I am having a problem with a switch column. Column 6 is not working. This includes the sling shots and the pop bumpers. I have found a loose wire, reconnected it. I have also found a previous “fix” where someone has attached a slingshot wire to the incorrect post on the slingshot. Should I keep looking for loose wires ( I cannot find any) or is it possible that the switch IC has been shorted due to the backwards wires on the slingshot. The diodes are checking out OK (assuming I am testing correctly ).

As always, thanks a bunch!

MK

Thanks! Checking now........

OK....nothing was plugged into J206 (PLED ROWS). It was plugged into J207 ( B.B. COL) there is a plug in J208 (PLED ROWS). Could this be the problem?

Ah, thanks. OK....under switch edge test, with the proper row and column shorted they did show up on test; but the coils fired with the coin door open ( I assume this is another problem associated with the cut off switch). This would lead me to believe I need to re-check the wiring on the playfield.

Would my assumption be correct?

Double checked the wiring, replaced diodes, and still cannot find the problem. Hmmm....what am I missing?

My apologies if I have been unclear. When in test mode, jumping from J206 to J208, the switches test OK (following Robertmees’ advice to eliminate the physical switches by jumping directly). The coils do fire, but I think this is a different problem with the high voltage cut off on the coin door ( will deal with that later).

When in normal test mode, with everything plugged in as it should be, no switch on column 6 registers.

I would assume that this would mean I have a physical problem on this switch column. Checking and re-checking the wiring has not shown an obvious culprit. I have tested the switches, but I have a bad feeling I have not tested them correctly. Is there a sure fire way to test the switches (via DMM) to narrow it down?

Thank you, so very much, for all of your input!

MK

OK, just ran a continuity test. The last switch on the column (Right ramp exit) has none to the connector at the board. I'm going to try to find the break somewhere between.

I have traced the green/blue wire from the backboard to the first connector (left slingshot) and get no continuity. Going to try to determine why.

Thank you my Pinside companions!!! Because of your knowledge I was able to determine a series of events. It turns out there was a wire broken inbetween the backbox and the playfield. One quick solder and all is well!

Thank you, thank you, thank you!

Now, if anyone can direct me to a thread concerning coin door cut off for high voltage

And again, spasiba!

MK