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724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 45
ACX1MT
Chapter 6: Troubleshooting
6.4 Analog Audio Upgrade Module
Table 6-4. Analog audio upgrade module 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.
6.5 Digital Audio Upgrade Module
CPU module, rear view CON module, rear view
Figure 6-3. Digital audio upgrade module.
Table 6-5. 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.