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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sat Oct 17, 2020 8:44 am 



Joined: 31 Mar 2020
Posts: 47
Huh. Yeah mine is an NTSC US console playing NTSC US games, with exception to Project J2. The BVM handles both PAL and NTSC.
I had the simple RGB mod performed since the N64 is an earlier unit.

Everything looks great except for those 2 titles that switch resolutions- and it’s not even the entire game- just the higher resolution screens.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sat Oct 17, 2020 12:37 pm 



Joined: 13 Jul 2016
Posts: 88
jwrose wrote:
Running it through the Extron RGB fixes it (just like with the AES and PCE)..


Could you please provide the name of the Extron RGB unit that fixes this issue? I presume you use it to fix the skew issue of the AES too?


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sat Oct 17, 2020 5:24 pm 



Joined: 31 Mar 2020
Posts: 47
Yep! It’s the Extron rgb 203rxi. I use the SERR feature. It fixes AES, TG/PCE, Perfect Dark n64. It doesn’t fix SMS.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Oct 21, 2020 6:11 pm 



Joined: 28 Jun 2016
Posts: 8
I have a found a solution for SMS. I am using a japanese Master System.

Image


I am using two devices from Arcadeforge. Sending the signal from the SMS through the Sync strike, then generating new sync with the UMSA.
Japanese SMS > Sync strike > UMSA > rgb-scart-cable to BNC > BVM D14H1E.

I will test this on my X68K soon.

8)


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sat Oct 24, 2020 5:38 pm 



Joined: 31 Mar 2020
Posts: 47
Interesting! Any chance you could post an image of that chain? I’m just curious to see what cables are being used between everything since it looks like each of those devices only had a single Scart socket.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sun Oct 25, 2020 8:26 am 



Joined: 28 Jun 2016
Posts: 8
I am not at home right now to take a picture, but I made a quick sketch:

Image

Sending the signal through the syncstrike only almost works, image is correct but with tiny flickers. The UMSA makes it 100% stable and clear.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sun Oct 25, 2020 8:36 am 



Joined: 31 Mar 2020
Posts: 47
Got it! Thank you! That clarified my confusion- so, you use VGA to link them. I may have to check into a USMA and Sync Strike. I hadn’t heard of USMAs before. Anything I should know about buying them? (I.e. reputable retailers, knockoffs, etc)

Thanks again!


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sun Oct 25, 2020 8:44 am 



Joined: 28 Jun 2016
Posts: 8
here is the link:
http://arcadeforge.net/UMSA/UMSA-Ultima ... r::57.html

ArcadeForge, based in Germany I think.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Tue Oct 27, 2020 2:24 pm 



Joined: 05 Dec 2012
Posts: 507
So, this is essentially converting RGBs to RGBHV. then back from RGBHV to RGBs. I'm surprised this works, but if that's the case, we can probably design a board that does exactly this and outputs via a dsub connector, so you can use a really cheap "VGA to BNC" cable to connect to your monitor. We'd want to verify compatibility with all consoles, as well as double check that this isn't spiking the sync voltage too high.

I also have another solution being mailed to me that's testing a different way of changing the sync. If that works, it'll be easier than this. I'm glad people other than me are still testing and experimenting though!!! :)


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Tue Oct 27, 2020 3:03 pm 



Joined: 31 Mar 2020
Posts: 47
retrorgb wrote:
I also have another solution being mailed to me that's testing a different way of changing the sync. If that works, it'll be easier than this. I'm glad people other than me are still testing and experimenting though!!! :)


Great! Glad to hear you’re still looking into this! I’ve been waiting in hopes of a permanent solution. I’ve been holding off for awhile on getting my SMS recapped just in case a mod became available. Keep us posted on what you figure out!!


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Oct 28, 2020 5:46 am 



Joined: 28 Jun 2016
Posts: 8
retrorgb wrote:
We'd want to verify compatibility with all consoles, as well as double check that this isn't spiking the sync voltage too high.



My AES is a low serial Pal version with no issues so I can't test that. I have no chance to test a PCE at the moment. How can I check the sync voltage?


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sat Oct 31, 2020 6:56 pm 



Joined: 13 Jul 2016
Posts: 88
korpskytten wrote:
retrorgb wrote:
We'd want to verify compatibility with all consoles, as well as double check that this isn't spiking the sync voltage too high.



My AES is a low serial Pal version with no issues so I can't test that. I have no chance to test a PCE at the moment. How can I check the sync voltage?


My guess is that you'll want a cheap multimeter (many avaliable on amazon), I would select the 20V continous mode, put one end into the BNC sync and ground the other one.

Have you tested with the BKM-68x yet? I'm eager to learn about the results, I'm in europe and could order the UMSA+Sync strike soon for further testing if proven to work.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Mon Nov 02, 2020 2:27 pm 



Joined: 05 Dec 2012
Posts: 507
No, you can't check video signal voltage with a multimeter, you'd need an oscilloscope. Here's all the info I have and the first video with Ste should explain it all: https://www.retrorgb.com/oscilloscope.html


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Tue Nov 03, 2020 9:27 am 



Joined: 28 Jun 2016
Posts: 8
Ok, sorry I don't have an oscilloscope at hand.

Quote:
Have you tested with the BKM-68x yet? I'm eager to learn about the results, I'm in europe and could order the UMSA+Sync strike soon for further testing if proven to work.


I have got a BVM A20 but no BKM-68X. What I said I would test was the Sharp X68K / X68000. It is known for strange sync signals and non-compatible with BVM-series in general. I have tested THAT a bit and it seems to work well so far. But the sync differs from different games so I will make some more testing on this.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Sun Nov 15, 2020 5:50 pm 



Joined: 03 Nov 2020
Posts: 3
Does anyone have experience with HV no longer turning on after a bad sync on a D14? I put bad signals into Skum’s 129X from an Easycel HDMI to component adapter. The monitor has 6000 hours on it and was manufactured in 2002. No burn marks or smells, no dust, no bulged caps, no irregular junction voltage drops, no blown fuses. On power on the neon bulb across the FBT flashes twice. I think the free running horizontal frequency is out of spec and trips a protection circuit, causing the HV to shut off (the second flash).

I’ve tried unplugging all boards, removing the M assembly (ISR) watch battery, discharging the parallel cap, plugging everything back in, then powering on.

I’ve tried different combinations of input cards being fed valid signals.

I have attempted factory resets. I am pretty sure I am getting into the password-locked maintenance menu because it takes an extra second to power off after I use one of the password candidates (1111) compared to the others (0000, 9999). Once in the maintenance menu I scroll down 5 times and hit enter a few times. Does anyone know if this is the correct procedure?

Sony won’t give me the serial interface software without filling out a form that includes the vendor the monitor was acquired from. They’re clearly saying they won’t help secondhand owners.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Mon Nov 16, 2020 6:46 pm 



Joined: 28 Jun 2016
Posts: 8
News on the SyncStrike + UMSA. PCE tested with perfect picture result. Also added a picture of the two devices connected.

Image

Image


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Thu Nov 19, 2020 11:14 pm 



Joined: 13 Jul 2016
Posts: 88
korpskytten wrote:
News on the SyncStrike + UMSA. PCE tested with perfect picture result. Also added a picture of the two devices connected


Nice, I've seen no sync issues with my THS7374 RGB moded PC Engine DUO XR and BKM68X but it is nice to know that it is also possible to play the first PCE console too.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Fri Nov 20, 2020 12:10 am 



Joined: 31 Mar 2020
Posts: 47
Nice. I may pull the trigger since this seems to fix SMS, PC Engine, and (likely) Neo Geo AES. Currently I’m using an Extron RGB, but that only fixes PC Engine and Neo Geo.


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Nov 25, 2020 8:21 am 



Joined: 28 Jun 2016
Posts: 8
I have now also tried it with an Extron crosspoint and the signal goes through it without problems. So you can have the SynkStrike/UMSA before the crosspoint in your setup.
Only issue I have got now is that the UMSA only takes 15khz signals, so I will still have to use the 203 Rxi with the SERR function AFTER the crosspoint for 30khz/24khz signals from the Sharp X68k and the Naomi. Does anyone have experience with other component Matrix-solutions like the ones from Kramer in combination with the Extron 203 Rxi?


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Nov 25, 2020 7:44 pm 



Joined: 05 Dec 2012
Posts: 507
I just tried something kinda neat:

RetroTINK 2x Pro or 2x M in Passthrough mode -> *HDMI to VGA converter -> Extron 203Rxi with SERR turned on -> monitor

That actually worked with an added bonus: composite, S-Video and component video all passed through. Composite through the M looked good too, cause of the comb filter. I forgot to test 480p through the M though, but it should work for component video sources.

We're still working on the other solution, but I wanted to pass that along in case anyone else happens to have those same components and can try.

*I just used the cheap HDMI to VGA "cable" I have linked here: https://www.amazon.com/shop/retrorgb?li ... 72N6BL06SV


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Nov 25, 2020 7:58 pm 



Joined: 31 Mar 2020
Posts: 47
korpskytten wrote:
I have now also tried it with an Extron crosspoint and the signal goes through it without problems. So you can have the SynkStrike/UMSA before the crosspoint in your setup.
Only issue I have got now is that the UMSA only takes 15khz signals, so I will still have to use the 203 Rxi with the SERR function AFTER the crosspoint for 30khz/24khz signals from the Sharp X68k and the Naomi. Does anyone have experience with other component Matrix-solutions like the ones from Kramer in combination with the Extron 203 Rxi?


Was this with a Master System?


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Nov 25, 2020 8:01 pm 



Joined: 05 Dec 2012
Posts: 507
Yes


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Wed Nov 25, 2020 8:46 pm 



Joined: 31 Mar 2020
Posts: 47
retrorgb wrote:
Yes

Sorry, that was meant for korpskytten- but I do have a question on yours - did it come through at 240p for RGB?


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 Post subject: Re: BVM-A20F1M Sega consoles Sync problems
PostPosted: Thu Nov 26, 2020 8:33 am 



Joined: 28 Jun 2016
Posts: 8
jwrose wrote:
Was this with a Master System?



Yes. Japanese MS and PCE.


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