Sun Microsystems Sun Fire E25K Service Manual page 143

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.
1. Open the Sun Fire E25K/E20K system cabinet access doors.
Caution – Before removing a board from the system, the green activation LED must
be off and the amber or blue removal OK LED must be on. See
"Powering Off a Centerplane Support Board" on page
2. Power off and remove the SC.
See Section 6.1.2.2, "Powering Off a System Control (SC) Board" on page
See Section 6.1.2.3, "Removing a System Control (SC) Board" on page
3. Remove the SC peripheral board that occupies the same carrier plate as the
centerplane support board being replaced.
See Section 7.2.3, "Removing a System Control (SC) Peripheral Board" on page
Caution – Never remove the carrier plate while it contains slot 0 or slot 1 boards as
this will cause severe damage to the connector system. Review
Board Set Carrier Plate" on page
4. Be sure to read the label on the inside corner trims of the chassis and then use the
two (2) 0.5 in. (13 mm) nut drivers to loosen the carrier plate captive ejector screws
simultaneously until they are fully disengaged.
5. Use the front handle to extract the carrier plate, supporting the bottom with the
other hand, and place it on a flat, sturdy, ESD-protected surface with the
component side up.
6. Disconnect the LED ribbon cable from the connector (J6) on the centerplane
support board.
7. Using a Phillips No. 2 screwdriver, remove the two (2) M3 cross-slotted shoulder
panhead screws.
8. Remove the eight (8) M3x8 panhead screws.
9. Firmly grasp the centerplane support board lifting upward and pulling out away
from the carrier plate standoffs (
10-2.
).
FIGURE 11-2
Chapter 11 System Control Expander Board Set
Section 11.2.2,
11-4.
6-4.
6-7.
Section 10.1, "Inserting a
7-5.
11-5