IBM 7378, Problem Determination And Service Manual

Page: 307 / 362

Attention: Do not touch the thermal grease on the bottom of the heat sink or
set down the heat sink after you remove the plastic cover. Touching the
thermal grease will contaminate it. If the thermal grease is contaminated, call
IBM service to request a replacement thermal grease kit. For information about
installing the replacement thermal grease, see “Thermal grease” on page 291.
a. Make sure that the heat-sink release lever is in the fully open position.
b. Remove the plastic protective cover from the bottom of the heat sink, if one
is installed.
c. Position the heat sink above the microprocessor with the thermal-grease
side down.
Attention: The heat sink is keyed to the retention module. Make sure
that the notch on the heat sink fits over the alignment tab on the retention
module.
d. Align the notch on the heat sink with the alignment tab on the retainer
module.
e. Slide the rear flange of the heat sink into the opening in the retainer
bracket.
f. Press down firmly on the front of the heat sink until it is seated securely.
g. Rotate the heat-sink release lever to the closed position and hook it
underneath the locking tab.
Chapter 5. Removing and replacing server components
289