Service manual

Contents
About This Manual ix
1 Testing
1.1 Running Power-Up Tests ............................ 2
1.1.1 Power-Up Test Codes ............................. 3
1.2 Running a Self-Test ................................ 5
1.2.1 Self-Test with Loopback Connectors . . . ............... 5
1.2.2 Self-Test Codes . . ................................ 6
1.3 Running System Exerciser Diagnostics . . ............... 6
1.3.1 System Exerciser Diagnostic Commands .............. 7
1.3.2 System Exerciser Codes . . . ........................ 7
2 Troubleshooting
2.1 Troubleshooting Procedures . . ........................ 9
2.2 TEST B — Memory (4 Mbyte DSIMM) . . ............... 9
2.2.1 Additional MEM Information ....................... 10
2.3 SCSI-A Troubleshooting ............................. 12
2.3.1 Running the System Exerciser ..................... 15
2.3.2 Power Connector Pinouts . . ........................ 16
3 Utilities
3.1 Diskette Formatter Utility . . . ........................ 20
3.1.1 Diskette Formatter Messages....................... 21
3.2 Special Diagnostic Key on Diskettes for Customer Service
System Exerciser . . ................................ 25
3.3 RX33 Formatting . . ................................ 27
3.4 Console Password Feature . . . ........................ 27
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