Sunday, June 5, 2016
Lenovo yoga tablet 8 B8000 – Disassembling procedure – How to remove the rear cover – How to test the AC adapter – Tablet repair and service
Category: Tablet repair and Service
Contents of this article
- How to test the charger
- How to remove the case
- How to check the battery status
Lenovo yoga tablet 8 B8000
How to verify power system
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 IdeaTab AC Charger”
“Checking the internal battery status”
Checking the IdeaTab AC Charger
When you use the IdeaTab AC Charger to charge the tablet but no power is charged, see the instructions in this topic to check the IdeaTab AC Charger.
To check the IdeaTab 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:
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 IdeaTab AC Charger”
“Checking the internal battery status”
Checking the IdeaTab AC Charger
When you use the IdeaTab AC Charger to charge the tablet but no power is charged, see the instructions in this topic to check the IdeaTab AC Charger.
To check the IdeaTab 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:
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 right side of the action bar and then touch the Settings icon. 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, as well as applications that are consuming battery power, are shown on the Battery 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 right side of the action bar and then touch the Settings icon. 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, as well as applications that are consuming battery power, are shown on the Battery screen.
DISASSEMBLING PORCEDURE
How to remove Rear cover
1. Peel off the label in the recess of the rear cover
1. Peel off the label in the recess of the rear cover
2. Remove three screws 1 in the recess 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, and then move the suction tool to the left along the upper edge to unlock the entire upper edge from the main body.
4. Hold the main body of the tablet with one hand and pull out the right edge
of the rear cover from the main body using another hand.
5. Attach the suction tool to the center right area of the rear cover to separate this area from the main body and then move the suction tool to other two positions as shown in the figure below to unlock the entire central area of the rear cover
5. Attach the suction tool to the center right area of the rear cover to separate this area from the main body and then move the suction tool to other two positions as shown in the figure below to unlock the entire central area of the rear cover
6. Unlock the left edge of the rear cover in the same way as described in step 4 above.
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