Basic HTML Version
DEDICATED SWITCHES
CPU Board '
J205
Coin Acceptor
I
or
I
Control Switches
Coin Door Interface Board
, JI
J3
'T
' Orange-Brown (UI7-5) DI
,
r-r-
r- ,
,
,
4
4 -,---() ~
,
,
I
, Orange-Red (UI7-7) D2
,
3
5
I
2
I
,
,
I
, Orange-Black (UI7-11) D3
,
I
3
2
6 -+---<>"
,
,
I
: Orange-Yellow (UI7-9)
,
I
4
D4
,
I
7
,
,
I
,
,
I
, Orange-Green (UI6-9) D5
,
7
f-:---()
6
,
I
,
,
I
, Orange-Blue (UI6-11) D6
,
8
I
7
0
~
,
,
I
, Orange-Violet (UI6-7)
,
I
8
D7
,
9
9 f---'---<>"
,
,
I
,
,
I
9 ' Oranae-Grall
(16-5)
QI;l
,
8
I
f-'---()
I
,
I
,
,
I
I
Black
I
~5
3
I
__c-
I
f-,------
-
~
~
DEDICATED SWITCH CIRCUIT
I
CPU Board
+5V
Coin Door
Coin Acceptor Switches
DI Left Coin Chute
D2 Center Coin Chute
D3 Right Coin Chute
D4 Forth Coin Chute
Control Switches
D5 Normal Function: Service Credits
Test Function: Escape
D6 Normal Function: Volume Down
Test Function: Down
D7 Normal Function: Volume Up
Test Function: Up
D8 Normal Function: Begin Test
Test Function: Enter
Interface
Board
,
I
Coin Acceptor
J3,
or
A 1N4148
'
Control Switch
r----,I\/\/'--.-~-__i
X
I
Orange-XXX
I
X t------i X ~
lK
12K
J205
I
I
Jl
Dedicated Input
I
Black
~----~15
3~----------~
SWitch
Open
Closed
The dedicated switches operate similar to switches in the matrix except that instead of a column circuit there is a direct tie to
ground. Therefore, the column side is constantly active (low).
When a switch closes the row side (dedicated input) of the circuit activates. The "+" input to the LM339 drops below +5V
causing its output to go low. Since the row circuit (dedicated input) is tie'i directly to ground through the switch, the switch is
considered closed by the microprocessor. When the switch opens, the" +" input to the LM339 is above +5V, its output is high
and the row is inactive.
Judge Dredd 3-3