IBM RS/6000 SP, Maintenance Information

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MAP 0540: Switch Function
061 (continued)
Are there still problems reported on all data cables connected to this switch assembly?
Yes No
062
Clock problem resolved for this switch assembly.
– Go to Step 100 on page 1-350
063
Clock problem isolated to reported switch assembly.
– Go to Step 055 on page 1-342
064
Problem with switch clock source switch assembly.
– Replace clock card in the clock source switch assembly. Make sure to reconnect all cables connected to
the clock card.
– Set the switch clock selection on this switch assembly to the original (correct) setting.
– Go to Step 055 on page 1-342 to service the clock source switch assembly.
065
– Check the ground strap(s) connected to the “problem” frame(s). Ground strap(s) are connected at bolts
near the cable escapes inside the bottom rear of each frame. Refer to “RS/6000 SP Installation
Instructions”, in
IBM RS/6000 SP: Maintenance Information Volume 1, Installation and Relocation, for a
view of a ground strap connection.
Do all ground strap(s) connecting the frames make adequate contact at both ends?
Yes No
066
– Fix or replace ground strap between the frames.
– Go to Step 101 on page 1-350 to verify fix.
067
– Determine whether this is an HiPS 2.0 or HiPS 3.0 switch assembly. An HiPS 3.0 switch assembly has
no connectors at HPS-BH-J35 and HPS-BH-J36.
Is this an HiPS 3.0 switch assembly?
Yes No
068
This is an HiPS 2.0 switch assembly; therefore, we need to check data cable interposer con-
nections. External clock sources 1, 2, and 3 correspond to top (S00-BH-J361), middle
(S00-BH-362), and bottom (S00-BH-J363) connections at S00-BH-J36, respectively.
– Either visually or by referencing Appendix A in
IBM RS/6000 SP: Maintenance Information
Volume 1, determine which bulkhead jack, S00-BH-J3, S00-BH-J5, S00-BH-J7, or S00-BH-J9,
corresponds to the data cable interposer of the selected clock.
– Go to Step 070 on page 1-345.
069
(Step 069 continues)
1-344
RS/6000 SP MAPs