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D2246
Maintenance manual
NEC D2246 Maintenance Manual
8-inch winchester disk drive
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Contents
Table of Contents
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Table of Contents
Table of Contents
Chapter 4 Removal and Replacement Procedures
G9QST (Logic and Servo) PCB Removal
G9QSN (Read/Write) PCB Removal
Earth Pad Assembly Removal
G9QSQ (Power Amplifier) PCB Removal
Motor Stator Assembly Removal
Chapter 5 Adjustments
Required Tools
Servo Offset Adjustment
Seek Speed Adjustment
Chapter 6 Illustrated Parts Breakdown
Chapter 7 DKUOOO-H3PM 3-Input DC Regulator Option
General Description
Interface Requirements
DC Power Connector (P4)
Signal Ground Terminal
DC Power Input Requirements
Installing the 3-Input DC Power Regulator
Chapter 8 DKU-HDPI Dual-Port Interface Option
General Description
Switches and Indicators
Port a (Route 0) Switches and Indicators
Port B (Route 1) Switches and Indicators
Drive Selection
Interface
Status Commands
Release Command
Priority Select
Installing the Dual-Port Interface
Appendix a Schematic Diagrams
Signal Tracing Scheme
A-I
Drawings
Appendix B Specifications
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D2246 8-INCH
WINCHESTER DISK DRIVE
MAINTENANCE GUIDE
NEe
NEe Information Systems, Inc.
819-000080-5001 Rev. 00
12-83
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