Roland SH-101 problem...all keys playing the same pitch

volumetrik

Hi

Having trouble with my 101...all of a sudden just started to malfunction and now all the keys are playing the same note...had a look inside to see if any connectors were not plugged in fully but was all ok...anyone heard of this problem or know what it could be?

Thank you

the19thbear · Joined: Apr 19, 2007 Posts: 150 Location: denmark

Any news on this? i have a sh 101 with the exact same problems

elektro80 · Posted: Thu Feb 02, 2012 7:34 am Post subject:

The SH101 has a transpose switch. Does this in any way change the pitch?

It seems you guys are getting gate transmitted from the keyboard.

i know there are guys here who do have schematics for SH101.

the19thbear · Joined: Apr 19, 2007 Posts: 150 Location: denmark

Nope - the transpose switch doesnt work (the transpose on the vco works, but not on the controller (left lower side) - i dont think its gate. I measured the cv out, and its always on 3,95v. no matter if a key is pressed or not
The sequencer plays them same note all the time as well..
My guess is that its something with the AD conversion out of the DAC into the VCO - something on the path... Very Happy

elektro80 · Posted: Thu Feb 02, 2012 8:02 am Post subject:

Yup.. sounds reasonable.

donpachi · Posted: Sun Jul 21, 2013 7:07 am Post subject:

It is a bit late to chime in Embarassed

My 101 had the same problem a few months ago, volumetrik. It was the CV input jack. It started after I plugged an external CV source and then disconnected it. Repeatedly plugging a cable into it fixed the problem, the normaling to its internal CV source worked again. I guess the metal surfaces just got oxidized over the years and needed some scratching. Another easy test is to plug in an external CV source.

Check the jack itself. Could also be the solder joints.