Re: LL PCB repair

Nice! Mouser and Digikey have the 12.096MHz crystal used on these (all?) Atari vector boards (oh, not MH)

-DrG

On Feb 21, 2013, at 5:35 PM, Andre Huijts wrote:

> Would be totally awesome Steve !
>
> Remember this baby has been converted to Asteroids with a bootleg kit BITD so I guess I'll need Asteroids bootleg sigs ;)
>
> However....I just diagnosed my very first fault on an arcade PCB with my Fluke. I'll immediately will admit that I could have found the issue just using my eyes too......
>
> Hooked up my 6800 to 6502 converted pod, powered up UUT. Fluke says UUT power is not OK. I check on the board and indeed it's only about 4,6V
>
> Nice, that works :) Cranked up my test switcher PSU to 5,1V on the board and no more complaints from the Fluke.
>
> So first things first: Bus check. Response => pod timeout Bad UUT clock.....touch the 6 Mhz test point with the Fluke probe and it sticks high. Reset the board and it sticks low and whatever I do it sticks low.
>
> Mmmm so we got a clock problem, let's see where that crystal is.......mmmmm....should be very near that test-point but all I see is........two holes in the board.....the crystal is missing or broke off :P
>
> Guess I'll need to dig one out or order one....gonna be hard to get the exact correct frequency AFAIR.....but OK I feel both happy and a bit stupid for not noticing this right away :)
>
> Cheers, André

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Received on Thu Feb 21 18:37:12 2013