Tuesday, April 19, 2016

Lenovo YOGA Tab 3 8 – Disassembling procedure – How to test the charge – How to test the battery – How to remove the case – How to remove the battery – Tablet repair and service

Category: Tablet Repair and Service 

Contents of this article 

  • How to test the battery charger Voltage 
  • How to remove the case 
  • How to remove the battery 

Lenovo YOGA Tab 3 8

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”
“Checking the internal battery status”
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.
Checking the internal battery status
To check the battery status of the tablet, do either of the following:
Approximate information about the battery status 
Get the approximate status of the battery at any time by checking the battery status icon on the system bar in the upper-right corner of the screen. The
shorter the green bar is, the less the battery power remains.
Accurate information about the battery status
To get the accurate information about the battery status of the tablet, do the following:
1. Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
From the main Home screen, touch the Android Settings icon on Lenovo Launch Zone. The Android Settings screen is displayed.
Pull down the application icon from the action bar and then touch Settings. The Android Settings screen is displayed.
2. Touch Battery in the Device section on the Android Settings screen.
3. The accurate percentage of the remaining battery power is shown on the screen.
How to remove Rear cover
1. Open the hinge frame.
2. Remove the card slot cover.
3. Remove screws 1 on the rear cover as shown in the figure below.
4. Hold the tablet in one hand and use a triangle paddle to unlock the rear cover
from the top middle of the tablet along the joint line as shown in the figure
5. Slowly remove the rear cover.
How to remove Battery pack
1. Remove screw 1 on the metal piece for fastening the battery and camera FPC as shown in the figure below.
2. Remove the metal piece.
3. Slowly pull out the hinge pivot using a pair of tweezers.
4. Detach the battery pack at the left end, turn the battery pack clockwise around its right end so as to steer the battery FPC out through the supporting frame at the right end, and then remove the battery pack from the main body of the tablet.