Oracle SPARC Enterprise M4000, Installation And Service Manual, Page: 121 / 182

Chapter 4 Servicing and Replacing Components 4-25
5. At the rear of the External I/O Expansion Unit, disconnect the AC cords from the
internal AC cables.
6. Move the cable plate to the service position:
a. Loosen the cable plate locking screw(s) (item 3 in
FIGURE 4-4
).
b. Pull the cable plate toward you approximately 0.5 in./13 mm, then raise it
approximately 0.75 in./20 mm, until the bottom of the plate is above the tops
of the support brackets.
c. Push the cable plate forward to its service position (
FIGURE 4-4
) so that the
cable plate rests on the support brackets.
The tabs on the sides of the cable plate should lie in the small notches on the
tops of the support brackets.
7. Label all I/O cables.
8. Disconnect the link cable from the link card in slot 0 in each I/O boat
9. Disconnect all I/O cables from the PCI cards in the External I/O Expansion Unit.
10. Remove the I/O boat(s) from the original External I/O Expansion Unit:
a. Loosen the two captive screws located at the top of the I/O boat.
b. Pull the I/O boat out of the chassis approximately 6 in./150 mm.
c. Support the bottom of the I/O boat with one hand, then pull the boat out of
the slot.
d. Set the I/O boat flat on an antistatic surface.
Caution – Do not rest an I/O boat vertically. The plastic electrical connector on the
back is breakable.
e. Note which boat is boat 0 and which is boat 1 so that they will go in the same
slots in the replacement chassis.
Label the boats.
11. Remove the PSUs from the front of the External I/O Expansion Unit:
a. Loosen the handle locking screw on the PSU handle.
b. Unlock the PSU by pulling it out 90 degrees.
c. Pull the PSU out approximately 6 in./150 mm and stop.