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 54).
4. Remove the backup battery (see “1130 System board, fan assembly, and backup battery” on page 74).
5. Measure the voltage of the backup battery. See the following figure.
Wire
Voltage (V dc)
Red
+2.5 to +3.2
Black
Ground
• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the backup battery.
• If the backup battery discharges quickly after replacement, replace the system board.
Chapter 3
.
General checkout
33
Summary of Contents for 350828U
Page 1: ...Hardware Maintenance Manual ThinkPad X100e and X120e ...
Page 6: ...iv Hardware Maintenance Manual ...
Page 11: ...DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 5 ...
Page 12: ...DANGER 6 Hardware Maintenance Manual ...
Page 13: ...PERIGO PERIGO PERIGO Chapter 1 Safety information 7 ...
Page 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO DANGER 8 Hardware Maintenance Manual ...
Page 15: ...DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 9 ...
Page 16: ...DANGER DANGER VORSICHT VORSICHT VORSICHT 10 Hardware Maintenance Manual ...
Page 17: ...VORSICHT VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...
Page 18: ...12 Hardware Maintenance Manual ...
Page 19: ...Chapter 1 Safety information 13 ...
Page 20: ...14 Hardware Maintenance Manual ...
Page 21: ...Chapter 1 Safety information 15 ...
Page 22: ...16 Hardware Maintenance Manual ...
Page 23: ...Chapter 1 Safety information 17 ...
Page 24: ...18 Hardware Maintenance Manual ...
Page 40: ...34 Hardware Maintenance Manual ...
Page 96: ...90 Hardware Maintenance Manual ...
Page 114: ...LCD FRUs 1 4 3 2 5 7 6 108 Hardware Maintenance Manual ...
Page 131: ......
Page 132: ...Part Number 63Y0640_06 Printed in 1P P N 63Y0640_06 63Y0640_06 ...