Hi Classicpinballs
I am not very happy with the schematics - some places the wire-color is not mentioned - a switch is drawn but no text to it - the Score-Motor-Switch-IND-C is a three-bladed M&B-Switch and it is drawn five times in the schematics - the text at the drawing of "Score-Motor" I do not understand "Brake-Part is '24 Volt broken off' " - hmm, never read such a text.
The schematics uses "Reset Relay and Reset Up Relay" - but Your picture in post-5 clearly shows "Reset Score Relay and ...ore Relay" --- the drawing of switches on Score-Motor-INDex-Cam lists switches A,B,C,D means four switches and in the picture in post-5 we see five switches - You write about "two tiny wires not connected to anything" - hmm, what wires ?
I have taken Your picture and added twice the letters "A" through "K" - questions: are truely "left A connected to right A" ? B to B ? ... K to K ? The tiny wires - are "E and F" ???
Lets find out about the switches on the INDex-Cam --- I believe "my K and my J" is IND-D is the Self-Hold-Switch for the Score-Motor run --- try - when the pin is idling - motor not running: Gently press the "my K blade" down a bit to get into contact with "my J blade" and then let go --- the motor should start running and do a turn of half of a revolution --- DOES the motor do this ? If Your answer is "Yes": We can identify "my K and my J" beeing Switch SCM-IND-D (?).
The schematics says "SCM-IND-A is an Normally-Closed Switch for Game-Relay, SCM-IND-B is an Normally-Closed Switch for Hole-Up-Relay" --- "my A and my B --- also my C and my D" are Normally-Closed-Switches - lets assume "all good".
My working thesis is "my E and my F" are the switch with UNUSED wires (is this true ?) - lets assume "all good".
So the remaining three blades probably are "the problematic zone" - "my G, my H, my I" --- when the motor is not running means at rest: "My G and my H" must have contact --- as the motor starts turning and when it is turning: "my H MUST move away from my G --- my H must move towards and get into contact to my I" --- question: DOES "my H moves AWAY from my G - "my H LOOSES contact with my G" ???
"my H has in Your picture soldered-on Wire-Yellow" --- the color of "my G" is well, something-with-maybe-blue ? --- please look at the steady pulling Reset-Relay - at the switches - at the switch "a short wire runs from one side of the coil on Reset-Relay to blade on the switch" - THIS Switch: Do You see the same wire-color something-with-maybe-blue on THIS Switch ???
Please have the pin toggled-off and the main power cord unplugged (Safety Reasons) - have the Score-Drums manually resetted - sneak-in a stripe of paper in-between "my G and my H" - to securely keep the contact-points of the two blades separated / apart --- then plug-in, toggle-on, start a game - what happens ? Have the symptoms of the fault dissapeared - means the motor does NOT run - Score-Reset-Relay does not actuate ?
Greetings Rolf
0Aerobatics-SCM-IND-pinside-Work-02 (resized).jpg