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SER-BUS (Serial communication bus)
Issue 1 June 2005 1965
FAIL
(
cont’d)
4. Run list configuration power-supply C to determine if some
power supplies are still not showing and the Serial Bus fault is still
present.
5. If the fault is still present:
1. Check if the backplane pins in the removed circuit pack’s slot
appear to be bent.
2. If the backplane pins are not bent, reinsert the circuit pack(s), and
perform this Procedure 1 for the next set of circuit packs.
3. If the backplane pins are bent, remove power to the carrier by
unplugging the two AC cords on the back, and the one DC input
cord on the back, if there is one.
4. Straighten or replace the pins and reinsert the circuit pack.
5. Restore power and repeat Procedure 1, beginning with Step 2, for
the same circuit pack(s).
6. If the fault is not present:
1. Reinsert the circuit pack(s) one at a time, and repeat the following
substeps until all of the circuit packs have been reinserted.
2. Run list configuration power-supply C to determine if the
Serial Bus fault has returned.
3. If any of the power supplies don’t show, the reinserted circuit pack is
defective. Replace this circuit pack and repeat this procedure for the
next circuit pack.
4. If none of the power supplies fail to show when all of the circuit
packs have been reinserted, the problem has been fixed and the
procedure is completed.
Table 720: Test 1531 Serial bus status (continued)
Error
code
Test
result
Description and recommendation
3 of 5