AT&T 3B2 Maintenance Reference Manual page 5

Disk Partition Information
5-4
Trouble Analysis
5-5
Troubleshooting Charts
5-5
System Will Not Power-up
5-17
LED Announced Sanity Failures
5-17
Error Messages
5-18
Hard Disk Problems (Models 300/310 Only)
5-19
Software Troubleshooting
5-21
File System Checks
5-21
Restoring Core UNIX System
5-22
Crash Dumps
5-23
Restoration of Firmware Passwords
5-25
General Troubleshooting Techniques
5-26
Troubleshooting Techniques for Peripherals
5-28
Terminals and Modems
5-28
Printers
5-28
382 Subassemblies
Introduction
6-1
Version 2
6-2
Removing the Cover
6-2
Power Supply
6-3
Floppy Disk
6-
7
Cartridge Tape Drive (23 MB)
6-7
Cartridge Tape Drive (60 MB)
6-8
Hard Disk
6-8
II
0 Backplane
6-14
Memory Boards
6-18
System Board
6-19
Battery
6-26
Version 3
6-27
System Board
6-28
SCSI Host Adapter Board Removal 6-30
I/0
Feature Cards
6-31
Memory Boards
6-32
Microbus (uBus) Boards
6-33
Buffered Microbus (BuBus) Boards
6-34
Processor Bus (PBus) Boards 6-35
Removing the Cover
6-36
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