Nokia C3-01 Buzzer, Hands Free Loud Speaker Problem Solution

Nokia C3-01 Buzzer, Hands Free Loud Speaker Problem Solution

Repair hints for Nokia C3-01 Buzzer speaker problem:
1. Check/replace the IHF speaker.
2. Clean the Speaker terminal contact pads on the PCB board.
3. Check all the filter coils. replace if necessesary.
4. Trace the Speaker+ and Speaker- line paths, mend to reconnect if found open or cut.
5. Check the VBAT 3.7V across the Inductor coil and 0 ohms resistor.
6. Check/replace the inductor coil and 0 resistor.
7. Rework/replace the Audio controller IC.