Nokia 1680c,1681c MIC Problem Solution with Jumper Ways

Here's the Nokia 1680c and 1681c Solution for not working mouthpiece or microphone problem. This solution shows the connection line paths of the device MIC's circuit for easy troubleshooting or repair.

To fix MIC problem on Nokia 1680 and 1681 classic, you may first check the microphone module using a multimeter - to confirm if it's still working or not. You may also clean the MIC's terminal contact pads if there's an oxidation build up found.

If the microphone seems okay and the contact pads is cleaned but the problem still exists, refer to the solution below and check the connected components to it and trace also its connection line paths.

Nokia 1680c and 1681c MIC Connection Line Paths

You may check and replace all the corresponding filter resistors and capacitors. If all the resistors had been check and or already been replaced but doesn't fix the problem, check the MIC Bias Voltage, if the voltage is missing,. The possible faulty is the UEM IC, reworking it might only fix the problem.

Nokia 1680c and 1681c Earpiece Receiver Speaker Problem Solution

This is the Nokia 1680 and 1681 classic solution for not working Earpiece Speaker problem. This solution provides the connection line paths of the receiver speaker that is may useful for an easy repair procedure.

Here's a simple instruction on how to diagnose and fix the receiver speaker problem: First check the receiver speaker for possible damaged, replace if its already busted. Clean the speaker terminal contact pads, an oxidation or corrosion build up may also cause the problem. Then refer to the solution below if the above basic procedure doesn't fix the problem.

Nokia 1680c and 1681c Earpiece Speaker Connection Line Paths

Check and replace the filter coils and capacitors, trace also its connection down to the terminal contact pads.
If those components were okay and the lone paths is good. Try to reheat the UEMCLIT chip, rework or then replace if necessary.

Nokia 1680c,1681c Ringer or Hands Free Speaker Problem Solution

This is the Nokia 1680c and 168c solution for not working ringer or hands free speaker problem, that result to no ringtone or loud speaker sound can be heard on the device.

This solution below shows the connection line paths of the hands free speaker for easy troubleshooting and repair. But to fix a speaker failure, you may first check the speaker using a multimeter to easily confirm if its still working or already damaged. If the speaker is okay, clean the speaker terminal contact pads and locate the components shown on the solution below, then do a check an replacement procedure.

Nokia 1680c and 1681c  Speaker Problem Solution

First check the filter coils and the ESD protection diodes on each speaker polarity connections, then replace if found damaged. Trace also each corresponding connection from the speaker terminal pads down to the components where it is being connected.
The circuit used a AUDIO AMPLIFIER chip, to boost the sound loudness. You may also check and replace this said chip, but first check the battery supply voltage of that chip before attempting to replace it.

Nokia 1680c and 1681c Headset Not Detected Problem Solution

Here's the solution for Nokia 1680c and 1681 headset not detected problem. If encountered and try to fix this problem, you may refer to the solution below and check the highlighted components.

If the device won't detect any headset being plug-in to it, you may first check the headset pin connector for possible damaged. Then check and replace those highlighted components on the following solution below.

Nokia 1680c and 1681 headset not detected solution

Try to replace the 100K resistor  and 1u0 capacitor, this components holds the headset detection mechanism. You may also use this solution if the device always showed the headset icon even the headset is not plug-in