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Chapter 6: Troubleshooting
6.5 Analog Audio
Table 6-5. Analog audio troubleshooting.
Diagnosis
Possible Reason
Measure
CON unit: No signal at audio output
No audio connection to CPU/audio source
• Connect analog audio source.
• Check audio cable.
No signal
• Switch analog audio source on.
• Activate analog output at CPU/audio source.
No audio connection to audio sink (for example,
speakers)
• Connect analog audio sink and switch it on.
• Check connection of audio cable.
CPU unit: No signal at audio output (microphone)
No audio connection to audio source (microphone)
• Connect analog audio source (microphone).
• Check connection of audio cable.
No signal
• Switch analog audio source on.
• Activate analog output at audio source.
No audio connection to audio sink (for example, CPU)
• Check connection to CPU.
• Check connection of audio cable.
• Check audio configuration.
6.6 Digital Audio
CPU module, rear view
CON module, rear view
Figure 6-3. Digital audio module.
Table 6-6. Digital audio upgrade module troubleshooting.
Diagnosis
Possible Reason
Measure
CPU unit: LED 1 red
No audio connection to CPU/audio source
• Connect digital audio source.
• Check connection of audio cable.
No signal
• Switch digital audio source on.
• Activate digital output at CPU/audio source.
CON unit: LED 1 red
No audio connection to audio sink (for example, speakers)
• Connect digital audio sink.
• Check connection of audio cable.
No signal
• Check signal at CPU unit.
No signal/LEDs 1 OK
Digital silence at active audio source
• Check LEDs at CPU unit.
• Check audio format.
• Change audio input.
