Installing The Power Centerplane Assembly Into The Chassis - Sun Microsystems Sun Fire E25K Service Manual

15.3 Installing the Power Centerplane
Assembly into the Chassis
Caution – Be sure you are properly grounded before you begin the hardware
removal and installation. There are four ground points on the system cabinet, two at
the front top left and top right, and two at the rear top left and top right.
From the front of the system:
I
1. Install the power centerplane and attach it with the seven (7) cross-slotted
shoulder standoff screws.
The power centerplane floats on the shoulder standoff until the four remaining
screws secure it into position after the installation of the Sun Fireplane interconnect
in Step 8
Note – Securing of the ground screws at this time (after installation of the power
centerplane and the cross-slotted shoulder screws) is not advised until after the
installation of the Sun Fireplane interconnect, in
ground screws at this time.
Note – Verify the red wires are installed in the top row and the black wires are
installed in the bottom row.
2. Install the eighteen (18) voltage-and-return DC power cables to the power
centerplane.
See Section 16.2.2, "48 VDC Power Cable Replacement" on page
FIGURE 15-2
cabinet label. These labels are located inside the chassis above the lower fan trays on
the left side, respectively.
3. Connect the P0.9 six-wire friction-fit 48V power connector of the power
centerplane to J0.9 on the cable tie-down panel.
4. Connect the five (5) ribbon cable connectors to the power centerplane.
5. Install the DC cable cover and secure with nine (9) M4x8 Phillips screws.
15-6 Sun Fire E25K/E20K Systems Service Manual • April 2004
as follows.
shows the voltage-and-return reference designations on the internal
Step 7 as follows. Do not secure the
16-10.