Sega-Naomi

Hi everyone,



I'm 33 years old and been some years into arcade collecting. As I'm now a proud owner of a NUC (which I instantly chopped) I thought I'd register to this great forum .







The Cabinet works fine with a Naomi 2 mobo, never had any problems, all the voltages are correct and I can regulate the +5V and the 3,3V.



Now I recently purchased a Hotd2 lot (game, mobo, gun board, sensors + type 2 guns). This is my test-setup:









The game works, also the test + service buttons on the mobo are working - but the guns don't react and the trigger won't work. It seems the gun mark is always stuck in the upper left corner. In the gun mark checking I get this:







Is there anything I can do to find out what's wrong?



Thanks for your help!

Faulty gunboard perhaps?

Hi,



I'm not sure. If I connect the x and y-axes-pins via ground on the 9-pin-connector of the gun board (labeled with "out") the gun mark starts moving.



Is there a way to verify that the gun board is definitely faulty? Maybe it's "just" the guns or the sensor bar? I'm willing to invest a lot of money to get it working, but I want to make sure first that I only replace the faulty parts .

Can you see the IR sensors light up?



You should be able to see two faint red lights from each IR sensor



Bob Presutti

Yes look at the gun sensors using your mobile phone camera, as you look through at each sensor you should see the infra red light

Ah, I made some progress ! It seems I missunderstood the functioning of the i/o-board. I thought it provides 12 V via the cn2-connector but thats just the INPUT (!), besides of it is the OUTPUT via cbn 1! Now I've connected the 12 V input and also the 12 V output for the gun board. The x/y-axes are now working ! Jeez, that saved my week!



Will now try to build a quick setup to fix the LED-bars in more accurate way around the screen and then try to calibrate the guns .



Thanks for your help so far, guys. I will keep on posting.

SkiDog wrote:Can you see the IR sensors light up?



You should be able to see two faint red lights from each IR sensor

You can get a better view through a digital/mobile phone camera.

With a now powered gun board I can see the LEDs without help , everything seems to be in order. Gun 1 is working almost cool, gun 2 is still a little off the screen and needs finetuning.



2nd test setup: I built a little extra bezel to calibrate the guns:









Next step will be drilling holes in the original NUC bezel and screw the sensor bar in.



PS: Yeehah! I just killed my first zombie!

BTW, Nice chop job on the NUC



Bob Presutti

I believe I got two gun bezels left.. Already have the wholes drilled out..



Suitable for Sanwa 31ES and other curved monitors.