4 Replacement Procedures 4.22 North bridge heat sink/CPU heat sink/Fan/CPU
4. Apply new grease on the CPU and North bridge using a special syringe as shown in
the following figure. Apply quarter of scale (0.25ml) of grease evenly on the CPU
chip and North bridge chip. When silicon grease is already applied to the CPU, wipe
them off with a cloth in advance.
Figure 4-39 Applying new grease
5. Stick the insulator to the fan in place to secure the fan cable to the fan.
6. Install the fan to the CPU heat sink and secure them with the following screws.
• M2.5×3B FLAT HEAD screw ×2
7. Install the fan holder in place.
8. Install the CPU heat sink (with the fan) in place.
9. Connect the fan cable to the connector CN8771 on the system board and stick the
acetate tape on it.
10. Install the CPU hold plate and metal plate on the CPU heat sink and secure them
with the following screws in the order of the number marked on the CPU hold plate.
• M2×4B BIND screw ×3
11. Install the North bridge heat sink in place.
12. Install the North bridge hold plate on the North bridge heat sink and secure them
with the following screws in the order of the number marked on the North bridge
hold plate.
• M2×4B BIND screw ×2
4-54 [CONFIDENTIAL] TECRA M9 Maintenance Manual (960-631)