IBM DR550, Руководство по диагностике и обслуживанию, Страница: 38 / 258

When CB3 is on (pushed in) AC power is being distributed to J6 through J10.
When CB3 is off (pulled out), AC power is not being distributed to J6 through J10.
Make sure CB2 and CB3 are pushed in, and make sure that the device power cords
are plugged at the PCA power outlets. Then proceed to “Checking jumpers.”
Checking jumpers
Ensure that the jumper at connector J17 (front of PCA) and the jumper at connector
J14 (rear of PCA) are plugged.
Note:
Depending how the rack is configured, access to the rear of the PCA is
available:
v
From the rear interior of the rack
v
By removing the PCA from the rack
If the power problem continues, replace the failing PCA. Order a new PCA and see
“Replacing a PCA.”
Replacing a PCA
To replace a PCA:
1. Turn off the client’s power source to the failing PCA.
2. Unplug the rack power cord from the PCA.
3.
Unplug the device power cords from the PCA.
4. Unplug the jumper from connector J17 on the front of the PCA.
5.
Remove the PCA from the rack by removing two screws from each end of the
PCA and slide out the PCA from the rack.
6. Unplug the jumper from connector J14 at the rear of the PCA.
7. Plug the jumper into connector J14 on the new PCA.
8. Slide the new PCA into the rack position from which the failing PCA was
removed.
9. Secure the PCA to the rack with the screws that were previously removed
when the failing PCA was removed.
10.
Replug all device power cords. The power cord ends are labeled with the PCA
position it is to be plugged to.
11. Replug the jumper to connector J17 on the front of the PCA.
12.
Replug the rack power cord to the PCA.
13. Turn on the client’s power source to the PCA.
Model DR2 power control assembly power problems
Use the following information and Figure 2 on page 11 when debugging a power
problem with the model DR2 power control assembly.
10
DR550 Version 4.5 Problem Determination and Service Guide