So been working on a hot shot. All is good except that the 1, 2, 3, 4, 5 drops do not register and the center targets below pop bumpers do not register when lit - register fine when not lit.
I am an EM novice so any help greatly appreciated.
Do the 6 and 7 targets work? If so, you may have a break in either the green or green-black wires that connect all of the drop target switches together.
/Mark
Quoted from StratDoc:center targets below pop bumpers do not register when lit - register fine when not lit.
Check these switches.
Capture (resized).PNGBroken wire it is on the drop targets 
For the center targets, where are the switch connections loacted. The or-green and sl-gr come off the lamp, and connect where? I don't really understand the EM schematics - I have the originals for the game. SS schematics much easier to read.
Thanks,
Quoted from StratDoc:For the center targets, where are the switch connections loacted.
Can you elaborate? I don't understand the question.
Quoted from StratDoc:The or-green and sl-gr come off the lamp, and connect where?
In @currieddog's schematic above, the orange-green wire from the left target light socket goes to a normally open switch on the AX (or Target Special) relay. On the other side of that switch a maroon-white (maroon wire with white tracer) wire goes to one of the outer leaves on a Make/Break switch on the A (or Alternating) relay.
The slate-green wire from the right target light socket goes to another normally open switch on the AX relay. On the other side of that switch a maroon+white (maroon and white in equal proportions) wire goes to the other outer leaf on the same Make/Break switch on the A relay.
I am not sure what I am looking at on the AX relays and the A relay. If I manually manipulate it I can make one of the lights come on but when I touch the target nothing registers, but occassionally the knocker seems to fire.
Quoted from StratDoc:I am not sure what I am looking at on the AX relays and the A relay.
For the contacts to be clean and making solid contact.
Just because the contacts touch does not ensure solid contact. Read more: http://www.pinrepair.com/em/index2.htm#clean
For a switch to work 3 things are necessary:
1) When open, there should be a small space between the contact points (duh)
2) When closing, the long blade's contact point should push the short blade's contact point enough to move the short blade
3) The contact points should be clean, which they usually will be if #2 is happening
Quoted from HowardR:For a switch to work 3 things are necessary:
1) When open, there should be a small space between the contact points (duh)
2) When closing, the long blade's contact point should push the short blade's contact point enough to move the short blade
3) The contact points should be clean, which they usually will be if #2 is happening
I probably wasn't clear in my previous post. I understand the operation of how switches work. What is switch the sequence activation for the two stationary targets so I can hopefully trace down the problem switch(es).
From what I can tell, neither stationary target is is now lighting in game - switch AX never engages in game. I can manually light the stationary target switch by activating "AX" switch under the pf. This turns on the left target light, but it does not register when hit.
Quoted from StratDoc:switch AX never engages in game.
These are the sw. that energize AX. Did you check the M/B sw. on A yet? and have you checked for shorts, such as solder drips, connections touching, etc?
Capture (resized).PNGQuoted from StratDoc:the stationary targets are lighting properly. When activated, they fire the Knocker and the orange coil in the backbox shown below. No points register.
So you're getting a credit there. Now, they still score correctly when unlit?
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Chattanooga, TN