Run Diagnostic Software; Chassis Card Cage With Backplane; Removal - Sun Microsystems StorEdge A7000 Service Manual

6.26.3

Run Diagnostic Software

Run any diagnostic software as described in Chapter 4.
6.27

Chassis Card Cage with Backplane

Each Sun StorEdge A7000 model contains two 14-slot chassis card cages with
backplanes. Each can be replaced separately. Before you begin:
1. Power off the Sun StorEdge A7000, as described in Chapter 7.
2. Label cables as necessary.
3. Retain all screws and washers.
4. Keep the front and rear cabinet doors open.
5. Remove and replace all printed circuit cards in the chassis according to the
procedures in this chapter.
6.27.1

Removal

1. Go to the front of the cabinet and turn the power supply knurled knobs at the
subsystem power supply tray. Fold down the tray, pulling on the rubber grips.
2. Remove the nuts from the red +5 VDC cable lugs and black GND cable lugs at the
+5 VDC and GND bus bar terminals shown in
the cables out of the way.
3. Remove the nuts from the +12 VDC, -12 VDC, and two GND terminals shown in
FIGURE 6-32
4. At the bottom and top of the chassis, using a Philips screwdriver, remove the
screws holding the chassis to the frame, as shown in
5. Go to the rear of the cabinet. Note that there is a small rubber spacer between the
two 14-slot chassis at the top, as shown in
needlenose pliers and keep for chassis replacement.
6. At the bottom of the chassis, using a Philips screwdriver, remove the screws
holding the chassis to the frame, as shown in
7. Pull the chassis through the rear of the cabinet.
6-88 Sun StorEdge A7000 Service Manual • August 1999
and . Move the cables out of the way.
FIGURE 6-33
and
FIGURE 6-32 FIGURE 6-33
FIGURE 6-34
. Grip this spacer with
FIGURE 6-35
.
FIGURE 6-34
. Move
.