Libretto 50CT/70CT Maintenance Manual
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Table of Contents
Chapter 1
Hardware Overview
1.1
Features
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1-1
1.2
System Unit Block Diagram
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1-4
1.3
3.5-inch External FDD (Option)
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1-7
1.4
2.5-inch HDD
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1-8
1.5
Keyboard
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1-9
1.6
LCD Panel
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1-10
1.7
Power Supply
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1-12
1.8
Batteries
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1-13
Chapter 2
Troubleshooting Procedures
2.1
Troubleshooting Overview
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2-1
2.2
Troubleshooting Flowchart
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2-2
2.3
Power Supply Troubleshooting
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2-5
2.4
System Board Troubleshooting
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2-10
2.5
Floppy Disk Drive (FDD) Troubleshooting
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2-17
2.6
Hard Disk Drive (HDD) Troubleshooting
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2-19
2.7
Keyboard Troubleshooting
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2-23
2.8
Pointing Device Troubleshooting
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2-24
2.9
Display Troubleshooting
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2-25
Chapter 3
Tests and Diagnostics
3.1
The Diagnostic Test
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3-1
3.2
Executing the Diagnostic Test
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3-3
3.3
Subtest Names
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3-7
3.4
System Test
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3-9
3.5
Memory Test
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3-10
3.6
Keyboard Test
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3-12
3.7
Display Test
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3-14
3.8
Floppy Disk Test
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3-17
3.9
Printer Test
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3-20