AWSD PSU can't power MV6F !

[neokoen]

Well as the title says, the PSU in my AWSD can't power my MV6F. :sad:

So can I power it from another PSU, leaving the original one untouched ?
I have a Wei-Ya 150W that I used before to power my six-slotter. Would it be bad if (just) the GND lines of the PSU's are connected?

Should I install a different one (suggestions)?

[A2-UEP]

+5v Line needs turning up?

[neokoen]

It's not as simple as turning up the voltage, I measured 5.02V and it powers other boards without problem (ST-V and MV2F). On the sepparate PSU the voltage is also 5.02V and that powers the sixer without problems.
I know that the MV6F draws quite a current, a (desktop style) power supply can power my MV2F (and the MV4F) but not the MV6F, it really is the current the source can supply which is the limmiting factor. :sad:

[Mr-Megalo]

can you show me pics of your 150w PSU Koen

[neokoen]

can you show me pics of your 150w PSU Koen

Yep (see also my thread on the' junkergun')
http://www.we-play-games.com/community/picture.php?albumid=14&pictureid=67

[Mr-Megalo]

yes i've just seen the other thread and replied.
personally I would say maybe its a good idea to just stick with a 4 slot in the AWSD, the wei ya PSU that is in the AWSD is only a low wattage PSU, and swapping out the PSU's isn't just as easy as replaing the stock one with the one above as the connectors are different.

[neokoen]

Meg, I was kind of hoping to install the sixer externally and connect it with a JAMMA extension cable (also easy access to slots).
If I can keep the PSU with the board that would actually be great too. So would it be a problem if the GND of these PSU's are connected (needed for the button pull-down)?
The internal PSU could then power another board and hopefully a JAMMA switcher can be used to go between boards :mellow:

(I guess I should simply test it by putting a multimeter between them and hope to read 0V)

[Mr-Megalo]

well, when you have 2 PSU's in a cab to power JVS stuff, like a standard JAMMA PSU and a small 3.3v wei ya PSU, you have to make sure the grounds are "common" so I'd say that in theory with what your suggesting the same would apply.

drop in a PM to arcadefever, I know he has done work on his cabs to run multiple PSU's in his cabs that run several PCB's at the same time, I wouldn't like to give you incorrect advice that cause you to damage your cabinet and/or your PSU's simply because if you kill the AWSD PSU you can not replace it with a stock item.

[neokoen]

Thanks Meg, I'll PM the man with the pleasant illness :wink:

[gundaRn]

This won't be much help; but to power my 6 slot externally (via a JAMMA extension) I had a problem with the length of the extension itself causing a problem. No matter what I did with my power supply the only workable solution I had was to shorten the length of the extension.

[neokoen]

Well Gun, that is not a stupid remark. That's actually the reason why I want to keep the PSU close to the mobo and avoid excessive voltage drop over the JAMMA extension.

The plan is to run a power cable from the cab up to the PSU close to the board and have a power switch also near the mobo, that way you can't power the board without the cab being on but can switch the mobo off to replace carts.

I'm thinking of building a nice wall ornament out of all this :blink:

[neokoen]

Had a very long stare at the AWSD schematics and some time listening to the beeping of a continuity tester and come to the following conclusion (which I'm sure many already know):

The entire CP, bottons, counter, sound and video section is isolated from the power section of the cab when no board is plugged in. GND connections between the sections are made on the game board (I had no idea this was like that so maybe interesting for others...).

That makes it possible to use everything from the cab (except the bunch of extra power connectors) using an another PSU by avoiding any connections with the upper power section of JAMMA connector (the smaller part seen from the insertion key). So it is in fact *relatively* easy to build an adapter board with sepparate PSU which is totally isolated from the internal PSU. (If you need 5V in the CP you need to make an exception but also that is not a problem.)

However when the cab is powered on so is the internal PSU and it shouldn't be left unloaded so it's probably better to build in an on/off switch (AC side) for the internal PSU.

So initially I thought the extra PSU would be connected through GND via the CP section to the internal PSU but this is not the case unless you make the connection yourself. :blush:

I don't know if this sepparate section scheme is part of the JAMMA standard but I'm very pleased that the cab is wired like this :laugh:

So this means I won't go the x-in-1 JAMMA switch way but keep it to an adapter board that needs to be plugged into the JAMMA connector and the on/off switch for the internal PSU, no need to consume more electricity than needed :wink: