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Checking Flow
SETTING : "Ringers" at Sounds menu
START
NO
Check the contact of speaker or
Does Speaker work Properly?
Replace the speaker
Yes
NO
Replace QSC6010 or board
Signal from U305,U306 pin1
Yes
NO
Check the signal
Re-soldering or
level at pin4 of
Replace the U305, U306
U305,U306
Yes
Speaker will work properly
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