Disassembly/Repair of the mobile device Huawei Y7 (2019) (Huawei Y7 2019 DUB-LX1) with each step description and the required set of tools.

Use the ejection tool (aka Needle) or Paperclip. Push the tip all the way into the hole until the tray ejects, and then pull the tray of SIM and Memory card (Micro SD) out.

⚠️️ Pay attention! The tool must be inserted into a hole on the edge of the phone's housing. Do not press too hard. It may break the tray eject mechanism.

Using a spudger or a plastic pick, carefully, around the edge, detach the back cover clips, and remove it.

Do not insert the tool deeply or bend it. Otherwise, the housing may be tampered with or damaged.

⚠️️ Be careful when opening the cover from the volume and power buttons side. Thin cable and fragile buttons are straightforward to damage.

⚠️️ Pay attention to the fingerprint sensor cable located on the inside.

Pry up the fingerprint sensor connector and remove the back cover.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the seven screws.

Pry over the edges and remove the cover hiding the motherboard.

Disconnect the battery connector as soon as possible. It is better to use a non-metal or plastic tool to avoid any damage.

ℹ️️ The Huawei Y7 (2019) model has a battery HB406689ECW with 4000 mAh capacity (aka rechargeable battery).

⚠️️ It is highly recommended to disconnect the connector to avoid possible short circuits during disassembly.

Pry up the connector and remove the fingerprint sensor cable.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the four screws.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the three short screws.

Pry over the edge and remove the loudspeaker assembly.

Carefully, preferably from the edge, disconnect the connectors and remove the inter-board cable connecting the mainboard to the daughterboard (also known as the sub-board).

⚠️️ Be careful when removing the cables from the connectors, the cables are pretty thin, and it is easy enough to break them or damage the contact tracks inside.

ℹ️️ An arrow on the FFC cable (flexible flat cable) indicates its correct position.

Disconnect connectors and remove the coaxial cable.

Remove the sub-board. It may be glued to the frame or attached with attachments like latches or hooks, so be careful.

ℹ️️ The sub-board contains a charging port (Micro USB), microphone, spring contacts for the speaker, vibration motor, and an antenna unit.

⚠️️ It is not necessary to insert the tool underneath when removing the sub-board. Internal components could be damaged.

Pry up the display module connector.

Disconnect the connector on the motherboard, and remove the front (selfie) camera.

Disconnect connectors on the motherboard, and remove the two rear cameras assembly.

Using a screwdriver (Phillips 1.5 mm PH000), unscrew one screw securing the motherboard.

Carefully remove the printed circuit board. There is no need to use a lever or try to reach the circuit board by force. Make sure that nothing is getting in the way or holding the circuit board.

The motherboard, also, may be attached with attachments like latches or hooks, be careful.

⚠️️ Do not bend the circuit board when removing it or push tools under it. Unbeknownst to yourself, you can damage components or cables from the inside.

Pry at the edge and remove the small board with sensors.

Pry at the bottom and remove the earpiece speaker.

⚠️️ Be careful! The earpiece speaker is glued a bit with adhesive.

⚠️️ If we pry the speaker in the middle we may break the earpiece speaker in half.

Pry at the bottom and remove the vibration motor.

⚠️️ Be careful! The vibration motor is glued a bit with adhesive.

ℹ️️ In the display frame remained: the battery.