Data General NOVA ECLIPSE 6234 Service Manual page 8

Data General Corporation (DGC) has prepared this manual for use by DGC personnel and customers as a guide to the proper installation, operation, and
maintenance of DGC equipment and software. The drawings and specifications contained herein are the property of DGC and shall neither be reproduced in
whole or in part without DGC's prior written approval nor be implied to grant any license to make, use, or sell equipment manufactured in accordance herewith.
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LIST OF ILLUSTRATIONS
6234/6280 Disk Subsystem
6234 Controller PCB
Title
6234 Interconnection Diagram
6280 Controller PCB
6280 Interconnection Diagram
Front Panel ON/OFF Switch and Indicators
Unit Select and Write Protect Switches
6234/6280 Block Diagram
6234 Controller PCB Block Diagram
6280 Controller PCB Block Diagram
Sealed Data Module
Head Positioner
Sector Disk
Clean Air System
Read/Write and Clock PCB Block Diagram
6234/6280 Head Numbering
Power Supply Block Diagram
Sec tor Format
Sector Interleaving
R/W Sector Format
MFM Timing Diagram
UNIT SELEX:!T and WRITE PROTEX:!T Switches
Power Switch Wire Connections
Power Supply PCB LED Locations
Master Troubleshooting Flowchart for Model 6234/6280
Model 6234/6280 Interconnection Diagram
Fuse Check Flowchart
Cable and Power Identification
Power Supply PCB Connectors
Power Supply PCB Check Flowchart
Power Supply PCB Voltage Checks
AC Distribution PCB
Power Transformer Tl Connectors
Read/Write and Clock PCB Connectors
Transformer Check Flowchart
Voltage Checks on JS and J6 Power Supply PCB
Relay Check Troubleshooting Flowchart
AC Power Distribution PCB Mounted on Rear Cover
Spindle Motor Check Flowchart
Rigid Drive, Cover Removed
Read/Write and Clock PCB Troubleshooting Flowchart
Read/Write Clock PCB
Model 6234 Sample Error Report
Model 6280 Fault Indicator LED
Model 6280 Sample Error Report
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015-000133
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