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Odd Behavior with a New Decoder

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  • Member since
    December 2012
  • From: Mesa, AZ
  • 1,530 posts
Odd Behavior with a New Decoder
Posted by RideOnRoad on Friday, December 26, 2014 1:34 PM

I just installed my Christmas-present TCS K0D8-D decoder into a Kato F3B (N-Scale) and it doesn't seem to be working quite right. I can talk to it on the programming track, assign an address, read and set CVs. It mostly runs on the main track, but it is not smooth, like it is not getting consistent power. Also, when it is stationary, on the main track, it has a slight hum or buzz. I do not have the problem with my other locomotives. Any ideas?

Richard

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Friday, December 26, 2014 1:43 PM

Remind us, Richard, which DCC system do you use, NCE, Digitrax, etc. ?

Rich

Alton Junction

  • Member since
    December 2012
  • From: Mesa, AZ
  • 1,530 posts
Posted by RideOnRoad on Friday, December 26, 2014 2:53 PM

Sorry -- Digitrax Zephyr

Also, having learned my lesson, the decoder was soldered to the leads.

Richard

  • Member since
    January 2010
  • From: Chi-Town
  • 7,712 posts
Posted by zstripe on Friday, December 26, 2014 7:49 PM

RideonRoad,

Is this the install?

http://www.tcsdcc.com/Customer_Content/Installation_Pictures/N_Scale/Kato/EMD_F7B/EMD_F7B.html

Hum or Buzz? DC turned off?

Take Care! Big Smile

Frank

  • Member since
    December 2012
  • From: Mesa, AZ
  • 1,530 posts
Posted by RideOnRoad on Friday, December 26, 2014 10:07 PM

Frank,

I used the F3B instructions,

http://www.tcsdcc.com/Customer_Content/Installation_Pictures/N_Scale/Kato/EMD_F3B/EMD_F3B.html

but they are basically the same instructions.

I took my son-in-law out in to the garage to listen, and we decided it was a buzz. It is very quite, but it is there. The buzz is there even if the direction on the Zephyr is set to "Brake." I did not change the DC switch on the decoder from whatever was set as the default. I will check it in the morning.

The only non-standard thing I did was to tape down the end of the decoder using Kapton tape, as it was a little bowed and not seating completely, but I don't think that should have an ill effect.

The good news is I am currently only disappointed, not frustrated, at least not yet. I am sure it is something simple, a novice mistake of some sort.

Richard

  • Member since
    July 2006
  • From: Bradford, Ontario
  • 15,797 posts
Posted by hon30critter on Friday, December 26, 2014 10:29 PM

Richard:

It doesn't sound too good to me when you say the decoder "...was a little bowed...".

I would contact TCS about a replacement.

Dave

I'm just a dude with a bad back having a lot of fun with model trains, and finally building a layout!

  • Member since
    December 2012
  • From: Mesa, AZ
  • 1,530 posts
Posted by RideOnRoad on Saturday, December 27, 2014 2:48 PM

It seems I had multiple problems. The first was a decoder that was not completely seated on the pickup rails. This seems to have been the cause of the buzz. The second problem was a larger problem. It seems when I reset the momentum CVs, the decoder got confused. I replicated the cause and effect on another locomotive. A factory reset on both cleared the problem. Now, onto speed matching and consisting (I hope that is the right term). 

Richard

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