Question RVL-PMS-2 Not showing voltage when trying to power via batteries.

Strix

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Oct 11, 2024
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So I got my RVL-PMS-2 in today and I was able to successfully get my wii trim to boot up. I'm very happy about that as I trimmed it with scissors. So much cleaner process. Now my problem is that I can get it to power on if it's plugged in via usb-c, but when I try to power it off of batteries, I don't get any output voltages. I do get 3.8v-3.9v output between B- B+, but the voltage does not seem to get to the Output pads. I get .2v readings on various components on half of the board, but that's all. The PMS PD 3 seems to be charging the batteries when plugged in. If I remove the batteries, I get just under 5v output at B- B+. I'm not sure if this is normal, but when I put one probe on my B+ and the other probe on 3.3v, 1v, 1.15v, and 1.8v I get 3.87V output on each one of them. I just thought it was odd, but I'm not sure what to do with that information or weather or not it's even relevant. I have my battery positives hooked up to b+ and my negatives hooked up to B-. Any help would be very much appreciated. TIA! I will be going to bed now. So I won't respond until later today.

Resistance Readings
B- to 3.3v .202
B- to 1v .1
B- to 1.15v .031
B- to 1.8v .03

My Multimeter is set to the 2k setting in resistance. Picture for reference
 

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Update, after removing the PMS from the housing I discovered about 3/4 of an inch of exposed copper trace pealing off of the back of the board, broken. I wired up a piece of 28 gauge magnet wire to the trace and used hot glue to secure it down and everything seems to be functioning as intended. I'm not sure how it got damaged, weather or not it came that way or not. However, I should note that the PMS went straight from the anti static sleeve into housing where it's not possible that anything could have rubbed off the protective surface. I wish I had taken pictures before making the repairs, the copper trace was clean, no evidence of rubbing or residue of any kind. Although I can't prove it, I suspect that it came delivered this way. I will make sure to do a full inspection of all parts I get from 4layertec from now on before use, just to be sure. I know this is a little out of order, but I thought I'd note down the appearance of the trace. before making the repairs. The copper was clean, and only the protective material on top of the trace was gone, none of the circuit board around the trace was damaged in any way. If the PMS did not come this way, I suspect the trace got hot and instead of blowing a fuse, it burnt up the wire. If that's the case, then perhaps they need to redesign the RVL-PMS-2 as there should be a fuse to prevent things like that from happening.

Note, these are just speculations. I'm not knowledgeable enough to make statements like this and present them as fact. I'm fairly new to this sort of thing and what I say should be taken with a grain of salt.
 
This is the first I've heard of that kind of potential fault. Can you post a photo for archival purposes?
 
This is the first I've heard of that kind of potential fault. Can you post a photo for archival purposes?
Unfortunately I was not mindful enough to take a picture before making the necessary repairs. Being in the moment and wanting to move forward with the project got the best of me I'm afraid.
 
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