User`s guide

RAID Array 3000 Pedestal Enclosure
3–10 EK–SMCPO–UG. A01
3.6.5 Replacing the EMU Board
WARNING
Only qualified service personnel should replace
the EMU . Dangerous voltages are exposed when
the pedestal side panel is removed. Always power
off the pedestal and remove the power cords be-
fore replacing the EMU.
Perform the following procedure to replace the EMU Board:
Tools required:
•
Flat-blade or 3/16 (5 mm) hex-head screwdriver
•
# 10 TORX-head screwdriver
1. Quiesce the host bus by shutting down the host system.
CAUTION
To allow the UPS to supply power while the cache
is being flushed to disk, do not unplug the base
pedestal from the UPS.
2. Unplug the base pedestal power cord from the wall outlet.
3. Unplug the UPS power cord from the wall outlet, the UPS will now signal
the controller to flush the cache.
4. Wait until the UPS shuts down completely (this may take several minutes).
5. Power off the base pedestal and plug the UPS power cord into the wall out-
let.
6. Remove the pedestal door.
7. Remove the left side cover from the pedestal (see section 2.3, Chapter 2).
8. Record the orientation of the color traces on the two ribbon cables connected
at the rear of the EMU board and disconnect the cables.
9. Remove the mounting nuts from the UPS and external fault connectors on
the rear panel using a hex-head or a flat-blade screwdriver (see Figure 3–7).
Remove the board from the pedestal.