Basic HTML Version
OEOICATED SWITCHES
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1
Orange-Brown (U17·5) 01
14
4
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Orange-Red
(Ul;~7) 02
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2
13
5
3
I
Orange-Blac\(
,.<U17·11) 03_+
12
6
1
I
Orange- Yellow
-
I
.0
4
(U17-9) 04
17
6
, Orange-~.reen (U16-9) 05
I
11
7
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7
J
Orange-Blue
(U16-' 1) 06
1
10
8
I
I
(U16.7) 07
I
I
8
Orange-Violet
9
9
9
I
Orange-Gray
(U18-S)
o~l
8
11
J
11
II
Black
..
I
15
3
_[ ..-_!I
1--
-
L_
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 Down; Test Function, Down
07· Normal Function, Volume Up; Test Function. Up
08 -
Normal Function, Begin Test; Test Function, Enter
DEDICATEO SWITCH CIRCUrr
SWITCI:I,·tt
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OPEN Ii
H L OFF
CLOSED L L H ON
r --~
COIN DOOR
INTERFACE
BOARD
r'cPU BOARD
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14lS240
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L .... '__. _
Dedicated Input
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The dedicated switches operate similar 10switches in the matrix. except that Instead of a column circuit there is a direct tie
to groond. 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,
therefore the output is low. Since the row circuil (dedicated input) is tied
direCtly
to ground through the switch, the switCh is
considered closed by the microprocessor. When Ihe switch opens, the '." input to the LM339 is above
+5V.
its output is
high and the row is inactive.
3-3