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National 157 dbv comm error


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So, I have tried two different BA30SA's in this machine and check the various settings in the programming. I'm stuck and this is a really good account. Any ideas?

 

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Check your setting on switch 3 in the validator control box.  Switch 3 controls the pulse width that the validator puts out.  Since this is a later 157 the machine harness should be plugged into the white 9 pin connector for power and the 18 pin black connector should be plugged into the bottom of the validator control board.  If by chance you ONLY have the white 9 pin connector then you will need a dummy plug for the 18 pin socket, but I seriously doubt that the 157 would be using that simple harness.

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