IBM pSeries 670, Service Manual

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8. Use the torque wrench (supplied with the system tool kit, see “Tools” on page 962 for the tool part
number) to tighten the actuation bolt. When the wrench clicks, followed by about 15 degrees of free
motion, the bolt is seated.
9. If you are installing MCMs with the copper heatsink, remove the two steel alignment rods and tighten
the two captive heatsink bushing screws with a 5 mm socket wrench.
Attention: Do not over-torque the bolt.
Check the MCM/L3 short-circuit test tool to ensure that short circuit was not created when the MCM
was installed.
If this is the last MCM you are installing, remove the MCM/L3 module short-circuit test tool and meter.
10. Begin the above procedure again until all MCM modules have been replaced.
Note: Remove and install the MCMs with the copper heatsink one at a time, completing the above
substeps before servicing another MCM.
11. Remove the primary I/O book (see “I/O Books and I/O Blanks” on page 792) and replace the VPD
card that was provided with the MCM module.
L3
CUoD
12. Replace the primary I/O book.
13. Replace the DCAs and DCA fillers that you removed earlier. See “Processor Subsystem DCA
(Distributed Converter Assembly) Books and DCA Blanks” on page 797.
14. Replace the fan chassis. See “Fan Chassis” on page 849.
15. If an MCM or L3 cache module was just added or replaced, go to the service processor menu and
select System Information Menu, then select MCM/L3 Interposer Plug Count Menu.
If the MCM/L3 Interposer Plug Count Menu is not available, the system firmware level is too old, and
the MCM plug count must be recorded as described in “Installing the MCM/L3/Passthrough Plug Map”
on page 791 and “Using this Label” on page 791.
You can also upgrade the system firmware to the latest level to make the MCM/L3 Interposer Plug
Count Menu available, then continue with 16.
16. Find the index number that corresponds to the module that was just added or replaced and enter the
new plug count that was included in the FRU or MES kit. If the plug count is not included with the
FRU, enter the number 7 as the new plug count to account for the number of times the module was
plugged during the manufacturing process. If the MCM/L3 was replaced from field spares, enter the
Chapter 9. Removal and Replacement Procedures
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