Re: Locked on pops on Firepower

On Jun 30, 3:43 pm, deafdumb&blindboy <ilduc...@xxxxxxxxxxxxx> wrote:
On Jun 30, 1:15 pm, c...@xxxxxxxxxxx wrote:





On Jun 30, 2:51 pm, deafdumb&blindboy <ilduc...@xxxxxxxxxxxxx> wrote:

I'm having an issue which I can't fix on my Firepower, the two right
popbumpers are locking on when the game is turned on and nothing will
stop it. I have replaced the 6821 at IC5, the 7408's at IC 6 & 7, the
7402's at IC 8 & 9, the 2N4401's, the TIP102's, (Q5,6,7,8) checked all
the traces and pinned them out, then at the pop itself I have replaced
the diodes on the switch and coil, pulled the resistor and capacitor
off at one side to see if they were shorted closed and they weren't,
carefully adjusted the leaf switches, checked all the wiring for
possible insulation breaks where it could be shorting, checked to see
that they were wired correctly, pretty much done every possible thing
that could be wrong and nothing will keep them from locking on at
startup. It is only the right two, the others are fine. But since
special solenoids on the game are only CPU controlled in diagnostics,
it seems to me the problem would have to be at the switch itself but
I've double and triple checked them, and they are no different from
the ones that are fine. In switch diagnostics, since the fuse F2 is
pulled, none of the slings or pops register. I guess if I want them to
register their switch numbers I would have to manually pull the ring
and rod ass'y down to register it but I don't think that has anything
to do with the problem. But I'm curious, when the switch diagnostics
scroll through a list of switch numbers, are those switches just the
last ones triggered or is it trying to tell me that those switches are
locked on, because none of them are, and it lists 5 switches. Not that
that is part of the problem with the locked on pops though, that is
the thing that is the biggest issue here, just thought there was a
possibility there might be a link there.
J.

DD&BB,
Have you replaced both sides of the infamous 40-pin connector. If not,
I'd advise it. You need to rule that connector out. All kinds of odd
things can happen if that connector is intermittent.
--
Chris Hibler - CARGPB #31www.Team-EM.com

Yes- 40 pin was replaced, both sides, about a month ago, first thing I
did when I got the machine. I've also sucked out all the old solder
and reflowed all the header pins, and replaced 2 of them that were
suspect, and also had replaced the connector for the special solenoids
because it was questionable. So I'm fairly certain there aren't issues
with connectors. Although by the time I get this figured out I will
likely have used up all 25 cycles of the 40 pins usable life.
Actually, I think the newer connectors probably last longe than the
old ones so I'm not going to worry about it yet.
J.- Hide quoted text -

- Show quoted text -

I forgot to ask...the pops lock on at game start (i.e. when you push
the credit switch), not a POWER UP (i.e. when you flip the power
toggle switch.
--
Chris

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