Ms. Pacman Cabaret Scratch Build

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Zebidee:

--- Quote from: Greenman on October 01, 2022, 05:29:06 am ---Almost ready for testing. Just wiring up a jamma interface temporarily for testing it. Should know soon if it works.

--- End quote ---

Love it that you are committed, balls 'n all. I'd at least test the TV with something known first, like a TPG or PC CRTEMU setup!

But hey, sometimes I take that dive-in approach too and everything works out in the end :D

Greenman:

--- Quote from: Zebidee on October 01, 2022, 06:26:05 am ---
--- Quote from: Greenman on October 01, 2022, 05:29:06 am ---Almost ready for testing. Just wiring up a jamma interface temporarily for testing it. Should know soon if it works.

--- End quote ---

Love it that you are committed, balls 'n all. I'd at least test the TV with something known first, like a TPG or PC CRTEMU setup!

But hey, sometimes I take that dive-in approach too and everything works out in the end :D

--- End quote ---

False bravado on my part, I'm afraid. I may have a backup monitor if it doesn't work...

Here are the build files for anyone who may wish to build a cabaret ms. pacman in the future: :)

Side profile that I have converted to life size and was taken to officeworks to print:

Additional panel dimensions:

Approximate position for each panel:

Zebidee:
Thanks for sharing those dimensions, very useful :notworthy:

I'm confident your TV will be fine.

Have you given much thought to mounting the CRT?

abispac:
I got 13 inch tv waiting for a small project, perhaps a mini robotron, and im picking up today a 19inch rca, that will mod for a dk cab, i love moding tvs, as most of them dont have burn in, and the color are bright as new.Here in my city, you can still find arcade crts, but most of them have burn in, or are flat tv tubes and most of them are chinese chassis, so regular tv are still doing the job great. Ill keep looking at your build, great job on the wood.

Ps for the electronics gurus out there: I still wonder if we can replace capacitors with something to help rgb moded tvs with horizontal and vertical withd.

Zebidee:

--- Quote from: abispac on October 02, 2022, 12:49:35 pm ---Ps for the electronics gurus out there: I still wonder if we can replace capacitors with something to help rgb moded tvs with horizontal and vertical withd.

--- End quote ---

Unfortunately this is not really practical.

For width, if you can find the right capacitor (near the coil pins & flyback, large brown or blue polypropylene "pillow", with a value like 474J, or maybe 334 or 684... maybe), ... it is possible to sub in another cap of close to original value, and you may get a small width change. These mods are permanent, not like a pot.

Needless to say, this is cowboy territory and do at your own risk.

Arcade monitors usually get some width control via a large induction coil around a ferrite core, and turning the core to move it in/out affects the inductor and width.

On arcade monitors they are often broken anyway because the cores are very fragile. If you use a metal tool like an Allen key to adjust (usually is a hex head), which many noobs will, you'll likely crack it. You can buy (cheap) special plastic adjustment tools for the purpose.

According to one of the best arcade monitor techs in Australia (who has fixed more arcade chassis than I've had hot dinners), some cheap Chinese arcade monitors don't even bother connecting the width coil to anything, they just run the traces right past and leave the coil there for looks.

For vertical, you would likely have better luck through the service menu. Hardware hacks may well be possible but would be different for each and every chassis. Hacking the vertical output IC essentially. Too complex, too many "moving parts" and different designs to find an easy fit-all solution.

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