Brand new MS3 Basic from MSLabs, purchased from TSE.
Followed all install steps provided, successfully. Now adding power/ground/analog signal for MTX-L.
Pin 1: Fused 12v Out (6A)
Pin 2: Device ground
Pin 4: Analog input

MTX-L face comes up as normal with no sensor attached. Went to calibrate in open air for the first time, and it went ER9 (insufficient voltage) and went blank. Battery/voltage is fine.

Tested Pin 1 output, no voltage.
Opened MS3 case. Only fuse I can find is a small glass tube type. 500ma. Not 6A. But, it does appear to fuse the output for Pin 1 according to a glance at the board traces. It doesn't visibly look toasty, but does not pass a continuity test. It's blown.

Questions:
Have I identified the appropriate fuse for the 12v+ wideband output?
If so, why the heck is it a 500ma?
If it was erroneous, I'm assuming I can go find a 5-6a tube style fuse and replace?

Thanks in advance.

 

Edit: Disregard my post, I didn't realize MS3 Basics have 12V outputs for widebands

 

Pretty sure the 500mA fuse is for 5vref

 

Sourced a replacement 500ma fuse, so I've got my MTX-L display back (no sensor).

Don't want to replace with correct? 6A fuse until I can confirm I've got the facts straight. Again, I can't find another fuse elsewhere on either board.

I'll write Andrew/TSE as well.

 

The fuse should be a 6A, not a 500mA one. Please post a picture of the fuse. We don't have 500mA fuses as there's nothing we would use them for, so I don't see how this could have happened. The only way I can think of, is if a 500mA fuse was put in the 6A lot from the factory. I just checked all our fuse stock and there is no 500mA fuse in there.

tldr; put a 6A fuse, not a 500mA fuse.

 

Thanks for confirming. Here's what came out of it:

 

These are the only two fuses we have ever used, both are 6A. Thanks for bringing this to our attention, we'll need to be a little more cautious in the future.