Oberheim Two Voice Keyboard Programmer

[matia]

Hello Slutz. I am having one bitch of a time getting the keyboard on my two voice sorted. Here's the issue, i've gone ahead and replaced every cmos chip and op amp on the keyboard controller and basically what i get is voice one triggering correctly but voice two has several dead spots. essentially it doesnt seem like the keyboard contacts because all the keys work for voice one but not voice two. i've checked the actual sem's with external voltages and everything seems to be fine.

if anyone has a schematic for the two voice programmer or a service manual for the two voice it would be of immense help to me. if anyone has seen this problem before please let me know what the fix was for you. any help is much appreciated

[tyler477]

Originally Posted by matia

Hello Slutz. I am having one bitch of a time getting the keyboard on my two voice sorted. Here's the issue, i've gone ahead and replaced every cmos chip and op amp on the keyboard controller and basically what i get is voice one triggering correctly but voice two has several dead spots. essentially it doesnt seem like the keyboard contacts because all the keys work for voice one but not voice two. i've checked the actual sem's with external voltages and everything seems to be fine.

if anyone has a schematic for the two voice programmer or a service manual for the two voice it would be of immense help to me. if anyone has seen this problem before please let me know what the fix was for you. any help is much appreciated

I think synthfool has the two voice service diagrams... my 2 voice isn't having any probs so can't help ya there (knock on wood)

http://www.synthfool.com/docs/Oberhe...rheim_2_voice/