Sun Microsystems Sun Fire E25K Service Manual page 176

1. Remove all system expander and the centerplane support board sets by following
the procedures in:
Section 12.2.3, "Removing an Expander Board" on page 12-5
I
Section 11.2.3, "Removing a Centerplane Support Board" on page 11-4
I
2. Remove the Sun Fireplane interconnect prior to removing the power centerplane.
See Section 13.4, "Removing the Sun Fireplane Interconnect From the Chassis" on
page
3. Remove fan tray F7, to access the two (2) lower M4x8 Phillips screws of the DC
cable cover, and place on a flat, sturdy, surface.
See Section 4.2.3, "Removing a Fan Tray" on page
4. Remove the DC cable cover by removing the nine (9) M4x8 Phillips screws from
the DC cable cover.
5. Remove the five (5) ribbon cable power control connectors from the power
centerplane (
Backplane power module
connectors to expander
EX0-EX8 (front)
EX9-EX17 (rear)
Holes for cross-slotted
shoulder standoffs and
nuts (7)
Holes for grounding
screws (4)
J0.9 front male connector (J1.9 rear)
FIGURE 15-1
6. From the cable tie-down panel beneath the power centerplane, disconnect the P1.9
six-wire friction-fit 48V power connector from J1.9 by depressing the end clips.
15-4 Sun Fire E25K/E20K Systems Service Manual • April 2004
13-5.
).
FIGURE 15-1
Alignment hold
on cable tie-down panel
Power Centerplane Power Control Connections
4-4.
Ribbon cable power control connectors
(JX.FB, JX1.PS, JX0.PS, JX.FT, J0.FM)
Alignment hold
Voltage-and-return DC power 6-pin connector
P0.9 front female connector (P1.9 rear)
Very high density
metric (VHDM)
connector (to the
centerplane support
board, CS0 and CS1)
Voltage-and-return
DC power connectors
(18)