Re: RE: Regarding the suggestions you made, with regard to checking the TLO82 OP AMP

----- Original Message -----
From: "Stempak Arcadius-ASTEMPA1" <ASTEMPA1@motorola.com>
To: <vectorlist@synthcom.com>
Cc: "Stempak Arcadius-ASTEMPA1" <ASTEMPA1@motorola.com>
Sent: Thursday, October 03, 2002 8:30 PM
Subject: VECTOR: RE: Regarding the suggestions you made, with regard to
checking the TLO82 OP AMP
> Peter,
> *******
>
>
> I did my best to Scope things out, so to speak, and
> noted that while the TLO 82 OP AMP, is recieving Power
> (12 Volts) O.K. and INPUT 1 / OUPUT 1 appear to be
> working, as far as I can tell, did not dawn on me,
> but should have, that this OP AMP, in this Case, is being
> used as an Inverting AMP. Anyway it appears that INTPUT 2 /
> OUTPUT 2 is not either recieving or outputting anything at all
>
> Anyone have any ideas ???
>
> However and due to the fact that this Board, is not
> easy to get to, I imagine, that I will have to either create
> an Extender Board, or find out some other Creative way to
> get to the Parts on this Board, or ..........

It was suggested that you remove everything from the cage, including the
bus. did you try that?

> Does anyone perhaps have a SEGA G-80 Extender Card for Sale ???

Try Alex Yeckley (http://www.elektronforge.com/). I sold him a bunch of
kits way back when to make these.

> Or for the ultimate Question, (don't all laugh at once) does anyone have
> an ELIMINATOR (MEATBALL) working / spare sound card for Sale ???

I repair / replace all Sega XY boards for $20 a pop (excluding special chip
315-0082; I'm out of these) + shipping expenses.

> Almost forgot to ask, one other thing, when the SOUND BOARD
> EPROM BOARD and CPU BOARD are all in place, and with the X/Y
> Boards (TIMING / CONTROL) Both Removed and after I power up the
> game the HALT LIGHT(RED LED) lights up and stays LIT until I power
> off and Replace the X/Y Board Pair.
>
> Is this a Normal Occurance ???

Yes (as I just found out seconds ago); it appears I was wrong about being
able to remove the XY cards and test sound boards that way. Turns out if
you have the XY control board removed, it will exhibit static and the red
halt light will come on. If the XY timing board is in, though, it will work
ok (I would not recommend having a monitor hooked up at this time, though).

I will update the faq accordingly.

> Reason I ask, is that I would like to only Test the Sound Card with
as
> few Boards as possible (if possible) in this Card Cage ???
>
> Also I know that the Sound Board must be in Slot 1 in the Card Cage,
> but what, if anything, actually happens, if you use another Slot ???

There is no special ordering of the cards; they all plug into a large bus at
the back of the cage. Ordering is not important, and many other types of
raster cards can be plugged into them as well (the modularity of the system
was one of the big selling points).

--
Mark Jenison
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