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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