CPSII A-Board Sound problem

Gentle Ben

Gentle Ben

NAM-75 Vet
Joined
Nov 30, 2009
Posts
1,022
Wondering if anyone might know a reason why one of my A-boards doesn't output audio thru the JAMMA connector, and only one channel thru the RCA connectors.
Have tried multiple B-Boards, same results. Would be OK if I had a Q-Sound cab or otherwise RCA style speakers.
But both my Big blue cabs have JAMMA sound.
:(
I hate pulling the B boards off and exchanging them whenever I want to swap games. One of these days gonna bend some pins....
 
Xian Xi

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,762
If you don't have a Q-sound Amp then you can't use it in a cab since it's not amplified. The q-sounds pulls from the RCA jacks on the A board. The on board amp only works in mono.

Also don't forget to check you +12v level in case it dropped.
 
Gentle Ben

Gentle Ben

NAM-75 Vet
Joined
Nov 30, 2009
Posts
1,022
Eh, I'ma probably have to write off that A board. It doesn't put out sound thru JAMMA connector in any of my cabs. ALL my other ones do.
It's probably just a bad connection somewhere on the board.
Thanks for your help!
 
Xian Xi

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,762
I've had 2 A boards that did the same, 1 was corroded at the mono pin and the other was a bad cap.
 
R

R3LL1K

n00b
Joined
Feb 18, 2009
Posts
46
This might be a stupid question but did you try raising the volume with the pushbutton on the side of the board?
 
Gentle Ben

Gentle Ben

NAM-75 Vet
Joined
Nov 30, 2009
Posts
1,022
R3LL1K said:
This might be a stupid question but did you try raising the volume with the pushbutton on the side of the board?
Click to expand...

Not a stupid question. Would have to be a stupid person to miss that, though. :)
No, the volume was at full blast, and nothing.
 
Artemio

Artemio

NEST Puppet
Joined
Feb 27, 2009
Posts
167
A couple of CPS-2 manuals state that if there is no sound you should keep either of the volume up or down buttons on the board pressed fro 5 seconds after boot.

I once had this problem, and I fixed it by replacing a couple of bad capacitors.
 
Gentle Ben

Gentle Ben

NAM-75 Vet
Joined
Nov 30, 2009
Posts
1,022
Artemio said:
A couple of CPS-2 manuals state that if there is no sound you should keep either of the volume up or down buttons on the board pressed fro 5 seconds after boot.

I once had this problem, and I fixed it by replacing a couple of bad capacitors.
Click to expand...

Well dang, that's good info. Too bad JazzyNYC traded me "A" boards. He has two cabs that have Q-Sound, using the RCA connectors, so he doesn't really need to get sound thru the JAMMA edge connector.
SO maybe I'll tell HIM to try that....
 
You must log in or register to reply here.
Top