Fudoh wrote:You have to find out if the problem is with the XRGB or the monitor. In B1 the output sync is locked to the input sync signal. It's possible that the XRGB works fine, but your BenQ doesn't sync when the PCE is on (can you try the PCE/XRGB combo on a different VGA monitor?). The other possibility is an incompatibility of the used RGB booster and the XRGB in B1, but since it works fine in B0, I would more or less suspect the monitor. This can still be fixed be altering the PCE's signal though. Eventually this is the same problem which causes the incompatibility between most PCE amps and the FX2 linedoublers. (I'd suggest you email Moosmann about this. He has fixed a couple of PCEs to make them work on such setups.)
I guessed so So he should know what components he used and what's missing to gain XRGB compatibility. Nevertheless give a try on a different VGA display first.
I'm not a XRGB-3 user, but as for the PCE sync problem:
After building the amp for the sync-line in my DUO R the Vigatec had trouble keeping the picture steady, so I just built an adaptor for the C-Sync with an integrated 1k ohm pot - after turning the pot at approx 180 ohm the picture was *perfect*. So, it looks like my amp was a bit too strong.
I don't know if that bit was of any help, but I think getting together an adaptor like that is surely a versatile solution if one knows how to solder a simple trimmer/pot and a few wires.
ZOM wrote:I'm not a XRGB-3 user, but as for the PCE sync problem:
After building the amp for the sync-line in my DUO R the Vigatec had trouble keeping the picture steady, so I just built an adapter for the C-Sync with an integrated 1k ohm pot - after turning the pot at approx 180 ohm the picture was *perfect*. So, it looks like my amp was a bit too strong.
I don't know if that bit was of any help, but I think getting together an adapter like that is surely a versatile solution if one knows how to solder a simple trimmer/pot and a few wires.
So you added a trim pot to the csync output from an amp, or directly from the Hu6260? Fudoh and I have similar amps (based off of the same IC), but I amplify csync, his uses composite video directly. Using composite video as sync causes problems with the XRGB-3. So, looks like I need a separate buffer circuit for csync to get perfect (close enough for me) B1 operation (B0 is fine with amped csync).
Trim pot added to C-Sync coming from the amp I built following that Japanese magazine's schematics, except that I used a different transistor - I think that's the cause why my amp was a bit strong.
ZOM wrote:Trim pot added to C-Sync coming from the amp I built following that Japanese magazine's schematics, except that I used a different transistor - I think that's the cause why my amp was a bit strong.
Ahh yes... the GamesX 2SC1815 amp! Time to upgrade to a NJM2267 based amp... it's a dramatic improvement!
EDIT: Is it this one here: http://baku.homeunix.net/RGB/PCE_DuoRX/PCE_DuoRX.html ? Looks interesting, at least he uses a real video amp - this poses the question how hard they are to obtain in cheese&chocolate land... -_-
EDIT2: Sorry if we're going a bit off-topic here...
I have troubles keeping the right colour for each system.
I miss something like to load configs for each system. Its a pain to adjust every time for each console the right setting. How do you do that? Have you got written all settings up?
Could there be a config loader in the future to be integrated in the firmware?
Oh thanks for the link, looks good! I'm a bit undecided tho - maybe I'll attempt the one I posted earlier first.
Looking at it a bit closer, it looks pretty similar to the other one...
EDIT: Ok, I got it now - It's a revamped version of the other one. Even the page says it's based on "Baku's" amp
I think I found new work to do in my beloved DUO R. Again, sorry for the short derail and thanks for the suggestions guys.
ZOM wrote:I'm not a XRGB-3 user, but as for the PCE sync problem:
After building the amp for the sync-line in my DUO R the Vigatec had trouble keeping the picture steady, so I just built an adaptor for the C-Sync with an integrated 1k ohm pot - after turning the pot at approx 180 ohm the picture was *perfect*. So, it looks like my amp was a bit too strong.
Could that work for other systems as well? Adding a pot to the chassis of the XRGB-3 should be easy enough and a great addition if it helps several consoles...?
ZOM wrote:I'm not a XRGB-3 user, but as for the PCE sync problem:
After building the amp for the sync-line in my DUO R the Vigatec had trouble keeping the picture steady, so I just built an adaptor for the C-Sync with an integrated 1k ohm pot - after turning the pot at approx 180 ohm the picture was *perfect*. So, it looks like my amp was a bit too strong.
Could that work for other systems as well? Adding a pot to the chassis of the XRGB-3 should be easy enough and a great addition if it helps several consoles...?
I think I'd be better to add the appropriate resistor(s) to the cable and or amp instead... since the needs of each system are different, adding a pot to the XRGB would likely only introduce other problems (noise). If it ain't broke, don't fix it! (the XRGB that is).
Oh thanks for the link, looks good! I'm a bit undecided tho - maybe I'll attempt the one I posted earlier first.
Looking at it a bit closer, it looks pretty similar to the other one...
EDIT: Ok, I got it now - It's a revamped version of the other one. Even the page says it's based on "Baku's" amp
I think I found new work to do in my beloved DUO R. Again, sorry for the short derail and thanks for the suggestions guys.
Yeah... the site was posted on the nfggames forum a while back and it was quite some time before people started reporting their own results. I went ahead and built the circuit with my own layout and component selections and created the wiki page to share. So, that page is just my results! Enjoy! I have assembled amps if you want to install one yourself....
yeah took me a while to notice that you are the author of that page
As for the pre-made ones, thanks but I really enjoy to do the soldering work on my own, even if i'm not a master at it.
Now if only those damn njm2267 were a bit easier to find. Any viable European replacements for those? From what I understand I "just" need 6db 75ohm video amps capable of two different inputs, right?
Fudoh wrote:You have to find out if the problem is with the XRGB or the monitor. In B1 the output sync is locked to the input sync signal. It's possible that the XRGB works fine, but your BenQ doesn't sync when the PCE is on (can you try the PCE/XRGB combo on a different VGA monitor?). The other possibility is an incompatibility of the used RGB booster and the XRGB in B1, but since it works fine in B0, I would more or less suspect the monitor. This can still be fixed be altering the PCE's signal though. Eventually this is the same problem which causes the incompatibility between most PCE amps and the FX2 linedoublers. (I'd suggest you email Moosmann about this. He has fixed a couple of PCEs to make them work on such setups.)
you were right it works on another older VGA Monitor. Model also from BENQ (FP731)
I get a very good picture there... have to switch the AFC Setting to 5 but afterwards I get a good picture. (appart from a shacking XRGB Menu)
why can't my newer monitor not display the PCE Engine Signal. How can I fix the SYNC Problem?
why can't my newer monitor not display the PCE Engine Signal. How can I fix the SYNC Problem?
I'm quite sure that it can still be fixed by changing the RGB amp on the Duo. As said, in B1 mode the sync signal is split up (from composite to seperate sync), but in general still passed through (speaking of the signal's waveform). I can't offer more details, sorry - just a vague theory at this moment...
There's red missing. Unplug the red RCA wire and it should stay the same. Probably defective D-Terminal adapter cable. To make sure it's not the D-terminal port you use, try another one....
You're right, unplugged the Red, its the same, I recall it being the same when I had tried his PSP with the other d-terminal ports with the cable, darn it no other way to try it for now
Unfortunately D-Terminal to RCA adapters are hard to find outside of japan. A Scart to Component adapter can be build very cheaply though, so this it likely your easiest way to get the system up and running fast and without investing lots of money. You just have to switch the Game21 Input from RGBs to Component in the menu.
It is just a friends Wii, I've also tried his PSP through component before and it had similar effects,
it has LPF off and is in B1 mode
Feeding component to an input expecting RGB causes that "type" of problem - or swapping red and blue connections. What is the model # of your Dell monitor?
175 here on my setup. 90 is very light, hardly visible depending on the display
does the effect lessen as you go down on yours? on mine the effect becomes stronger as I go up in value and the highest is "off"; lowest being "on". this is on a XRGB3. under 90 I don't see a difference as I go down.
Damn Tim, you know there are quite a few Americans out there who still lives in tents due to this shitty economy, and you're dropping loads on a single game which only last 20 min. Do you think it's fair? How much did you spend this time?
On mine the highest value is off (no scanlines) and the lowest is almost pure black scanlines (way too much IMO). Perhaps you need to reset your unit? It doesn't sound like it's working right to me.
you're right of course. Mixed this up in the reply on the last page. 90 should be very strong then. Kinda like the scanline emulation of the later Sega Ages titles (e.g. Fantasy Zone II DX). Real scanlines on a pure 15khz arcade monitor aren't that strong. The multi sync 15/31khz monitors built into the Egret 3 cabs had disturbingly strong scanlines though...
So i got my Gefen VGA to DVI scaler plus today. MegaDrive and Saturn both seem to work perfectly Master System Converter and Neo Geo MVS flashes a black screen every few seconds or so, while the sound playing normally in the background.
On my old tv i simply didn't get a picture in B1 mode when using SMSC or Neo Geo. At least now i get a fine looking picture that appears to be loosing sync every now and then. Switching various settings on the XRGB-3 did nothing. Any suggestions?
I haven't tried this with my Optoma yet but i don't see how that would change anything.
The coolest thing about the Gefen is that it accepts 50Hz from the XRGB-3 with scanlines and everything
Somebody must have solved this NG sync problem by now. You're not the only one having problems and you're not the only one having asked about it before. I also remember that the combination of a MVS and a XRGB running fine on somebody's setup. Maybe some kind of mod can be done to the sync signal. Similar to what ZOM did to his PCE to make it work on the Vigatec FX2 (see his posting above). I'm more than sure that this is fixable.
Good to hear that you're happy with the Gefen so far! Have you checked for the previous scaling problems (the different pixel width on Sonic MD for example or the weird moire pattern on Guilty Gear on Dreamcast) ? Do you have any problem with the Gefen's 1080p output or is it fine on the Panasonic ? Do you plan on letting the Gefen scale to 1080p ? What do think about the scaling - on it's own and by comparison to the Optoma ? The most useful thing I found was the correct recognition of the XRGB's B1 signal as 720x480 compared to 640x480 which eliminated the scaling errors on the PS2 480p titles (G5/OR2)....
My MegaDrive actually has a LM1881 in its RGB cable. Do you think i should try removing it?
Also switching between 50/60Hz on the console and V-sync On/Off on the XRGB makes no difference. Which is actually a good thing as i want to play in 60Hz with V-sync on whenever possible
So he should know what components he used and what's missing to gain XRGB compatibility. Nevertheless give a try on a different VGA display first.
Time to upgrade to a NJM2267 based amp... it's a dramatic improvement! 
no other way to try it for now
