Pinouts of Connectors

JAMMA connector pinout

layout
schematic diagram

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JAMMA=Japanese Arcade Machine Manufacturers Association

56 pin JAMMA special connector pin-out & layout
56 pin JAMMA special connector  at the arcade game

An old group trying to set standards for board pinouts (at arcade machines). This was designed to make board changes easy, just take out the old game and plug in the new. Unfortunately games have evolved, and the Jamma standard is no longer up to the job as it can`t handle more than 4 buttons or two players. Also replacing a board from a different manufacturer meant readjusting the picture on the monitor as it would not be centred in the same position.

Sold side

Pin Description
A Ground
B Ground
C +5V
D +5V
E -5V
F +12V
H Key (no connection)
J Meter 2
K Lockout 2
L Speaker -
M Audio Ground
N Video Green
P Video Sync
R Service Switch
S Tilt Switch "Pinball Slam"
T Coin 2
U 2 Player start
V Player 2 Up
W Player 2 Down
X Player 2 Left
Y Player 2 Right
Z Player 2 Button 1
Aa Player 2 Button 2
Ab Player 2 Button 3
Ac (Player 2 Button 4)
Ad Not used
Ae Ground
Af Ground

Component side

Pin Description
1 Ground
2 Ground
3 +5V
4 +5V
5 -5V
6 +12V
7 Key (no connection)
8 Meter 1
9 Lockout 1
10 Speaker +
11 Audio +
12 Video Red
13 Video Blue
14 Video Ground
15 Test Switch
16 Coin 1
17 1 Player start
18 Player 1 Up
19 Player 1 Down
20 Player 1 Left
21 Player 1 Right
22 Player 1 Button 1
23 Player 1 Button 2
24 Player 1 Button 3
25 (Player 1 Button 4)
26 Not used
27 Ground
28 Ground

Note: All signals are active low.

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Pinouts.ru > Pinouts of different motherboard slots >  Pinout of JAMMA connector and layout of 56 pin JAMMA special connector

Source(s): JAMMA pinout at Technick.net, from Hardware Book
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