EM Repair

Note: This page is a work in progress. Please help get it to a completed state by adding any useful information to it.

1 Introduction

Put system info here

3 Games

The "Big Three" manufacturers were Gottlieb, Williams and Bally. The "best of the rest" would probably include: Chicago Coin and Midway as well as some foreign brands such as Recel, Playmatic and Rally. There were many companies that only produced a few games, especially early on.

A quick search of the Internet Pinball Database:

http://www.ipdb.org/search.pl?gtype=EM&searchtype=advanced

Shows that between all the manufacturers, there are over 3403 games within this very broad category.

--Newmantjn 18:33, 22 April 2011 (BST)

4 Technical Info

4.1 Start-up Sequences

The following is the start-up sequence for a Gottlieb Southern Belle. The Southern Belle is a woodrail from 1955 with lightbox scoring. In other words, it has no score reels. Other Gottlieb woodrails from this era will be similar, but not exactly the same. You will need to consult your schematic and figure out the exact sequence if it differs slightly from the one below:

Southern Belle Start Sequence: 1. Push start button, pulls in start S relay

2. Start relay resets 100K unit, closing switch at -1 position on 100K unit

3. Closed switch at -1 position pulls in Z relay

4. Z relay pulls in ball release coil which is held on by 2 ball hole switches and a switch on the ball release unit

5. The balls move off the two switches, opening the two switches, so now the ball release coil is retained by Z only.

6. Switch on Z relay closes and allows pulsing of 10K unit through Motor 1A

7. 10 K unit continues to pulse until it hits position 9 or 19 or 29 on the 10K unit, then the "bridge" there, in series with the NO switch (which closes once/pulse) on the 10 K unit pulls in the M relay.

8. The M relay steps the 100K drive coil up and stays pulled in until the 100K NC switch is opened (upon stepping once)

9. The 100K step moves the 100K stepper off the -1 position, opening the switch on that keeps the Z relay pulled in.

10. The Z relay releases – the 10K unit can no longer be pulsed though the switch on the Z relay.

11. Z relay opening also releasing the ball release coil.

12. The N flip/flop switch seems somewhat redundant in this setup.

7 Game Specific Problems and Fixes

Example would be servo controller on Independence Day pinball

8 Repair Logs

Did you do a repair? Log it here as a possible solution for others.