Here's the Nokia 2220 slide solution for not working ringer, buzzer or hands free speaker problem. This solution may help on how to troubleshoot and repair the phone handset.
To repair the Nokia 2220 slide hands free speaker, you may first clean the speaker terminal contact pads on the PCB board if there is a corrosion and oxidation build up., then check the speaker using a multimeter to easily determine if its working or not. Replace a damaged speaker if found. If the speaker confirmed okay, you may refer to the solution below and do have a check and test procedure on some components which is associated or connected with the hands free speaker circuit.
Nokia 2220 slide Hands Free Speaker Connection Line Paths
You may start checking up the filter coils in the circuit, then the ESD protection diode for possible damaged, and do a replacement if necessary. The hands free speaker used an Audio Driver IC, if these IC become faulty it will result to poor audio sound or no sound output over the speaker.
You may first check the supply voltage across to the capacitor., before attempting to rework or replace it.