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Have you tried the timings noted here: https://www.retrorgb.com/osscarcadetimings.html

They also work well for adapting things like sony zn-* to output in stereo either in a cab or outputting to a home entertainment amp, etc.

Theres other examples of difficulty being lower on Japanese compared to US (and possibly other regions), but not as notable as super x compared to ST as noted above. Alpha 2/Zero 2 is another example.

A logic probe would be quicker than multimeter. Go around and check each pin. If you find one floating then you can check the spreadsheet to see if it should have activity. Sometimes ic's will be acting up and that can be heard via the probe - the signal sounds abnormal, not rhythmic...

Sheep_nova on here has (or had) replacement c boards for sell. Not sure how his stock is, but I'd recommend him if he has the c board you are needing.

Spent the morning dialing in this TC-A252S. I set the B+ VR to where it was from the factory. I was able to line it up reasonably well from the hot glue residual left behind, and had a good picture of it to corroborate. Re-hot-glued it and walked away. Frankly the thing I was chasing - some...

I'm happy to report that this chassis is working again. I found the fuse at F1 blown. I had nabbed a parts A292 chassis (29" version), and proved the cab was otherwise working, with the A292 chassis. These chassis look identical and from everything I compared, all parts are identical. In the...

Just providing the update that I got a Rondo HD15-2-SCART and it works great with the NAC Splitfire to RT5X. I now have all of my NAC Splitfire use cases covered. Very excited to be able to output arcade boards easily to the RT5X with glorious crt simulation. :)

Purchased a capcom CPS-b-21 C board for a sf2 champion edition B board that I bought years ago as B board only. Received the C board very quickly and it works great. Quite inexpensive too. Thank you sheep_nova!

Thanks nem. I traced out that circuit. C67 is grounded on one side and goes through pin 2 of the STK79915. There's no data sheet for the STK79915, but the STK79315 looks to be comparable. https://www.alldatasheet.com/datasheet-pdf/pdf/41668/SANYO/STK79315.html I make that assumption based...

After a lot of poking, I think I've isolated the issue to this transformer. touching it with a non-conductive pair of tweezers, I can feel it vibrating in conjunction with the squealing. I haven't found any info online on this component. If I knew what the 'Q' logo stood for - assuming that's a...

I have a Neo 25 w/ Toshiba A59JMZ90X and Toei TC-A252S chassis. I recapped the power supply a few months back, no issues. I decided to pull the Toei chassis to recap it, due to developing some noise/interference in the image. Otherwise, the monitor/chassis have worked great for as long as...

Yeah, I'm aware of that product, but it's out of stock. So, I've been trying different options for making my own SCART cable/connection, all with the same result of oversaturated/bleeding colors and dropped sync, on RT5X, CRT and OSSC SCART input. Per the Splitfire product page, sync output...

Yes using a multimeter to test voltage on the vcc pin of one or more of the chips.

How many A boards and how many B boards have you tested with? Have you tried a different monitor, supergun, etc? 5V should be at 5.00V when tested at chips in the middle of the B board which are theoretically the furthest from the power source. Chips nearer the jamma connector on the A board...

Try degaussing?

Same as with most cps-1 graphical issues - it's the c board custom or the a board custom or both. Start by swapping a boards and c boards if you have other games. The cps-b-** custom on the c board must be the same on the test board as on the original. Any version of the a board will work...

Can anyone offer guidance on building a VGA to SCART cable for the Spitfire, for use with OSSC and Retrotink 5X? I had a beatup genesis 1 scart cable lying around, so cut the genesis connector (that was the beat up part...it was basically unuseable) and soldered wires to a male VGA head per the...

Apocalypse used to provide the service of providing the files with necessary code modifications to work with your particular hardware configuration. You would need to provide and burn the roms and gal(s), or find someone else to provide that service...

^and c boards are a close runner up if not a tie for custom chip faultiness.