Table of Contents
Advertisement
7901A
Figure
1-l.
1-2.
2-l.
2-2.
2-3.
2-4.
2-5.
2-6.
3-l.
4-l.
4-2.
4-3.
5-l.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
5-8.
5-9.
5-10.
5-1l.
5-12.
5-13.
5-14.
5-15.
5-16.
5-17.
5-18.
5-19.
5-20.
5-2l.
5-22.
5-23.
5-24.
5-25.
5-26.
5-27.
5-28.
5-29.
5-30.
5-3l.
5-32.
5-33.
5-34.
5-35.
5-36.
5-37.
5-38.
5-39.
5-40.
5-4l.
5-42.
5-43.
Hewlett-Packard 7901A Disc Drive
Identification Sticker . . . . . . .
Power Supply Strapping Diagrams
Disc Drive Cabinet Mounting ..
Chassis Slide Attachment . . . .
Rack Mount Bracket Attachment
Disc Drive Slide Attachment ..
Disc Drive to RETMA Attachment
Disc Drive Front and Rear Panel Features
Disc Drive Overview
. . . . . .
Disc Drive Addressing Structure
Disc Drive, Block Diagram
Prepared Head Cleaning Tool
Encoder Plate Adjustments
Encoder Adjustment. . . .
Title
Encoder Parallelism Adjustment Waveforms
Encoder Parallelism Adjustments
Encoder Alignment Waveform
Carriage Detent . . . . . . .
Head Alignment
. . . . . . .
Head Alignment Waveforms
Sector Circumferential Waveform
7901A Turn-On Interlock Functional Sequence
Disc Drive Chassis Mounted Components
Disc Drive Chassis, Wiring Diagram . . . . . . .
Disc Drive PC Assembly Locations . . . . . . .
Indicator PC Assembly A1, Parts Location Diagram
Indicator PC Assembly A1, Schematic Diagram
Sector Transducer PC Assembly A2, Parts Location Diagram
Sector Transducer PC Assembly A2, Schematic Diagram
Motor Control PC Assembly A3, Parts Location Diagram
Motor Control PC Assembly A3, Schematic Diagram . . .
Servo Amplifier/Regulator PC Assembly A4, Parts Location Diagram
ILLUSTRATIONS
Page
.1-0
.1-1
.2-2
.2-3
.2-4
.2-5
.2-6
.2-6
.3-2
.4-1
.4-3
4-11
.5-4
.5-7
.5-8
.5-9
.5-9
5-10
5-10
5-11
5-12
5-12
5-14
5-17
5-17
5-18
5-19
5-19
5-21
5-21
5-23
5-23
5-27
Disc Drive Power Supply and Servo Amplifier/Regulator PC Assembly A4,
Schematic Diagram . . . . . . . . . . . . . . . . . .
Motherboard PC Assembly A5, Parts Location Diagram
. . . . . . . . .
Motherboard PC Assembly A5, Schematic Diagram
. . . . . . . . .
Write Driver/Read Preamplifier PC Assembly A6, Parts Location Diagram
Write Driver/Read Preamplifier PC Assembly A6, Schematic Diagram
Read/Write Control PC Assembly A 7, Parts Location Diagram
Read/Write Control PC Assembly A 7, Schematic Diagram
Auxiliary Function PC Assembly A8, Schematic Diagram
Encoder PC Assembly A9, Parts Location Diagram . . . .
Encoder PC Assembly A9, Schematic Diagram . . . . . .
Drive Control PC Assembly A10, Parts Location Diagram
Drive Control PC Assembly A10, Schematic Diagram
Sector Cylinder PC Assembly All, Parts Location Diagram
Sector Cylinder PC Assembly All, Schematic Diagram
I/O Multiplex PC Assembly A12, Parts Location Diagram
I/O Multiplex PC Assembly A12, Schematic Diagram
I/O Interconnect PC Assembly A13/A14, Schematic Diagram
Termination PC Assembly A16, Parts Location Diagram .. .
Termination PC Assembly A16, Schematic Diagram
. . . . .
Unit Select Switching Assembly A17, Parts Location Diagram
Unit Select Switching Assembly A17, Schematic Diagram
Integrated Circuit Pin Layouts . . . . . . . . . . . . . . . .
5-27
5-29
5-29
5-33
5-33
5-35
5-35
5-37
5-41
5-41
5-45
5-45
5-49
5-49
5-51
5-51
5-53
5-55
5-55
5-57
5-57
5-59
v
Advertisement
Table of Contents
