Yamaha DTXpress/DTXplorer/DTXtreme

I don't know if you have access to a multimeter, but if you do, the
rim should be just a few ohms between the ring and sleeve of the
connector when pressed, and 1k or 10k (I cannot remember which) when
you press the third zone.

It is not possible to press the rim and hit the pad - if the rim is
permanently shorted, the module ignores it - it expects the rim switch
to close within a certain time of the pad being hit.  I guess it works
this way due to the need to choke the cymbals.

I think there is some glue which could be stopping you getting it
apart, but there is a risk you could damage it.  What until it's
really broken.

If you can live without the rim for now, just use a mono cable - that
will ignore the rim switch.

Keith.