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Main => Monitor/Video Forum => Topic started by: dennis808 on April 10, 2006, 10:42:06 am

Title: Hantarex monitor picky about input signals (sync problem?)
Post by: dennis808 on April 10, 2006, 10:42:06 am

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:
(http://control-freak.nl/images/arcade/hantarex/00_hantarex.jpg)

and a close-up:
(http://control-freak.nl/images/arcade/hantarex/01_controls.jpg)

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:
(http://control-freak.nl/images/arcade/hantarex/02_tv_rgb_scart.jpg)

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:
(http://control-freak.nl/images/arcade/hantarex/03_hantarex_rgb_scart.jpg)

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:
(http://control-freak.nl/images/arcade/hantarex/04_composite_ps2.jpg)

What REALLY confuses me is that when I hook up my DVD-player via RGB-SCART, it gives me a stable and clear picture  ???
(http://control-freak.nl/images/arcade/hantarex/05_dvd_rgb_scart.jpg)

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...

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: grantspain on April 10, 2006, 02:20:44 pm

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

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: dennis808 on April 10, 2006, 04:55:35 pm

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.

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: grantspain on April 10, 2006, 05:42:27 pm

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?

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: dennis808 on April 10, 2006, 07:52:41 pm

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?

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: grantspain on April 11, 2006, 11:51:36 am

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

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: conkerkrusher on April 11, 2006, 01:42:47 pm

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

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: dennis808 on April 14, 2006, 04:11:33 pm

Quote

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.

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: sav1 on August 09, 2006, 10:19:21 pm

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

Title: Re: Hantarex monitor picky about input signals (sync problem?)
Post by: dennis808 on August 10, 2006, 04:23:40 am

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?