HP 9845B/C CE Service Manual

Table of Contents
Specifications
Safety Considerations
Chapter 1: General Information
Introduction
........................................................................ 1-1
General Description
........................................ , ........................ 1-1
Service
Support Package ............................................................ 1-3
Options ............................................................................ 1-5
Equipment Supplied
................................................................. 1-5
Accessories Available
................................................................ 1-6
Installation
......................................................................... 1-7
Power Requirements
............................................................. 1-7
Fuses
........................................................................... 1-8
Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Self-Test
....................................................................... 1-10
9895A Installation Procedure
.................................................... 1-12
Flexible Disc
Use ................................................................... 1-14
Introduction
................................................................... 1-14
Disc Loading
................................................................... 1-14
Disc Handling Precautions
...................................................... 1-14
Write Protect
................................................................... 1-15
Operator Controls
.................................................................. 1-16
Reset Caused by Line Voltage Reduction
............................................. 1-16
Chapter 2: Theory of Operation
Introduction ........................................................................ 2-1
Controller Module Theory of Operation
............................................... 2-1
Introduction
..................................................................... 2-1
General Description
.............................................................. 2-1
Controller Interface to HP-IB(PHI Chip)
........... . ............................ 2-3
Processor
and Memory ........................................................... 2-3
Read Operation
................................................................. 2-4
Write Operation
............................................................. "0 ••• 2-4
Error Detection
.................................................................. 2-4
Seek Operation .................................................................. 2-5

HP 9845B/C CE Specifications

General

Brand	HP
Model	9845B/C CE
Category	Storage
Language	English