UDN7180A failure - how to diagnose which chip?

[Guest]

Archived from groups: rec.games.pinball (More info?)

HI ALL:

My Firepower was recently hit with a surge (I assume) during a rolling
blackout here in Los Angeles. Apparently it took out one of the
UDN7180A's because now the upper-right most bit in all the digits on
Player 1, 2 and credit/ball display are out.

Does anyone know which chip needs replacing?

What is the process in determining the chip that is responsible...

I may have access to a limited number of these chips to replace with
but I need to figure out which one is faulty. Is there a diagnostic
procedure to test 'em?

Thanks in advance for any advice ...

Regards,

Steve

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

I'm pretty sure Clay's site has a procedure for testing UDN7180's with
either a DMM or a logic probe.
That blackout got your displays, huh? Did you have the game on when it
hit? Fortunately I'm far enough out in the boonies where I didn't get
hit by it, but I have a supplier in Van Nuys who was able to use it as
an excuse why he couldn't ship me my stuff that day. (the lazy sod)

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

No, the game was turned off but it was plugged in. I have to assume
that the blackout caused it since it started this right afterwards. I
hadn't checked Clays doc yet but I do have the entire system 7 doc
printed. I'll browse through it tonight...

Thanks!

Steve

 

[Guest]

Archived from groups: rec.games.pinball (More info?)

Hi,

If you do need one, you can find it at www.arcadechips.com

Mark Capps

winslow@earthlink.net wrote:

> No, the game was turned off but it was plugged in. I have to assume
> that the blackout caused it since it started this right afterwards. I
> hadn't checked Clays doc yet but I do have the entire system 7 doc
> printed. I'll browse through it tonight...
>
> Thanks!
>
> Steve
>