IBM iSeries 270 Service Manual page 68

j. After exchanging an item, go to Verify the repair.
This ends the procedure.
9. You are removing a processor card assembly (M03 or M04) in a Model 830/SB2 system unit. Refer to
Figure 2. in Final assembly, rear - Models 830 and SB2 with FC 9074 (See page 403), and perform
the following steps:
Attention: It is important that the area inside the processor drawer is free of dust build up. The
mating of the two surfaces is critical for the processor to function properly. Ensure that you have the
special brush that was supplied with the new processor and use it only when instructed to do so.
a. Inspect the inside of the processor drawer for dust particles. If dust is visible, then clean the area,
especially in and around the processors (do not use the special brush at this time). It is important
for this area to be clean and free of debris prior to continuing with the next step of this procedure.
b. Remove the screws from the processor air cover.
c. Remove the processor air cover from the drawer.
d. Inspect the inside of the processor drawer for dust particles. If dust is visible, then clean the area,
especially in and around the processors (do not use the special brush at this time). It is important
for this area to be clean and free of debris prior to continuing with the next step of this procedure.
e. Loosen and remove the 3/8" (9.5mm) hex head screw/spring assembly from the end of the
latching arm and pull the arm up until it rests against the sheet metal.
f. Grasp the center of the processor assembly and remove it by pulling straight up.
g. Lay the new processor and the processor that you just removed on their backs so that the contact
surface is facing up. Be very careful not to damage or contaminate these surfaces.
h. Carefully remove the (black) array cover from the new processor by gently lifting one end and
then the other until it easily slides up and off of the contact surface. With the array cover oriented
so that the side containing the part number is facing down towards the processor that you just
removed, gently slide the array cover over the contact surface until it snaps (before shipping it
(R)
back to IBM ). Then, place the processor that you just removed out of the way.
i. This step instructs you on how to use the special brush that was provided with the new processor.
It is important that you follow these instructions very carefully:
1) Remove the special brush from the packaging.
2) Refer to the figure below:
Figure 1. Model 830 system unit backplane (MB1)
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Hardware (Remove and Replace; Part Locations and Listings)