Yamaha DX-9 -1983    Weight = ? Lbs. Number mfg.= ? MRP=$1395

User Manual: Yamaha
Reset Proceedures: N/A
Operating System code:
MIDI or other control protocol:
Software related Links: N/A
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual: fdiskc archive
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: Many
General Info Links: Vintage Synth Explorer

Circuit Overview:
     A digital synthesizer which utilizes special processing chips designed to support Yamaha's FM synthesis architecture. 4 operator scaled down DX7. I really suspect they released this with the Blah sounds just to give people a bad reference floor so that they would buy a DX7. :-) Whatever they did, it worked. I've heard figures that they sold about a million units of them...I'm not sure if that referred to the entire series or just the early ones (DX-1 through -9). Anyone?

Service Tips:
     I've found most of these units to be fairly rock solid circuitry wise. Abused units sometimes have solder problems. I've fixed the few I've had in by just going over suspected areas of the circuit boards on related synths (DX7's).

While Yamaha normally does not keep parts around more than 5 years or so. I try to stock what I can. Out of dx knobs.
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