Copy of Seeburg Site Page (no longer online)

Jamma Pinout

Solder Side			Parts Side
GND	A	1	GND
GND	B	2	GND
+5v	C	3	+5v
+5v	D	4	+5v
-5v	E	5	-5v
+12v	F	6	+12V
KEY	H	7	KEY
coin counter #2	J	8	coin counter #1
lock out coil #2	K	9	lock out coil #1
speaker (-)	L	10	speaker (+)
	M	11
video green	N	12	video red
video sync	P	13	video blue
service switch	R	14	video gnd
tilt switch	S	15	test switch
coin switch #2	T	16	coin switch #1
2p start	U	17	1p start
2p up	V	18	1p up
2p down	W	19	1p down
2p left	X	20	1p left
2p right	Y	21	1p right
2p button 1	Z	22	1p button 1
2p button 2	a	23	1p button 2
2p button 3	b	24	1p button 3
	c	25
	d	26
GND	e	27	GND
GND	f	28	GND

The following image Courtesy of http://www.spies.com/~arcade

freeplay adapter
To use this you just unplug the 8 pin plug in your jukebox and plug the above between the exsisting cable and socket.
Flip the switch one way and it's freeplay the other and it's normal operation.

It can be built like this or put into a box.

This adapter circuit should work for all M100A, M100B, M100BL, M100C, HF100G, HF100W, HF100R, HF100J, and HF100JL.
Unlike a version that is being sold on ebay this circuit will not release a single button press.
In other works if one key (letter or number) is pressed and a second is not the latch solenoid will remain on and not release.

It works by supplying a ground to the selector leaf switches which latches the selector solenoid. As long as the letter / number combo is completed the buttons will release and credit light will go off.

When time permits I will enhance this by adding a time out ct to disable the above if selection is not completed in a set time.
Which could be adjusted.

If anyone has the time and adds the timeout feature let me know, I'll include it here.

        Assault Joystick Repair Info - As the name suggests
           Assault Stereo Speaker Upgrade - Add stereo sound!
           Atari Game Info
         FAQ - Konami Pinout Class - As the name suggests
        Arcade Central - Arcade game sounds , Flyers etc
           Game Board Pinouts Archive - As the name suggests
           Basement Arcade - Great site, tons of info, including auction results and much more
           Mercury Amusement Co. - "Pinball information for collectors and homeowners"
           Phil's Arcade Links
           rec.games.video.arcade - Usenet.
           Video Games In The Movies
           rec.games.video.arcade.collecting - Usenet.<
           Switch Settings Archive - As the name suggests.
           Turaco - Edit game character sets.
           The Unofficial Atari Prototype Page - Great page on Atari
           Video Arcade Preservation Society - Video Arcade Preservation Society
           Wiretap Arcade Game Collector's Archive - "The 'Wiretap' Arcade Game Collector's Archive"