Disklavier

Hello. I am a disklavier tech. I have a customer with a Mark II who is upgrading to a DKC-850. Since it is a Mark II, I need to run it thru the midi ports on the original head unit. I also need to set the midi setting to keyboard out. The problem is the screen is blank on the head unit and I am working blind. Can anyone post the steps to setting the midi out to keyboard out for me?  

Thank you,

Jonathan. 

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