Digital Equipment DEC 3000 600 AXP, Service Information

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SCC Diagnostic
Examples The next example runs the SCC diagnostic.
>>> T SCC
Return
The next example runs the SCC diagnostic and the LK401
subtest.
>>> T SCC LK401
Return
Error Reporting The diagnostic reports any error that it finds. Error messages
include a hexadecimal longword of data and a FRU code to
identify the failing FRU.
>>> T SCC
?? 003 SCC xxxxxxxx
Table 9–17 lists the SCC diagnostic error messages and which
FRU to replace.
Table 9–17 SCC Error Identification
Test Failure
Code FRU
Code
Failing Test Error Code Replace...
?? 002 SCC See Chapter 14 I/O
Module
?? 003 SCC See Chapter 14 Keyboard
?? 004 SCC See Chapter 14 Mouse
ISDN Diagnostic
Overview The ISDN diagnostic ensures that the 79C30A chip is fully
functional by testing, generating, verifying, and disable
interrupting the following:
• 79C30A Internal registers
• Internal digital loopback
• Internal analog loopback
9–22