Redmi Note 9 Pro Loudspeaker Replacement
This repair guide is for replacing the loudspeaker in a Xiaomi Redmi Note 9 Pro smartphone.
- You will require replacement adhesive for reattaching parts during the reassembly process.
Step 1 | Heat the rear glass
Excessive heat can damage the display and internal battery.
- Prepare an iOpener and apply it to the rear glass for at least two minutes.
- Alternatively, use a hair dryer, heat gun, or hot plate to loosen adhesive, but monitor temperature closely.
Step 2 | Insert an opening pick
Attach a suction handle to the rear glass's bottom edge, as close to the edge as possible.
If the rear glass is cracked, the suction handle may not stick; try using strong tape or superglue it in place and let it cure before proceeding.
- Lift the rear glass with the suction handle to create a small gap between the back cover and frame.
- Apply more heat if needed, following iOpener instructions to avoid overheating and creating trouble.
Insert an opening pick into the created gap.
- Slide the opening pick to the bottom right corner to slice the adhesive.
- Leave the opening pick in place to prevent resealing of the adhesive.
Step 3 | Slice the adhesive
- Insert a new opening pick at the phone's bottom edge.
- Push the opening pick towards the bottom left corner to break the adhesive.
Leave the picks in place to prevent re-adhesion.
Step 4 | Slice the adhesive
Adhesive may harden during use, requiring reheating.
- Reheat the adhesive with the iOpener for one to two minutes.
- Insert a third opening pick at the bottom left corner of your phone.
- Slide the opening pick along the left edge to slice the adhesive.
- Leave the pick in the top left corner to prevent resealing.
Step 5
Insert a fourth opening pick under the top left corner of your phone.
- Slide it along the top edge to slice the adhesive.
- Leave the opening pick in the top right corner to prevent resealing.
Step 6
Insert the fifth opening pick into the top right corner.
- Slide it along the right edge of the rear glass, slicing through the remaining adhesive.
Step 7 | Remove the rear glass
Remove the rear glass.
- Clean the area with isopropyl alcohol (>90%). Apply new adhesive as needed.
- Secure the rear glass using pre-cut adhesive or double-sided adhesive tape.
- Apply steady pressure to your phone for several minutes after installation. You can use a stack of heavy books for support.
Step 8 | Unfasten the motherboard cover screws
Remove the motherboard cover using an eleven 3.9 mm-long Phillips screwdriver.
Step 9 | Pry up the motherboard cover
Insert the opening pick's tip under the left edge of the motherboard cover.
- Flip the pick sideways and gently pry up the motherboard cover
Step 10 | Remove the motherboard cover
Remove the motherboard cover using a pair of tweezers or your fingers.
Step 11 | Disconnect the battery cable
Disconnect the battery cable with a spudger by lifting the connector directly out of its socket.
Step 12 | Unfasten the loudspeaker assembly screws
Remove the Loudspeaker Assembly screws using a Phillips screwdriver.
- Seven screws are located.
- Each is 3.9 mm long.
Be careful not to strip the screw heads.
Step 13 | Pry up the loudspeaker assembly
- Insert an opening pick into the gap between the loudspeaker assembly and the battery.
- Pry up the loudspeaker assembly using the opening pick.
Step 14 | Remove the loudspeaker assembly
Remove the loudspeaker assembly.
- Reassemble by applying new adhesive to cleaned surfaces using a solvent like isopropyl alcohol (greater than 90%).