Crash Course - How to use a TV for monitor.

[Muerto]

thanks! - i will solder the 5V later today, fingers crossed!

[Muerto]

hey, what do you know, +5 helped! (now there´s only some colors missing...) any way to correct this?
does Ground (GND) have somthing to do with that?











AND..

When i test DK-DKJ-DK3 the screen rolls like crazy (im using a NIN to JAMMA adaptor..)

[level42]

What colors are missing then, I see Red, Green and Blue....

The sync problem > SCART requires composite sync. Not sure if that comes out of that adapter ? Else you'll have to combine H- and V-sync signals.

[Muerto]

ok, RGB is present on all pictures, but if you see at the clouds on the Wonderboy screen, and the eyes on the Snow bros main screen and top of platforms... there´s somthing wrong...

[DarthNuno]

Except the 'WonderBoy in MonsterLand picture', the colors on others games seems to be inverted?!
Maybe you're inverting some colors? Try to swaps the three color wires? (I mean maybe you're sending the blue signal from the board into the green input of the TV for example...)

I've also have similar thing... the 'Brightness?' potentiometer (one of the two pot close to the high voltage, usually in black) was too high, and in some part of the screen, some areas were 'color saturate'...

[Muerto]

actually bruno, WIM is the closest to be perfect, only some minor issues there...

actually, it´s the white color there´s missing:

-EDIT- or maby youre right, somthin´s inverted!




KLOV:

[level42]

But the top line (score, 1up, 2up) seem to be the right color.....

Sorry I didn't notice earlier, I don't know these games.


Try a test-screen on one of the boards with RGB so you can be sure....

[Muerto]

this is strange!
When i slap in my Silk Worm PCB, the colors are perfect!... hmmm

Another question:
How do i force the TV to start up on the SCART channel?

[DarthNuno]

Another question:
How do i force the TV to start up on the SCART channel?

  12v in the pin 8 

[Muerto]

... that was easy! thanks! 

[mchay]

Looking at the images explaining what to connect to which pins on the scart connector - I'm not quite sure how to make a test setup with a TV for my Centipede board.

The pinout is as follows:

http://www.ggdb.com/KB.aspx?c=Coin-Op&s=Arcade&vid=503&kb=44

There are no Red/Green/Blue grounds mentioned in this pinout table. Is it just connecting the RGB and the composite sync from the board and it's a done deal?
Maybe the Video return pin on the board has to be connected somewhere?

I'm sorry to bring up an old post - but it seemed relevant for my question.

[italiandoh]

There are no Red/Green/Blue grounds mentioned in this pinout table. Is it just connecting the RGB and the composite sync from the board and it's a done deal?

No.

Maybe the Video return pin on the board has to be connected somewhere?

Yes, video return = video ground, so connect all three R, G and B grounds together to video return. It is also probably a good idea to connect it to the power supply ground too.

Matteo