Technical data

SCSI Device Storage Module Procedures
4-13
4
SCSI Device Storage Module Removal and Replacement
The SCSI Device Storage Module, if present, is mounted on guide
pins directly atop the chassis. It receives power from the VME card
cage through a connector at the top of the chassis. SCSI signals pass
through an external cable at the back of the system.
Module Removal
1. Switch all chassis power to
STANDBY and disconnect the
power cord(s) from the AC or DC power source:
– If the power supply is an AC unit, unplug the power cord
from the AC outlet.
– If the power supply is a DC unit, turn off the -48Vdc power
source and unclamp the DC leads from the terminal block
on the power supply.
2. Disconnect the SCSI cable from the back of the card cage and
the expansion chassis.
3. If a front bezel is installed over the expansion chassis, remove
the bezel.
4. Depending on your configuration, proceed as necessary to
gain access to the top of the expansion chassis:
– If the system is in a pedestal configuration, remove the
pedestal cover, side panels and brackets, and any units
stacked above the expansion chassis.
– If the system is in a rack/mast configuration, take the unit
down from its mounting location.
5. Remove the five flat-head screws that secure the top cover to
the expansion chassis and remove the cover.
6. Remove the four screws from the inside corners of the
expansion chassis (these secure the expansion chassis to the
VME card cage).
7. Lift the expansion chassis straight up off the VME card cage.