Here's a solution for Not working ringer speaker on Nokia 6720 classic. This solution provides and shows the connection line paths of the left and right hands free speaker of 6720c.
You may first check the speaker assembly for possible damaged or already busted, then clean the terminal contact pads for possible oxidation build up. There are two ringer speaker used in the circuit, you may just trace each individual corresponding line connection line paths and components connected to it. Just refer to the solution below where to locate it on the PCB board.
If the speaker module is okay then the terminal contact pads were already cleaned but still the problem occurs, you may then check each of the corresponding filter coils and trace the connection line paths.
There are also some possibilities that the problem lies on the audio codec chip. Reworking or replacing it might only fix the problem.
You may first check the speaker assembly for possible damaged or already busted, then clean the terminal contact pads for possible oxidation build up. There are two ringer speaker used in the circuit, you may just trace each individual corresponding line connection line paths and components connected to it. Just refer to the solution below where to locate it on the PCB board.
Nokia 6720c Buzzer, Ringer or Hands Free Speaker Failure Solution
If the speaker module is okay then the terminal contact pads were already cleaned but still the problem occurs, you may then check each of the corresponding filter coils and trace the connection line paths.
There are also some possibilities that the problem lies on the audio codec chip. Reworking or replacing it might only fix the problem.
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