New Astro City PSU 400-5198-01Y - Voltage Pot Extender

[Fixon]

Adjusting the +5V on the 400-5198-01Y PSU inside of a New Astro City is pretty cumbersome. You need a small screwdriver, lower it through a hole, and then hopefully hit the pot inside the PSU to adjust. That's why I made this thing to make that process easier.

This pot extender is keyed to fit on top of the voltage pot. It also has a tab at the top that secures it in place, meaning you can't lift it up either. The tip that sticks out of the PSU when assembled is sized for these pot knobs that you can find all over the internet.

The PCB of the PSU is held in place by six screws and is very easy to disassemble.

You can get the print here:
https://www.printables.com/@Fixon_2861390

Enjoy but please respect the license!
No selling and credit if shared/modified.

 

[Sp33dFr34k]

Good idea! When I was using this PSU I was just using a wooden dowel glued on top of the pot lol. But hey, it worked. This looks way nicer though, a must for everyone using this PSU!

 

[nem]

That's awesome!

I use a metal tipped screwdriver because I have nothing else that fits that hole, always guessing if I'm going to short something.

 

[Fixon]

That's awesome!

I use a metal tipped screwdriver because I have nothing else that fits that hole, always guessing if I'm going to short something.

Exactly!
The PSU is also mounted on the bottom of these cabs, so you're on all fours, and with surgical precision, you're trying to hit the tip of the pot while looking at the voltmeter on the JAMMA. Very cumbersome!

 

[Mageta the Lion]

Is pla safe in that environment?

 

[Fixon]

PLA

Is pla safe in that environment?

TL;DR
It's safe and you will not get a shock using it. It's the janky screwdriver that will

Good point!
PLA is non-conductive, although it can absorb moisture over time. That doesn't mean it will make it conductive but degrade the PLA plastic, maybe.
This voltage pot extender is not directly in contact with any high-voltage parts nor low-voltage. It just sits on top the actual voltage pot and exits through a hole at the top with another plastic cap on top, in this case, a volume pot cap.

One thing to consider with PLA is heat. Around 60-65°C, PLA becomes soft. Now, I haven't checked the temperature of the PSU inside a cab that's been running for a while. That could make the voltage pot extender soft enough to twist around the pot on the PCB while adjusting. Although this is mostly unlikely, printing this in a stronger material like ABS or even carbon fiber filament will solve that.

 

[IPD]

I just bought a bunch of trimmer tools a long time ago and have them permanently sitting in the power supply in my Astro cabs. Perhaps not the most elegant solution, but it works...

 

[zionfarm]

Definitely need two of these.

 

[d00mdrew]

Great idea! This should work for the Aero City PSU as well (voltage pot is on the side of those). I had to break off the end of one of those Enginner non-conductive adjusters to fit in the gap between the PSU and coin box wall.

 

[9999 Damage]

I have a plain 400-5198 and wanted to use this, but I found it ~2 mm too high/tall for the case’s metal supports. Not sure if the 400-5198 is actually different in height from the -01Y model.

I don’t know anything about modeling, so I just sliced off the bottom lip in Bambu Studio. The bottom lip looks like it’s suppose to be the part that fits over the pot, but the shroud above is tight enough that it seems okay without it for now.

 

[Fixon]

I have a plain 400-5198 and wanted to use this, but I found it ~2 mm too high/tall for the case’s metal supports. Not sure if the 400-5198 is actually different in height from the -01Y model.

I don’t know anything about modeling, so I just sliced off the bottom lip in Bambu Studio. The bottom lip looks like it’s suppose to be the part that fits over the pot, but the shroud above is tight enough that it seems okay without it for now.

Maybe the pot soldered to the board is higher up than mine, or it's a different pot. I can modify the model to avoid this but it comes with a risk of the extender lifting up from the pot. But I don't think it's a big issue.

 

[Sp33dFr34k]

If somebody would be able to make something similar for the NVS4000, I would be all ears

 

[Fixon]

I have a plain 400-5198 and wanted to use this, but I found it ~2 mm too high/tall for the case’s metal supports. Not sure if the 400-5198 is actually different in height from the -01Y model.

I don’t know anything about modeling, so I just sliced off the bottom lip in Bambu Studio. The bottom lip looks like it’s suppose to be the part that fits over the pot, but the shroud above is tight enough that it seems okay without it for now.

I've added another version with a lower top tab (2mm) of the extender. Check it out:
https://www.printables.com/model/1161794-new-astro-city-psu-400-5198-01y-voltage-pot-extend

If somebody would be able to make something similar for the NVS4000, I would be all ears

I might have some people sending over different PSUs for me to fix extenders for these as well. Will report back when I have something.

 

[Sp33dFr34k]

I might have some people sending over different PSUs for me to fix extenders for these as well. Will report back when I have something.

That's awesome, thanks!

 

[9999 Damage]

I've added another version with a lower top tab (2mm) of the extender. Check it out:
https://www.printables.com/model/1161794-new-astro-city-psu-400-5198-01y-voltage-pot-extend

I might have some people sending over different PSUs for me to fix extenders for these as well. Will report back when I have something.

Awesome, gonna try it out! Might take a couple days because 1) I also need to make sure this PSU and voltage pot are still working at all (my dirty hack might not have been grippy enough), and 2) I'm letting it discharge between times I open it.