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PC 6300
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AT&T PC 6300 Service Manual
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:
User manual
(456 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
General
Introduction
Organization
Tools and Accessories
System Overview
Introduction
System Module
Motherboard
CPU and DMA Circuitry
Memory
Input/Output Peripheral Interfaces
Input/Output Connectors
Motherboard Component Layout
Display Controllers
Bus Converter
Input/Output (I/O) Expansion Bus Characteristics
Mini-Floppy Disk Unit(S)
Slim Hard Disk Units (Optional)
Hard Disk Unit Controllers (Optional)
Memory Expansion Board (Optional)
Power Supply
Display Enhancement Board (Optional)
Small Expansion Box (Optional)
Display
Monochrome Display
Color Display (Optional)
Keyboard
Display and Keyboard Extension Cables
Configuration
Configuration
Site Preparation
Environmental Requirements
Physical Characteristics
Unpacking
Option Installation
Removing System Module Covers
Removing Upper Cover
Removing Lower Cover
Upgrading Motherboard Memory to 256KB or
640Kb
Installing Memory Expansion Board
Upgrading Memory Expansion Board Memory to 384KB
Installing 8087 Numeric Data Processor
Replacing Mini-Floppy Disk Unit with Hard Disk Unit
Removing Upper MFD Unit
Replacing Mini-Floppy Disk Unit with Hard Disk
I I Installing 10- or 20-MB Hard Disk Units
Installing Hard Disk Controller Board
Setting DIP Switches and Jumpers
Installing Small Expansion Box
Installing the Display Enhancement Board
Installing DEB Software
Floppy Disk Systems
Hard Disk Systems
Troubleshooting the DEB Installation
Installing the Mouse
Installing the Ball in the Mouse
Connecting the Mouse to the Computer
Installing the Keyboard ROM
Opening the Keyboard
Removing Existing ROM Chip
Installing New ROM Chip
Installing the Mouse Software with the Dual Diskette Computer
Installing the Mouse Software
Installing Mouse Software with the Hard Disk Computer
System Installation
Applying Power to the System
Introduction
Resident Diagnostics
Operating Procedures
Test Descriptions
Error Messages
Diagnostics
Automatic Mode
Manual Mode
Test Descriptions
Motherboard Test
Memory Test
Keyboard Test
Video System Test
Parallel Port Test
Serial Port(S) Test
48 TPI Floppy Disk Test
HDU Drive and Controller Test
I Parallel Printer Test
8087 Math Co-Processor 4^41
Mouse Test
8087 Math Co-Processor
8530 Test
Video Option Board Test (DEB [Display Enhancement Board])
A 2Nd HDU Drive and Controller Test
Loading System Test
System Test Diagnostics
Operating Procedures
Test Descriptions
Motherboard Test
Memory Test
Keyboard Test
Video System Test
Parallel Port Test
Serial Port(S) Test (Using 8250)
48 TPI Floppy Disk Test
MB HDU Drive and Controller Test
8087 Math Co-Processor
Parallel Printer Test
Mouse Test
8530 Test
Video Option Board Test [Display Enhancement Board (DEB)]
2Nd HDU Drive and Controller Test
System Test Diagnostics (Overlay Version)
Loading System Test (Overlay Version)
Stand-Alone Motherboard Dma
Test Diagnostics
Dmatest
Stand-Alone Low-Level Format
Utility Test
General Characteristics
The Bad Track Table
List of Operations
Help
HDU Configuration
Low-Level Format
Display and Edit Bad Track Table
Format Bad Tracks
Verify Surface Test
Ship the Unit
Exit Low-Level Format (LLF) Utility
Customer and System Test Error Messages
100-Motherboard Tests
300-Memory Tests
400-Keyboard Tests
500-Video Tests
600-Parallel Port Tests
700-8250 Serial Port Tests
800-MFD Unit Tests
900-HDU Tests
Loxx-Parallel Printer Tests
18XX-8087-2 Numeric Co-Processor Tests
20XX-Mouse Tests
21XX-8530 Serial Port Tests
23XX-Video Option Board (DEB) Tests
24XX-HDU Drive No. 2 Tests
Maintenance
General
Troubleshooting
Replacing Faulty Modules
Reminders
Troubleshooting Without System Test
System will Not Power up Normally
System Load Check on Power Supply
Short Isolation Procedure
Display Check
Mini-Floppy Disk Unit Check
Two Mini-Floppy Disk Units
One MFD Unit and One HDU
System will Not Access Hard Disk '5-36
Hard Disk Problems
Problems that May Occur in a One/Two Hard Disk
Placing Low-Level Format and Bad Track Mapping on the Hard Disk
Partition Hard Disk for MS-DOS
Formatting the Hard Disk
Hard Disk Unit "Not Ready" on Cold Start
Resident Diagnostic Error Messages
Test
Motherboard
Parallel Port
Motherboard
Random Access Memory (RAM)
Determining Faulty RAM Chips
Keyboard
Video System
Parallel Port
Serial Port Test (Using 8250)
Mini-Floppy Disk Drive
Hard Disk Unit
Parallel Printer Test
8087-2 Math Co-Processor
Mouse
Mouse Test
8530 Serial Port Test
Video Option Board
Video Option Board Test
Second Hard Disk Unit
Test Description
Loading DMA Test
Loading DM a Test
Stand-Alone Motherboard Dma
Test Diagnostics
Operating Procedures
Troubleshooting with System
Power Supply Adjustment
Modules
Replacing Faulty Modules
Removing Upper System Module Cover
Removing Lower System Module Cover
Replacing Power Supply Unit
Replacing Fan
Replacing Motherboard
Replacing Bus Converter
Replacing Display Controller
Replacing Lower Mini-Floppy Disk Unit
Replacing Upper Mini-Floppy Disk Unit
Replacing Slim HDU
Replacing Memory Expansion Board
Replacing HDU Controller
Replacing Small Expansion Box (External HDU)
Replacing Memory Chips
Mouse Care and Cleaning
Cleaning Keyboard Contacts
Appendix A: Switches
Introduction
Jumpers
DIP Switch Setting
Switches
Jumpers
Motherboard
DIPSW-0 Settings
DIPSW-1 Settings
Hard Disk Controllers
Hdus Supported
Display Controller Board
Display Controller Jumpers
Video Disable Option
P4 Display Controller Board
P8 Display Controller Board
Display Enhancement Board Jumpers
Mini-Floppy Disk Units
Resistor Pack or Terminating Resistor
Toshiba Mini-Floppy Disk Unit
OPE Mini-Floppy Disk Unit
Matsushita Mini-Floppy Disk Unit
Hard Disk Unit
Jumper and Switch Setting
At&T Pc 6300 Acceptance
Appendix B: Field
Field Replaceable
Modules
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Quick Links
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Cpu and Dma Circuitry
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See also:
User Manual
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PERSONAL COMPUTERS
PC 6300
T231
Service Manual
AT&T
Information Systems
SERVICES DIVISION EDUCATION
- - v.i
Table of
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Table of Contents
Troubleshooting
Troubleshooting the DEB Installation
185
GENERAL
383
TROUBLESHOOTING WITHOUT SYSTEM TEST
385
TROUBLESHOOTING WITH SYSTEM
432
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