Lenovo ThinkPad T420 Hardware Maintenance Manual - Page 111

CPU

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1180 CPU For access, remove these FRUs in order: • "1010 Battery pack" on page 67 • "1020 ExpressCard blank bezel" on page 68 • "1050 DIMM slot cover" on page 73 • "1070 PCI Express Mini Card for wireless WAN" on page 75 • "1080 Keyboard" on page 77 • "1110 PCI Express Mini Card for wireless LAN" on page 85 • "1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card" on page 87 • "1150 Speaker assembly" on page 95 • "1160 LCD unit" on page 97 • "1170 Fan assembly" on page 101 Attention: The CPU is extremely sensitive. When you service the CPU, avoid any kind of rough handling. Removal steps of CPU Rotate the head of the screw in the direction shown by arrow 1 to release the lock, and then remove the CPU 2 . After that peel the mylar off from the CPU as shown by arrow 4 . 2 4 1 3 When installing: Make sure that the mylar is attached to the CPU. Place the CPU on the CPU socket, and then rotate the head of the screw in the direction shown by arrow 3 to secure the CPU. Chapter 8. Removing and replacing a FRU 105

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1180 CPU
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 67
•
“1020 ExpressCard blank bezel” on page 68
•
“1050 DIMM slot cover” on page 73
•
“1070 PCI Express Mini Card for wireless WAN” on page 75
•
“1080 Keyboard” on page 77
•
“1110 PCI Express Mini Card for wireless LAN” on page 85
•
“1120 Keyboard bezel assembly, FPC cable, and
Bluethooth
daughter card” on page 87
•
“1150 Speaker assembly” on page 95
•
“1160 LCD unit” on page 97
•
“1170 Fan assembly” on page 101
Attention:
The CPU is extremely sensitive. When you service the CPU, avoid any kind of rough handling.
Removal steps of CPU
Rotate the head of the screw in the direction shown by arrow
1
to release the lock, and then remove the
CPU
2
. After that peel the mylar off from the CPU as shown by arrow
4
.
2
1
3
4
When installing:
Make sure that the mylar is attached to the CPU. Place the CPU on the CPU socket, and
then rotate the head of the screw in the direction shown by arrow
3
to secure the CPU.
Chapter 8
.
Removing and replacing a FRU
105