Monster Moto Shield High Current Draw

Components & Accessories Power
1

Hi, I just purchased a Monster Moto Shield unit (knowing they’re retired, which is ok). The first time I connected my power supply to the input pins + and - at the bottom, the input current immediately climbed beyond 15 A so I immediately disconnected power to prevent possible damage. This was with no load connected. Now I am confused at how to proceed. Any ideas?

2

It sounds like there is a short; share a photo of the soldering

3

So far only test leads to the input and the header pins soldered.
I’m usually quite OK with my soldering in spite of age and tremours… :slight_smile:

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Tell me if I can send close-ups of anything?

4

Resistance over the input terminals is 600 Ohm

5

Did you inherit this used or something? It looks like it has been soldered to before (orange area)

I do see what might be some problem areas…namely the purples spots appear to be corroded

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and there might be a bridge between VIN and GND on the left side…perhaps try cleaning those up a bit to see or re-solder…you could also test across the MOSFETs and see if they’ve shorted