IC Help

argonrepublic · 31st December 2005, 05:28 AM

Can anybody help with this IC? Yamaha offers no details or datasheet. The purpose of the IC is to convert Synth keys to a Keyvoltage. The voltage should be .25v@ key 1 and 4Volts at key 37.
I have attached a shematic

pinkmouse · 31st December 2005, 07:25 AM

What's your problem with it? It is most likely custom silicon, made specifically for Yamaha, and I would guess, a long time ago, as this would be implemented in digital these days.

argonrepublic · 31st December 2005, 09:33 PM

My problem is that I don't understand the circiutry so I don't know where to begin testing. I have no Key voltage.

31st December 2005, 07:25 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	What's your problem with it? It is most likely custom silicon, made specifically for Yamaha, and I would guess, a long time ago, as this would be implemented in digital these days. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

31st December 2005, 09:33 PM	#3
argonrepublic diyAudio Member Join Date: Apr 2005 Location: Simcoe Ont	IC My problem is that I don't understand the circiutry so I don't know where to begin testing. I have no Key voltage.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)