General checkout
21
To verify a symptom, follow the steps below:
1.
Turn off the computer.
2.
Remove the battery pack.
3.
Connect the AC adapter.
4.
Make sure that power is supplied when you turn on the computer.
5.
Turn off the computer.
6.
Disconnect the AC adapter and install the charged battery pack.
7.
Make sure that the battery pack supplies power when you turn on the
computer.
If you suspect a power problem, see the appropriate one of the following power
supply checkouts:
• “Checking the Computer AC Charger” on page 21
• “Checking the internal battery status” on page 22
Checking the Computer AC Charger
When you use the computer AC Charger to charge the tablet but no power is
charged, see the instructions in this topic to check the computer AC Charger.
To check the computer AC Charger, do the following:
1.
Disconnect the micro-USB cable from the tablet.
2.
Measure the output voltage across the connector marked B of the micro-USB
cable. Refer to the following figure:
Note:
The output voltage across pin 3 of the micro-B connector might be
different from the one you are servicing.
3.
If the voltage is not correct, replace the micro-USB cable.
4.
If the voltage is acceptable, replace the system board.
Power system checkout
Pin
Volta
g
e (V dc)
1
Ground
2
0
3
+5
1 2
3 (5V)
Summary of Contents for TAB 2 A10-70
Page 1: ...Lenovo TAB 2 A10 70 Hardware Maintenance Manual ...
Page 4: ......
Page 5: ......
Page 43: ...Lenovo TAB 2 A10 70 37 Figure 3 3 The removed rear camera ...
Page 51: ...Lenovo TAB 2 A10 70 45 Figure 6 3 The removed vibrator motor ...
Page 53: ...Lenovo TAB 2 A10 70 47 Figure 7 3 The removed microphone ...
Page 59: ...Lenovo TAB 2 A10 70 53 Figure 9 4 The removed left speaker ...
Page 68: ...Lenovo TAB 2 A10 70 Hardware Maintenance Manual 62 Figure 11 5 The removed side key FPC ...
Page 77: ...Lenovo TAB 2 A10 70 71 ...
Page 79: ...Lenovo TAB 2 A10 70 73 17 Lenovo TAB 2 A10 70 battery pack SB18C00020 SB18C00021 N ...