Lenovo ThinkPad T21 T20, T21, T22, T23 - Hardware Maintenance Manual (April 20 - Page 112
parts. The protruding parts of the sheet can, cause electrical short.
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Removing and replacing a FRU When installing: Make sure the followings: v a -parts of the insulation do not come off. v b -part ( b' s are only for T23 series) is not turned over. v Holes in the guide rail and in the aluminium sheet are aligned, and the aluminium sheet does not protrude in the c -parts. The protruding parts of the sheet can cause electrical short. a b c a b' a b' 106 ThinkPad T20, T21, T22, T23 (MT 2647/2648)
When installing:
Make sure the followings:
v
±a²
-parts of the insulation do not come off.
v
±b²
-part (
±b'²
s are only for T23 series) is not turned
over.
v
Holes in the guide rail and in the aluminium sheet are
aligned, and the aluminium sheet does not protrude in
the
±c²
-parts. The protruding parts of the sheet can
cause electrical short.
a
c
a
b
b'
b'
a
Removing and replacing a FRU
106
ThinkPad T20, T21, T22, T23 (MT 2647/2648)