PS/2 Model P70 386 (8573) Hardware Maintenance Service. IBM part number S15F-2198.
Download it here: [[:File:IBM PS2 Model P70 386 HMS.pdf|IBM PS2 Model P70 386 HMS.pdf]]
 
== Related pages ==


Download the IBM PS2 Model P70 386 Hardware Maintenance Service here: [[:File:IBM PS2 Model P70 386 HMS.pdf]]
* [[IBM PS2 Model P70 386 Hardware Maintenance Reference]] &middot; [[IBM PS2 Model P70 Technical Reference (April 1989)]] &middot; [[IBM PS2 Model P70 HITR Supplement]]


[[Category:IBM Service Manuals]]
[[Category:IBM Service Manuals]]
[[Category:Service Manuals]]

Revision as of 00:17, 25 September 2026

The IBM PS/2 Model P70 386 Hardware Maintenance Service is IBM's 33-page service pamphlet for the PS/2 Model P70 386 (8573). Part number 15F2198, form number S15F-2198-00, First Edition (March 1990). It is the fault-isolation half of the pair; the Hardware Maintenance Reference is the removals-and-locations half.

What it contains

  • 1.0 General Checkout and 2.0 Installed Devices List — automatic configuration, device types, SCSI and non-SCSI devices.
  • 3.0 Undetermined Problem — IBM's isolation-by-removal sequence.
  • 4.0 Power Supply Voltages — the connector-pin measurements for this chassis.
  • 5.0 Enable and Disable Settings, 6.0 External Display Self-Test, 7.0 Display Adapter 8514/A, 8.0 Keyboard, 9.0 Printer, 10.0 Memory.
  • 11.0 Symptom-to-FRU Index — the numeric POST codes and beep symptoms mapped to FRUs.
  • 12.0 How To Use This Parts Catalog (with a worked example) and 13.0 Parts.

What it does not contain

Module level only. IBM serviced these machines by field-replaceable-unit exchange, and this pamphlet reflects that: it names FRU part numbers, not component values. There is no capacitor list, no resistor list, no semiconductor list and no schematic anywhere in it. The power supply, the planar and each drive are single line items in the parts catalogue. This is why no IBM machine checked in this wiki's verification drive has a published component-level capacitor list — it is not that the manuals were lost, it is that IBM never wrote one.

It is also not a standalone book. IBM issued it as a pamphlet to be filed in a binder alongside the general-purpose IBM Personal System/2 Hardware Maintenance Reference (part number 15F2190, form number S15F-2190-00) and Hardware Maintenance Service (part number 15F2200, form number S15F-2200-00), which carry the safety information, the general checkout procedure and the option and adapter sections. Those two general volumes are not hosted here.

Download it here: IBM PS2 Model P70 386 HMS.pdf

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