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Shenzhen Walida After-sale Service Department
Replace speaker
Check speaker
Replace PCB
If FPC is normal
Check U100
Replace PCB
After –sale
repairing process for "No sound"
No sound from speaker?
MP3 has no sound or no
receiving voice？
Confirm which channel has no
sound
All channels have no sound
If FPC is normal？
Check U200and U201
Replace PCB
SG3318 Trouble shooting and maintainence
Technical
If FPC is normal
Replace speaker
Replace PCB
Replace corresponding speaker
Replace FPC or check B400
Replace FPC or
check B400
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