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Speaker replacement for intercom panel EXTEL WAVE 2

Visitors can't hear you, or intercom panel doesn't make a sound when you press call button. The loudspeaker on your intercom panel seems to be malfunctioning. Before carrying out any work or maintenance, please switch off all components of your video door entry system and place yourself on a suitable surface to avoid scratching the lens.

This tutorial is applicable for:

Extel - 720321 - Wave 2

Difficulté : Moderate

Temps nécessaire : 30 minutes

Nombre d’étapes : 6

Mise à jour : February 2025

Materials needed:

Phillips screwdriver, BTR 1.5mm, plastic spatula, precision pliers

Tutorial steps:

Step 1: Remove front panel and battery

Position your intercom panel to gain access to the underside.
Use the 1.5mm BTR screwdriver to tighten the safety screw.
Turn the screwdriver anti-clockwise to tighten the safety screw.
ATTENTION: The safety screw uses a left-hand thread.

Insert the 1.5mm BTR screwdriver into the left-hand slot.

Lever up to remove the front panel.

Set the ON/OFF slider to OFF.

Remove the battery by pulling it downwards.

Step 2: Remove the back panel

Turn the intercom panel over and, using a Phillips-head screwdriver, remove the 6 screws at the rear of the intercom panel.

Step 3: Dismantling the circuit board

Carefully disconnect the microphone connector by pulling it upwards with precision pliers. Be careful not to pull on the wires.

Unscrew the 4 screws holding the intercom panel to gain access to the bottom connectors.

Use the plastic spatula to gently lift your PCB out of its housing.
1- Carefully disconnect the speaker connector
2- Carefully disconnect the connector from the call button
3- Carefully disconnect the infrared LED connector

Tilt the circuit board to the left to gain access to the antenna.

Step 4: Replacing the microphone

Use a heat gun or hair dryer to heat the microphone housing area.
WARNING: limit heating to 200°, as there is a risk of damaging the microphone support.
Pull slightly on the microphone wire while heating.
Wait 5 minutes before manipulating the intercom panel or reinstalling the new microphone.

Step

Make sure the microphone is identical to the original and install it in its housing.
If the microphone doesn’t fit into its housing, glue it in place using a special, non-aggressive glue (e.g. B-7000).

Step 5: Reassembling the circuit board

Temporarily reposition the circuit board on the chassis.
Ensure that the battery connector seal is correctly positioned
First, reconnect the lower connections:
1- Speaker
2- Call button
3- Infrared LEDs

Make sure the antenna wire is positioned on the left side of the chassis and reinstall the circuit board.
To aid positioning, guide holes are provided on the circuit board.

Make sure the ON/OFF switch on intercom panel is easily accessible.

Make sure the antenna wire is always correctly positioned and not twisted or pinched.
Using a Phillips screwdriver, tighten the 4 screws holding the circuit board in place.

Reconnect the microphone.

Step 6: Reassembling the door station

Turn the intercom panel over and, using the Phillips screwdriver, screw back the 6 screws at the rear of the intercom panel.

Reconnect the battery. Pay attention to the direction of insertion.
Switch to ON position.
Don’t forget to reassociate the monitor and intercom panel.
Test short-range operation before final reinstallation.