RetroTechCollection

PDP-11/70 Documentation

PDP-11/70 Documentation covers two DEC documents for the PDP-11/70, with the PDF of each, and lists further material on bitsavers.

PDP-11/70 Maintenance and Installation Manual (EK-11070-MM-002)

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DEC's PDP-11/70 Maintenance and Installation Manual, second edition May 1979 (preliminary edition November 1975, first edition January 1977), 363 scanned pages without a text layer.[1]

Contents:[1]

  1. General description: configuration tables for the processor and the MJ11 and MK11 memory cabinets, related documents and drawings.
  2. Specifications: processor and memory electrical, power and heat, mechanical, environmental; RH70 peripherals; Unibus interface.
  3. Installation: site preparation, AC power checks, system checkout and bootstraps (M9301-YC, M9301-YH, M9312), MJ11 and MK11 memory expansion with voltage checks, add-on options.
  4. Power system (pp. 4-1 to 4-113): 861-D and 861-E power controls, DC power distribution and harnesses, the H7420 processor supplies with H744 and 5411086 regulators, the MJ11 and MK11 memory supplies, and maintenance, adjustment, fault isolation and removal procedures, including a regulator troubleshooting chart (Table 4-20) and bench test.
  5. Maintenance: troubleshooting guidelines and flowchart, dead-machine checks, toggle-in routines, cabling, registers, indicators and jumpers, maintenance cards, and the 11/70 diagnostics.

Appendices: module removal, IC replacement, configuration labels, IC descriptions, preventive maintenance schedule (E), equipment specifications (F), wire trough system (G), block diagram (H).

It does not contain module schematics or component values; those are in the maintenance print sets (MP-00822 for the KB11-C, MP-00823 for the KB11-B) and the regulator drawings.[2]

Download: PDP-11-70 Maintenance and Installation Manual (EK-11070-MM-002).pdf

1170 Maintenance Service Guide (KA-K1170-MG-003)

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A Field Service guide prepared by Bernie Leduc and Ed Smith of Digital Equipment of Canada's Canadian Product Support, version 3, reprinted April 1988; 224 pages with a text layer. Chapters: documentation list; diagnostics (order and switch settings); bootstraps; toggle-ins; field change orders and tech tips; regulator adjustments and test points (pp. 25 to 28); switches, jumpers and indicators; CPU; cache; memory management; Unibus map; RH70; MJ11; MK11; KY11-R; annual PM (pp. 125 to 130); cables; troubleshooting aids (memory margins, MJ11 tuning, CPU timing and voltage margins, crash and halt analysis for RSTS, RSX and Unix).[2]

Download: PDP-11-70 Maintenance Service Guide (KA-K1170-MG-003).pdf

Pages that cite these documents

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Other documents on bitsavers

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Bitsavers' PDP-11/70 directory holds the KB11-C processor manual (EK-KB11C-TM-001), the FP11-C manual and print set, the KY11-R console manuals, the MJ11 user's manual, MK11 print sets, the 1977-78 PDP-11/70 handbook and engineering drawings. The H744, H745 and H754 regulator drawings and parts breakdowns and the 861 power controller manual are in its power supply directory.[3]

References

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  1. ↑ 1.0 1.1 Digital Equipment Corporation, PDP-11/70 Maintenance and Installation Manual, EK-11070-MM-002, title, edition and contents pages. Source: bitsavers.org.
  2. ↑ 2.0 2.1 Digital Equipment of Canada, 1170 Maintenance Service Guide, KA-K1170-MG-003, cover, contents and documentation list (pp. 1 to 2). Source: bitsavers.org.
  3. ↑ Directory listings, bitsavers.org/pdf/dec/pdp11/1170/ and bitsavers.org/pdf/dec/powerSupply/, retrieved 2 October 2026.
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