[ARC Tech-109]

Do you have the camera CCU mode enabled? switch on back plus check the switch settings on the encoder (last board) on the inside. They don't need any sync to make them light up the particular port and if the composite output is working I'd look at the cable connections inside both the camera, CCU and the cable ends themselves. I don't recall if the CCU does the encoding of the R/G/B to composite internally or if it just passes the camera thru with these. I had the DXC-M3A set up for EFP to a BVU-150 and later to a BVW-35 so I never had much call to use the CCU for these.