Basic HTML Version
Dedicated SWitches
,
, CPU BOARD
J20S '
:- COIN DOOR
iNTERFACE - -,
Coin Acceptor
, J1
BOARD J3:
Control°~/tches
'T
'Oranae-Brown IU17-S\
rn '
14
~
,
4
1---,---0
,
,
,
2
'Orange-Red
(U17-7) 02 '
,
13
5
,
,
,
,
3
'Orange-Black (U17-11) 03 '
12
6~~
,
,
,
'Orange-Yellow (U17-9) 04 '
,
4
17
,
,
,
,
6
'Orange-Green (U16-9) OS'
7~""'_
11
,
,
,
'Orange-Blue
,
,
7
(U16-11) OS , 10
8~~
,
,
,
'Orange- Violet
(U1S-7)
,
,
8
07,
9
9~~
,
,
,
,
,
,
9
,Orange-Gray (16-5)
08,
8
11
~"o--.,
,
,
,
,
,
,
_c~
,Black
,
15
3
,
,
,
,__
L__
,
I
~
,
'-
-
-
- - -
-
- -
-
-
- -
-
~
Dedicated Switch Circuit
I
CPU
BOARD
+sv
J20S
Coin Acceptor Switches
01 Left Coin Chute
02 Center Coin Chute
03 Right Coin Chute
04 Forth Coin Chute
Control Switches
05 Normal Function: Service Credits
Test Function: Escape
06 Normal Function: Volume Oown
Test Function: Down
07 Normal Function: Volume Up
Test Function: Up
08 Normal Function: Begin Test
Test Function: Enter
,- - COIN
DoOR - ,
INTERFACE
BOARD
J1
, Coin Acceptor
J3'
or
, Control Switch
,
Orange-XXX'
x
1--_---1
x
-:--0
Dedicated Input
Black
~-----~'~1S 3~
~
I
-
l
,
Switch
H
L
A
B
C
L Off
H On
H
L
Open
Closed
1
•.•
.J
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 swhch closes the row side (dedicated input) of the circuit activates. The "+. input to the LM339 drops below
+5V
therefore its output is low. Since the row circuit (dedicated input) is tied 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.
,Si.i/il iilEA
THEREXTIiEREUnllR 3-3