Vintage Simmons Drums (UK) Users Group

If you have already opened it this far, the repair is easy. The black traces is corrosion and the malfunction is open circuits, check and locate with voltmeter. But you can mend the lines with liquid tin or silver paint. The paint is available in radio shacks or similiar.
If you need some posts for soldering your wires to, shoot some copper- plated staples into the wood, solder your wires to the staples and "connect" the tracks of the flex circuit board also with the paint. The current is not high, so a thin layer of paint is ok.
Good luck

 
  ----- Original Message ----- 
  From: p_k_daniels 
  To: Simmons_Drums@yahoogroups.com 
  Sent: Monday, June 23, 2008 12:25 PM
  Subject: [Simmons Drums] Re: silicon mallet


  --- In Simmons_Drums@yahoogroups.com, "p_k_daniels" 
  <pete.daniels@...> wrote:
  >
  > --- In Simmons_Drums@yahoogroups.com, "p_k_daniels" 
  <pete.daniels@> 
  > wrote:
  > >
  > > ok so awaiting the ebay silicon mallet...does anyone have a copy 
  of 
  > > its manual they could scan for me? Schematics etc would also be 
  nice.
  > >
  > OK so it arrived its not a Silicon Mallet! it something ive not 
  heard 
  > of ...its a multi mallet...same thing almost...main differences 
  are 
  > its got only 2 not 3 octaves, Its about half the length and all 
  the 
  > electronics are built into the synth like case, no seperate box. 
  > Anyway its exactly what I need as an addon for the kit. Now its 
  all 
  > fine except 6 of the 24 pads dont work...ive done some initial 
  > investigation ...all 99 patches work fine, headphones fine, amp 
  out 
  > fine, midi fine. Took it apart , the top boards are 12 pads each 
  and 
  > have some sort of trigger proccessing board incorporated, so 
  swapped 
  > the 2 complete top sections round and the problem moves with the 
  > section so I have either a partially duff processor card or some 
  > knackered triggers. next stage is to swap the trigger processing 
  > boards between the sections to try and identify if its the circuit 
  > board or the rubber/wood trigger pads. Will keep you all posted 
  and 
  > will get some photos uploaded soon. its going on the backburner 
  for 
  > now as Im off to Stonehenge and then Glastonbury festival.
  >
  Ok did some additional fault finding,and my problem is with the 
  primitive membrane keypads and I think its a build flaw that maybe 
  awaiting for all silicon mallets, so id advise if you have one open 
  it up and check...
  the 2 part membrane keypad is 2 pieces of semiflexible circuit board 
  the top is a silicon/graphit spray that hits a matrix of printed 
  tracks on the other one when the pads are struck.At one end the 
  printed track folds around the plywood base and is fixed in place 
  using a thin plastic strip and some sticky tape. The tape on mine 
  was yellow and black striped about 2 inch wide. something in the 
  glue of this tape has eaten the tracks turning them thin and black 
  and in some cases eaten them away altogether. so i know what the 
  problem is...still not sure how Im gonna fix it though.



   

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