It doesnt even look like this thing was on the original board judging by the way it was soldered..
its right next to the sound pot. here a pics from either side..
any advice?
RAIDEN II AUDIO NOISE
RAIDEN II AUDIO NOISE
Hey guys, just picked up a Raiden II board, and I'm getting a really high pitched ringing when the game is running, the ringing gets louder as the sound pot is adjusted. I checked out the whole board for shitty connections, but I only managed to find one...
It doesnt even look like this thing was on the original board judging by the way it was soldered..
its right next to the sound pot. here a pics from either side..
any advice?
It doesnt even look like this thing was on the original board judging by the way it was soldered..
its right next to the sound pot. here a pics from either side..
any advice?
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Wow, that's weird looking. My board does not have that, just for what it's worth. Can you see what pins it's soldered to? Perhaps the owner attached that to fix some other sound problem and introduced that ringing (I don't know what capacitors do to audio signals, so I may be totally off-base).
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
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brokenhalo
- Posts: 1393
- Joined: Wed Mar 26, 2008 4:11 am
- Location: philly suburbs
Re: RAIDEN II AUDIO NOISE
pretty bizarre to just add a cap like that. personally, i'd remove it just to see what changes.
Re: RAIDEN II AUDIO NOISE
Actually, this just made me go hook up my Raiden II board again. I think I have the exact same problem as you 
When I got my board, it had no pot for the volume, so I used to just play it with no music. Recently someone soldered a pot on for me, and I never got around to try it. So now that I have, I notice that only a small range of pot angles work, and most of them get all crackly. If I get it just right, I can hear the music and effects fine, but there is a loud ringing over it.
I'll have to check some stuff out soon then >_>
When I got my board, it had no pot for the volume, so I used to just play it with no music. Recently someone soldered a pot on for me, and I never got around to try it. So now that I have, I notice that only a small range of pot angles work, and most of them get all crackly. If I get it just right, I can hear the music and effects fine, but there is a loud ringing over it.
I'll have to check some stuff out soon then >_>
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
yeah, I'm going to try that tonight.. I have a fair bit of experience working with loudspeakers so I might just build a crossover network to filter out the high tones if I cant eliminate it all together.brokenhalo wrote:pretty bizarre to just add a cap like that. personally, i'd remove it just to see what changes.
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
so, I removed the capacitor, and the ringing just got louder.
after re-soldering the capacitor, the ringing dimmed down.
the capacitor is currently a 10 microFarad capacitor, would using a cap with a higher capacitance dim the sound more?
after re-soldering the capacitor, the ringing dimmed down.
the capacitor is currently a 10 microFarad capacitor, would using a cap with a higher capacitance dim the sound more?
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Sounds plausible; could you tell me where the legs are soldered? I might end up having to do this myself 
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
soooo, tried a HUGE range of caps and none of them made the noise any quieter. though the presence of a capacitor still makes the noise dimmer than without a cap at all.
I'm gonna build a low pass filter, to pretty much cut out the high treble range of the board.
oh yeah trap, since you asked, the cap was soldered to (COUNTING FROM THE LEFT) pin number 10 AND 11.
I'm gonna build a low pass filter, to pretty much cut out the high treble range of the board.
oh yeah trap, since you asked, the cap was soldered to (COUNTING FROM THE LEFT) pin number 10 AND 11.
GaijinPunch wrote:Ketsui with suction cup.
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channelmaniac
- Posts: 40
- Joined: Tue Apr 27, 2010 5:24 am
Re: RAIDEN II AUDIO NOISE
Recap the audio section for starters...
I see a "tk" cap in there and those are the pesky ones that commonly fail on Neo Geo boards.
I see a "tk" cap in there and those are the pesky ones that commonly fail on Neo Geo boards.
Re: RAIDEN II AUDIO NOISE
LOL tried recapping the audio section, changed a few of the caps and tested it.channelmaniac wrote:Recap the audio section for starters...
I see a "tk" cap in there and those are the pesky ones that commonly fail on Neo Geo boards.
one of my caps exploded!
i replaced it again, and it exploded again!
im definitely doing something very wrong, but i dont know what. I replaced the caps with caps with identical capacitance. although the voltage marking on the ones I used were higher than the original. is that a problem?
its hilarious to see a cap explode
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Normal when fitted the wrong way around.
System11's random blog, with things - and stuff!
http://blog.system11.org
http://blog.system11.org
Re: RAIDEN II AUDIO NOISE
you can now slap me in the face.system11 wrote:Normal when fitted the wrong way around.
I didn't know that there was a "right way around"
WELL NOW I LEARN FROM MY STUPID MISTAKES
for the record, all caps have been replaced, and the whine is still there.
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
hmmmm, still got a couple of questions if anyone can help me out D:
should i change the sound amp? i saw another forum that reccomended that I give that a try.
aaaand, just a more general question: Do the 6 seibu eproms store the sound data? the graphics? I just wanna know what their function is.
let me know if you guys have any idea!
should i change the sound amp? i saw another forum that reccomended that I give that a try.
aaaand, just a more general question: Do the 6 seibu eproms store the sound data? the graphics? I just wanna know what their function is.
let me know if you guys have any idea!
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
So I seem to have made some progress in trying to find a solution to this problem. I was searching the web and I found this on some sketchy-ass website:
Notice that he is referring to pins 10 and 11 that I found that out of place capacitor soldered to, I'm gonna go ahead and cut that pin tomorrow to see if that fixes the problem. I'll let you guys know how it turns out!7/9/03 Repairing a Raiden II PCB
This board was from a friend of mine. It played fine but the sound had a massivly noisy hum/squeal. Kind of like EEEEEEEEEEE! OK I cant type what I heard. Poking around with the scope I found that on pin 10 and 11 (which are tied together) of the hybrid chip (the SIPP package that is potted and has components within) in the sound circuit had a sawtooth wave on it. And it matched the sound I was hearing. I did not have a replacement chip but I found that if I cut pin 10 away from the PCB, the hum was gone and the sound level was OK. So it is sort of repaired for now.
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Any info? I went to play again last night, and the screeching gets pretty annoying 
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
SUCCESS!!!!!!!!!!!!!!!!!!
FUCK YEAHH!!!!!
FUCK YEAHH!!!!!
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Awesome news! Pin 10 is the 10th pin from which side of the PCB?
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
Counting from the left from the side shown in the picture above 
let me know how it turns out!
let me know how it turns out!GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
It works! No more squealing!
However, I'm noticing now that the OKI isn't making any sound effects nor drums. Does yours? I'm not sure if this "fix" caused it, or if my board was already like that (which I can entirely believe >_>).
However, I'm noticing now that the OKI isn't making any sound effects nor drums. Does yours? I'm not sure if this "fix" caused it, or if my board was already like that (which I can entirely believe >_>).
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
The sound effects chip. Responsible for drums and some sound effects.
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
I just looked up a video of Raiden II on youtube, and I noticed the drums.
Turns out my board NEVER had drums, so I didn't notice anything after the fix
Turns out my board NEVER had drums, so I didn't notice anything after the fix
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Haha... maybe the problems are related then. I can't remember if my board had them before I did the fix either...
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
I dont mind that the drums are missing, that squeal was damn annoying
I'm just pissed that this board was sold to me as working..
I'm just pissed that this board was sold to me as working..
GaijinPunch wrote:Ketsui with suction cup.
Re: RAIDEN II AUDIO NOISE
Yeah, same. Sold to me as working, and didn't even have the fucking volume pot! 
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
Sounds like something I had to find a solution to recently on Edward Randy.
That cap someone put on was an attempt to get rid of the sound by using a low pass filter. Pretty crap attempt too as they've used a polarised electrolytic and you really want to be doing it with a very small value unpolarised. Having said that this won't work if the noise is really loud, are you able to youtube it? If either of you can't find someone local and don't particularly value the board feel free to send it to me and I'll replace the OKI chip in the name of science.
That cap someone put on was an attempt to get rid of the sound by using a low pass filter. Pretty crap attempt too as they've used a polarised electrolytic and you really want to be doing it with a very small value unpolarised. Having said that this won't work if the noise is really loud, are you able to youtube it? If either of you can't find someone local and don't particularly value the board feel free to send it to me and I'll replace the OKI chip in the name of science.
System11's random blog, with things - and stuff!
http://blog.system11.org
http://blog.system11.org
Re: RAIDEN II AUDIO NOISE
The noise is definitely fairly loud. It's louder than the game, at least. Unfortunately, I'm not really too willing to part with it; I can deal without the sound effects just fine, for now. Maybe at some point in the future I'll consider it.
@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
Well, the idea was that I'd post it back afterwards 
Send it to Channelmaniac if possible, I think this question is more important than just breaking it and putting up with the fault, seems common.
Send it to Channelmaniac if possible, I think this question is more important than just breaking it and putting up with the fault, seems common.System11's random blog, with things - and stuff!
http://blog.system11.org
http://blog.system11.org
Re: RAIDEN II AUDIO NOISE
I figured, but I have no idea how long you'd end up keeping itsystem11 wrote:Well, the idea was that I'd post it back afterwards
If you have any estimates on how long it'd take, maybe I'd be willing to let it go for a little bit.@trap0xf | daifukkat.su/blog | scores | FIRE LANCER
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
<S.Yagawa> I like the challenge of "doing the impossible" with older hardware, and pushing it as far as it can go.
Re: RAIDEN II AUDIO NOISE
It figures that the Raiden II I bought - which I can't really play due to not having a monitor that'll sync right with it - has perfect audio