Kickman NO Sound .

The original supply is going to be noisy as well.

Its a piss poor design that Midway didnt care to fix simply because "arcades are loud and no one is going to hear these noises." It also has to do with how the cabinet is wired. The Kick lamps and the +12 that is supplied to the logic board come from the same source. In one of my earlier posts I said that the Lamps and Audio Amp were on the same +12, that was wrong. (maybe not, see below).

If you powered the kick buttons from the coin door lights supply voltage they would still flash. There is a switched to GND output that comes from the SSIO that illuminates the bulbs when its enabled. Unless of course you mean to simply have the kick buttons lit all the time but thats lame.

Grrr... These schematics are stupid. On the schematics J5 pin 14 goes to "contr lamps." That sounds like CONTROLLED LAMPS to me. That would be those two kick buttons lamps and if that is the case then the Amp and the controlled lamps ARE connected to the same +12 source.

Either way its actually wired the lamps share a +12 supply with the audio and thats why you are hearing the pop/thump. Furthermore, moving them to the coin door supply wont help any because they are also connected to either the logic board or the amps power supply.

Try this for shits and giggles.

With the game on and and coined up pull one of the coin door lamps out and lightly put it back into place (we want to make the bulb flash). Do you hear a pop? I'm guessing you will.

The only advantage the factory supply would have over this switching adapter might be the extra capacitors but I doubt thats a factor here. The AS adapter has the unregulated +12 supply duplicated so I'm guessing thats not an issue.

Last thing, try LEDs in those two kick buttons. Or you could move the KICK buttons to +5 (or -5) and change the bulbs to 555's. That would isolate the buttons from the audio circuits for sure.

Is the pop/thump the only problem you're having with the sound?
 
The original supply is going to be noisy as well.

Its a piss poor design that Midway didnt care to fix simply because "arcades are loud and no one is going to hear these noises." It also has to do with how the cabinet is wired. The Kick lamps and the +12 that is supplied to the logic board come from the same source. In one of my earlier posts I said that the Lamps and Audio Amp were on the same +12, that was wrong. (maybe not, see below).

If you powered the kick buttons from the coin door lights supply voltage they would still flash. There is a switched to GND output that comes from the SSIO that illuminates the bulbs when its enabled. Unless of course you mean to simply have the kick buttons lit all the time but thats lame.

Grrr... These schematics are stupid. On the schematics J5 pin 14 goes to "contr lamps." That sounds like CONTROLLED LAMPS to me. That would be those two kick buttons lamps and if that is the case then the Amp and the controlled lamps ARE connected to the same +12 source.

Either way its actually wired the lamps share a +12 supply with the audio and thats why you are hearing the pop/thump. Furthermore, moving them to the coin door supply wont help any because they are also connected to either the logic board or the amps power supply.

Try this for shits and giggles.

With the game on and and coined up pull one of the coin door lamps out and lightly put it back into place (we want to make the bulb flash). Do you hear a pop? I'm guessing you will.

The only advantage the factory supply would have over this switching adapter might be the extra capacitors but I doubt thats a factor here. The AS adapter has the unregulated +12 supply duplicated so I'm guessing thats not an issue.

Last thing, try LEDs in those two kick buttons. Or you could move the KICK buttons to +5 (or -5) and change the bulbs to 555's. That would isolate the buttons from the audio circuits for sure.

Is the pop/thump the only problem you're having with the sound?



No the thump/pop is only part of issue.

Maybe I should make another video, but there's us an audible whine noise in back ground the moment you coin up game.

I haven't had a chance to try any of this stuff yet, I was away from home, actually working on somebody else game, which I got going, good old crappy midway fuse blocks! Easy money..

I'll try this week, but I can make a video of this whine sound...
 
So this video will definitely amplify this whine. It sounds like shit! But that's cause the mic is right in speaker grill. It's really not that loud, but I wanted you to have the best example of what I mean..

In the mean time I'm on the hunt for a affordable OEM power supply. But I'm all for coming up with a solution to this issue, because the switcher and adapter is an inexpensive reliable solution. It just had this one draw back..

I need some time to try all of these test, but I still need to take my Christmas tree down to lol

https://youtu.be/yyXSUJtAYlQ
 
that noise is pretty common on MCR games. I wonder if isolating the amp and the logic boards +12 on its own supply would clear that up? Do you have any other MCR games?

Maybe you can do some SSIO swapping and see if one board is worse than the other?
 
I just realized that we hijacked this thread... :)

Anywho. I'm wondering if increasing the size of the input cap on the amp board would help any? Probably wouldnt hurt to replace all the caps on the amp.

The input cap is currently 220mf. Maybe a 1000 or 2200 might help? Not sure.

Theres probably a kick/kickman here at the place I'm currently working. I'll dig it out and see if I can duplicate this issue.
 
I have not capped my amp.. maybe I should do this... just to be sure it's not that.
 
So this video will definitely amplify this whine. It sounds like shit! But that's cause the mic is right in speaker grill. It's really not that loud, but I wanted you to have the best example of what I mean..https://youtu.be/yyXSUJtAYlQ
Mine does that exact same thing. It's almost certainly caused by the PCB, not the amp... since the amp is always running. When you coin up, it enables the audio circuits on the board.

Mine is also running from a switcher... unfortunately, the person who did the conversion hacked up the harness, so it's not very easy to go back to stock linear supply.

DogP
 
I wonder what is it on the MCR SSIO's thats so noisy? I know its not coming from the 8910's as I've listened to them with an amplifier probe deal I made and they sound fine.

I wonder if changing the 1mf caps on that board would help any? Seems to me that when those caps fail you lose sound not pick up more noise.
 
Man my ball hair just got a perm from touching the frame of the monitor while unlatching the control panel threw the coin door.

I unplugged the lamps and no change what so ever. I'm going to recap the audio board and report back on this..

So edit on this report back, no change on the coin up sound, but after unplugging the lamps, no more thump sound on the attract mode
 
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Ps I've been having some health related shit, and other life issues so I'm slow tackling this issue but the attract mode thump I'm pretty sure is no longer an issue with lamps unplugged and circuit is open. I will try and find LEDs in my stash that will fit these if I can
 
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