Here is a short video to demonstrate how to adjust the volume in your headset on the copilot side. I called the people that install the avionics for Cessna and who installed the TDFM in our airplane and they explained to me that the copilot side is unique and that you control your volumes through your audio panel and ICS volume knobs.
I think the video will explain and show in an understandable way how to adjust the volume in your headset. If you have further questions either respond to this email or give me a call. The only caveat is I have not put my headset on yet to try this but it appears to work.
