IBM pSeries 670, Service Manual

Page: 822 / 1032

12. Ensure that the actuation bolt behind the MCM module is in the down position.
A A
Front
1 2 4 3 5 6 6 4 1 8
B
a
b
7 7 7
Right
Side Back
1 L3 Filler 5 System Clock Card
2 L3 Module Assembly 6 MCM Filler or Pass Through Card
3 MCM Locking Cam 7 System Board
4 MCM Heatsink / Module Assembly 8 Actuation Bolt
13. Use the torque wrench (part number 11P4486, supplied with the system tool kit) to loosen the
actuation bolt in the center of the MCM module. If installing a new MCM, remove the actuation bolt.
14. If installing a new MCM, insert the new actuation bolt supplied with the new MCM module.
15. Move the actuation bolt to the up position and hand-tighten to hold the assembly in the up position.
16. Hold the MCM module that you are removing with one hand. Use an 8-mm socket wrench (plastic
backplane stiffener) or 5-mm socket wrench (aluminum backplane stiffener) to unlatch the locking
cams.
17. If you are removing a MCM with the aluminum heatsink, go to substep 19 on page 803.
18. If you are removing a MCM with the copper heatsink, using the steel alignment rods, previously
installed, slide the MCM processors out and away from the system backplane.
Notes:
a. The steel alignment rods are used to relieve some of the weight of the MCM processor when
removing them from the processor drawer.
b. The field restocking plan, is to replace the 1.7 GHz copper heatsink MCM (factory installed) with a
1.7 GHz aluminum heatsink MCM.
802
Eserver
pSeries 670 Service Guide