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Last year I picked up a WBB gp-9 for a good price and it has been very reliable and quiet.  Over the Christmas Holidays my son decided to put the "nearly bullteproof" reputation of this engine to the test.  A descending curve taken too fast ended up with a six inch fall to the floor.  The body is none the worse for wear but the horn is now barely audible.  I mean everything else in the room needs to be off and listen real close and you can tel its still trying. ( not a huge fan of the true blast but its sounds nice enough for the price)

 

Anyway I popped off the shell looking for a loose connection or something and found what appears to be some time of corrosion one on of the 1000mf gizmos on the sound board.  I'm not an electrical guy but the wires from the speaker are going to this board and I can read the description even if I can't identify the part.  So my question is - What do I do to get my horn sound back on this engine?  Does this corrosion look to be the problem to any of you or is it incidental?

 

All help appreciated,

John Z.

P1262316

P1262313

P1262315

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Images (3)
  • General interior
  • corrosion view 1
  • corrosion view 2
Original Post

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There is a potentiameter switch on the circuit board that adjusts the volume, maybe it came loose or got knocked off the adjustment setting. Try cleaning it first with some ethyl alcohol or rubbing alcohol and a Q-tip on the adjustment ring, it may have a coating of wax that needs to be removed and then you can adjust the volume.

Sometimes a very fine flat tip screw driver like a jeweler's screw driver can be used to remove the coating.

 

If it makes any sound at all the wire harness is plugged in properly.

 

Lee Fritz

Originally Posted by jhz563:

That worked!  Yea! a repair that didn't cost any money!!

I'm glad that worked for you!

I had a Williams GP-9 fall about a foot from an elevated track onto the main layout and caused no real damage, just a small paint scar, have to look close to see it. Runs great and no problems with either can motor.

One thing about Williams engines, they work hard and don't break down easy.

 

Lee Fritz

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