Re: Black Hole- strange problems.

I'm away from home until tomorrow afternoon, but I'll do my best to
answer some of the suggestions you guys gave and we'll see if there are
any other suggestions or ideas that come of it.
Here we go....

1)What happens when you perform test #18, the switch test?
- I'll let you know as soon as I get home. I can tell you right now
that I remember running that test and seeing a few switches come up. I
believe, but could be wrong, that 14, 15, and maybe 45 were among them.
I think maybe 4 switches showed up. I figured that one or two was
from the balls in the trough. Without the manual (not to mention left
town for a couple days) I couldn't check what other switches were
energized. I'll check for sure tomorrow.

2)Interesting. You are able to boot the game into bookkeeping mode,
but not
into game mode. The integrities of the tilt, slam, and coin mechanism
(I
should have specified "mechanism" earlier, sorry) switches are normal?
Are
there 3 pinballs in the trough? If not, that could be a culprit...
- Well, I only get displays and bookkeeping and game mode if the driver
board is not connected to the CPU. So, I detatched the CPU-->Driver
connector and ran the test. When I do that, everything appears
normal...I can drop in a quarter and it registers a credit...I hit
start and it says ball in play, but obviously the ball is never kicked
into play and no points register enen manually. I'm pretty sure I've
had three balls in that part of the trough, but not positive. I'll
make sure tomorrow.

3)What fuse(s) blow when you plug the old power supply in?
-At least the 10v, 5A fuse in the cabinet. I think it's fuse 2 or 3,
but I don't know for sure. I'm not sure if any others blew because I
haven't had it in for a while. I have plenty of fuses so I can test
that board out again tomorrow too.

4)The energized lower Captive Hole is worrisome. This solenoid, which
I
believe is the "hole kicker" in the schematic, has a "pre-driver"
transistor Q16 on the driver board, which could be bad on your board.
Is
this solenoid one of the ones that needs a pull-up resistor
retrofitted?
-The resistor is already installed and the playfield mounted transistor
tested good. I even pulled it out and put in a new one and got the
same result.



5)First thing to do is fix the 5 volt PS problems. If the CPU
board doesn't get 5 volts (+/-0.2) it won't work properly.
If you're getting 5 volts at the PS, but 4.3 v at the CPU board,
you've got flaky connectors (big suprise!). Check for corrosion,
bad crimps, solder cracks around pins.
-I'm pretty sure it's not connectors since I just redid them all. Also
because the 5v drops to 4.4v with just the CPU attached and then to
4.1v with the driver attached. It's more like my PS just can't handle
the load and it shows as more and more things are pulling.

6) Dave....wow. There's a lot of info there. I'll check those bridges
(rectifiers?) in the lower cabinet, but I just replaced them all. I'll
take everything else you suggested one at a time, and I'll probably
need help along the way.

Thanks for all of the help....I'll try to be more helpful myself
tomorrow when I have the game in front of me and can test some things.
Hopefully, I can eliminate some of these suggestions and get to the
real problem. I appreciate the time you guys are taking to help.

Kevin

.

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