These switches are important, because they not only are associated with
the multiball, but the draw poker feature as well, so I'd like to get
'er up and running. In advance, I appreciate any help or suggestions
that you great bunch of guys can offer.
P.S. - If replying directly to me, please send to althomka AT hotmail
DOT com as I do not check my gmail account regularly. Thank you!
-Al
Marius
www.pinball.ro
--
Fred
TX
CARGPB#8
******************
"-Al" <alth...@gmail.com> wrote in message news:1133390336.7...@g47g2000cwa.googlegroups.com...
One common cause of opto (12v) problems in Sys 11 games is cracked solder
joints on the back of the connector pins on the power supply- from old
age/vibration over the years. Ground can become intermittent as a result of
this, so pull power supply and reflow solder to repair any/all cracks- very
common problem, especially as these games get older and older.
"Errors" that these games report are basically indications that the
switch(es) in question haven't been activated (hit, closed, etc) in so many
games, and giving you a "heads up" to check them for problems. May be
related to optos, or a failed LM339 opto comparator IC on the drop target
opto board- both are common problems/causes in these games.
As far as checking operation of column 6, the easiest/quickest thing to do
is run game in switch test and see if the other switches on that column
work. If so, then no transistor replacement (or other MPU board work)
should be needed.
You may want to check the column wire (green) connection at each switch on
that column, as all switches on one column are daisy-chained from one to the
next, so if a wire breaks at one switch, the remaining switches "downstream"
will not work. Could be a broken wire.
Side A/C is solenoid test- there is a relay that switches power between two
different banks of coils (often at 2 different voltages) and the failed side
could be the side that has the drop target bank reset coil on it- perhaps
the coil isn't resetting the targets so the optos can work? I'm not sure if
your reset coil is working or not.
Ray J.
--
Action Pinball & Amusement, LLC
Salt Lake City, Utah USA
Web: www.actionpinball.com
We're serious about pinball. Anything else is just for fun!