Build Your Own Arcade Controls Forum

Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: Hawk Daddy on September 03, 2007, 10:08:47 pm

Title: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 03, 2007, 10:08:47 pm
Ok so the volume on this is really low, I've been all threw the test menus and cannot find anything that will allow me to turn it up.  Where should I be looking, is there something on the board that I need to turn up?

Hawk
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: BobA on September 03, 2007, 11:15:47 pm
I have the earlier Y version with the audio board.   If my memory is intact I think the original board had a POT for volume control.   Don't know if that is true with the T unit tho.

Edit:   Just checked a T unit manual.  The volume control is connected to the sound board same as the Y version.





Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 03, 2007, 11:36:41 pm
so there is a pot on there for me to adjust then?  And is that manual online or do you just have one.

Hawk
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: BobA on September 03, 2007, 11:44:52 pm
There should be one in the cab connected to the sound board.   

I got the T version manual under PDF manuals and schematics at   http://arcarc.xmission.com/

Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 04, 2007, 12:09:38 am
It's not a deadicated cab, I just bought the board, and didn't know I needed a sound cable.

Hawk
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 04, 2007, 12:29:15 am
Um can you possibly give me a pintout. cause I have no idea how to read that manual.  I have a pic of the board

(http://img233.imageshack.us/img233/6523/sounduf9.gif)

This would really help me out.

Hawk
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: BobA on September 04, 2007, 09:48:45 am
The pot is connected to pins  2 and 4 of connector P5 on the sound board.    The center lug of the pot is connected to pin 2 and one end lug is connected to pin 4.   I do not have a pot value as it was not in the docs but I would  guess at about 10 Kohms.
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 09, 2007, 02:57:08 pm
So would this one work

http://www.radioshack.com/product/index.jsp?productId=2062301&cp=2032058.2032230.2032275&parentPage=family

?

Hawk
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Kevin Mullins on September 09, 2007, 03:31:35 pm
You would something more like one of these -
http://www.radioshack.com/search/index.jsp?kwCatId=&kw=potentiometer&origkw=potentiometer&sr=1 (http://www.radioshack.com/search/index.jsp?kwCatId=&kw=potentiometer&origkw=potentiometer&sr=1)
Especially if you want to mount it somewhere else later on.

Either the 5K or 10K should do it.

I know you mentioned your cabinet wasn't dedicated..... but does it have a volume pot wired in on the jamma harness at all?
I ask because my NBA Jam uses a similar setup and since the volume control was already wired into the jamma harness for the speakers all I had to do was make a jumper to go between pins 2 and 4.
Title: Re: Mortal Kombat T-unit ver 4.0 Volume really low.
Post by: Hawk Daddy on September 09, 2007, 04:03:26 pm
Nope it's going in that dynamo street fighter cab that I got yesterday, and I believe that I'm going to have to wire the entire thing up all over again, because it doesn't have alot of stuff, like test and service switches.

Hawk