Emax

Hello friends :-)

I recently got my hands on a new Emax II keyboard, model 2112, stereo 2MB, and im facing a little problem. 
The problem occur when i connect whatever scsi peripherals, like CDROM apple 300e, or ZIP 100 drive or spyrus CF card R/W.

Emax II is on ID 1, when i press : Drive Select and choose SCSI ID 2 where my CDROM reader is, the screen
either got frozen, either it shows black stripes and the sampler reboots.

All works fine, but not the SCSI (external), is there anything wrong, or is there any chip missing maybe on the mainboard ?
I opened the emax to clean it, but as im not an expert, maybe if i send one of you guys a photo of the board, 
you might be able to help me more?

Maybe i am connecting things wrongly ? i tried with terminated plug and without but it either freezes the machine either puts him back into a reboot…

Thanks in advance for your help

Laurent
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