Saturday, March 26, 2016

Lenovo A8-50 - A5500 – Android Tablet – Charged testing – Disassembling procedure – How to remove the battery – Tablets repair and service

Category: Tablets repair and service 

Contents of this article 

  • How to check the AC adapter 
  • Check The battery status 
  • Disassembling procedure   

Lenovo A8-50 -A5500

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 AC Charger”
“Checking the internal battery status”
Checking the AC Charger
To check the 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.
Touch the application icon from the action bar and then touch Settings.
The Android Settings screen is displayed.
2.Touch About Tablet on the Android Settings screen.
3.Touch Status to view the accurate percentage of the remaining battery power. You also can touch Battery use to check what applications are consuming battery power.
DISASSEMBLING PROCEDURE 
Side door
Insert a finger to open the side door as shown in the picture.
Pull out the side door from its cavity.
Micro SD card and Micro SIM card
Insert a finger to open the side door as shown in the picture.
Press the SD card or SIM card to make it pop up.
Pull out the SD card or SIM card from its slot.
Back cover
Insert a finger to open the side door as shown in the picture.
Remove the screw 1
Insert the guitar pick and slide along to release the back cover.
Remove the back cover.
Power key and volume key
Lift up the power key and volume key as shown in the picture.
Battery pack
Insert the guitar pick to disconnect the connector as shown in the picture.
Insert a flat blade to detach the battery pack.
Remove the battery pack from its socket.