18. Remove the screws in the sides and bottom of the system rack regulator cage that
mount the cage into the rack. Slide the regulator cage out 15 cm (6 inches).
19. Disconnect the power cables that are connected to the lower-right and lower-left
corners of the system backplane assembly.
Refer to “Power Subframe (Rear View, 1 of 3)” on page 558 for power subframe
assembly parts, and then perform the following steps from the REAR of the system.
20. Remove the screws from the top and bottom of the power Subframe Assembly.
21. Remove the power Subframe Assembly.
Replacement
Replace in reverse order.
Programmable Power Regulators
Before performing these procedures, read “Safety Notices” on page xiii.
This procedure is for removing or installing programmable regulator cards in positions
R01 - R10. See “Electronic Cards” on page 496 for removal and replacement
procedures for the processor regulator cards or the clock/processor regulator card.
Removal
Note: Before removing and installing regulators, the system must be powered off and
the ac power cords disconnected from the source.
1. Power off the system (see “Powering Off and Powering On the System” on
page 492).
2. Disconnect the ac power cords.
3. Remove the front covers (see “Covers” on page 494).
4. Remove the system rack front power EMC shield that covers the regulators..
5. Make note of the regulator position, and then remove the regulator.
Replacement
Replace in reverse order.
SPCN Card
Before performing these procedures, read “Safety Notices” on page xiii.
Removal
1. Power off the system (see “Powering Off and Powering On the System” on
page 492).
2. Disconnect the ac power cord.
3. Remove the rear cover (see “Covers” on page 494).
Refer to “Rear Electronics Cage” on page 554 for SPCN card and then perform the
following steps from the rear of the system.
502 Service Guide
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