Terminal
Voltage (V dc)
1
+ 0 to + 12.6
7
Ground (-)
1(+)
2(+)
3
4
5
6(-)
7(-)
3. If the voltage is less than +11.0 V dc, the battery pack has been discharged.
Note:
Recharging will take at least 3 hours, even if the indicator does not turn on.
If the voltage is still less than +11.0 V dc after recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 5 and 7.
The resistance must be 4 to 30 K Ω. If the resistance is not correct, replace the battery pack. If the
resistance is correct, replace the system board.
Checking the backup battery
Do the following:
1. Power off the computer, and unplug the ac power adapter from it.
2. Turn the computer upside down.
3. Remove the battery pack (see “1010 Battery pack” on page 62).
4. Remove the backup battery (see “1080 Backup battery” on page 70).
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.
32
Hardware Maintenance Manual
Summary of Contents for Edge E445
Page 1: ...Hardware Maintenance Manual ThinkPad Edge E445...
Page 6: ...iv Hardware Maintenance Manual...
Page 11: ...DANGER 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 8 Hardware Maintenance Manual...
Page 15: ...DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 9...
Page 16: ...DANGER DANGER DANGER VORSICHT VORSICHT 10 Hardware Maintenance Manual...
Page 17: ...VORSICHT 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 24: ...18 Hardware Maintenance Manual...
Page 25: ...Chapter 1 Safety information 19...
Page 26: ...20 Hardware Maintenance Manual...
Page 27: ...Chapter 1 Safety information 21...
Page 28: ...22 Hardware Maintenance Manual...
Page 32: ...26 Hardware Maintenance Manual...
Page 52: ...46 Hardware Maintenance Manual...
Page 60: ...LCD FRUs and CRUs 6 7 2 3 4 2 3 4 6 7 5 1 1 1 54 Hardware Maintenance Manual...
Page 62: ...56 Hardware Maintenance Manual...
Page 110: ...104 Hardware Maintenance Manual...
Page 111: ......
Page 112: ...Part Number 0C11030 Printed in China 1P P N 0C11030...
Page 113: ...1P0C11030...