3. Perform the following:
a. Tighten the left thumb screw four turns with the torque tool (PN 6422789). Then, tighten the right
thumb screw four turns.
b. Torque the left thumb screw to completion, followed by the right thumb screw.
c. Return to the left thumb screw and assure it is torqued.
d. Make sure that the BPR release levers are in the ’down’ position.
4. Set the BPR’s on-lock/off-unlock switch to the ’on’ position (to the ’left’ side) on the associated BPR.
5. To indicate completion of these steps, press the (white) Service Complete button on the EPO panel.
This ends the procedure.
Models 870 and 890 - Capacitor books and blanks
For use by authorized service providers.
Use this procedure to remove or replace capacitor books and blanks on the Models 870 and 890.
The following safety notice applies to power related field replaceable units.
DANGER
Do not attempt to open the covers of the power supply. Power supplies are not serviceable and are to be
replaced as a unit. (RSFTD217)
To remove capacitor books and blanks:
1. Power off the system. See “Power on/off the system and logical partitions” on page 561.
2. If you have not already done so, open the rear door of the rack unit.
3. Locate the capacitor book or blank to be removed.
4. Loosen the upper and lower fasteners, using the torque tool (P/N 6422789), alternating between the
fasteners until the unit can slide out of the slot.
5. Grasp both sides of the capacitor book or blank, and pull it out of the drawer.
To replace Capacitor books and blanks:
1. Carefully slide the capacitor book into the slot as far as possible (the back edge of the top of the
capacitor book is about .25 inch from the cage bracket).
Note: Do not force the capacitor book against the backplane, as this may damage the connector.
2. Hold the upper part of the capacitor book against the backplane and use the torque tool to start the
upper fastener about two turns into the cage bracket.
3. Do the same with the lower fastener.
4. Alternate tightening the upper and lower fasteners until both are fully torqued in.
5. Check torque on both fasteners.
6. If any cables were removed during the removal procedure, plug all cables into their correct locations.
7. Power on the system. See “Power on/off the system and logical partitions” on page 561.
This ends the procedure.
Models 870 and 890 - Covers
For use by authorized service providers.
Use this procedure to remove or replace the covers on the Models 870 and 890.
Attention: If removing the cover while powered on, errors may occur due to electromagnetic interference.
To remove or replace the front and rear covers:
Analyze hardware problems 97
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