Here's brief solution for a hardware relalated microphone failure on
Nokia 7510s. this solution simply shows the location of microphone
components location on the PCB board that might get damaged if the
microphone failed to have an audio sound output during transmission.
The
7510 supernova used a digital microphone components mounted located at
the bottom side of the PCB, It composed of 5 terminal which is for the
connection of the supply voltage, data signal output, clock signal and
groundings. The picture above shows each of the corresponding terminal
connection which feeds from or to a chip resistors. This resistors has a
resistance value of 100 ohms each.
Hints for repair: check the supply vdd supply voltage, this voltage came from a VSIM second voltage; Look for the vsim voltage location capacitor on the vsim circuit, the other side of that capacitor is where the supply voltage for the microphone came from. Check all the resistors resistance value, replace it if the desired reading of approximately 100 ohms meet. Replace a new microphone if all of the above mention is working fine.
Nokia 7510s mic problem solutions
Nokia 7510s supernova insert sim card problem solution
Hints for repair: check the supply vdd supply voltage, this voltage came from a VSIM second voltage; Look for the vsim voltage location capacitor on the vsim circuit, the other side of that capacitor is where the supply voltage for the microphone came from. Check all the resistors resistance value, replace it if the desired reading of approximately 100 ohms meet. Replace a new microphone if all of the above mention is working fine.
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