Hello, first post in the group.
Just got an early SDSV SN# 362 with 5 modules; Bass, Snare, 2 Tom Toms and a digital HH. The HH might have been added later? But all boards are the early Rev1 style. I also, from a different source, got (6) SDSV black riot-shield pads, (1) SDS7 rubber pad, (1) SDS9 bass drum with the floating trigger, a possibly-rare or homemade cymbal with piezo, and have an additional Tom Tom module on the way in the next couple of days to complete the set for my liking.
One of the toms is having a problem generating noise. None of the noise adjustments work on the panel (including the mini trimpots) on that particular module. I cannot get that nice 'tssshh' sound behind the tom sound on this one. The other one is working fine. So far everything else seems to be working fine.
I'd already re-tinned the contacts on all the cards, just to make sure everything was seating correctly, and had to adjust the R28(?) internal trimpot on the toms and hi hat to center the audio. I really just guessed on this one as it was the first stop after the L/R outputs tracing backwards. The noise issue was there prior to me changing anything.
Is there an internal trimpot that adjusts the noise level? Or I'll ask it like this: what determines the factory 'un-altered' sound? I'm asking this because both of my tom tom cards have different factory presets, like one is low and one is hi, but if the modules are all the same, I would think they would have to be set to determine one was higher or lower, no?
For the noise issue, I'm hoping it was just someone screwing around with the internal trimpots and messed up the "calibration". If not, I am seeing that IC13, LM301, is the responsible noise generator?
Mike