Need some wiring help with board...

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10 Apr 2020 01:55 #163432 by Catch22
And if I do remove the shunt, and wire directly to enable on the 7i77 where do I wire that to the drive. Inhibit in ?

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10 Apr 2020 15:02 #163490 by tommylight

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10 Apr 2020 16:16 #163504 by Catch22
I can't seem to find the J1 on this board anywhere, and I'm using a magnifying glass, or is it on the underside of the board?

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10 Apr 2020 16:19 #163505 by Catch22
Could I try and use 2.7k 1/2 watt resistor, that's all I have here right now?

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10 Apr 2020 16:35 #163507 by jj80909
To invert the inhibit on the AMC amps, you have to removed the soldered shunt on J1 seen in the attached photo:

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10 Apr 2020 17:17 - 10 Apr 2020 17:29 #163512 by Catch22
My board is a bit different, still can't find the dang J1.
Tried to add a picture but it won't let me says it exceeds the size I'm aloud.
Last edit: 10 Apr 2020 17:29 by Catch22. Reason: Ad more

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10 Apr 2020 22:26 #163533 by Catch22
Finally found the J1. Now is the J1 the one right beside it or the one with the white box around it.And do you have to take the board right off or can you remove it just as it sits.
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12 Apr 2020 18:38 #163804 by superlen
Yes, the one in the box. It's a 0 ohm resistor loaded there. You simply need to remove it. You don't have to pull the board, but you need to make sure it's powered off first.

I would also make sure to watch out for ESD. One side of this resistor is most likely a direct connection to a processor input pin. I wouldn't run out and buy esd wrist straps and such, but I wouldn't pull it off while sitting on a wool chair, in a carpeted room, in Arizona, during an August dry spell either. :)

Len

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