Clock
Board
Assembly
Access
4-23
Reassembly Notes
When
installing board, hold by ejectors
and
use side
edge
of
board
to
move
air controller
out
of the way
and
onto
board.
Insert
board
firmly in stack
motherboard
and
push
ejectors in to lock
it
in place.
Reinstall processor stack
door
by
first attaching with two thumbscrews
at
top of
door
and
then installing two bottom screws. Firmly tighten all
screws to
prevent
RFI
radiation.
1.
UNPLUG COMPUTER POWER CORD FROM
AC
OUTLET.
2.
Open left door as previously described.
3. Disconnect
lOP expander cables, if present, from processor stack door (Figure 4-17).
4.
Loosen two captive thumbscrews on processor stack door (Figure 4-20)
and
swing door
open, allowing door to rest
in
open
position.
CAUTION
CAREFULLY HANDLE BOARD
TO
AVOID DAMAGE FROM ELEC-
TROSTATIC DISCHARGE OR OTHER CAUSES. HOLD
BY
EJEC-
TORS OR SIDE EDGES ONLY. DO NOT TOUCH EDGE CONNEC-
TOR
CONTACTS
OR
BOARD PLANES. IMMEDIATELY PLACE
BOARD
IN
ANTISTATIC BAG OR ON ANTISTATIC SURFACE.
5. Remove boards
in
slots 5-12 by pulling out
on
ejectors to release boards from stack mother-
board
and
sliding boards out of slots.
6.
Loosen two slotted captive screws that hold clock board to stack motherboard (Figure 4-22).
7.
Disconnect clock board from processor stack motherboard at inline connector (Figure 4-22).
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