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Checking Flow
SETTING : "Ringers" at Sounds menu
START
NO
Check the connection of speaker, rework or
Does Speaker work Properly?
replace the speaker
Yes
NO
Re-soldering or
Replace the U308, U309
Check the signal level at pin4 of U308,U309
Replace QSC6010 or board
Yes
NO
Signal from
Replace QSC6010 or board
U308,U309 pin1
Yes
Speaker will work properly
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