Martial Champion PCB - Color Issues & No Sound

Raizen1984

Raizen1984

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Just got one of these in the mail today. Packed well and very clean; nothing noticeably wrong on the outside.

However, the color is completely messed up. I went into the test menu and found, through the color check option, that the Yellow and White bars were both Yellow, the Red and Magenta bars were both Red, the Green and Cyan bars were both Green, and the Blue bar was black. I can't seem to edit anything once I'm at this screen either.

Also there's no sound. No music, no sound effects, nothing. I tried messing with the Dip Switch for Stereo/Mono but that's a no go. Went into the Sound Check menu and turned the volume up as high as it would go. No dice.

I'm using a MAS Supernova to play this btw.

Any ideas guys? Need some help here.
 
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ttooddddyy

ttooddddyy

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Check for a cracked resistor array around the jamma edge, they sometimes get damaged in transit. That could cause weird colours. There is a resistor ladder circuit that sums up to drive the RGB outputs. One resistor O/C and it all goes to whack.

What happens if you turn the sound right uo - any buzz or hum audiable ?

edit: welcome to the forum Raizen1984
 
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Raizen1984

Raizen1984

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ttooddddyy said:
Check for a cracked resistor array around the jamma edge, they sometimes get damaged in transit. That could cause weird colours. There is a resistor ladder circuit that sums up to drive the RGB outputs. One resistor O/C and it all goes to whack.
Click to expand...

I don't know what a resistor array is. I'm looking at the board now though, and nothing looks cracked or otherwise damaged in any way. There isn't even much dust on the board.

ttooddddyy said:
What happens if you turn the sound right uo - any buzz or hum audiable ?
Click to expand...

Nope nothing. Turned my TV up all the way as well as the in-game audio. Nothing.

On a side note, I received another Konami game today and it's also giving me no audio. I'm wondering if this specific hardware requires something more besides just plugging the audio cables from the supergun to the TV. I believe it's Konami GX hardware, if that helps.

ttooddddyy said:
edit: welcome to the forum Raizen1984
Click to expand...

Thanks!
 
Xian Xi

Xian Xi

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I know the supernovas use an arcade PSU but do they hook up the -5v line?

Open the supernova see if the -5v output is hooked up.
 
Raizen1984

Raizen1984

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Xian Xi said:
I know the supernovas use an arcade PSU but do they hook up the -5v line?

Open the supernova see if the -5v output is hooked up.
Click to expand...

I don't really know what I'm looking at, but there's a black box in my supergun, and on the right side of it are a series of 8 'sections' with wires attached.

One of these sections is labeled -5V1A and, while the wires get a bit lost in the clutter, I believe it goes into the JAMMA harness (or the kick harness which I don't have; not sure).

Nonetheless, the wire does appear to be hooked up.

edit: I forgot to mention that I do get sound on my CPS2 Alien vs Predator board. It's just these latest two that I've been having problems with.
 
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ttooddddyy

ttooddddyy

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Xian Xi said:
I know the supernovas use an arcade PSU but do they hook up the -5v line?

Open the supernova see if the -5v output is hooked up.
Click to expand...

I stand to be corrected, but I do not think those boards use -5 volts ?
 
Xian Xi

Xian Xi

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Konami does sometimes.

Also have you tried adjusting the volume pot on the PCB?
 
Raizen1984

Raizen1984

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YES! FUCK YES! I now have audio on my Martial Champion board. Unfortunately, it's incredibly low. I had to change the output to Mono using a dipswitch and raise the volume in the test menu all the way up, as well as the volume on my TV all the way up. I'm now definately getting audio, but it's way too low. Anyone know why?


Xian Xi said:
Also have you tried adjusting the volume pot on the PCB?
Click to expand...

The manual states that there isn't a volume knob on the PCB itself. The volume needs to be changed in the test menu, which I already did.

I'm almost there! Just need a little more help!
 
Q

quoth09

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That game doesn't use -5v, as it doesn't have it listed on the JAMMA diagram. I really doubt this is the issue, but it wouldn't surprise me if it actually did need it and they just didn't list it in the manual, especially with Konami. No way to tell for sure unless Raizen1984 has access to another supergun or a cab with -5v wired up.

There is no volume pot on the PCB, as the volume settings are entirely in the test menu. I have had this board 1 time when I shipped it off for a friend and I didn't get any of the issues that Raizen1984 is getting here, but I also just tested it out for a minute to make sure it was still good to go, and didn't really do much playing, other than to make sure the controls were fine.

If you care to look at the manual, you can go here:
http://www.arcadedocs.com/vidmanuals/M/MartialChampions.pdf
 
ttooddddyy

ttooddddyy

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I have several Kanomi boards about a dozen. None of them use -5 volts.

This could be an electro cap in the audio output stage.
 
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Raizen1984

Raizen1984

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ttooddddyy said:
I have several Kanomi boards about a dozen. None of them use -5 volts.

This could be an electro cap in the audio output stage.
Click to expand...

Interesting. Do you know if this is something I could potentially fix, or is the board essentially caput as far as audio goes? It does seem like an odd coincidence that I would get two boards (both from Konami) that had the exact same issues.
 
ttooddddyy

ttooddddyy

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Raizen1984 said:
Interesting. Do you know if this is something I could potentially fix, or is the board essentially caput as far as audio goes? It does seem like an odd coincidence that I would get two boards (both from Konami) that had the exact same issues.
Click to expand...

To confirm the -5 volts requirement, look at pins 5 and E on the jamma edge connect
http://www.hardmvs.com/manuals/Jamma2NeoGeo4SlotPinout.pdf

If they do not connect to anything on the board then obviously they are not required. Imho if the board required -5 volts (which I do not think it does) you would get no sound at all rather than low sound.

Also check the 12 volts to the board, if low this will cause low sound.
I forgot it was a supergun - maybe it does not use 12 volts ???
 
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mainman

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Modern konami boards if not all of that era do not use -5 volt. I had a martial champion with the same problem which in my case was cold soldering. Konami boards are a bitch to fix despite the fact they are the only arcade boards to ship with a schematic.
 
ttooddddyy

ttooddddyy

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Raizen1984 said:
I don't know what a resistor array is.
Click to expand...

They look like this, you will see several of them near the edge connect, inspect for any cracks. It is an array of resistors (of 8 in this case) in one device. There are a bunch of them lhs of the picture not far from the edge connect.

Array-Resistors.jpg


!BPRp,,!!mk~$(KGrHgoH-DIEjlLlvv6nBJy3RohuGQ~~_1.JPG
 
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