VAX-11/750 H7104 Power System Technical Description

Part	Date	Title
EK-PS750-TD-001	1980-11	VAX-11/750 H7104 Power System Technical Description
EK-PS750-TD-002	1981-01	VAX-11/750 H7104 Power System Technical Description

Table of Contents (from EK-PS750-TD-002)

Chapter 1 Introduction
- 1.1 Purpose
- 1.2 General Description of H7104 Power System
  - 1.2.1 Configuration
  - 1.2.2 Function
  - 1.2.3 Controls and Indicators
- 1.3 Related Documentation
  - 1.3.1 Field Maintenance Print Set
  - 1.3.2 VAX-11/750 Technical Descriptions
Chapter 2 Power System Specifications and Operating Instructions
- 2.1 H7104A, B Power Systems
  - 2.1.1 875A, B Power Controller Assemblies
  - 2.1.2 H7104C +2.5 V Power Supply Assembly
  - 2.1.3 H7104D +5 V Power Supply Assembly
- 2.2 Operating Instructions
  - 2.2.1 Turn-On Procedure
  - 2.2.2 Turn-Off Procedure
Chapter 3 Mechanical Configuration and Cabling
- 3.1 Mechanical Configuration
  - 3.1.1 H7104C +2.5 V Power Supply Assembly
  - 3.1.2 H7104D +5 V Power Supply Assembly
  - 3.1.3 875A, B Power Controller Assemblies
- 3.2 Cabling
  - 3.2.1 AC Power Distribution
  - 3.2.2 DC Power Distribution
    - 3.2.2.1 DC Power Distribution to CPU Backplane
    - 3.2.2.2 DC Power Distribution to UNIBUS Option
  - 3.2.3 Airflow Sense
  - 3.2.4 Temperature Sense
  - 3.2.5 Distribution of Power Supply Bias Voltages
  - 3.2.6 Control Signal Distribution
  - 3.2.7 Status Display Signals
  - 3.2.8 Battery Backup Unit Cabling
  - 3.2.9 Grounding
Chapter 4 Functional Theory of Operation
- 4.1 H7104 Power System
- 4.2 AC Power Distribution and Control
- 4.3 AC Input, Raw DC, and H7104 Bias Voltage Power Supply
  - 4.3.1 AC Input and Raw DC Sections
  - 4.3.2 H7104 Bias Voltage Power Supply
- 4.4 +5 V Power Supply
  - 4.4.1 Regulation of +5 V, 10 to 135 A Output
  - 4.4.2 +5 V Overvoltage Protection
  - 4.4.3 +5 V Overcurrent Protection
  - 4.4.4 Low Level AC Input Protection
  - 4.4.5 +5 V Monitor Circuits
- 4.5 ±15 V Regulator
  - 4.5.1 Regulation of +15 V, 0.2 to 2 A Output
  - 4.5.2 Regulation of -15 V, 0.35 to 3.5 A Output
  - 4.5.3 ±15 V Regulators Overcurrent Protection
  - 4.5.4 ±15 V Regulators Overvoltage Protection
  - 4.5.5 ±15 V Regulators Monitor Circuits
- 4.6 AC Input, Raw DC, and +2.5 V Power Supply
  - 4.6.1 AC Input and Raw DC Sections
  - 4.6.2 +2.5 V Power Supply
    - 4.6.2.1 Regulation of +2.5 V, 8.5 to 85 A Output
    - 4.6.2.2 +2.5 V Overvoltage Protection
    - 4.6.2.3 +2.5 V Overcurrent Protection
    - 4.6.2.4 Low Level AC Input Protection
    - 4.6.2.5 +2.5 V Monitor Circuits
- 4.7 ±5 VB Regulators
  - 4.7.1 Regulation of +5 VB, 2 to 20 A Output
  - 4.7.2 +5 VB Regulator Overcurrent Protection
  - 4.7.3 +5 VB Regulator Overvoltage Protection
  - 4.7.4 Regulation of -5 VB, 0 to 1.2 A Output
  - 4.7.5 -5 VB Regulator Overcurrent Protection
  - 4.7.6 -5 VB Regulator Overvoltage Protection
  - 4.7.7 ±5 VB Regulators Monitor Circuits
- 4.8 +12 VB Regulator
  - 4.8.1 Regulation of +12 VB, 1 to 10 A Output
  - 4.8.2 +12 VB Regulator Overcurrent Protection
  - 4.8.3 +12 VB Regulator Overvoltage Protection
  - 4.8.4 +12 VB Regulator Monitor Circuit
- 4.9 Fault Detect and Status Display
- 4.10 Time-of-Year Battery
- 4.11 Battery Backup Unit, H7112
  - 4.11.1 Battery Charger Functional Description
  - 4.11.2 Battery Power Source Functional Description
- 4.12 DC Power Distribution
Chapter 5 Fault Isolation Procedures and Removal and Replacement Instructions
- 5.1 Fault Isolation
- 5.2 Battery Backup Operational Verification
- 5.3 Removal and Replacement Instructions
  - 5.3.1 +5 V Power Supply Assembly Removal Procedure
  - 5.3.2 +5 V Power Supply Assembly Installation Procedure
  - 5.3.3 +2.5 V Power Supply Assembly Removal Procedure
  - 5.3.4 +2.5 V Power Supply Assembly Installation Procedure
  - 5.3.5 Power Controller Removal Procedure
  - 5.3.6 Power Controller Installation Procedure

Company:	Digital Equipment Corporation
Part:	EK-PS750-TD
Keywords:
Cited by:	EK-VAXV3-HB-001, VAX Maintenance Handbook, VAX-11/750

Address:	https://vt100.net/mirror/antonio/ps750td2.pdf
Site:	VT100.net
Format:	PDF
Size:	18785874 bytes (17.9 MiB)

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VAX-11/750 H7104 Power System Technical Description

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Table of Contents (from EK-PS750-TD-002)