Vintage Simmons Drums (UK) Users Group

The selector pad is only 16 switches. To check, if the SDS7 is working right, take a wire and connect (in the socket of SDS7) pin 4 with 7 for PRG 1, 2 and 6 for PRG 2, 3 and 5 for PRG 3 and 4 and 8 for PRG 4. Then check 3 together with 7,6,5,8 for the next 4 PRG. Then again with pin 1 together with 7,6,5,8 for the next 4 PRG. Then again with pin 2 together with 7,6,5,8 for the next 4 PRG. Pin 9 and 10 don't have function. Clean the pins inside the selector jack.
To check the wires, remove the FSR and shortcut the Matrix X colours green-yellow-brown-red with one of the matrix Y colours white, violet, blue and black.
It is possible to clean corroded FSRs, but I don't think you need to.

Best

Michael


  ----- Original Message ----- 
  From: music@... 
  To: Simmons_Drums@yahoogroups.com 
  Sent: Saturday, March 01, 2014 11:40 PM
  Subject: Re: [Simmons Drums] SDS7 Program Selector Pad issues


    
  I didn't realize that I had to remove the rubber that is taped down to the chassis in order to access the FSR contacts.... was hoping they would be inside the case itself. The chassis merely houses an Earth tap, a ribbon connector to/from the FSRs, and a bit of shielded cable that exits out of the chassis to the SDS7. Huhn.

  Before I attempted prying the rubber surface off and risking damaging it, I tried the Selector Pad on a second SDS7... and was surprised to see that Selector Pad buttons 2, 6, 10, 14 (basically, the second column on the Selector Pad) which didn't work on the first SDS7 worked on the second SDS7... however, pad buttons 9, 11, 13 which did work on the first SDS7 now didn't work on the second SDS7 !!!!

  So, this points to an issue on the SDS7's themselves I would think. Either the connector on the back of the SDS7 cases or a component inside the Brains needing attention...

  Thoughts? 

  Cheers
  Alan