
Checking
the
backup
battery
Do
the
following:
1.
Power
off
the
computer,
and
unplug
the
ac
adapter
from
it.
2.
Turn
the
computer
upside
down.
3.
Remove
the
battery
pack
(see
“1010
Battery
pack”
on
page
61).
4.
Remove
the
backup
battery
(see
“1080
Backup
battery”
on
page
77).
5.
Measure
the
voltage
of
the
backup
battery.
See
the
following
figure.
Red (+)
Black (-)
Wire
Voltage
(V
dc)
Red
+2.5
to
+3.2
Black
Ground
v
If
the
voltage
is
correct,
replace
the
system
board.
v
If
the
voltage
is
not
correct,
replace
the
backup
battery.
v
If
the
backup
battery
discharges
quickly
after
replacement,
replace
the
system
board.
General
checkout
31
Содержание ThinkPad X301
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Страница 6: ...Common service tools 141 Notices 143 Trademarks 144 iv ThinkPad X301 Hardware Maintenance Manual ...
Страница 8: ...vi ThinkPad X301 Hardware Maintenance Manual ...
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Страница 30: ...22 ThinkPad X301 Hardware Maintenance Manual ...
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Страница 89: ...Table 21 Removal steps of palm rest continued 5 6 8 7 7 8 8 ThinkPad X301 81 ...
Страница 115: ...Table 33 Removal steps of antenna assembly continued 2 3 ThinkPad X301 107 ...
Страница 118: ...Table 34 Removal steps of hinge L and hinge R continued 3 3 110 ThinkPad X301 Hardware Maintenance Manual ...
Страница 124: ...Overall 1 2 3 4 5 6 8 9 10 11 12 13 b 14 15 16 17 18 19 20 21 22 a 7 116 ThinkPad X301 Hardware Maintenance Manual ...
Страница 135: ...LCD FRUs 1 2 3 4 5 a 7 6 9 8 10 ThinkPad X301 127 ...
Страница 150: ...142 ThinkPad X301 Hardware Maintenance Manual ...
Страница 153: ......
Страница 154: ...Part Number 43Y9441_02 1P P N 43Y9441_02 ...