Be sure you wired it right. Look at other switches. On the micro mini switches you have the white wire ( and what ever stripe ) and the black end of the diode, then the green wire ( and what ever color stripe ) and then far away on the other end all by itself the silver banded end of the diode.

Or remove the wires from the switch, if errors go away, then see if the switch is shorted or anything else wrong.

LTG

Lloyd (and others). This first came up in this thread http://pinside.com/pinball/forum/topic/is-the-shadow-magnet-supposed-to-be-adjustable

I had suggested to the op checking the switches to the Battlefield Drop Target and Wall Drop Target (and provided photos of my game's wiring).

Somehow this led to multiple switches now being shorted closed. I suspect high voltage was somehow shorted to the switch matrix, but that is only a guess. I had recommended unplugging the switches in the switch matrix to isolate the problem to either the playfield or the CPU.

Thanks,

Tom

did reversing the wires back clear up your problem?

Every single switch in your whole switch matrix in say switch edge test shows a solid square dot (closed)? And by "unplug from the board" you removed which connector on which board? And exactly what happens then?

Just following up on your posts to see if you resolved your issues.

Trying to keep up to speed, so far I understand:

You worked on switch #51 (Brick Wall Target) and reversed wiring & diode thinking the wiring was backwards
This resulted in every switch showing closed in the switch matrix except the right column & bottom row.
You reversed the wires to there original position, and there was no change.
When you unplug the playfield switches from the CPU, all switches show open
If you unplug switch number 51, then there is no change, all switches still show closed.

Is this correct? If so, could you please take a picture of switch 51 and post it.

Thanks,

Tom

As you can see, the last two of us trying to help you have been trying to clarify the symptoms, that are not clear. A response of "yes same problem no change" did not answer our questions or clear anything up. I guess you're not looking for help?

I would like to see a picture of the switch matrix (as it is showing the short) and the only other thing that I can think of is that sometimes when components are heated they can fail. So, if you had reversed the diode (twice) then the heat from the soldering iron might have "cooked" the diode causing it to fail. But 1 bad diode should not short the whole matrix, just 1 row or column. But, if you unplugged the switch, it should have cleared the short. Very confusing. Please post of picture of the switch matrix.

You stated that when you unplugged the switch matrix from the CPU (J207 & J209), all the switches showed open. This (to me) means the short is somewhere on the playfield, and not the CPU.

Thanks,

Tom

I don't know what to make of the switch matrix being in a block like that. I have not seen that before. When the game is telling you ground short Row 1, I would start there. The row 1 wire is the white wire with the brown stripe. Follow it all through the game. It only goes to 8 switches and the back box. Look closely around the mini playfield, as that is also registering an error. I unplugged Switch 51 on my game and all it did was indicate a switch error at Switch 51.

Check the White wire with the brown stripe