Table Of Contents - IBM System 9000 Troubleshooting And Servicing

CONTENTS
SAFETY PRACTICES
1 . 0 Introduction
2 . 0 Fault Detection
2 . 1
Scope
2 . 2 Computer Startup
2 . 3
Automatic D iagnostic Testing
Keyboard Problems
2 . 4
2 . 5 Keypad and Softkey Problems
2 . 6 Printer/Plotter Control Problems
2 . 7
CRT Display Problems
2 . 8
Diskette Problems
2 . 8 . 1
Mechanical Faults
2 . 8 . 2
Failure To Function
2 . 9
Hard Disk Problems
2 . 9 . 1
Mechanical Faults
2 . 9 . 2
Failure To Function
2 . 10
Printer/Plotter Problems
2 . 1 1
Sensor I / O Problems
2 . 1 2 D igital Input/ Output Problems
3 . 0 Optional D iagnostic , Voltage, And Resistance Checks
3 . 1
Purpose . . . . .
3 . 2 Power Cord Check
3 . 3
Power Switch Check
3 . 4 Vertical Board Check
3 . 5 Power Supp ly Check
3 . 6
Keyboard Checks
3 . 6 . 1 Keyboard
3 . 6 . 2
Voltage Check
3 . 7
Keypad And Softkey Checks
Keypad and Softkey Echo Test - - Test 1 9
3 . 7 . 1
3 . 7 . 2 Softkey Resistance Check
3 . 8
Diskette and Disk Checks
81 1 Diskette and Diskette Drive Tests - - Tests 17 and
3 . 8 . 1
20 - 2 3
. . . .
Hard Disk and Hard Disk Controller Board Tests -- Tests
3 . 8 . 2
40 - 4 3 and 13
5 - 1/4C" Diskette and Diskette Drive Tests - - Tests 17
3 . 8 . 3
and 2 0 - 2 3
. . . . . . . . . . . .
CRT Controller Test - - Test 16
3 . 9
Sensor I / O Board Test - - Test 3 5
3 . 1 0
. . . . .
Echo Test -- Test
l A
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ix
1 - 1
2 - 1
2 - 1
2 - 1
2 - 8
2 - 1 0
2 - 1 1
2 - 1 1
2 - 1 3
2 - 15
2 - 16
2 - 17
2 - 18
2 - 18
2 - 20
2 - 2 1
2 - 23
2 - 23
3 - 1
3 - 1
3 - 1
3 - 2
3 - 3
3 - 5
3 - 7
3 - 7
3 - 9
3 - 10
3 - 1 0
3 - 1 2
3 - 1 3
3 - 13
3 - 14
3 - 1 5
3 - 16
3 - 1 7
iv