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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 85).
4.
Remove the backup battery (see “1060 Backup battery” on page 100).
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 X200, X200s, X200si, X201, X201i, and X201s Hardware Maintenance Manual
Summary of Contents for ThinkPad X200 Tablet 7453
Page 1: ...ThinkPad X200 X200s X200si X201 X201i and X201s Hardware Maintenance Manual ...
Page 2: ......
Page 3: ...ThinkPad X200 X200s X200si X201 X201i and X201s Hardware Maintenance Manual ...
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Page 18: ...10 ThinkPad X200 X200s X200si X201 X201i and X201s Hardware Maintenance Manual ...
Page 19: ...Safety information 11 ...
Page 26: ...18 ThinkPad X200 X200s X200si X201 X201i and X201s Hardware Maintenance Manual ...
Page 27: ...Safety information 19 ...
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Page 29: ...Safety information 21 ...
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Page 31: ...Safety information 23 ...
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Page 35: ...Safety information 27 ...
Page 37: ...Safety information 29 ...
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Page 43: ...Safety information 35 ...
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Page 289: ...12 1 in WXGA TFT 1 2 3 5 4 6 7 8 Parts list 281 ...
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