Digital Equipment EK-SFXXS-SG-003, Руководство по обслуживанию

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6–48 SF7x Storage Enclosure FRU Replacement
6.7.3 Replacing the Power Harness
Use the following procedure to remove and replace the storage enclosure
power harness (PN 17–02389–01):
1. Perform an orderly shutdown of the host system and
all
devices on
that bus. Remove ac power to the system(s).
2. Access the storage enclosure by opening the cabinet doors.
3. Take the disk ISEs in
all storage enclosures off-line:
a. Press and release all Ready buttons on the OCP (Figure 6–2).
Wait for the Ready LEDs to go out.
b. At the front of the storage enclosure, set the drive dc power
switches to
off
(Figure 6–2). The switch element LEDs should go
out to indicate that power has been removed from the disk ISE. If
any LED does not go out, suspect a faulty switch.
CAUTION
Wear an ESD grounding strap at all times while handling the
storage enclosure or any of its FRUs.
4. Remove the OCP—grasp it firmly and pull it straight out. Do not pry;
the panel comes free with a straight pull.
5. Remove the front and rear storage enclosure covers by loosening the
top captive screws and lifting up on the cover.
6. At the rear of the storage enclosure, turn off the enclosure with the ac
power switch at the rear of the power supply.
7. Turn off the circuit breaker on the power controller.
8. Disconnect the DSSI interconnect cables from the rear bulkhead of
the enclosure (Figure 6–10).
9. Disconnect the ac power cord at the rear of the enclosure.