Re: Star Wars audio problem constant popping, clicking whatever

I'm really hoping that this will fix these two boards. I've got three more
sets at the shop I used to work at in Cali and will be packing them up next
time I'm out there.

We'll find out tomorrow.

Posted for future Googler's!

Matt

"RocketAero" <rocketaero@xxxxxxxxxxxxx> wrote in message
news:dxmwf.699$Hd4.194@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Thanks Matt. This is good info. I have the same problem with my ESB
> boards ... sounds present with clicking and no speech.
>
> Tony
>
> "Matt Mac Donagh" <gamefixer@xxxxxxxxx> wrote in message
> news:W6CdnY1RAKa8UlzeRVn-jA@xxxxxxxxxxxxxx
>> Did some more digging. Looks like two people have had this problem and
>> fixed it by changing the LS161 in the Speech clock circuit. I will follow
>> up later...
>>
>>
>> "Matt Mac Donagh" <gamefixer@xxxxxxxxx> wrote in message
>> news:qaGdneJqXMrRW1zeRVn-tw@xxxxxxxxxxxxxx
>>> Heres another one I'm bound and determined to fix. I have two Star Wars
>>> audio boards that boot up, make that three pop (or click) sound that SW
>>> makes upon power up and then proceeds to pop twice every second or so.
>>> Looking at the schematics I have been able to determine that the speech
>>> chip (TMS-5220) is being turned off and on through a few transistors
>>> which are driven by PA5 (Pin13 of the 6532 PIA). I have not been able to
>>> determine why the PIA is acting like it is. All socketed IC's are good,
>>> all of my voltages are good and clean. The board will generate game play
>>> audio for a split second from time to time. If I go into the RAM\ROM
>>> test I get 16 good tones indicating that all RAM and ROM check good.
>>> I've also tried this sound board with another working CPU and AVG board,
>>> same results.
>>>
>>> I've run across this very problem 7 or 8 times in the last 5 years. I'm
>>> going to figure this one out and post the fix here. A google search
>>> comes up with others that have had this problem but no definitive fixes.
>>> This cant be all that complicated.
>>>
>>> --
>>> Matt
>>>
>>> M and M Electronics
>>>
>>>
>>
>>
>
>


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