A caveat: I'm a complete novice, though I am a computer engineer.
I bought an MRC Tech 6 Sound Controller 2.0 as a cheap and easy way to get access to a bunch of DCC functionality on an small track that had previously been DC-only. At first, it worked great and it was a lot of fun to have access to all the sounds on my one DCC loco (a WalthersMainline EMD SD70ACe with an ESU LokSound). It was even cool to switch the controller into DC mode and have it simulate the CV 2-3 acceleration/deceleration values for a DC-only loco.
Now however, even in DC mode, the throttle responds only at full-on or full-off -- either it spits out 0 volts or ~14V. Nothing happens until the throttle is at full, and then it won't reduce the voltage until you turn it all the way down. (Yep, I'm aware that it's a square wave and not a true linear voltage.) I've tested the same DC loco on the same track with a cheap Bachmann DC rheostat controller to ensure there's nothing else wrong.
I have tried all sorts of options for CVs 2-5 to try to fix it, but nothing seems to work. MRC's tech support says I should just ship it back to them, but I'm convinced it's probably an out-of-whack CV value.
Any ideas what the default values should be? Any thoughts on what else I may have done to get the controller into this state? Thanks!
JG401Now however, even in DC mode, the throttle responds only at full-on or full-off -- either it spits out 0 volts or ~14V. Nothing happens until the throttle is at full, and then it won't reduce the voltage until you turn it all the way down. (Yep, I'm aware that it's a square wave and not a true linear voltage.) I've tested the same DC loco on the same track with a cheap Bachmann DC rheostat controller to ensure there's nothing else wrong.
My reading of the instructions are it puts out variable DC in the Standard mode and 15 VAC in the Dual mode.
If it's putting out 0 or 14 V in DC mode, with nothing in between, no amount of changing CV's is going to fix that. How that fault affects Dual mode operation is above my paygrade.
https://www.modelrectifier.com/v/vspfiles/resources/dc-ac/Tech%206%202.0%20%200001200.pdf
to the forum. Your first few posts are moderated.
Henry
COB Potomac & Northern
Shenandoah Valley
Yeah, that was my reading of the docs too. I was holding out hope that perhaps there was a starting voltage setting (or something like that) that wasn't spelled out in there. Alas, off to MRC it goes. Thanks!