Freerails Home 
Home Search search Menu menu Not logged in - Login | Register
Freerails > Model Railroad Forums > D.C.C. Electrical & Sound > Troubleshooting Help - 'E.S.U.' Sound Decoder

Freerails IS ACCEPTING new Members ... To join Freerails ... See how to Register as a Member in the 'Joining Freerails' Forum

Troubleshooting Help - 'E.S.U.' Sound Decoder
 Moderated by: . Page:  First Page Previous Page  1  2  3   
New Topic Reply Printer Friendly
 Rating:  Rating
AuthorPost
 Posted: Thu Mar 5th, 2020 07:17 pm
  PMQuoteReply
21st Post
Reg H
Moderator


Joined: Sun Oct 19th, 2014
Location: Shelton, USA
Posts: 917
Status: 
Offline
 
Hang in here as I temporarily change subjects.

I have been working on an Athearn "blue box" SW7. 
My first attempt ended in failure because I had neglected to check,
to see if the chosen decoder would fit in the locomotive. 
I had the decoder laying around.

I checked the Digitrax sizing app,
and they recommended the smallest decoder they make.  Wow. 
Anyway, after it arrived I determined it would fit
(I ended up mounting it on top of the front gear tower)
I did the install.

When I put it on the programming track it programmed perfectly. 
But it wouldn't run.  Just like the SW1200.

So I examined all the connections. 
I had determined that the locomotive ran fine before starting the conversion. 
I could find nothing wrong.

I ran a resistance check, between the motor frame and the chassis. 
Completely open !

Though I had tugged on the bottom motor connection, confirming it was firmly soldered,
I hadn't pulled the motor to look at it.  As a last resort, I did that.  Very firmly soldered. 
In fact, the wire was buried in a rather slovenly blob of solder.  

Upon close examination, it looked like that blob of solder, might be able to contact the frame. 
Without much hope that was the problem,
I applied some additional tape to the frame and reassembled everything. 
Well, at least the chassis. 
I wasn't about to finalize the install until I was sure it basically ran.

AND IT DID!
 
That bit of solder, had been defeating my efforts to isolate the motor.  

You know where my mind is going.  

Once I have the SW7 completed
(There are some minor issues.  Something is still rubbing on one of the flywheels)
I am going to take a VERY close look at the SW1200's motor isolation.  

Reg




____________________
Reg
Back To Top

 Posted: Wed Mar 11th, 2020 04:26 pm
  PMQuoteReply
22nd Post
Reg H
Moderator


Joined: Sun Oct 19th, 2014
Location: Shelton, USA
Posts: 917
Status: 
Offline
 
For information purposes for those on this thread.

The SW7 is complete.












____________________
Reg
Back To Top


 Current time is 08:41 pm
Page:  First Page Previous Page  1  2  3   

Freerails > Model Railroad Forums > D.C.C. Electrical & Sound > Troubleshooting Help - 'E.S.U.' Sound Decoder
Top



UltraBB 1.172 Copyright © 2007-2016 Data 1 Systems