Lenovo ThinkPad 390X ThinkPad 390 / i Series 1720 models Hardware Maintenance - Page 73

Combo Bay Interposer Board, See Replacing the System Board

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"Power Latch, IR Board, and DC-DC & BATT Board" on page 63 Note: See "Replacing the System Board" on page 48 before proceeding. Remove the two screws from the planar board and gently remove the planar board from the base cover ASM. Step Size (Quantity) Head & Color Torque 1 M2.5 x 6L (2) Pan head, 3.2 kgf-cm black Note: Make sure you use the correct screw for replacement. Combo Bay Interposer Board "Battery ASM" on page 49 "Hard Disk Drive" on page 49 "Combo Bay" on page 50 "Keyboard" on page 54 "LED Board" on page 56 "Upper Heatsink" on page 56 "CPU Board" on page 58 "LCD Panel ASM" on page 59 "Upper Cover ASM" on page 60 "IMM Lower Heatsink ASM" on page 62 "Fan ASM" on page 62 "Power Latch, IR Board, and DC-DC & BATT Board" on page 63 ThinkPad 390/i Series 1700 65

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±
“Power Latch, IR Board, and DC-DC & BATT Board”
on page
63
Note:
See “Replacing the System Board” on page
48
before proceeding.
Remove the two screws from the planar board and gently
remove the planar board from the base cover ASM.
Step
Size (Quan-
tity)
Head &
Color
Torque
1
M2.5 x 6L (2)
Pan head,
black
3.2 kgf-cm
Note:
Make sure you use the correct screw for replacement.
Combo Bay Interposer Board
±
“Battery ASM” on page
49
±
“Hard Disk Drive” on page
49
±
“Combo Bay” on page
50
±
“Keyboard” on page
54
±
“LED Board” on page
56
±
“Upper Heatsink” on page
56
±
“CPU Board” on page
58
±
“LCD Panel ASM” on page
59
±
“Upper Cover ASM” on page
60
±
“IMM Lower Heatsink ASM” on page
62
±
“Fan ASM” on page
62
±
“Power Latch, IR Board, and DC-DC & BATT Board”
on page
63
ThinkPad 390/i Series 1700
65