Micromax Q452, Service Manual

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
Check Earphone connector also , If Earphone connector got shorted : MIC & Receiver will not work

Check the Power IC work normally or not. Re-Solder the
Power IC
or change it

Check the CPU normally or not, then Re-Solder CPU or change it.
13. Speaker not working:
Solution:

Flash the handset with latest SW

Check the Speaker bad or not, else change it.

Check Earphone connector also , If Earphone connector got shorted : MIC & Receiver will not work

Check the SPK FPC soldering quality , if not ,Re-sold it or change it.

Check the Main FPC Assembly Quality , if not ,Re-Assembly it or change it.

Check the FPC connector soldering Quality ,if not ,Re-sold it or change it.

Check the Power IC work normally or not. Re-Solder the Power IC or change it

Check the CPU work normally or not. Re-Solder the CPU or change it
Receiver
Slot
CPU
Power IC