MAP 0540: Switch Function
069 (continued)
This is an HiPS 3.0 assembly.
– The switch clock selected for this frame is from one of the following sources (with corresponding switch
data cables):
Internal
:
No cable
External 1 :
Sðð-BH-J3
External 2 :
Sðð-BH-J5
External 3 :
Sðð-BH-J7
– Go to Step 070
070
– Disconnect clock source data cable at S00-BH-J3, J5, J7, or J9, then reconnect to switch assembly.
(This is done to eliminate clocking noise from cable.)
– Find a processor node in the “problem” frame which is usable for service. This will be used as the “test”
processor node.
– Run advanced diagnostics on “css0” on the “test” processor node. Do not perform cable wrap test. Ref-
erence "Running Diagnostics in a Processor Node" in
IBM RS/6000 SP: Maintenance Information,
Volume 3, Locations and Service Procedures, as required.
– Look for an SRN indicating a clock problem, i.e. “External clock” is one of the failing components.
Note: Do not exit from diagnostics at this time, as it may be used in the following steps.
Do the “css0” diagnostics fail with indication of a clock problem?
Yes No
071
Diagnostics did not fail with indication of a clock problem.
Is this the first time at this step?
Yes No
072
– Go to Step 101 on page 1-350 to verify the fix.
073
– Disconnect the switch data cable corresponding to the selected clock at the switch assembly.
– Run advanced diagnostics on “css0” on the “test” processor node. Do not perform cable wrap
test. Reference "Running Diagnostics in a Processor Node" in
IBM RS/6000 SP: Maintenance
Information, Volume 3, Locations and Service Procedures, as required.
– Look for an SRN indicating a clock problem, i.e., “External clock” is one of the failing components.
Note: Do not exit from diagnostics at this time, as it will be used in the following steps.
Do the “css0” diagnostics fail with indication of a clock problem?
Yes No
074
Problem is the clock selection in this switch assembly.
– Replace the clock card in this switch assembly. Make sure to connect all cables connected
to the clock card.
– Reinstall only the two switch data cables which are not selected and the switch data cable
to the “test” processor node. Do not connect the remaining switch data cables at this time.
(Step 074 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-345
Содержание RS/6000 SP
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