Tutorials, FAQs, knowledge bases, video instructions, resource files, specifications. It is all here.
And some links even point to files to download and to use directly in your keyboard.
At the listed sites you can find any relevant information applying to all/more models within the Yamaha Tyros, PSR, CVP, DGX and YPG range of keyboards.
Yamaha
My Articles
PSR 740 Corner
• PSR Tutorial
• Yamaha's Online Services Blog
• Yamaha Zone - Resources
• TyrosMania
• PSR FAQ
• Wally's Yamaha Tyros 3 Pages
• Arranger Workstation - Behind the Manual
• Yamaha Club
• Darren's Tyros 4 Site
Old Pages
• Yamaha Personal Keyboard Owner
• Synth Zone Arr. Keyb. Forums (Old)
• Chris Hansen's Arr. Keyb. Discus. (Old)
• Yamaha Corporation Websites (Old)
• 119000+ PSR Videos
• 97000+ Tyros Videos
• 26000+ DGX Videos
• 4000+ YPG Videos
• 3000+ CVP Videos
Instructions
• DVD: Playing with Styles
• Tutorials for Yamaha Keyboards
• Drawbar Settings
• BiaB plays the Keyboard
System Exclusive Messages (SysEx)
• Changing Effects using SysEx
• SysEx Documents and Specifications
• Style Files - Introduction and Details
• Song & Style Datenbank online
• How to connect Keyboard to PC/Mac
XG
• YAMAHA XG Lessons
• XG Creative Synthesis: #1 -
#2 -
#3
• Introduction Yamaha XG
• XG Documents and Specifications
Misc. Sites
• Sheet - MIDI - Style
• Songs for Yamaha Keyboard
• PSR 740 Corner
• Other Keyboard Brands
• Style Files
• Yamaha: Music Database Libraries
• PSR Tutorial - Music Finder Databases
• Instrument Definition Files
• TVN & UVN Voices for Tyros
Non-English Resource Sites
• 
Yamaha-arranger.dk
• 
Heiko: PSR, MIDI, XG & XF
• Sound Wonderland
• Heidrun's Musikerseiten
• Robby's Resources
• Clemens' MIDI & PSR Site
• Michel Vonken Page