I have just received an older Atlas model that appears to have the older Lenz non sound dual mode decoder in it. It runs fine, very slow creeping speed at step 1 on 28 speed steps. HOWEVER...the locomotive makes some serious loud humming noise while it operates. I have verified the jumper is in the DCC position and I am not trying to run it on DC power. This model would be spendiforous if not for the motor hum.  I have no previous experience with Lenz decoders in any scale.

I found this:

Lenz

I am planning on installing an ESU LokSound decoder. I have seen somewhere(maybe YouTube) that using a TCS KA on the decoder would void the warranty and that there was a danger that the TCS KA could somehow burn up the decoder. 

I do not have much experience with this type of thing, this will be my first time installing a decoder, and I dont plan to jump too deeply into programing the decoder...I just have the TCS KA and I thought it would be good to use. 

Thank you for any help here. 

So I've added a Lok sound 5 to an Atlas H-16-44.  This loco originally came with it's own DC/DCC decoder and was supplied with directional LED marker lights (4) that were RED/Green.   Each of them has 3 wires:  Black Red and White

On the loksound decoder,  the only way I am able to get them to light is by:

Black to Aux 1, Red or White to Common to give Red or Green respectively  

Iowa Scaled Engineering has just released a new product called "The Motorman". The Motorman is an automatic reversing train shuttle controller for both DC and DCC locomotives. Using TrainSpotter infrared proximity detectors at each end, the Motorman will continuously drive the train back and forth, automatically stopping and reversing at the end of track. With control of the speed, locomotive address, delay time, and other settings, a fully customized experience can be created.