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Hi,

I’ve got the DAP B&O F3 set, part 20-80004. Both A units are powered. Today I was running them and went to use the PFA. I hit the button and let it run halfway around the track with the bell ringing, all of a sudden the slave A unit starting running wide open. I shut the entire system down and restarted. The slave A will try to run even if it is not teathered to the B unit. I tried feature and factory resets with no luck. The main A does work perfectly fine. It continues to try to run. Any ideas? Is the board hosed?

Thanks,

John

Last edited by 2032
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@2032 posted:

Hi,

I’ve got the DAP B&O F3 set, part 20-80004. Both A units are powered. Today I was running them and went to use the PFA. I hit the button and let it run halfway around the track with the bell ringing, all of a sudden the slave A unit starting running wide open. I shut the entire system down and restarted. The slave A will try to run even if it is not teathered to the B unit. I tried feature and factory resets with no luck. The main A does work perfectly fine. It continues to try to run. Any ideas? Is the board hosed?

Thanks,

John

Typically, those boards can be repaired, don't panic yet.  Sounds like the motor drive FET is shorted.

Update

i soldered in the new FET and all is good. Runs like new now. I ran it with the shell off and both motors are turning freely.
I think what happened was a traction tire came off and locked one motor for a slip second. I’ve got new tires on order. I won’t run it again until the tires come in.
Thanks again for all the help and suggestions.
john.

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