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.

The following is the start-up sequence for a Gottlieb Roto Pool from 1958. You can see it is similar, but not exactly the same as the Southern Belle sequence.

Roto Pool Start Sequence:

1. Push start button, pulls in start S relay

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

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

4. U relay pulls in ball release coil, which remains on by the U relay, a switch on the unit itself and a flip/flop on the N relay

5. Switch on the U relay is closed, allowing pulsing of the 10K unit though switch on motor 1A

6. 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 10K unit pulls in the 0-9 coil relay

7. The M relay pulls in and is held in by it's own switch and a NC switch on the 10K unit and remains on until the 10K unit steps. The 100K step moves the 100K stepper off the -1 position, opening the switch on that keeps the U relay pulled in.

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

9. The N flip/flop switch activates at some point, releasing the ball release coil (IMO, this is a poor design, leading to a burnt coil for any number of reasons (no FMEAs at Gottlieb?)

Gottlieb Start-up Sequences from the 1970s

There is a great repository of Gottlieb start-up sequences gleaned from numerous game manuals here:

http://www.xmission.com/~daina/tips/pub/emTips.html

--Newmantjn 19:57, 22 April 2011 (BST)

70s Williams Start -Up Sequence (4 player)

1. When the start (credit) button is pressed, the credit unit is decremented. This is done through the CREDIT UNIT zero position switch and a set of parallel switches that ensure the game is in "game over" or still on player 1, ball 1, and not at the maximum number of players (COIN UNIT last position switch).
2. The end of stroke (EOS) switch on the CREDIT UNIT decrement coil energizes the COIN relay.
3. The COIN relay:
   • Trips the GAME OVER latch/trip relay once the PLAYER UNIT and BALL COUNT unit reach zero.
   • Energizes the RESET relay.
   • Runs the SCORE MOTOR.
4. The RESET relay:
   • Energizes the BALL COUNT unit reset through the SCORE MOTOR.
   • Energizes the GAME OVER relay latch coil.
   • Energizes the COIN UNIT reset coil.
   • Energizes the NO.1 and NO.2 (score) RESET relays, through the score motor.
   • Runs the SCORE MOTOR.
5. The score reset relays pulse and zero the score reels, through a switch on the score reel that opens in the zero position to stop the reset for that reel.
6. The SCORE MOTOR runs until all score reels and the BONUS UNIT reach the zero position.
7. The RESET relay decrements the BONUS UNIT until it reaches the zero position.
8. When the BONUS RELAY drops out it energizes the OUTHOLE relay through a different BONUS UNIT zero switch and through the SCORE MOTOR.
9. The OUTHOLE relay:
   • Runs the SCORE MOTOR and increments the BONUS UNIT once.
   • Energizes the BALL RELEASE coil which kicks the ball into the shooter lane.

4.2 Schematics

A guide to reading schematics is available here: http://tuukan.fliput.net/emkytkis_en.html

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.