Location of Digital Signal Processor (DSP) on the Big Boy tender CB?

The large processor chip with legs on all sides.  Not a replaceable part unless you make circuit boards in your factory in Taiwan. :-) G

@Susan Deats posted:

In my 20-3714-1 tender what is the location of the Digital Signal Processor (DSP)?

from MTH electronic parts:  part 20        AE1000E30  in tender
  AE1000E30  PROTOSOUND 3 / O GAUGE STEAM / TENDER BOARD (UNIVERSAL) / W/SUPER CAPS / EMI COMPLIANT

What makes you think you need to do something with the DSP?

If you're having issues with your Big Boy and the DCS signal bypass the 2/3 rail switch, if you're running 3 rail, and tie both drivers and wheels together for solid ground contact. I had signal reception issues with my 4014 restoration Big Boy till I bypassed the 2/3 rail switch and tied all the grounds (wheels) together. After that it's been fine.

gunrunnerjohn , if I have to go back into the tender after "tuning" the drawbar that was trouble, I want to check the DSP visually for obstructions or whatever.  I've had electronics behave after spraying with compressed air and/or spraying with electronic cleaner.   I also want to check the ventilation since it always starts and runs for a while.

  Thank you, Lou1985 .  If I remember correctly I did tie both drivers and wheels together.  I'm just not sure I bypassed the switch.

The Big Boy has been losing touch with the TIU off and on forever.  If I'm going to run my simulated passenger Excursion consist on my helix I will have to have the Big Boy and Diesel helper MU'd to climb that curved grade so the Big Boy must pay attention consistently.  The diesel will pull all but 4 of the 26 cars up the curved grade and it stays in touch with the DCS system.  They're both PS3.

@Lou1985 posted:

If you're having issues with your Big Boy and the DCS signal bypass the 2/3 rail switch, if you're running 3 rail, and tie both drivers and wheels together for solid ground contact. I had signal reception issues with my 4014 restoration Big Boy till I bypassed the 2/3 rail switch and tied all the grounds (wheels) together. After that it's been fine.

When you removed the switch did you tie the brown and red wires to the white and black wires?

@Susan Deats posted:

When you removed the switch did you tie the brown and red wires to the white and black wires?

I checked the wires with a multi meter but I'm 99% certain that the brown wire was hot (center rail) pickup and the black wire was common (ground). My Big Boy is the last run, 20-3807-1. I doubt the wiring colors changed but I would double check to be sure.