I have a Numark DM 1900 in service right now. I have owned it since the 1980's. It handles two Technics turntables, two Sony CD players, an Onkyo CD recorder/player and an Akai reel-to-reel (10") tape drive quite well. It has served me well.

I would like to have some minor technical fine-tuning done. Does anyone know if there is a service manual available anywhere?