Friday, December 16, 2016

Envizen V100M – Disassembling procedure - How to replace the LCD Screen


Remove the two screws on the side of the tablet that hold the back cover in place using the screwdriver.
The screws for the back cover are: 1.5mm diameter x 3.5mm long
When doing any work on electronic devices, always use an anti-static wrist strap!
With the prying tool separate the back cover from the rest of the device.
The speakers are attached to the back cover and motherboard assembly so remove carefully.
Remove the non-conductive tape that is on the battery and motherboard assembly.
Slide the spudger under the battery.
Pry the battery up, and work your way down the side of the battery, releasing it from the adhesive holding it down.
Be careful not to deform or puncture the battery when prying it out, as it could cause a fire.
Carefully pull the battery out of the Envizen V100M.
Remove the solder from the wires connecting the battery to the motherboard 
Remove the soldered wires with the tweezers. If this does not work you are going to have to heat up the solder in order to remove the wires
Remove the power to the LCD screen. This is a matter of removing the grey wire and white wires that are soldered to the motherboard.
Note the orientation of the grey wire and white wire. The location of each wire is VERY important.
Remove the five screws holding the motherboard assembly down using the screwdriver
These screws are also 1.5mm in diameter and 3.5mm long
Remove the three ribbon cables from their couplings.
Using the prying tool gently push the bracket up, allowing for the cable to right out.
Remove the solder holding the white ribbon cable in place.
Then flip the motherboard over to access the screws for the rear facing camera.
Be very careful that you doe not tear the wires for the camera. gently flip the motherboard making sure to not stress out the wires.
Unscrew the camera from the back of the motherboard using the screwdriver.
Gently push on the black plastic bracket holding the camera in place. The bracket should pop right out.
The screws for mounting bracket are also 1.5mm diameter and 3.5mm long.
Now the motherboard is completely removed from the tablet.
Place the motherboard in a static-free location
Remove the three ribbon cables from their couplings
Using the prying tool gently push the bracket up, allowing for the cable to right out.
Remove the solder holding the white ribbon cable in place.
Then flip the motherboard over to access the screws for the rear facing camera.
Be very careful that you doe not tear the wires for the camera. gently flip the motherboard making sure to not stress out the wires.
Unscrew the camera from the back of the motherboard using the screwdriver.
Gently push on the black plastic bracket holding the camera in place. The bracket should pop right out.
The camera is then free from the motherboard assembly and can be replaced.
The screws for mounting bracket are also 1.5mm diameter and 3.5mm long.
Remove the six brackets around the outside of the LCD screen using the screwdriver
The 12 screws holding down the mounting brackets are 1.5mm in diameter and 2.8mm long
The LCD can now be removed from the plastic tablet housing.