Removing The Power Centerplane - Sun Microsystems Sun Fire E25K Service Manual

As a superuser on the main SC, shutdown the main SC by typing:
I
sc# shutdown -y -g seconds -i 0
where seconds is the amount of time before shutdown.
4. Open the Sun Fire E25K/E20K system cabinet access doors.
Note – All DC circuit breakers are to remain in the on position at all times.
5. Power off the AC0 and AC1 circuit breakers for all power supplies in the system.
6. Label and disconnect the twelve (12, six per side) AC power cords with the labels
provided in the ship kit.
7. Label and disconnect all I/O cables from the front and rear of the system and set
aside.
15.2

Removing the Power Centerplane

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.
The actual removal of the power centerplane is from the front of the system but the
initial removal procedures starts at the rear of the system.
From the rear of the system:
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Note – Boards should be removed by pulling outward using the front handle with
one hand and placing the other hand underneath the bottom guide rail for
additional support. Carry the board to a work area holding vertically, with the
connector downward, by the front handle. Lift the board and place the other hand
under the bottom, or back, of the board placing the bottom, or back, on an ESD-
protected surface. Never place the weight of a board on its connector as it is easily
damaged.
Chapter 15 Power Centerplane Replacement Procedure 15-3