Installing The Mcm/L3/Passthrough Plug Map; Processor Subsystem - IBM pSeries 670 Service Manual

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This section contains the removal and replacement procedures for the processor subsystem. Handle all

processor subsystem FRUs with extreme care.

Installing the MCM/L3/Passthrough Plug Map

If the MCM/L3/Passthrough Plug Map is not installed in the system, install it before continuing with any

repair action for MCMs or L3 cache module.

With the front cover open, locate the right frame extender (located on the opposite side of the UEPO

switch). The 50 mm (approximately 2 inch) wide label should be installed vertically, along this extender,

approximately in line with EIA frame positions 22 - 28.

The trifold label has two hook-and-loop fastener strips attached to the back. Remove the adhesive backing

from the hook-and-loop fastener and attach it to the frame extender. A small piece of hook-and-loop

fastener is used to help keep it folded while attached to the frame. The label appears similar to the

Using this Label

Whenever an MCM/Passthrough module is added or replaced/reseated during a repair action, a sticker

with the module's serial number is provided for use with the plug map label according to its plugging

location. If serial number label is not available, then record the serial number of the MCM/Passthrough

module is added, reseated, or replaced along with the number of times plugged. This module is then

allowed three plugs with each plug recorded on label. If the module should need to be removed and

reinstalled a fourth time, it must be replaced.

The process is similar for the L3 module, except a separate serial number label is not provided, instead

the serial number is located on a sticker attached to the L3 heatsink. Record the serial number of the L3

modules added, replaced, and reseated along with the number of times plugged. If the module should

need to be removed and reinstalled a fourth time, it must be replaced.

Chapter 9. Removal and Replacement Procedures

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