Black Box ACX1MT Troubleshooting, Analog Audio Upgrade Module, Digital Audio Upgrade Module, Page

Chapter 6: Troubleshooting

6.4 Analog Audio Upgrade Module

Table 6-4. Analog audio upgrade module troubleshooting.

Diagnosis	Possible Reason	Measure
		• Connect analog audio source.
	No audio connection to CPU/audio source
		• Check audio cable.
		• Switch analog audio source on.
CON unit: No signal at audio output	No signal
		• Activate analog output at CPU/audio source.
	No audio connection to audio sink (for example,	• Connect analog audio sink and switch it on.
	speakers)	• Check connection of audio cable.
	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.
CPU unit: No signal at audio output (microphone)
		• Check connection to CPU.
	No audio connection to audio sink (for example, 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
		• Connect digital audio source.
	No audio connection to CPU/audio source
		• Check connection of audio cable.
CPU unit: LED 1 red
		• Switch digital audio source on.
	No signal
		• Activate digital output at CPU/audio source.
	No audio connection to audio sink (for example, speakers)	• Connect digital audio sink.
		• Check connection of audio cable.
CON unit: LED 1 red
	No signal	• Check signal at CPU unit.
		• Check LEDs at CPU unit.
No signal/LEDs 1 OK	Digital silence at active audio source	• Check audio format.
		• Change audio input.

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