RE: Re[2]: Re[2]: Re: Battlezone - no vectors ingame

Hi all,

Just to say thanks everyone for your suggestions, I did actually get
the board working in the end.

As time was running out, I had to use drastic measures. I desoldered a
handful of logic in the lower end of rows 3,4 and 5 and tested them in
an IC tester. All tested as good, however when I replaced with new,
the problem wen't away, so I assume some strange timing problem (even
though NAMCO have never been near a battlezone boardset as far as I am
aware lol)

I didn't have the time or the inclination to swap the old chips back
in to narrow down the exact fault, so that will remain a mystery. It's
working so I am not going to intentionally break it again :)

Thanks again

Luke

> Luke,
>
> I don't know what a BZ pcb looks like, but if its anything like
> Asteroids, they lift tracks like a pig if your not careful when
> replacing chips or sockets, are you sure there are no breaks in the
> tracks underneath the sockets ?
>
> Pinx
>
>
>
> -----Original Message-----
> From: owner-vectorlist@vectorlist.org
> [mailto:owner-vectorlist@vectorlist.org] On Behalf Of
> lists@arcadeuk.com
> Sent: 22 August 2007 10:41
> To: vectorlist@vectorlist.org
> Subject: Re: VECTOR: Re[2]: VECTOR: Re[2]: VECTOR: Re: VECTOR:
> Battlezone - no vectors ingame
>
> Yes I have both. I have checked for logic activity on the a/d of the
> prom and can't see anything wrong.
>
> I have a known good board to compare with now and I have swapped all
> the proms and bitslices over and can confirm that all the socketed
> chips work (including prom J1)
>
> I have checked most of the chips in the mathbox circuit (there are a
> couple I dont have any known good samples for the comparitor) with a
> HP comparitor.
>
> Still the same problem persists, I have to either cut pin 7 of the aux
> harness or pull prom J1 to get the game to boot up.
>
> To confirm again, I have replaced all sockets with new turned pin (I
> like these as you can actually see that the solder has flowed thru the
> hole to the topside as they are slightly raised off the board. Also I
> buzzed out the J1 socket with a continuity checker to make sure it was
> right, also checked for shorts on adjacent tracks etc, but no,
> couldn't find anything wrong.
>
> Thanks
>
> Luke
>
>> well suspect the signal driving the prom, or something connected to
>> it's output.
>> (or the sockets)
>>
>> got a scope or logic-probe?
>>
>
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>
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Received on Wed Aug 29 20:19:48 2007