TZ mini Playfield

[gle...@direcway.com]

Hey Guys,

I'm still working on my tz and just today all the flippers
go off when the ball is in the mini Playfield .
Any ideas on how to correct this?

Thanks, JAY

[metallik]

They're supposed to. Only the magnets should work unless you're in
powerball mania multiball. You must have fixed the powerfield entrance
switch while working on the game :)

[Otto]

Might start by going into the test menu and running some diagnostics

Switch edges test--check all the switches but especially around the mini
playfield and the flippers. Remember to make sure the matrix on the display
is showing the correct switches being activated. Look for multiple switches
on the display when only one should show.

Flipper test-check them all in hold and power

Check under the playfield for anything obvious.

Otto

CARGPB11

My web page: http://home.bellsouth.net/p/PWP-Ottoslanding

<gle...@direcway.com> wrote in message
news:1105664806....@c13g2000cwb.googlegroups.com...

[Otto]

Forget what I said.

I was under the impression that he was not actuating the flippers.

Otto

CARGPB11

My web page: http://home.bellsouth.net/p/PWP-Ottoslanding

"metallik" <meta...@fuse.removethis.net> wrote in message
news:8ZEFd.9521$7k5....@fe37.usenetserver.com...

[metallik]

Actually, you may be right.. he could have meant "go off" in that the
flippers activate.. go off.. when the ball is up there. Or they turn
off, like I thought. We'll soon find out :)

[gle...@direcway.com]

When the ball goes into the mini playfield normally just the magnets
are working (unless powerball mania) now magnets and flippers are
working

[gle...@direcway.com]

I' pressing the flippers to work the magnets and thought only magnets
should be working not flippers.

[metallik]

During battle the power, only the magnets should work. During the
multiball, all flippers work. Sounds like the mini playfield entrance
switch is broken, not fixed, although I'd assume the magnets wouldn't
work in that case.

Do what Otto said, first verify all the switches trigger properly when
actuated by a ball. Don't forget those opto switches. See if any are
bad.

[Fred Kemper]

Make sure that they are not disabled in diagnostics/adjustments.

They can be turned off this way. I don't recall the adjustment at
the moment, but it seems it has something to do with "low line
voltage". Certain coils are disabled with this adjustment.

--
Fred
TX
CARGPB#8
******************

<gle...@direcway.com> wrote in message news:1105666294.9...@c13g2000cwb.googlegroups.com...

[Will Irace]

Ack!

I was having the same problem (flippers still active when ball enters
mini playfield). Just started happening a couple of days ago. But now
it's worse than that. In additon to a failed 76 Mini PF Exit opto
(which probably caused the first problem--only fair to leave the
flippers active if we don't know when the ball leaves the mini PF),
every switch in column 4 is causing its whole row to close, and the
game reports "ground short row X". Column 4 switches (and what they do
on my game) are:

Dead end: row 1 ground short
Camera: ditto row 2
Player piano: ditto row 3
Mini PF enter: ditto row 4
Mini PF left: ditto row 5
Mini PF right: ditto row 6
Clock millions: ditto row 7
Lower left 5 mil: ditto row 8

Column 4 is on J206-4 on the CPU board. Unplugged and replugged a
couple times, no change. Any additional advice would be most welcome.
I'll post updates here and at my TZ blog, http://www.irace.net/tz .
Help!

--W

--
Will Irace
http://irace.net/tz

[Will Irace]

[Lloyd Olson]

Find the ground row 1 short and fix it, then fix the cpu and what ever damage
you did to that. LTG :)

"Will Irace" <spb...@gmail.com> wrote in message
news:1107112296.5...@f14g2000cwb.googlegroups.com...

[Will Irace]

My TZ is bleeding out!

It's not just row 1--it's every switch in column 4 that's causing its
whole row to ground closed. Scanning through old messages, I unplugged
the mini playfield and the opto board to see if the remaining switches
in column 4 cause their rows to short, and sure enough they do.

And while I was doing all that, I thought I noticed I was getting a
shock from my TZ. Sure enough, there's 68VDC between the power
ramp/rail and most of the other ground metal on the game (cabinet
ground braid, side rails, exposed ground ribbon wire under the PF).
When I unplug the game the voltage slowly dissipates (unless I put it
on my hand in which case it dissipates faster, ow). I'm trying to
figure out what the power ramp/rail is electrically connected to in
order to see WTF is going on. Any other suggestions!

[putnaja1]

Possible switch short?

"Will Irace" <spb...@gmail.com> wrote in message

news:1107120069.9...@z14g2000cwz.googlegroups.com...

[Kevin Ramsey]

I had the same problem of 68v supplied to everything metal. Nice little
tingle with that. It turned out to be a coil, the ramp ball catch coil on
the ramp to the mini playfield had moved and was causing the coil wires to
short to the coil bracket and from there it was everything metal the ramp
touched. Blew out some optos for me and woke me up when I touched the side
rails and that ramp. Take a look at all of your coils to see if the power
wires are shorting to anything metal.
Had the same row short error and it blew chip U20 & U14 when the coil
shoted to the ramp.
Good luck,
--
Kevin in MD.

"putnaja1" <I_HAT...@screwu.net> wrote in message
news:8WfLd.287$0O4.233@trnddc03...

[Will Irace]

Kevin, you're exactly right. 22 days ago I disassembled the ramp
diverter and installed a magnet to improve its accuracy and
performance. When I checked it after reading your post, I found I had
reinstalled the coil assembly with the wires sort of wrapped around the
coil in a manner which was generally inelegant and specifically too
tight. Now that the ramp diverter coil wires are routed properly, the
short seems to be gone and I'm no longer getting that 68V from the
power ramp to ground. But my ground short errors persist, I assume
because U20 and/or U14 are blown. I've also got a bad pair of optos at
the mini PF exit.

And I now see this same thing happened to MCPKLLR in 2000.
http://groups-beta.google.com/group/rec.games.pinball/browse_frm/thread/19091a1e664b6673

Was that you Kevin? :-)

U20 on my CPU board says "ULN2803A" and a manufacture code (QQUD9309,
9th week in '93). U14 is DM74LS374N, manufacture code P9318SJ. Before
I run off and ask PBR for a couple of sockets and a pair each (for good
measure) of LN2803A and 74LS374N, why am I seeing all this talk of bad
LM339's? Should I be worried about U16 to U19 too? Or U1 to U3 on the
opto board?

Thanks as always,

[Lloyd Olson]

If you have bad optos at the mini playfield exit, be sure you have the
connectors for the mini playfield right, two are identical but have different
wires, if you mix them up you send high power to the wrong things. LTG :)

"Will Irace" <spb...@gmail.com> wrote in message

news:1107144667....@z14g2000cwz.googlegroups.com...

[Will Irace]

Amen to that, Lloyd. I must have checked those powerfield connectors
about 3 times before reconnecting them tonight...I don't think that
problem has ever hit me, but I've read about the pain of those it has.

So I'm about to place my order for U14 and U20 chips. With only one
set of failed optos (lower powerfield exit), should I expect to need to
replace U1, U2 or U3?

Thanks!