Don't know if you received an answer to your original post, but here are a couple of numbers to try in searching for answers.
Thor RV 1-877-855-2867 or AXXERA 1-866-382-5476
Good luck, we have the same issue and I am in search of the manual for the AXXERA AV615BH radio/DVD player. The company tried to argue with me that we must have a BHM, but I took a picture of the unit in our RV and it clearly shows a BH. Waiting for the dealership to provide a manual to us.
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