Huawei N2000H V3 - Page 203

N2000H V3 Appliance
User Guide
7 Replacing Parts
Issue 04 (2018-11-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
194

You have determined the position on the N2000H V3 for installing a CPU.

You have obtained the rack number and chassis number of the N2000H V3, and labeled
its panel to prevent misoperations.
Tools

ESD wrist strap

M3 Phillips screwdriver
Hardware
You have obtained a spare CPU.
Procedure
1. Take the new CPU out of the ESD bag.
2. Before installing CPUs, ensure that CPU sockets do not have bent bins and are free from
foreign objects.
If CPU sockets have bent bins or foreign objects are detected on CPU sockets, stop installing
CPUs and contact Huawei technical support.
3. Before installing a CPU or heat sink, use tissue to clean up the oil, remaining thermal
grease, or foreign objects on their surfaces.
4. Determine the area on the heat sink for contacting the CPU, and paste thermal grease in
the center of the area.
Paste appropriate amount of thermal grease evenly on the CPU surface.
Use a syringe to measure the thermal grease for pasting to the CPU. Table 5-1 lists the
quantity of thermal grease used for different chip sizes.
Table 7-1 Quantity of thermal grease
Chip Size
Quantity of Thermal Grease
50 mm x 50 mm
0.4 ml
40 mm x 40 mm
0.3 ml
30 mm x 30 mm
0.2 ml
20 mm x 20 mm
0.15 ml
Figure 5-52 shows the methods for pasting thermal grease. These methods are described
as follows:
− Single-point pasting: for a small socket.
− Single-line pasting: for a long socket.