Q4202 L2 Service Manual
NO.
Description
Reason
Solution
1
Receiver
The volume to shut down
Press V +, transferred to the suitable volume
Dust with receiver
Clean receiver
Receiver issue
Change receiver
Volume key issue
Change volume key
PCBA issue
Change PCBA/Refer to L3 repair
16
:
Earphone not working
NO.
Description
Reason
Solution
1
Single output
from earphone
Earphone issue
Change earphone
Earphone jack smudges
Clean up the earphone jack
Earphone jack pin is weld weak
Strong weld the jack pin
Earphone jack is fail
Change earphone jack
Main PCBA fail
Change main PCBA/Refer to L3 repair
17
:
MIC not working
NO.
Description
Reason
Solution
1
Mic
Setting issue
Open the vibration function
Soldering issue
Re-soldering Mic
Soldering issue
Re-soldering Main FPC
Main FPC connect fail
Change Main FPC connect
Receiver connector
Ear phone connector