Thursday, March 05, 2015

LENOVO YOGA TABLET 10 HD+ DISSEMBLING AND CHARGER TESTING

LENOVO YOGA TABLET 10 HD+ 


DISSEMBLING AND CHARGER TESTING 

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.
DISASSEMBLING
 Rear cover
1. Open the hinge frame and then remove the card slot cover of the tablet using a thin flat blade or guitar pick

2. Remove screws 1  on the rear cover as shown in the figure below.

3. Separate the top right corner of the rear cover from the main body of the tablet using a suction tool as shown in the figure below.

4. Move the suction tool to the left along the upper edge to unlock the entire upper edge of the rear cover from the main body.


5. Attach the suction tool to the areas as shown in the figure below to disengage the three locks inside the rear cover.

6. Slowly remove the rear cover

Right speaker
1. Disconnect the power supply to the tablet by detaching the battery FPC from its connector on the main board using a guitar pick.

2. Unlock the FPC connector of the right speaker on the sub board using a guitar pick.

3. Pull out the FPC of the right speaker from its connector using a pair of tweezers.

4. Remove screws 1 on the holder of the right speaker as shown in the figure below.

5. Remove the holder of the right speaker


6. Lift one end of the right speaker using a thin flat blade and at the same time push the right speaker on the other end in the direction as shown in the figure below.

7. Remove the right speaker.

Battery pack
1. Disconnect the battery FPC from its connector on the main board using a guitar pick.

2. Slowly pull out the hinge pivot using a pair of tweezers until about half the pivot length moves out.

3. Detach the hinge frame at the left end, turn the hinge frame 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 hinge frame from the main body of the tablet.


4. Peel off the foil on the battery cover at the FPC end of the hinge frame

5. Remove screw 1 on the battery cover as shown in the figure below.

6. Remove the battery cover as shown in the figure below.

7. Remove the battery pack from the hinge frame.


8. Remove the hinge pivot by pushing it on the right side