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Only for training and service purposes
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4. TROUBLE SHOOTING
4.18 Speaker phone path
QSC6240 LINE_OUT_R_N,LINE_OUT_L_P
Æ
C519,C520(DNI)
Æ
Audio Sub System(IC500)
Æ
FB501,FB502
Æ
CN501
Æ
Speaker
Start
Connect the phone to network
equipment and setup call
Setup 1KHz tone out
Sine wave appears at
FB501,502?
Change the Speaker
YES
Sine wave appears at
C519,C520?
Change the Main board
Check the Audio Sub System
YES
NO
NO
Change the Main board