
MAP 0540: Switch Function
055 (continued)
Are there still problems reported on all data cables connected to this switch assembly?
Yes No
056
Clock problem resolved for this switch assembly.
– Go to Step 100 on page 1-350
057
Problem with switch planar.
– Go to Step 094 on page 1-349 to replace switch assembly.
058
– Go to Step 060.
059
– Go to Step 065 on page 1-344.
060
Probable problem with original external clock source.
– Based on the original external clock selection, locate the frame which was sourcing the switch clock.
Locate a “test” processor node in this frame which can be used for service.
– Disconnect the switch data cable for this processor node at the tailgate of the switch assembly.
– Using switch cabling list, locate the switch data cable (S00-BH-J3, S00-BH-J5, S00-BH-J7, or
S00-BH-J9) at the processor node frame that sources the clock to the failing switch assembly. Discon-
nect this cable at the tailgate of the processor node frame, then connect the end of the processor node
data cable to the jack.
– 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 (such as “External clock”) is one of the failing components.
Do the “css0” diagnostics fail with an indication of a clock problem?
Yes No
061
Problem is either cable or reported switch assembly.
– Replace switch data cable that originally supplied the switch clock to the failing switch assembly.
– Set the switch clock selection on this switch assembly to the original (correct) setting.
– From the control workstation of the primary node, enter:
Estart
to reinitialize the switch.
– Check the /var/adm/SPlogs/css/out.top file to see if problems are still reported on all data
cables connected to this switch assembly.
(Step 061 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-343
Содержание RS/6000 SP
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