I purchased a used Soundtraxx DSD AT100LC Sound Decoder about a year ago and wired with LED’s and Runs Great but LED’s stay with a small Glow in the Front when Running Reverse (I’m ok with that & noted that also on the Soundtraxx site unless I make changes)
The Real Problem is the SOUND - A capicator was previously installed and I hooked up a speaker that I had and NO SOUND; (I did to a Decoder reset of CV8; also noted on the Soundtraxx of CV30 to a 2) eventually I took out the capacitor and still nothing; tried it on one of my Home Speakers and the Sound Works although Very Faint.
Maybe I’m hooking up something wrong with the Speaker and Capacitor but I could not find an instruction Manual with a Diagram with this specific type.
Any Help would be GREATLY Appreciated.
Cary
Here is a link to the manual:
http://www.soundtraxx.com/manuals/lc_manual.pdf
I doubt that the decoder has the power to drive a “home speaker.” You may need to try another small one to make sure the problem isn’t your speaker. A capacitor should not be necessary.
Check the CV for master volume and some of the other volume CVs.
I had some of the LC decoders. Found in a Google search. Been a while.
http://tonystrains.com/technews/soundtraxx-lcleds.htm
The LC uses I think a 33 ufd, bi-polar cap in series with one speaker lead. Need a 8 ohm speaker. Sound will be low with no baffle.
Normal speaker is 28mm round or 16mm x 35mm small oval.
Edit.
Just looked at the diagram in my PC and a 33 ufd, 16 volt bi-polar cap came with the decoders. Put in the positive polarity lead to the speaker.
Rich
Thankyou for the Replies, Did have that Soundtraxx site up and noted of turning up the Volume on CV’s 120-123. Could not Find a Master Volume. Found out YES, The Speaker is slighlty Damaged that I had plus a loose wire…(was in a little case for a year or two) Unsure what I’ll do with the Capacitor yet? It also did have a bit of a humming noise but apparently I can adjust the senstivity with the Motor on CV9 175-185; Does this sound Correct? Guess the Goal also is to Get a Decent Speaker Now.
Cary
As I said, the cap is in series with one speaker lead.
Rich
Thanks for the Diagram; I need those…
Just an FYI…Not Working…Sound was maybe a 0.5 on a scale of 1-10 on a new speaker I got; called Soundtraxx (george I think) very helpful but it seems I may need a new on-board amplifier that may not be around anymore due to the year this was made of course…(my fault for buying used and trying to save a few $$)
Cary
If it was run without the cap, probably fried the amp. The capacitor in those is NOT a keep alive, it’s a filter to keep the not reproducible anyway low frequencies out of the speaker.
I have one I use a sound only, with a really big speaker in an F7 B unit dummy. I would never use one with the motor connected - those decoders don;t even have silent drive so there is a buzz in the motor which, depending on the loco it’s installed in, can be louder than the sounds.
–Randy
