Wavy lines top of Screen - BVM-D32E1WU

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Michael Ikonomidis
Posts: 42
Joined: Tue Nov 29, 2016 6:50 pm

Wavy lines top of Screen - BVM-D32E1WU

Post by Michael Ikonomidis »

The top inch or so of screen has wavy lines (see pics). I've tried various settings (H Phase, P Pin, etc) but nothing seems to change it.

Any help would be appreciated.

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xga
Posts: 205
Joined: Thu Jun 04, 2015 12:59 am

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by xga »

Potentially caps on the deflection board or the RGB input board.

Do you get the same display issue when using a different input other than RGB?
Michael Ikonomidis
Posts: 42
Joined: Tue Nov 29, 2016 6:50 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by Michael Ikonomidis »

xga wrote:Potentially caps on the deflection board or the RGB input board.

Do you get the same display issue when using a different input other than RGB?
Haven't yet but will, and will post result. Thanks
Michael Ikonomidis
Posts: 42
Joined: Tue Nov 29, 2016 6:50 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by Michael Ikonomidis »

Found this is specific to the Neo Geo.

Tried PS1 and PS2 on the same RGB input as Neo (they all go through a switch box). No wavy lines.

Tried PS1 and PS2 on Composite input, no wavy lines. Tried Neo on Composite, wavy lines.

I did find this page which mentions a similar issue, which was fixed by tweaking VSYNC (?) but I have yet to find any such setting on the BVM.

http://www.neo-geo.com/forums/showthrea ... VS-and-AES

(Side note: this monitor brings out all the flaws on composite and *really* shows you how bad it looks. :shock: )
xga
Posts: 205
Joined: Thu Jun 04, 2015 12:59 am

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by xga »

The bloody AES and MVS systems with their slightly off spec video signals.

Have you tried enabling the VCR option in the extended menu on your D32 to see if that makes a difference?
andy251203
Posts: 155
Joined: Tue Feb 05, 2008 9:22 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by andy251203 »

The Neo Geo AES systems are known to have wonky sync signals. I had a similar issue with RGB capture and also displaying on a BVM-1911. You can try using a sync cleaner or try enabling the hidden VCR mode in the maintenance menu.
philexile
Posts: 425
Joined: Fri Feb 26, 2010 8:22 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by philexile »

Michael Ikonomidis wrote:Found this is specific to the Neo Geo.
(Side note: this monitor brings out all the flaws on composite and *really* shows you how bad it looks. :shock: )
Try using the different comb filters that are available for composite input. The options are in one of the onscreen menus.

You'll be surprised how good it can make a composite signal look. It won't be RGB, but it is very impressive for what it is.
Michael Ikonomidis
Posts: 42
Joined: Tue Nov 29, 2016 6:50 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by Michael Ikonomidis »

xga wrote:The bloody AES and MVS systems with their slightly off spec video signals.

Have you tried enabling the VCR option in the extended menu on your D32 to see if that makes a difference?
Wasn't aware of that option. I'll try that thanks
Michael Ikonomidis
Posts: 42
Joined: Tue Nov 29, 2016 6:50 pm

Re: Wavy lines top of Screen - BVM-D32E1WU

Post by Michael Ikonomidis »

philexile wrote:
Michael Ikonomidis wrote:Found this is specific to the Neo Geo.
(Side note: this monitor brings out all the flaws on composite and *really* shows you how bad it looks. :shock: )
Try using the different comb filters that are available for composite input. The options are in one of the onscreen menus.

You'll be surprised how good it can make a composite signal look. It won't be RGB, but it is very impressive for what it is.
I'll give that a try as well TY
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