Step 2.
Remove the cleaning pad from its package and unfold it completely.
Step 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.
Step 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.
Step 5.
Use the thermal-grease syringe to place 9 uniformly spaced dots of 0.02 ml each on the top of
the microprocessor. The outermost dots must be within approximately 5 mm of the edge of the
microprocessor; this is to ensure uniform distribution of the grease.
Microprocessor
0.02 mL of thermal
grease
Figure 83. Thermal grease distribution
Note:
If the grease is properly applied, approximately half of the grease will remain in the syringe.
Figure 84. Syringe
Step 6.
Install the heat sink onto the microprocessor.
Removing the power interface board
Use this information to remove the power interface board from the server.
Read the safety information in “Safety” on page v and “Installation guidelines” on page 75.
If you are replacing a server component or installing an optional device in the server, you need to slide the
server out from the rack enclosure, turn off the server and peripheral devices, and disconnect the power
cords and all external cables.
To remove the power interface board, complete the following steps.
Step 1.
Remove the fan cage cover (see “Removing the fan cage cover” on page 82).
Step 2.
Remove the system management board cover (see “Removing the system management board
cover” on page 84).
Step 3.
Remove the system fan (see “Removing a system fan” on page 88).
Step 4.
Remove the fan cage (see “Removing the fan cage” on page 105).
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Lenovo ThinkServer sd350 Server Type 5493, Lenovo ThinkServer n400 Enclosure Type 5495Installation and Service Guide
