5. Are you removing MB1?
v No: Continue with step 6 (See page 39).
v Yes: Perform the following:
a. Remove any cables from MB1, and note the locations.
b. Remove the small cover on the top rear of the frame by pulling the locking button out and sliding
the cover to the rear and up. See Model 825 - Covers.
c. Release the latches that hold the card in place, and rotate it upwards.
d. Pull the card out of the frame.
e. Reverse this procedure to install the card.
This
ends the procedure.
6.
You are removing MB2. Remove the card in position C13. See Model 825 - Cards (dedicated).
7. Remove the six screws retaining MB2.
8. Remove MB2 from the frame.
9. Reverse this procedure to install the card.
This ends the procedure.
Model 825 - Interlock switch
For use by authorized service providers.
Use this procedure to remove or replace the Interlock switch on a Model 825.
To remove or replace the Interlock switch:
1. Power off the system. See Power on/off the system and logical partitions.
2. Unplug both power cords from the back of the system unit.
3. Remove the left side, right side, and top cover. See Model 825 - Covers.
4. Remove the white plastic shield that is covering the SCSI and air moving devices (AMDs), located on
the left side of the system.
Figure 1. The white shield covering the SCSI and air moving devices
Analyze hardware problems 39
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