Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Doh! Thanks, yes, embarrassingly that was the problem!
Managed to fix the keyboard by replacing IC34. The chip was shorting.
Got DCO 2 back to life, tracked it down to IC18 missing a connection.
Now I have a problem with the pitch bend. I get correct readings at IC10 pin 7 as described in the service manual. But the pitch bend seems to do the reverse of what you would expect.
Reading pin 7 of IC35 with the pitch bend in centre I get 0.7v, with it up it goes to -3V, down it goes to +3.5V. Is this behaviour correct? As I side not the synth sounds alot better tuning wise when the pitch bender is disconnected. I have read the resistance of the pitch pot and it seems to be functioning as you would expect.
Thanks again,
Al