Hantarex monitor picky about input signals (sync problem?)

[dennis808]

Im trying to hook up a Hanterex MTC21EQ monitor to some of my consoles (PlayStation2, Dreamcast).
I believe this is a type of monitor that is being used in surveillance, editing, or point-of-purchase environments, since it sports a wealth of options on the back as you can see in this pic:


and a close-up:


I mainly bought this monitor to replace the old Mitsubishi TV which I have in my cabinet right now.
Here's a pic of the Mitsubishi TV hooked up to a Dreamcast with a RGB-SCART cable:


Since the Hantarex also has a SCART socket (which accepts RGB signal) I thought it would be an easy swap. But the only picture I'm getting (even after adjusting all of the pots) is this:


really sharp, but completely scrambled 

Both the Dreamcast and the Playstation2 give these type of images when I connect them via RGB-SCART cables.
When I connect the consoles via composite (the yellow RCA plug) I get a stable image, but without the nice quality of an RGB connection:


What REALLY confuses me is that when I hook up my DVD-player via RGB-SCART, it gives me a stable and clear picture 


Is this a sync issue? And if so, why is my DVD-player's image visible while it's outputting the same type of signal?
Please someone help me so I can use this Hantarex in it's full RGB glory...

[grantspain]

try tweeking your hor phase pot next to the scart,its possible the frequency is slightly different

[dennis808]

I tried adjusting the Hor Phase, but it only made the bars move a little bit slower or faster.
When I change the priority switch, I can see flashes of sharp and stable images, so it must definitely be possible to display a proper image.

[grantspain]

thats def sinc problem,maybe its a bad scart lead or dry joints on the socket.whats that 75 ohms switch do when you press it?

[dennis808]

The strange thing is, that both consoles are working when using the SCART input on the TV that's in the cab.
And the DVD-players works correctly when connected via RGB-SCARt on the Hantarex.

The 75Ohm button gives a little jump in the picture when I push it, but no change.
Could the sync signal coming from the consoles be too weak?

[grantspain]

obviously you have checked those other two buttons,sinc and analogue

[conkerkrusher]

dvd player is running progressive scan correct? the ps2 isnt and niether is the dreamcast.

[dennis808]

dvd player is running progressive scan correct? the ps2 isnt and niether is the dreamcast.

I really doubt that my (cheap) Samsung DVD-player outputs a progressive signal, since it is normally hooked up to a non-progressive TV.
I have one PS2 game that can be set to progressisve output, so I will surely try that ASAP.

[sav1]

dennis,
that the same hantarex monitor i have. when i first hooked up my pc with a arcadevga and homemade vga to scart it gave the exact same picture.
i went to this link which shows the hantarex pinouts : http://www.hantarex.com/pdf/MGGEQ3.pdf

I had originally copied a vga to scart cable from the net. It used a composite sinc which the hantarex does'nt accept. the hantarex needs a seperate horizontal and vertical sync. (pins 10 and 12). I assume that is what the "HV" stands for in the "Analog RGB-HV" above the scart connector on the back of your monitor.
once i rewired the H and V syncs from the vga to the scart the picture was perfect.
I would say your dvd player outputs the syncs seperately thats why it works.
cheers,
sav

[dennis808]

WOW! I never expected any more replies on this post. Thanks a bunch for your reply!
Sounds like a really viable solution.
The only caveat is that next to the PC I also have a Dreamcast and a PS2 in my cab that I would like to hook up via RGB-Scart. Is there a way to make those machines send out separate H+V sync?