Hi Droptarget
You got it cheap, You are not loaded with bread - as long as we are on "basic stuff": We can use information from ipdb.org. When You have problems with game-specific playfield-features: A schema would be helpful.
Great, the Alternate Relay worked - not so great: again "not working". I must ask - when adjusting the 9's switches: did You bend something (other) has a wire broken-off somewhere ? (DID YOU ADJUST SWITCHES ?)
No-Match Unit: The Flyer in ipdb says : YES.
It does not work. I never had a look into a Chicago-Coin pin. I do not know, if CC-Pins let the No-Match Unit turn - EVEN when the feature is "toggled-off" ? Anyway, look and adjust to "On": The Jones plug, see Dolphin: http://www.ipdb.org/showpic.pl?id=699&picno=18684&zoom=1 - on the picture it is set "In/On". Wires soldered on ? plugs and sockets clean ?
By the way: Do You have it on 5 balls per play (I prefer) - or on 3 balls per play ?
When The No-Match-Adj-Switch is not in the Cabinet: look in the Backbox. Williams used on my Shangri-La a "switch to turn". If the switch is in the cabinet: There must BE wires from the switch up into the Backbox (for Score-Reels / Replay-Counter) - therefore: check ALL Jones Plugs connecting in-between Cabinet / Backbox (/ advised: Playfield).
ipdb has schema / manual for Dolphin - (almost) good for nothing. Lets look at Juke Box: http://www.ipdb.org/machine.cgi?id=1324 -> look at "Parts Manual" -> page-30 -> Number "6" is the only switch I see, I suppose it is the "End-of-Stroke-Switch (to open the circuitry of the related Points-Relay). I do not see other switches. Number "1" is the Wiper Finger Assembly, on PAGE-36 I see a drawing of "Scoring Drum Assembly". I believe: I see 6 wiper fingers. YOU MUST BE the detectiv: When You sneak a thin piece of paper in between "Board" and wiperfinger (insulation): The finger can move / turn - BUT there is never a connection. Try on several / all fingers - Can You say "finger-alpha is for "9-pos-carry-over"" ? Other fingers are for ???
Are some "copper traces" on the board connected ? 1 and 3 and 5 and 7 and 9 (all together) ? This would give a hint for "used for Alternate Relay" ?
We might have to use Jumper-Wires for testing. We must KNOW the "color of (I believe) 30 Volt Power-Wire". Look at the bottom of ipdb-schema Stage Coach, the transformer: Transformer-Power-side -> wire-color-white-Green -> FUSE -> wire-WHITE IS THE POWER-WIRE WE WANT TO IDENTIFY. Does Your pin also have Wire-WHITE for "POWER". Look at "coils on relays" - most have on "one lug" at the coil a wire-color-WHITE soldered-on --- the other lug(s) have many different colors (wires soldered-on).
Can You find out and GARANTEE "POWER-WIRE HAS COLOR-???" (I hope for "White") ?
Please look for Color (Power-Wire) , Adj. switch(es), Jones Plugs, Score-Reel Wipers - and write about. Next steps depending on Your answers.
Greetings Rolf