Checking Accessory USB Unit (AUU): Information: Overview

The fault may be caused by:

• Malfunction in external sound source.
• Faulty software.
• Loose connections in leads.
• Internal fault in the Accessory USB unit (AUU).

Remedy in the following order. 

Check function of the external sound source.

Load the Accessory USB Unit (AUU) with new software.

• Continue 

  Refer to VERIFICATION 

Remedy in the following order. 

• Check the connectors and cables. Check especially the USB-connection for loose connection.

Other information: 

• see SIGNAL DESCRIPTION
• see COMPONENT LOCATION
• see UNIVERSAL SERIAL BUS (USB) MODULE

• Continue 

  Refer to VERIFICATION 

Replace Accessory USB Unit (AUU).

Other information: 

• see SIGNAL DESCRIPTION
• see COMPONENT LOCATION
• see UNIVERSAL SERIAL BUS (USB) MODULE

• Continue 

  Refer to VERIFICATION