Ok, I guess I am late to the party. Glad someone was able to use the schematics I uploaded to IPDB.

LED's work in this game just fine (I have a few installed in mine - not all, mostly in the areas where damage usually occurs from the heat of the bulbs (pop bumpers, etc)).

Free play is simple - you just jump out the "no credits" switch on the credit unit. You can see which switch opens when the reel hits zero - just jumper it out (I just used a short lead with alligator clips, easy to remove if need be).

I will post a picture(s) of my credit unit sometime tonight or on the weekend that shows the jumper and switches.

What I think Rolf is saying sounds about right (without look at the schematic).

Sorry for not getting pictures - had some things comes up and completely forgot. My bad.

I will check my coin door tonight.

Pinball Resource should have the parts you need (parts manual is on IPDB). There are also a couple thread on hear where someone created files so that you can 3D print some of the plastic parts as well and made them available for download.

https://pinside.com/pinball/forum/topic/3d-printing-chicago-coin-hollywood-score-reel-arm#post-2947759
http://www.thingiverse.com/tmuir12/designs

Ok, checked mine.

Coin door:

Red with green chaser (broken line) goes to the coin lock out coils for the coin mechs - there are 2 wires on the right most coil when looking at the back of the coin door. 1 wires goes to the door plug (I may have added the plug, so yours may not have one). The other wire goes to the coin lock out coil on the left mech. The other wire is solid green on mine, but that looks like it was replaced someitme in the past (again I may have done that). I only took picture of the left coil.

Now there are also orange wires which could look like the red ones - those go the the coin up switch(es)

Credit unit:

top switch is closed and bottom one jumper out.

If you need some more pictures, just me let me know - I will try and be more punctual.

Edit to add: note my credit unit is current at no credits.

IMG_1206 (resized).JPG
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Ok, I will check when I get home where it goes, but if I had to guess right now, it is to the slam switch on the door.

Red and black wire goes no place on mine - was tucked inside the harness (sorry about the crappy picture).

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I would double check the gaps of the switches on the score motor, especially the double stack one (make and break switches). If the gap is too small it can cause "timing" issues of when the motor turns on/off.