CI750 Field Maintenance Print Set

This document is a comprehensive "Field Maintenance Print Set" (MP 01647) published by Digital Equipment Corporation, copyrighted 1983-1984. It provides detailed technical documentation for the C1750 system, encompassing its overall assembly, various subsystems, and individual components.

The print set is organized with an extensive Table of Contents spanning multiple pages, outlining hundreds of individual drawings, parts lists, and diagrams. Key areas covered include:

• Overall C1750 Assembly: Unit assembly details, interconnect diagrams, dual IC diagrams, and block diagrams, accompanied by comprehensive parts lists.
• Physical Enclosures: Extensive documentation for H9544 series components such as shielded front and rear doors, shielding inserts, add-on cabinet kits, and top covers, including assembly drawings and their respective parts lists.
• Cabling Systems: Detailed information on various power cables, sensor cables, DC to fan cables, cable retractors, CIPA harness assemblies, bulkhead cables (C1780), and complete cable sets.

• Core Subsystems: Dedicated sections provide in-depth documentation for:

  • CCI (Control Channel Interface): Unit assembly, schematics, block diagrams, and timing/state transition diagrams.
  • CDP (Control Data Processor): Unit assembly, schematics, block diagrams, timing/state transition diagrams, and detailed data path diagrams.
  • IPB (Packet Buffer): Unit assembly, schematics, block diagrams, timing diagrams, and control store details.
  • ILi (Link Interface): Unit assembly, schematics, block diagrams, timing diagrams, CRC (Cyclic Redundancy Check) circuits, and receiver/transmitter logic.

• Other Key Components: Documentation for card cage assemblies, power supply assemblies (877-B and H72020), air flow sensors, and star coupler assemblies (SC008 and 4-node modules), including their parts lists and schematics.

This extensive print set serves as a vital resource for field engineers and technicians working with the C1750 system, providing granular detail on its construction, functionality, and repair.