Be sure to add me to your favorites list DTXPress III DTXP3 Drum Trigger Module Original Overall Circuit Block Diagrams in Cover. Original Yamaha set of overall circuit diagrams for the Yamaha DTXPress III / DTXP3 Drum Trigger Module. This is the large overall circuit diagrams, and the Block diagram, tucked into an original Yamaha service envelope with holes on one side of it for placing it into a binder if you wanted to do so. Used but very good to near like new condition. These are original documents from Yamaha, from 2003, printed in Japan! Check out my Store! This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thank you so much for looking! This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thank you so much for looking!