Lenovo ThinkPad 390X Hardware Maintenance Manual (November 1999): ThinkPad 390 - Page 92

System Board, See Replacing the System Board

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Page 92 highlights

System Board "Battery" on page 61 "Hard Disk Drive" on page 62 "Combo Bay" on page 63 "Keyboard" on page 70 "LED Board" on page 72 "Upper Heatsink" on page 73 "CPU Board" on page 76 "LCD Panel" on page 77 "Upper Cover" on page 79 "IMM Lower Heatsink" on page 81 "Fan" on page 82 "Speakers" on page 83 Note: Only for 15.0-inch LCD models. "Power Latch, IR Board, and DC-DC & BATT Board" on page 85 Note: See "Replacing the System Board" on page 59 before proceeding. Remove the two screws from the system board and gently remove the system board from the base cover. 1 3 2 2 Step Size (Quantity) Head & Color Torque 1 M2.5 x 6L (2) Flat head, black 2.0 kgf-cm 2 M2.5 x 6L (1) Flat head, black 2.0 kgf-cm Note: Make sure you use the correct screw for replacement. 86 ThinkPad 390X / i 1700 HMM

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System Board
±
“Battery” on page
61
±
“Hard Disk Drive” on page
62
±
“Combo Bay” on page
63
±
“Keyboard” on page
70
±
“LED Board” on page
72
±
“Upper Heatsink” on page
73
±
“CPU Board” on page
76
±
“LCD Panel” on page
77
±
“Upper Cover” on page
79
±
“IMM Lower Heatsink” on page
81
±
“Fan” on page
82
±
“Speakers” on page
83
Note:
Only for 15.0–inch LCD models.
±
“Power Latch, IR Board, and DC-DC & BATT Board”
on page
85
Note:
See “Replacing the System Board” on page
59
before proceeding.
Remove the two screws from the system board and gently
remove the system board from the base cover.
1
2
3
2
Step
Size (Quan-
tity)
Head &
Color
Torque
1
M2.5 x 6L (2)
Flat head,
black
2.0 kgf-cm
2
M2.5 x 6L (1)
Flat head,
black
2.0 kgf-cm
Note:
Make sure you use the correct screw for replacement.
86
ThinkPad 390X / i 1700 HMM