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 YOGA Tab 3 YT3-850F
Page 1: ...YOGA Tab 3 8 Hardware Maintenance Manual Lenovo YT3 850F Lenovo YT3 850L Lenovo YT3 850M ...
Page 33: ...Lenovo YT3 850 29 ...
Page 52: ...Lenovo YT3 850 Hardware Maintenance Manual 48 Figure 3 10 The removed rotated camera ...
Page 69: ...Lenovo YT3 850 65 Figure 8 3 The removed vibrator motor ...
Page 77: ...Lenovo YT3 850 73 Figure 10 6 The removed USB and volume key FPC ...
Page 79: ...Lenovo YT3 850 75 Figure 11 3 The removed volume key ...
Page 84: ...Lenovo YT3 850 Hardware Maintenance Manual 80 Figure 13 6 The removed antenna ...
Page 88: ...Lenovo YT3 850 Hardware Maintenance Manual 84 Figure 15 5 The removed antenna ...