Crt or jamma board

[Pharo]

Hi all was playing double dragon today in my cab and I noticed these lines on the screen is this to do with the crt or the board I don't think I've noticed it before but I'm not sure as i can only see it on a dark background.
Cheers Brian

 

[Lurch666]

That's your CRT.

 

[Pharo]

Thanks for the reply I kinda thought that so my next question is how do I sort it or do I just leave it how it is.
Cheers Brian

 

[Lurch666]

Looks to me like your contrast or brightness is too high.
But I'm no expert on CRTs.

 

[Jacmar]

I had this on my cabinet, I think they're called raster lines. You can dial them out, well I did anyway.
I followed this youtube video ....

he gets to the adjustment setup part around 26 mins in . worked great for my monitor ... assume it works the same on most CRT's
(I'm no expert on CRT's either)

 

[channel27]

You're seeing retrace lines because the "Screen" control on the flyback needs turning down