IBM System x iDataPlex dx340, Руководство по диагностике и обслуживанию

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c. Make sure that the thermal material is still on the bottom of the heat sink;
then, align and place the heat sink on top of the microprocessor in the
retention bracket, thermal material side down. Press firmly on the heat sink.
d. Align the four screws on the heat sink with the holes on the system-board
tray.
e. Press firmly on the captive screws and tighten them with a screwdriver,
alternating among the screws until they are tight. If possible, each screw
should be rotated two full rotations at a time. Repeat until the screws are
tight. Do not overtighten the screws by using excessive force. If you are
using a torque wrench, tighten the screws to 8.5 to 13 Newton-meters (Nm)
(6.3 to 9.6 inch-pounds).
3. Install the expansion enclosure, if you removed one (see “Installing an
expansion enclosure on a system-board tray” on page 74); otherwise, install the
system-board tray cover (see “Installing the system-board tray cover” on page
122).
4. Install the system-board tray in the chassis (see “Installing the system-board
tray in a 2U chassis” on page 76 or “Installing the system-board tray in a 3U
chassis” on page 78).
Thermal grease
You must replace the thermal grease whenever the heat sink has been removed
from the top of the microprocessor and is going to be reused on another
microprocessor or when debris is found in the grease.
When you are installing the heat sink on the same microprocessor that you
removed it from, make sure that the thermal grease on the heat sink and
microprocessor is not contaminated. Never add thermal grease to the existing
thermal grease on the heat sink and microprocessor.
Note:
v
Read the safety information that begins on page vii.
v
Read the “Installation guidelines” on page 71.
v Read “Handling static-sensitive devices” on page 72.
To replace damaged or contaminated thermal grease on the microprocessor and
heat sink, complete the following steps:
1. Place the heat sink on a clean work surface.
2. Remove the cleaning pad from its package and unfold it completely.
3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat
sink.
Note: Make sure that all of the thermal grease is removed.
4. Use a clean area of the cleaning pad to wipe the thermal grease from the
microprocessor; then, dispose of the cleaning pad after all of the thermal grease
is removed.
Chapter 4. Removing and replacing server components
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