3. Audio errors
YES
Is the voltage output specified below
available at each pin of the PA connector
in the AUDIO PWB?
Pin_NO Name Voltage
1 S+12
12Vdc
2 S+12
12Vdc
3 S+12
12Vdc
4 GND
GND
5 GND
GND
6 GND
GND
The power unit or the PA
connector is fault.
NO
NO
YES
Is the waveform specified below output to
the AU connector of the AUDIO PWB?
Pin6
Pin7
Pin5
Pin 1,3 • • • Audio signal waveform
NO
The AUDIO PWB is fault.
YES
The speaker or the speaker
cable is fault.
In the state that the speaker cable is
disconnected, is the audio signal output
available at the speaker terminal?
5Vpp
5Vpp
3.5Vdc
The MAIN PWB or the AU
connector is fault.
(Caution)
In regard to the method of audio input setting, refer to the specifications and the instruction
manual to confirm that all the setting is free from errors. Since then, troubleshooting can be
carried out. It must be noted that the protector functions and no audio output is available if
the opposing electrodes of the speaker output or the speaker output and the ground (GND)
are short-circuited. In such a case, turn off the main power supply and make the
connections correctly. The protector is reset when the main power supply is turned on after
that
Audio errors
CONFIDENTIAL
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