Here's the Nokia E72 solution for Ringer, Buzzer or Hands Free Speaker Failure Problem that there is no ringtone or loud speaker when activated can be heard on the device.
To fix the speaker failure problem, you may need to check first the ringer speaker and ensure that the speaker terminal contact pads is clean or free from oxidation build up.
If the speaker is working fine and the terminal contact pads seems okay but still there is no sounds output over it. You may then proceed to check certain components on the Nokia E72 PCB board that where the speaker is being connected. This solution below shows the components and connection line paths of the speaker which is useful in troubleshooting or repair.
You may then check the filter coils in each polarity connection, Check the ESD filter chip and filter capacitors that also connected to it. You may replace this components if already damaged. If these components were both okay, the problem maybe lies on an open line connection paths. Trace it and managed to reconnect the said open or cut-off line paths.
For further troubleshooting, you may need to rework or replace the Audio IC if the problem is not found on the line paths and filter components. The Audio IC boost up the audio data signals before it feeds up to the ringer speaker. This option may help to fix Nokia E72 ringer speaker problem.
To fix the speaker failure problem, you may need to check first the ringer speaker and ensure that the speaker terminal contact pads is clean or free from oxidation build up.
If the speaker is working fine and the terminal contact pads seems okay but still there is no sounds output over it. You may then proceed to check certain components on the Nokia E72 PCB board that where the speaker is being connected. This solution below shows the components and connection line paths of the speaker which is useful in troubleshooting or repair.
Nokia E72 Ringer, Buzzer or Hands Free Not Working Problem Solution
You may then check the filter coils in each polarity connection, Check the ESD filter chip and filter capacitors that also connected to it. You may replace this components if already damaged. If these components were both okay, the problem maybe lies on an open line connection paths. Trace it and managed to reconnect the said open or cut-off line paths.
For further troubleshooting, you may need to rework or replace the Audio IC if the problem is not found on the line paths and filter components. The Audio IC boost up the audio data signals before it feeds up to the ringer speaker. This option may help to fix Nokia E72 ringer speaker problem.
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