Hey! I am the owner of Tyros 5. There are many problems with this model and I have many wishes to fix them. Many questions for the Yamaha Expander. How to contact tech support Yamaha?
Contact your regional Yamaha office (Customer Support) — you can start by finding their address/phone by looking in the very back of your Tyros 5 Owner’s Manual (last page) — there you will find all the Yamaha worldwide distribution centers. Find the one nearest you
Or you can go to the corporate website: www.Yamaha.com
“Select Your Location” (where in the world you live)
Follow the headings to Musical Instruments... to Arranger Keyboards and/or Digital Workstations.
This particular site (YamahaSynth.com) is strictly for Yamaha Synthesizers and Stage Keyboards, you want to get in touch with the Department concerned with Arranger Keyboards / Digital Workstations.
Just FYI: Tyros 5 has been discontinued since 2017