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HP 7936
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HP 7936 Support Manual
Disc drives
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Chapter 1
Product Information
Introduction
Product Description
Documentation Supplied
Supporting Documentation
Product Structure
Specifications
Serial Number
Supported Equipment
Test Equipment Required
Warranty
Support Strategy
Chapter 2
Site Planning and Requirements
Introduction
Site Planning
Specifications
Cabling Limitations
Chapter 3
Installation and Configuration
Introduction
Shipping Latch
Drive Installation
Primary Power Requirements
Controls, Indicators, and Connectors
Line- Switch
Channel Address/Diagnostic Switch
Run Time Mode
Diagnostic Mode
LED Display
HP-IB Connector
Power Fuse
Line Connector
CPU Connection - HP-IB Systems
HP-IB Cabling
HP-IB Device Address
Chapter 4
Preventive Maintenance
Introduction
Chapter 5 Page
Functional Description
Introduction
Block Diagrams
Signal Notation
List of Mnemonics
Disc Format
Addressing Structure
Addressing Mode
Disc Sparing
Sector Sparing
Track Sparing
Controller PCA-A6
Servo System
Head-Disc Assembly A3
Dedicated Servo Code
Sampled Servo Code
Servo Head
Servo Read Preamplifier/Write Driver IC
Drive ID Circuit
Head Gain Reference PROM and DAC
Actuator
Speed Sensor
Read/Write PCA-A2
Dedicated Servo AGC Amplifier
Sampled Servo Switch
Sampled Servo AGC Amplifier
Servo PCA-Al
Servo Controller
2-Bit ADC
Dedicated Servo AGC Circuit
Sampled Servo AGC Circuit
Sector Mark Decoder
Dedicated Servo Circuit
Sampled Servo Circuit
Sampled/Dedicated Select Switch
Slew Rate Limiter
Slew Rate Limit Switch
Off-Track Detector
Track Crossing Detector
Fault Latches
Servo Power Amplifier
Amplifier Error Detection
Servo System Errors
Track Follower - PLL Errors
Seek Errors
Power Amplifier Error
Flowcharts
Read/Write System
Head-Disc Assembly A3
Recording Medil.lm
Read Preamplifier/Write Driver Ics
Read/Write PCA-A2
Head Select Encoder
Read Chain
Write Chain
Error Reporting
Spindle Drive System
AC Input
Spindle Motor BI
Primary Power PCA-A8
LINE- Switch
Start Capacitor and Relay
Brake Voltage Source
Speed Sensor
Servo PCA-/\1
Read/Write PCA-A2
Power Distribution PCA-A5
Power Sl.lpply System
AC Input Circuit
Primary Power PCA-A8
Power Supply PCA-A4
Primary Power Selection
Primary Control Circuit
Output Section
Fault Detection and Protection
Power Distribution PCA-A5
Read/Write PCA-A2
Servo PCA-,I\']
LED Display
HDA Air Filtration
Recirculating Filter
Breather Filter
Chemical Filter and Desiccant Chamber
Drive Air Flow
Chapter 6
Removal and Replacement
Introduction
Tools Required
Illustrations
Drive Preparation for Service
Rear Cover
HP-IB Assembly
Front Panel
Front Cover
EPROM Kit, Controller PCA-A6
Servo PCA-A I
Power Distribution PCA-A5
Drive Belt, Motor Pulley
Power Supply PCA-A4
Start Capacitor Cl
Head-Disc Assembly A3
Chapter 7
Adjustments
Introduction
Chapter 8 Troubleshooting and Diagnostics
Safety Considerations
Troubleshooting Strategy
Diagnostic Switch
Diagnostic Mode
CS/80 External Exerciser
Error Logs
Fault Log
Error Codes
Terrors
Derrors
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HEWLETT-PACKARD
liP 7936 AND HP 7937 DISC DRIVES
HARDWARE SUPPORT MANUAL
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