AT&T PC 6300 - Page 479

MAINTENANCE
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13. Record the error message and turn the power switch OFF.
14. Using the recorded error message and the tables shown in
Figures 5-34 and 5-35, determine the module that generated
the failure and replace that module.
ERROR NO.
PROBABLE CAUSE
MODULE
901 Drive Ready Test Failed
1. HDU Cables
2. HDU Controller
3. HDU*
902
Controller Self-Diagnostic
Failed
HDU Controller
903
Controller RAM Test Failed
HDU Controller
904
Drive Self-Diagnostics
Failed
HDU*
905
Surface Verify Test Failed
HDU*
906
Test Cylinder Write/Read
Tests Failed
1. HDU Controller
2. HDU*
907
Seek Test Failed
1. HDU Controller
2. HDU*
* If the HDUs available disk space is less than the nominal value
(10 MBs for 10 Meg HDUs and 20 MBs for 20 Meg HDUs),
it should be replaced.
Figure 5-34. HDU Troubleshooting Chart (Sheet 1 of 2)
5-101
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