Mahou Daisakusen won't play properly on my TV

RuffNEC · Post by **RuffNEC** » Thu Jan 29, 2009 8:45 pm

as you can see in the following youtube vid

http://www.youtube.com/watch?v=g2JoEQEMlUc

the screen turn something green when there are light collors on screen. What could this mean ? I don't have any problems with some older toaplan pcbs like vimana, truxton II etc.. does this Game uses a different Resolution or refreshrate?

robivy64 · Post by **robivy64** » Thu Jan 29, 2009 10:49 pm

First and foremost, never ever EVER set an arcade board on carpet, especially while running. Static can ruin your board.

It's difficult to determine the problem if the board is not properly handled.

Strider77 · Post by **Strider77** » Fri Jan 30, 2009 12:06 am

LOL @ PCB on carpet

PC Engine Fan X! · Post by **PC Engine Fan X!** » Fri Jan 30, 2009 12:18 am

Strider77 wrote:LOL @ PCB on carpet

Yep, one of the ol' standbys of the arcade PCB hobby is to never boot up/play your expensive PCB on the carpet. Lest it fall to the ravages of Mr. Static electricity and see your precious PCB go up in smoke. ^_~

Sure, I've had a couple of expensive PCB/mobos go up in smoke because of accidental static discharge. They end up being nice looking pieces of PCB artwork to admire from a distance. And equally suitable for framing. ^_~

Can you imagine the horror/shock of losing a perfectly good expensive DDP-DFK PCB to static discharge? You can kiss your hard-earned $$$ good bye in that situation. Is it about time to buy another one as a replacement? ^_~

The general rule of thumb is to make sure your PCBs aren't placed anywhere that static build-up might occur.

kernow · Post by **kernow** » Fri Jan 30, 2009 12:46 am

robivy64 · Post by **robivy64** » Fri Jan 30, 2009 12:48 am

Some of the people in this hobby never cease to amaze me...

Post by **Dave_K.** » Fri Jan 30, 2009 1:34 am

RuffNEC wrote:the screen turn something green when there are light collors on screen. What could this mean ? I don't have any problems with some older toaplan pcbs like vimana, truxton II etc.. does this Game uses a different Resolution or refreshrate?

It most likely means that you have a crappy RGB->NTSC encoder in your supergun. The refresh is supposed to be 60hz on that game, so thats not it, probably the colors are just too hot for NTSC. Try running it in a cab to confirm the board is fine.

dpful · Post by **dpful** » Fri Jan 30, 2009 7:34 am

looks like the board must run a little hot and blitz the encoder- or the tv's. Does it have a voltage adjust? A little less on the 5v might bring down the contrast a little and fix it.

Seems like it wouldn't be the board, but the supergun or the monitor.

RuffNEC · Post by **RuffNEC** » Fri Jan 30, 2009 6:05 pm

thanks for the static tip, I'm a newbee to PCBs...

My supergun doesn't have a 5v voltage control

btw: which material is good for non static response ?

PC Engine Fan X! · Post by **PC Engine Fan X!** » Sat Jan 31, 2009 1:57 pm

RuffNEC wrote:thanks for the static tip, I'm a newbee to PCBs...

My supergun doesn't have a 5v voltage control

btw: which material is good for non static response ?

For RuffNEC,

There's always something new to learn when it comes to the arcade PCB hobby. ^_~

Place your PCBs on top of a table works wonders for me or on top of anti-static poly bags would work in your situation as well.

PC Engine Fan X! ^_~

RuffNEC · Post by **RuffNEC** » Sat Jan 31, 2009 3:39 pm

ok thanks for the advice

Tested the game now on a RGB LCD Screen... fine picture there so it can't be the MAK Supergun.

it seems that my CRT TV 4:3 just can't handle the game... i need scanlines so i won't play on the LCD.

robivy64 · Post by **robivy64** » Sat Jan 31, 2009 7:19 pm

Despite what ~_^ said, setting the board ON a static bag is also NOT a good idea. The static can collect around the outside of a static bag.

Any non-conductive surface is fine. If I am testing a board outside of the cab, I have a piece of hard plastic that I set the board on.

Also, make sure you ground yourself by touching grounded metal before handling the PCB. Don't wear socks while on carpet and grab the board, etc...

You just have to use basic common sense really. Keep in mind that these are sensitive circuit boards and not Super Nintendo carts.

dpful · Post by **dpful** » Sat Jan 31, 2009 7:35 pm

I've never set a board down. I lean it against something standing up. I gues I treat it like you'd treat a vinyl record. THat's only untill I can get inside some case or box, or mounted to a board. If I do have to set it down (inside a cab or something), I'll set on on paper or a piece of cardboard.

Also, adjust ing the contrast/brighness on the TV could solve the problem- maybe the game could run a little dimmer. If you could stop on or find a bright image in the game and then turn down the contrast/rgb/brightness (or whatever your tv has- it's a contrast issue) until it looks OK, then see if the rest of the game looks OK.

If there's a knob just for the green, maybe that's the only broblem?
There could also be adjustments for individual red blue and green inside the TV if you wanted to look in there.

shmups.system11.org

Mahou Daisakusen won't play properly on my TV

Mahou Daisakusen won't play properly on my TV

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