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

Страница: 151 / 224

SF7x Storage Enclosure FRU Replacement 6–43
6.7.1 Replacing the AC Power Cord
Use the following procedure to remove and replace the storage enclosure
ac power cord (PN 17–00442–18):
1. At the system console, dismount the disk ISEs in
all storage
enclosures.
2. Access the front and rear of 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 enclosures, 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. At the rear of the storage enclosure, turn off the enclosures with the
ac power switch on the power supply.
5. Turn off the circuit breaker on the power controller.
6. Locate the ac power cord to be replaced. Loosen the lower screw of the
ac retainer bracket. Remove the upper ac power cord retainer bracket
screw and tilt the retainer 45 degrees. Then retighten the lower screw
(Figure 6–14).
7. At the lower rear of cabinet, open DSSI I/O panel by loosening the two
captive screws on the right.
CAUTION
Use care not to disturb or damage any power cords, and DSSI
interconnect cables, that are already connected to the DSSI
I/O panel.
8. Unplug the faulty ac power cord from the back of the storage
enclosure or the magazine tape, and from the power controller.