Re: What would you do next?

Wow again, I didn't realize this was the same guy.

DUDE! SERIOUSLY, put down the dikes and step away from the machine!!! STEP
AWAY from the MACHINE!!

Why not follow the advice here that you keep asking for and definitively
rule out or confirm the CPU as the problem. Once you confirm it's the CPU
or not, if it is, send it out to be repaired. You can send it to me, John,
Clive or any number of great guys on the group, but for goodness sake DO THE
TEST to determine the state of the CPU FIRST!!

And to follow up on my above post, when I reference pin 3, that should have
been pin 6, please change anything where I mention pin 3 to pin 6 in any
testing you do. If you test all pins of the CPU switch matrix you obviously
don't need to worry about this since you'll be testing them all. But, if
you're only testing the suspected problem row, then pin 6 is what you need
to test, not pin 3.





"John Wart, jr" <johnwartjr@xxxxxxxxxxxxxx> wrote in message
news:aKSdnXNzKtt3o23bnZ2dnUVZ_hKdnZ2d@xxxxxxxxxxxxxx
I agree. I think we've discussed this with the OP at least 2 other times.
Try the test, and make sure the problem you're seeing is on the CPU.

If it is, start by replacing U20 :) But do the tests first!

--
--john

CARGPB34
http://www.myhomegameroom.com


"Borygard" <borygard@xxxxxxxxxxxxxxxx> wrote in message
news:dPednehEJPnGsG3b4p2dnAA@xxxxxxxxxxx
Wow, talk about shotgunning it.

You really need to perform the switch matrix test on CPU as stated on
Clay's site to either confirm or rule out the CPU as the issue...

http://www.pinrepair.com/wpc/index2.htm#switch


If you can't get to the site or figure out the switch matrix test for the
CPU...
-Power game off

-Remove connectors J206/J207 and J208/209 from the bottom of the CPU

-Clip one lead of a test jumper to pin 3 of J207 making sure you don't
touch
any of the nearby pins on J207

-Clip the other lead to the banded end of a 1N4004 diode (a 1N4001 or
similar diode will work as well).
If you don't have a diode you can just use the jumper wire without a
diode with
the switch matrix connectors removed from the CPU, but I like to get into
the habit of using the diode.


-Turn game on, and go into switch edges test mode (you've left J205 on
the CPU so the diagnostics switches will work)

-Touch the non-banded end of the diode to pin one on J209, then pin 2 and
so
on, you should see the switch matrix indicate that switches #31, #32,
#33,
etc. are being made as you touch the pins on J209. If that happens, then
you've ruled out the CPU as the problem and you've got a shorted wire or
bad/broken diode on the playfield somewhere and you'll need to find it.

If the switches show multiple closures when you touch one pin of the
connector or the display shows a row or column short then your issue is
with the CPU. Post what pins are showing multiple switch closures or the
error message and we can point you to the chip(s) to replace on the CPU
if you're capable.





<kendallvanpool@xxxxxxxxx> wrote in message
news:1190141639.019642.273850@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
So here is a description of what I have done. Maybe clipping the
wires was stupid, but it was my next best guess on problem solving. I
knew it was drastic when I did it. This is on a WH20:

Here are the steps I've taken.


The original error is "Ground Short Row 6 Blue White" with a couple of
the solenoid poppers popping (the upper trough outhole and the lower
under board outhole)
1. Disconnected all of the switches from the board, leads to a "check
fuse" error message
2. Heavily inspected the whole blue white switch daisy chain to no
avail.
3. Replaced the rom to no success
4. Replaced the Bigfoot optos to no success
5 . replaced the opto board to no success
6. replaced the U19 and U18 chips to no success
7. back tracked the daisy chain again to no success
8. proceeded to eliminate each switch in the daisy chain by clipping
wire the chain above each switch.
9. Got all the way back to the Bigfoot opto board doing this process
(that is the first switch on the chain)
10. Throughout this process I continued to get the "ground short row
6" error
cut the wire leading to the whole blue white switch daisy chain and
then received the "check fuse" error message.


I thought by going through the switches I would eventually get above
stream on the ground and could go from there. So I'm worried I have a
board problem, but I have no means of testing it. And I've replaced
the U19 and U18 chips so I'm totally lost and out of ideas.






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