Compaq AlphaServer ES45 Service Manual page 327

WARNING: To prevent injury, unplug the power cord
from each power supply before installing compo-
nents.
WARNING: Modules have parts that operate at high
!
temperatures. Wait 2 minutes after power is removed
before touching any module.
CAUTION: When removing the system motherboard, be careful not to flex the
board. Flexing the board may damage the BGA component connec-
tions.
NOTE: Replacing the system motherboard requires the removal of other FRUs.
Review the removal procedures for the fans, MMBs, CPUs, and drive
cage before beginning the system motherboard removal procedure.
1. Remove the three covers from the system chassis.
2. Remove fans 3 and 4 in the PCI area (the inner fans).
3. Record the positions of the MMBs and CPUs, and remove the MMBs and
CPUs.
4. Remove the CPU airflow deflectors
5. Loosen the three captive Phillips screws holding the middle support
bracket . The screws pop up when sufficiently loosened. Pull the bracket
straight out.
6. Remove the drive cage (left cage in pedestal/rack, bottom cage in tower), if
installed, or the blank panel.
7. Remove the two Phillips flat-head screws that secure the small cover
the left side (pedestal/rack) or bottom (tower) of the system and remove the
cover. Set aside the screws. (The cover provides access to the power har-
ness.)
, if present.
FRU Removal and Replacement
to
8-63