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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 88).
4.
Remove the backup battery (see “1090 Backup battery” on page 103).
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.
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ThinkPad W700 and W700ds Hardware Maintenance Manual
Содержание ThinkPad 700
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Страница 97: ...1020 Digitizer pen Table 10 Removal steps of digitizer pen 2 1 Removing and replacing a FRU 89 ...
Страница 105: ...Table 14 Removal steps of palm rest continued 2 3 3 4 5 Removing and replacing a FRU 97 ...
Страница 114: ...Table 19 Removal steps of numeric keypad continued 2 a 106 ThinkPad W700 and W700ds Hardware Maintenance Manual ...
Страница 123: ...Table 24 Removal steps of Intel Turbo Memory Minicard continued 4 Removing and replacing a FRU 115 ...
Страница 130: ...Table 30 Removal steps of video card continued 3 122 ThinkPad W700 and W700ds Hardware Maintenance Manual ...
Страница 153: ...Table 41 Removal steps of LCD panel hinges and LCD cable continued 2 3 3 Removing and replacing a FRU 145 ...
Страница 163: ...Table 44 Removal steps of second LCD panel for ThinkPad W700ds continued 4 Removing and replacing a FRU 155 ...
Страница 197: ...LCD FRUs for ThinkPad W700ds 3 4 8 7 6 2 1 14 13 11 12 10 9 15 5 Parts list 189 ...
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Страница 216: ...Part Number 43Y9442_05 1P P N 43Y9442_05 ...