The No.1 Website for Pro Audio
Weird Yamaha DX9 Issue
Old 8th January 2017
Here for the gear

Weird Yamaha DX9 Issue

So I recently acquired a DX9 which is not entirely functional. It mostly makes weird static/sine noises. When I opened up the chassis I immediately noticed the 9.4265 MHz crystal resonator looked like it had leaked (I don't know if they can actually leak but there is suspicious brown/yellow residue surrounding it). I then checked the battery voltage and it read around 1 volt. When I power it on, the numerical display briefly reads "88" which according to another thread on this forum from years ago indicates a failed resonator. Ive never owned a DX9 before so I don't actually know what it is normally supposed to read. I have no problem replacing either of these parts myself. However, when I checked the battery voltage a second time, this time using the built in battery check function, it read 4.7 volts. How is this possible if the battery can only be a max of 3 volts? I find this quite alarming. Also, does anyone know if I can safely substitute the 9.4265 MHz resonator with a 10 MHz one? I cant find a direct replacement except for a custom order. But 10 MHz resonators are plentiful. Thanks guys!
Old 2nd January 2019
Here for the gear

Did you ever find a replacement crystal or suitable substitute? I have a DX7 and am currently trying to find an answer for this issue.
Old 2nd January 2019
Lives for gear
acreil's Avatar

I'd heard that someone got one custom made at the correct frequency. If it's the wrong frequency it will still work, but it will be out of tune.
📝 Reply
Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.

Slide to join now Processing…
🖨️ Show Printable Version
✉️ Email this Page
🔍 Search thread
🎙️ View mentioned gear
Forum Jump
Forum Jump