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BuddyC

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Hi all and happy new year!

I got a NVS 4000 PSU for use in my Astro cab since it got stereo amp and is generally regarded as a kick ass PSU.

Everything works, sound, powers everything on etc etc, but the 5v drops over time.
Running for example my CPS2 multi works fine and 5v reads 5,03V when I boot it up( I use a JNX Atlas with voltmeter)
After about 1 hour, it has dropped down to about 4,94V- 4,95V. Everything works, but I think I need to do a recap.

Will a recap do the trick or do I need to look at something else?
 

BuddyC

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Everything looks pretty clean.
64F5E503-1FEB-4132-97D3-632245C8E13A.jpeg
 

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djsheep

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In my experience, voltages can fluctuate slightly on cabs due to what’s happening in game.

That drop you’re seeing is negligible IMO, however recapping any old arcade cab PSU is a good course of action.

I’ve had all my Astro City PSU’s recapped and they run a treat now.
 

lolo-san

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I think I'll need to do a recap soon for my NVS-4000 too as I've experienced the same voltage drops.

Anyone would have a link to the cap list for the PSU part please ? (I already did the stereo amps)
 

BuddyC

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Arcade parts and repair is making a cap-kit for me. Sent them the complete pcb location ID for my version, So it should be possible to buy a kit from them soon.
 

BuddyC

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Here is the location ID etc for my power and sound PCB No diameters thought....

Powerboard

C6 – 200V – 680 uf
C7 – 200V 680 uf
C11 – 50V – 1 uf
C12 – 50V – 1 uf
C13 – 50V - 1 uf
C30 – 50V – 100 uf
C21 – 50V – 22 uf
C18 – 50V – 2,2 uf
C20 – 25V – 33 uf
C49 – 50V – 4,7 uf
C26 – 50V – 1 uf
C28 – 50V – 2,2 uf
C37 – 16V – 330 uf
C43 – 6V – 470 uf
C36 – 50V – 3,3 uf
C35 – 16V – 1000 uf
C48 – 10V – 2200 uf
C42 – 10V – 2200 uf
C34 – 16V – 1000 uf
C47 – 10V – 2200 uf
C44 – 16V – 3300 uf
C41 – 10V – 3300 uf

Soundboard:

C1 - 35V – 4700 uf
C2 - 35V – 4700 uf
C13 - 50V – 10 uf
C 14 - 50V – 10 uf
C15 - 50V – 10 uf
C16 - 50V 2,2 uf
C17 - 50V - 10 uf
C18 – 50V – 2,2 uf
C19 – 50V – 2,2 uf
C20 – 50V - 2,2 uf
C23 – 50V – 33 uf
C25 – 50V – 33 uf
C22 – 50V – 1 uf
C21 – 50V – 1 uf
C3 – 50V – 100 uf
C4 – 50V 100 uf
 

lolo-san

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out of curiosity : which ones are the filter caps ?
 
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