MVS 4 Slot Sound gone!!!!!!!

ArcadeForever · Jul 7, 2005

HI All, I am new to this board. I have an MVS 4 slot and a MVS 2 slot gold edition. the 2 slot works great... by my 4 slots sound is toast, just static from the speakers... anyone have any idea where I can get another sound chip or at least know the pinouts??? Hitachi OC3 HA13001???

thanks Everybody!!!!

ttooddddyy · Jul 7, 2005

welcome to the forum ArcadeForever.

ArcadeForever · Jul 7, 2005

HA13001 Pinout

:multi_co:

Ttooddddyy, THANKS so much for your help!!!! thats great and will help me troubleshoot. if I get desperate I suppose I can take the amp out of my 2 slot... does anyone lnow where I can get a new chip or has an amp chip for sale out of a toasted board??

thanks!

ArcadeForever!!!!

ttooddddyy · Jul 8, 2005

if you get stuck I have some here, just PM. There must be somewhere in your location that sells electronic components that would stock the HA 13001. It astounds me when guys in north america seem to have difficulty sourcing common components like this. I have this stuff in the jungles of PNG (sourced out of Australia)

lill-c · Jul 8, 2005

I got a few a while back from Canada. This is the place.....http://www.protechnique.com/

ArcadeForever · Jul 8, 2005

MVS 4 slot no sound

Thanks for your help everyone!!! I tested the chip and put the inputs on my scope, there appeared to be some kind of AC variable signal coming in and there was 12v at the Vcc point so the chip must be bad...

ttooddddyy · Jul 8, 2005

ArcadeForever said:
Thanks for your help everyone!!! I tested the chip and put the inputs on my scope, there appeared to be some kind of AC variable signal coming in and there was 12v at the Vcc point so the chip must be bad...

Not necessarily, we had a member with problems around the output stage the other day, that turned out to be a faulty electro cap.
http://www.neo-geo.com/forums/showthread.php?t=123291
That was motorboating though.

Plug the headphones in, that signal is taken off before the audio output stage.

You may have a duff op-amp or perhaps a digi processing problem, thats a whole different story.

Is the HA 13001 getting really hot, that may be an indication.

ArcadeForever · Jul 9, 2005

Hmmmmmmmmmmm.... oddly enough.... on the board by the sound output and of course the chip. I have 1/8 jacks, and there are two more of these ports in the front of the the game by the NG card slot.. The 2 on the board seem to be microphone ports as when I plug into them my headphones turn into microphones as all good headphones can do and when I talk into the headphones, the sound comes out my speakers amplified. when I plugged into the jacks in the front of the game by the NG card slot, I get nothing as well, so your theory is definately holding water.....

ArcadeForever · Jul 9, 2005

by "motor-boating" I guess that you mean the putt putt putt putt sound that comes out of my speakers now.... when you said that I was thinking, I can replace all four caps on the output stage. but before I do, do you think that it is possible, and I suppose it is, that at least one cap from each channel could be shot since I have "motorboating" through both speakers ??.... Did the other guy have two speakers??...

ttooddddyy · Jul 9, 2005

"by "motor-boating" I guess that you mean the putt putt putt putt sound that comes out of my speakers" yes

Replace the cap off pin 6. I think its a 22 uF

then bridge the other electros with say a 100 uF untill you identify the culprit
(if you have the caps on hand, might as well do a blanket change)

It will not be either of the decoupling caps that feed the speakers.

edit: be sure to discharge the test cap each time as you move from cap to cap

ArcadeForever · Jul 10, 2005

Toddddyyy, I was just wondeirng a bit back where you said that the headphones are taken before the audio output stage. In other words, the headphones SHOULD be hearing the proper sound if there is something wrong with the output section in that case ??? I am hearing the same nothingness from the headphones though. Would you say that there is something wrong further back in the circuit or are the headphone taken off right there at the edge of the circuit at the input of the amp chip?? .. also, when I jump the caps with the 100uF one, I guess I do that from the solder side eh?? cause I cant seperate the sandwich.????

thanks for all your help...

ttooddddyy · Jul 10, 2005

If it is motor boating, the problem is likely to be around the HA13001, bridge the caps on the solder side or from the top as they are common (as is the mid layer)

ArcadeForever · Jul 10, 2005

yeah its kind of a staticy sound.....

ttooddddyy · Jul 10, 2005

have you done the cap thing

ArcadeForever · Jul 10, 2005

Ill have to wait till tomorrow I only have a 33uF 35V cap not a 22uF 16v one...unless Radio Shack has one ..... Hmmm Ill check... but I dont think that they know what a cap is....lololol

ttooddddyy · Jul 10, 2005

ArcadeForever said:
Ill have to wait till tomorrow I only have a 33uF 35V cap not a 22uF 16v one...unless Radio Shack has one ..... Hmmm Ill check... but I dont think that they know what a cap is....lololol

33 is OK

ArcadeForever · Jul 12, 2005

I replaced the 22uF 16 with the 33uF 35 nothing yet but will jump the rest of the electrolytic caps tomorrow and post back!!!

ArcadeForever · Jul 13, 2005

I tried bridging across some of the caps (at the outputs to the chip) still nothing I suppose replaceing them is in order, can you tell me which ones I should replace??

ttooddddyy · Jul 14, 2005

between pins 7 & 8 and 11 & 12, they are 100 uF, feedback circuit. But bridging whould have cleared the fault, assuming there is not a short.

It is still motorboating ? bop-bop-bop-bop-bop

ArcadeForever · Jul 14, 2005

well its not quite like that.... nothing steady at all... more like you can hear the amp working and the RFI from the monitor and pcb leaking into it.. in essence nothing at all...

Im tempted to start taking sound parts off of the working 2 slot I have and put it on the 4 slot till I get it working....

dogtoy · Jul 14, 2005

Have you tried the headphone connector? It is not a normal headphone jack like on 2-slot machines. Yes, I know there are some jacks that look like they are for headphones (no idea what those are actually for, i've never gotten mine to do anything). There is a 4 pin connector near the memory card connectors. This is for the MV-IC board which adds memory card and regular headphone jack capabilities to the 4 slot, MV-1, and 6 slot.

The headphone connector pinout is (+), (-), (-), (+) not sure which is right and left. Same size connector as floppy drive power cable, cd-rom audio cable, pc speaker cable (not same pinout, just same size connector).

Maybe this will help narrow down the problem.

cheers,
-DT

ArcadeForever · Jul 16, 2005

I tried plugging headphones into the headphone jack in the front of the game where the card slots are first and I get the same nothingness. The 2 headphone type jacks on the 4 slot MB on the left hand side of the board, after plugging a set of headphones into them are actually sound inputs!! if you try plugging headphones in to them and blow into the headphone ear pieces (as they work on the same principal) you can hear yourself through the speakers on top... DJ NEO!!! my cabinet uses the 4 pin connector to go to the speakers which is of course producing no sound..

I think that is what you asked....

Wayne

ttooddddyy · Jul 16, 2005

Please put me straight here, we have gone from the motoboating to nothingness ?

Im getting confused

ArcadeForever · Jul 16, 2005

Im sorry for the confusion Toddyyyyy it wasnt what I thought it was, like I said in the previous post

"well its not quite like that.... nothing steady at all... more like you can hear the amp working and the RFI from the monitor and pcb leaking into it.. in essence nothing at all.."

the only sound coming from the speakers is amplified nothingness and amplified line/RFI noise. The amp definately works cause you can hear it.... if you plug a mic/speaker into one of the ports on the left hand side your voice will be amplified and sent through the speaker...

I hope that clears it up a bit, again my apologies for misleading you guys/girls

WAyne

Id call you and let you listen to it if you thought it would help... :help:

ArcadeForever · Jul 16, 2005

another scenerio would be like if you have a guitar amp with no source plugged into it. you have the empty amp sound.....bzzzzzzzzzzzzzzzzzzzzzzzzzzz.... hahahaha :glee:

MVS 4 Slot Sound gone!!!!!!!

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