Basic HTML Version
T.14 Clock Test
This test may be used to test the mechanical clock in the game.
There are 8 opto sensors used to monitor the position of the clock hands. These 8 sensors are
wired in as a 9th column in the switch matrix. The column drive is the Gray-White wire attached
to pin J5-1 of the 8-Driver P.C.B. Assembly, pt #A-16100, (located on the left side-wall of the
backbox). This column is driven by 01 and 012 of the 8-Driver Board. The switch matrix row
connections are made to the normal white "row" switch matrix wires. This 9th column is shown
on the far right of the switch matrix, in the clock test:
Row 1 (Wht- Brn)
Row 2 (Wht- Red)
Row 3 (Wht- Org)
Row 4 (Wht- YeO
Row 5 (Wht- Gm)
Row 6 (Wht- Blu)
Row 7 (Wht- Vio)
Row 8 (Wht- Gry)
Column 9 (Gry-Wht)
15 minutes
o
minutes
45 minutes
30 minutes
Hour 1
Hour 2
Hour 3
Hour 4
The clock is operated through a D.C. Motor Control Board, pt #A-16120, (located UNDER the
playfield at approximately the same position as the clock) and solenoid drives 42 and 43
(located on the 8-Driver Board in the backbox). With only drive 43 turned ON, the clock moves
forward. With only drive 42 turned ON, the clock moves in reverse. With both drives ON, or
both drives OFF, the clock is stopped.
Using the clock test program:
The top line will show the current operation. Use the
red •
+"
and "-" coin door buttons to select one of the following functions:
Clock Forward Slow
Clock Forward Fast
Clock Reverse Slow
Clock Reverse Fast
Pressing the "Enter" button will "start" and "stop" the selected operation.
The display will indicate the state of the switch matrix and the clock, as shown below:
Dedicated Switch Column
Flipper SWitch Column
\
SWitch folumna 1-8
L
T
hc o l umn9
•
\
I
I
•
• •
•
• •
• •0
-0
CLOCK FWD SLOW
•
• • •
- - - D •
•
•
IKl
0 D D
• • •
•
- • • DO -0
0;00
• • O· - • • DO ·0
00
15
30
45
• • • 0 - •
.
-
.
- -
• • • 0 • -
• D·
0
[R]
0 D
[K]
12
•
•
•
•
•
- - -0
-0
HOUR
•
•
•
•
•
-
.
-
.
- -
I
HOUROPTOS
1
I
\
(TIme at lalit Qu.,...
Hour)
(Derived From Hour
aptos, See Table Below)
swrrCH MATRIX
Hour 4
Hour 1
DISPLAY PANEL VIEW
Twilight Zone 1-18