Gottlieb System 1

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1 Introduction

Of the big 4 pinball makers, Gottlieb was slowest converting from EM to Solid State, producing EMs into 1979 while Bally, Stern, and Williams had all abandoned doing so in 1977/early 1978. The Gottlieb system 1 boardset was designed by Rockwell International, to directly replace the EM logic from the earlier machines. Consequently System 1 games play almost exactly like an EM, just with Solid State scoring.

The playfield layouts were solid EM-esque designs, with rock-solid Gottlieb mechanical parts. Unfortunately, the electronics were not as robust in terms of longevity - exhibiting major problems with connectors, battery corrosion issues, and unavailability today of essential system chips.

One of the biggest issues with the System 1 platform was that it had unreliable ground connections. Unlike the other popular manufacturers of the time, Gottlieb relied solely on connectors and daisy-chained wiring to transport the ground lines from board to board. A large ground plane was used behind the boards, but the circuit boards' grounds were not physically secured to it. Gottlieb opted to use plastic standoffs to elevate and secure the boards to the backbox instead. Thus, if a single ground connector failed in the chain, the logic ground could fail for one or several of the circuit boards. This could potentially lead to locked on coils, relays, and / or controlled lamps. In turn, transistors and chips would fail.

2 Games

Title	Date of Release	Production#	ROM	Sound	Notes
Cleopatra	11-1977	~7300	A or 409	Chimes	Also produced as a 4-player EM 'Cleopatra' and a 2-player EM 'Pyramid'
Sinbad	05-1978	12950	B	Chimes	Also produced as a 4-player EM 'Sinbad' and a 2-player EM 'Eye of the Tiger'
Joker Poker	08-1978	9280	C	Chimes	Also produced as a 4-player EM 'Joker Poker'
Close Encounters of the Third Kind	10-1978	9950	G	Chime board	Also produced as a 4-player EM 'Close Encounters of the Third Kind'
Dragon	10-1978	6550	D	Chime board	Also produced as a 4-player EM 'Dragon'
Charlie's Angels	11-1978	7950	H	Chime board	Also produced as a 4-player EM 'Charlie's Angels'
Solar Ride	02-1979	8800	E	Chime board	Also produced as a 4-player EM 'Solar Ride'
Count-Down	05-1979	9899	F	Chime board	Also produced as a 2-player EM 'Space Walk'
Pinball Pool	08-1979	7200	I	Chime board
Totem	10-1979	6643	J	Sound board J-SND ROM
The Incredible Hulk	10-1979	6150	K	Sound board K-SND ROM
Genie	11-1979	6800	L	Sound board L-SND ROM
Buck Rogers	01-1980	7410	N	Sound board N-SND ROM
Torch	02-1980	3880	P	Sound board P-SND ROM
Roller Disco	02-1980	2400	R	Sound board R-SND ROM
Asteroid Annie and the Aliens	12-1980	211	S	Sound board S-SND ROM	Only available as a single player game

Conversion kits for system 1 from other manufacturers:

• (circa 1982) Movie (Bell Games, 4p)

• (unknown date) Sky Warrior (IDI, 4p)
• (circa 1982) Tiger Woman (IDI, 4p)

• 1984 Sahara Love (Christian Automatic, 4p, production 150) [conversion of Sinbad]
• 1986 L'Heaxagone (Christian Automatic, 4p, production 150) [original playfield design]

• 1985 Jungle Queen (Pinball Shop, 4p) [playfield based on Gottlieb's Jungle Queen]

3 Technical Info

3.2 Switch Matrix

The Gottlieb System 1 switch matrix consists of a maximum of 40 switches. There are a total of 5 switch strobes, (starting with 0, ending with 4), and 8 switch returns, (starting with 0, ending with 7). However, not every switch in the matrix is used on every System 1 game.

The first number of every switch is its return number, while the second number is the switch's strobe number. An example would be switch 54. Switch 54 is located on return 5 and strobe 4 of the switch matrix. It should be noted that the switches on return 0 are always the same for every System 1 game. The following switches have the same designations:

• Switch 00 = Test Switch
• Switch 01 = Coin Switch #1
• Switch 02 = Coin Switch #2
• Switch 03 = Credit (Start) Button
• Switch 04 = Tilt Switches

Although the switch matrix is being discussed here, it should also be noted that there are three switches used in System 1 games, which are not on the switch matrix. These three switches are the two slam switches and the outhole switch. Each game has two slam switches. The first is a weighted, normally closed switch on the coin door. The second is a normally closed switch on the ball roll tilt cage. Neither the slam switches nor the outhole switch have a switch number designation.

	Strobe 0 (A1J7-2 / A1J6-8)	Strobe 1 (A1J6-3 / A1J6-4)	Strobe 2 (A1J7-4 / A1J6-5)	Strobe 3 (A1J7-7 / A1J6-6)	Strobe 4 (A1J7-6)
Return 0 (A1J7-12 / A1J6-3)	00	01	02	03	04
Return 1 (A1J7-13)	10	11	12	13	14
Return 2 (A1J6-14)	20	21	22	23	24
Return 3 (A1J6-17)	30	31	32	33	34
Return 4 (A1J6-16)	40	41	42	43	44
Return 5 (A1J6-15)	50	51	52	53	54
Return 6 (A1J6-11)	60	61	62	63	64
Return 7 (A1J6-10)	70	71	72	73	74

3.3 Chimes vs. First gen chime board

The first three System 1 games: Cleopatra, Sinbad, and Joker Poker all used EM style chimes. Starting with Close Encounters of the Third Kind through Pinball Pool, a first generation chime board was used that generated three tones. The chime board used the same three solenoid drive transistors for input as the chime units, making them interchangeable.

3.3.1 Converting from Chimes to Chime Board

This is a stub.

3.3.2 Converting from Chime Board to Chimes

This is a stub.

3.9 Setting up a Game for Free Play

Early Gottileb solid state pinball machines, prior to 1990, did not have a free play option available within the game settings. With this simple modification, a game can be set up for free play. First, identify the diode strip in the bottom of the cabinet. Once the diode strip is found, locate the credit button and coin switch strobe line wires. The wires will be located on the left of the diode strip - the non-banded side of the diodes. Below is a list of the wires.

Credit button wire - Green-White or Brown-Yellow-Yellow

1st coin switch wire - Orange-White or Brown-Red-Red

2nd coin switch wire - Brown-White or Brown-Orange-Orange

Gottlieb System 1 Transformer Board

Solder a small lead wire from the credit button wire to any of the coin switch wires. Make certain that the diode, credit button wire, and coin switch wire are still soldered securely to the diode strip terminal when finished. If soldering is not an option, use a small alligator clip test lead. Now, when the credit button is pressed, a credit will be incremented and decremented. A game can be easily started without the need to open the coin door to trip the coin switches anymore.

4 Problems and Fixes

4.1 Power Driver Issues

This may not apply to some, as MPU might have been part of it.

4.4 Display Driver Board

Possibly doesn't apply to some, can't think of an example.

5 Game Specific Problems and Fixes

Example would be servo controller on Independence Day pinball

6 Repair Logs

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