New Life Games LLC
**Reel Slots** Gaming Machines => IGT S2000 and Vision Games => Topic started by: Nepa Coin Op on November 06, 2019, 05:53:23 PM
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Swapped amps backplane pcb ect still only has sound from 1 speaker ...... is there a setting in the key chip for mono/stereo speakers ?
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It's the harness. Stereo harness without enhanced sound will do that.
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What do I need to do add an mml board to the mpu ?? Harness and all that in here is original to the game
When I got it it had no board so I don’t know if it orig had an mml or not .... I have an mm board here with a 42 card would that work ?
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You can or change the harness? Whatever works best for you.
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Can I tie the tip 2 speakers together without overloading the amp ? What’s the diff between the 2 harnesses can I make this one work ?
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Look at the 8 pin connector. Stereo has 6 wires into 6 pins. Mono has 6 wires into 4 pins. I don't recommend rigging it but some people do. Just put the correct harness in it if you don't want to use a MML & SIMM. You can probably find one in another machine.
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Can I tie the tip 2 speakers together without overloading the amp ? What’s the diff between the 2 harnesses can I make this one work ?
I have tied the two speaker wires together.. Never had a problem.. You could try you MMII Board with you 0042 simm. That high allow you to run you machine in stereo..
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Thanks guys I appreciate the info!!
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I just ran into this issue with a cabinet I'm fixing for a friend. Turned out to be the MML board, it only outputs sound out of the right speaker. Changing the MML board fixed the issue. Anybody got an easy fix for an MML board that is only outputting one channel? Or should I just junk it.
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I just ran into this issue with a cabinet I'm fixing for a friend. Turned out to be the MML board, it only outputs sound out of the right speaker. Changing the MML board fixed the issue. Anybody got an easy fix for an MML board that is only outputting one channel? Or should I just junk it.
There’s always the frowned upon hack of tying both speakers together, others have done it and so have I with no issues. Depends on how much of a pinch you’re in to get it done and if you wanna spend $ on parts or not
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He wants the machine operating 100%, if you tie the speakers together you are not getting "stereo" sound and he wants it that way. I was originally going to tie the two together, but he says he wants it "mint"
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I just ran into this issue with a cabinet I'm fixing for a friend. Turned out to be the MML board, it only outputs sound out of the right speaker. Changing the MML board fixed the issue. Anybody got an easy fix for an MML board that is only outputting one channel? Or should I just junk it.
Try removing C57 and C59. They're 1uf caps used for the aux audio input. When they fail they'll cause fading, scratchy sounds, loud pops etc. The aux audio input isn't used, so removing them won't cause any problems and may fix the no sound out of one channel problem. If that doesn't fix it try replacing C33 and C34 with the caps you removed from C57 and C59. I've found C57 or C59 is the usual culprit though.
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Thanks, I'll give it a go!
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I just ran into this issue with a cabinet I'm fixing for a friend. Turned out to be the MML board, it only outputs sound out of the right speaker. Changing the MML board fixed the issue. Anybody got an easy fix for an MML board that is only outputting one channel? Or should I just junk it.
Try removing C57 and C59. They're 1uf caps used for the aux audio input. When they fail they'll cause fading, scratchy sounds, loud pops etc. The aux audio input isn't used, so removing them won't cause any problems and may fix the no sound out of one channel problem. If that doesn't fix it try replacing C33 and C34 with the caps you removed from C57 and C59. I've found C57 or C59 is the usual culprit though.
Great information Cliff👍
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Thank you Cliff!!!! Removing the two caps fixed the issue, saved a MMLite board from the dumpster!!! :applause: :applause: :applause:
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You're welcome Rick. Glad it helped! :applause:
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Hey all, have a similar problem. I've got whining + game audio from the left channel and not much audio in the right. Plus, isn't the coin tray speaker supposed to add some bass? If so, I get no audio from that as well. i removed the caps at 57 and 59 but that didn't help. I tried to swap the others from 33 and 34 and not much change. They did test at 1ohm each. Any help is appreciated.
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I would look at your amp board inside the top box where the speakers connect if you have already done cap fix. Also the molex connector that connects the sub to the wiring tends to break, so look at the molex connect on the speaker side and the cabinet side to make sure they are not damaged.
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Thanks Rick...I'll have to look into that and report back. I didn't know about the top box amp. I thought it was only in the MMLite board. I'm new to this so thanks for the insights.
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Rick, so there is an amp in the top box. See pic. Which caps should i test? I'm assuming that you just need to carefully unsolder the edges to get them off? And, what's the value of them?
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You should just pump in some sound into it to test to see if the amp is working. The sound input is the flat black molex connector. The green and white wires are the sound source.
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Ok will do and report back. Thanks.
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Rick can you verify that I should use the A input to op amp inverting input or non- inverting OR channel A attenuation input for 19:1 OR A attenuation input for 4:1? How do you recommend me getting audio to that point? I don't have those types of plugs.
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I made a harness that had a minijack plug on one end (to plug in an ipod) and then the molex plug on the other end to test these amps back in the day. I don't know if I still have it though. If you are are not handy with wiring, your best bet would be to just buy an amp from a person who can test them before he sends them to you, that way you know for sure your amp is working.
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I am handy with wiring I just don't have these type of parts laying around as I'm just a private owner so I'm a novice at troubleshooting some of this stuff.
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Time to head on on over to mouser.com and buy all sizes and pins of the molex connectors then. Most modern slot machines from IGT, Bally, WMS, etc use these molex plugs. And while you are at it, buy a pin extractor also. Well worth it if you are going to dive into this hobby.
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Rick...so I did some additional troubleshooting and found some things.
1. I was able to hook up alternate speakers and I get the same whining from the left channel. I've been told that it is possible to put a 10ohm or 47ohm resistor in line on the white wire which I'm assuming is the positive side and should resolve the whining. I'm not sure but it's a cheap fix if its true. Also if I hook up the right output to the left side and left side to the right channel, the whining is now on the right. I've also been told that this whining is/was common in these s2000 machines due to poor mpu designs. I only get the whining when the reels spin.
2. When putting the machine in stereo, I don't get a couple of game noises. This could be part of the same issue. I've attached the photo of the input connector and it look as a couple of them are bridged?
3. [size=78%]I was able to get the sub working. Bad Molex connection.[/size]
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Does any of this make sense to you and if so, what do you recommend? I don't have any spare parts at the moment so I'd have to order Molex and resistors if that's what it takes.
Thanks again for the help.
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I don't know what you call "whinning," but if you have a 500 series MPU, there's a static type noise that is ever present. I thought you weren't getting any sound at all out of one of the speakers, if you are just getting static, this is normal for 500 series board (if you have a 504B the static noise is a lot less than the others, but it is still there). You have to get an enhanced mpu in order to get rid of the static noise.
To answer the other question, yes, there are two bridges on the input side of the amp.
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Rich...so after doing more troubleshooting I can say that the inline amp is not the problem. It appears that the input is the culprit but I'm looking for the wiring diagram so I can hunt it down. Also, the cheap fix for the whining or interference is happening only when the reels are spinning is to use 10k pots inline and turn the game volume up to about 6, then use the pots to adjust.
The only thing besides the unequal audio to the amp is that I don't hear some sounds when the machine is in stereo, only mono.
Hope that makes sense.
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During all this, it hasn't occurred to ask you if you know for sure your MM Lite board and Simm are known to be working? Have you tried to run the diagnostic tests where you can listen to all the sounds that are in the simm?
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Yes, when I run through the I/O options, I can hear all the sounds.
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Ok, then I guess you must have a either wiring issue, or your mpu may have issues. Since I have so many spares of everything, I usually start swapping parts until I find the culprit.
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I just had my MPU fixed by a professional slot guy so it should be ok.