Re: cine sound boards

For AA sound, the rev.A or B doesn't matter in terms of sounds produced and
the hookup and control is the same. No, there's no sound rom on the ccpu
board and all sound is generated by hardware on the sound board.

Rip Off having no sounds at all points to:

-open circuit in speaker or wiring to speaker such as molex connectors or
volume pot.
-bad transistor Q6, Q7 in the final output stage (is one of the very hot?)
-bad opamp TL081 at IC14, IC15.
-bad ribbon cable between the ccpu and sound boards.
-missing signal coming from the 74LS259 chip at F2 on the ccpu board.

William Boucher

----- Original Message -----
From: "andre" <livnfree_can@yahoo.com>
To: <vectorlist@vectorlist.org>
Sent: Monday, August 16, 2010 3:30 PM
Subject: VECTOR: cine sound boards

>I got in a Rip-Off pcb a little while back. I put it in my Armor Attack and
>for the first time in almost 30 years played a game. Anyways, the sound is
>not working. I checked the +/- 12v and that works, all diodes and
>transistors test ok. Replaced all elec caps.. still no go.
> Now I have 2 AA boardsets, and the sound boards for those are Rev A, and
> one Rev B... both look different orientation of parts, but similar... the
> Rip Off doesn't seem to be quite the same as either.
> So I am wondering on going about troubleshooting the sound board. There is
> no way I can put in an AA sound board and at least hear something that
> would tell me that the main pcb is communicating with the sound board
> could I? Is there a sound Rom on the main pcb or is everything generated
> on the sound card?
> I don't have a scope to check anything, so wondering if there is much I
> can do with a DMM and logic probe or is shotgunning the only way to go?
>
>
>
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Received on Tue Aug 17 09:10:55 2010