Classic Mode

Star Tech Journal

Issue: 1981-December - Vol 3 Issue 10

S*TJ DECEMBER 1981 17
ORANGE WIRE FROM A2J1-5
------
RED WIRE FROM A2J1-8
-------~
INLINE FUSE HOLDER WITH 10 AMP FUSE
YELLOW WIRE WITH BLACK
~
TRACE FROM A2J2-1
...:.::c::..=_:_ _ _ _ _ _ _ ...J._ _ _ _ _ _ -cJ
ORANGE WIRE FROM A2J3-10
2 BLUE WIRES FROM TRANSFORMER TERMINAL
17
------~-----17
RED WIRE FROM -
A2J3-11
--------<
K_____
INLINE FUSE HOLDER WITH 10 AMP FUSE
BUSS
RETURN
BACK BOX
A2J3-1
A2J3-2
BACK BOX
A2J3-10
A2J3-11
J3
Pin 1 GREEN WIRE
Pin 2 WHITE WIRE
J3
Pin 10 ORANGE WIRE
Pin 11 RED WIRE
PLAYFIELD J1
Pin 1 WHITE WIRE
A2J1-1
Pin 2 GREEN WIRE
A2J1-2
PLAYFIELD J1
A2J1-5
Pin 5 ORANGE WIRE
A2J1-8
Pin 8 RED WIRE
CABINET
A2J2-5
CABINET
A2J2-1
J2
Pin 5 GREEN WIRE WITH
RED TRACE
J2
Pin 1 YELLOW WIRE WITH
BLACK TRACE
Use the wiring diagram for the game you are modifying and count the pins carefully. Sometimes Bally will
substitute wire colors or if you bought the game used, someone may have changed the wires.
CRIM electronics
offers the Model VG-1 Test Unit
for color and black & white monitors.
This attractive, versatile, and portable video
generator can be used for on-location testing
or in the shop for troubleshooting all types of
color or black and white monitors. Color monitors:
select a Red, Green, or Blue video pattern for
isolating color problems. Select "All Colors" for
a white pattern; ideal for color convergence.
Black and White: unit supplies all power, sync,
and video signals to test/troubleshoot a suspect
B/W monitor. Model VG-1 comes complete with
operating instructions, and video cables for
direct interfacing to most all popular color and
B/W monitors.
$219 -NOW-
IN STOCK
Sample Listing of Model VG-1
Compatible Monitors
Games
8/W
Color
Motorola
Electrohome #CO2 Midway "Galaxian", "Pac-Man"
Electrohome #GO? Atari "Missile Command", "Centipede" TEC
Gremlin "Carnival", "Astro Blaster"
Wells
Wells Gardner
Gardner
Exidy "Targ", "Spectar", "Venture"
Centuri "Eagle", " Phoenix"
Stern "Scramble", "Super Cobra"
All units are guaranteed for 90 days from date of purchase. Please call for quantity discounts.
On prepaid orders, we pay freight. Dealer inquires invited.
CRIM electronics
P.O. Box542
Pennsauken, New Jersey 08110
609-667-0302
S*TJ DECEMBER 1981 18
EXIDY
MONITOR
* ADJUSTMENT *
PROCEDURE
To Freeze Picture For Monitor Adjustment
If you have to adjust the color on your
monitor or make other adjustments, you
may wish to "freeze" the picture. The
easiest way to do this is to activate one
of the coin switches. While the switch is
activated, the picture will "freeze" on
the screen, and as long as you hold down
the coin switch it will remain frozen.
Another way of doing this is to jump
the switch terminals together or remove
either of the wires and place it on the
empty terminal. Do your adjustments
and then disengage your coin switch.
COIN DOOR
- 0
0
0
0
'---
0
0
COIN SWITCH
SWITCH TERMINALS
Checking Voltages on Exidy "Venture"
One of the first things
to check when you have
a problem is your
voltage. A good place
to check for all your
voltages is at the con-
nector P-5 on the
Audio/Color board.
The voltages should be
shown at right with
connector connected to
the audio/color board.
P-5
1
GND
2
+12vdcHI
-12vdc HI
-12vdc LO
-5vdc
+ 12vdc LO
SPKR(A)
3
4
5
6
7
+5vdc
SPKR(B)
8
9
10
11
12
13
14
15
EXIDY
The traces on the audio color board
connect 2 pins each from the connector
so that you have the same voltages at:
pin 1 & 15
gnd
2& 14
+ 12vdc HI
3 & 13
-12vdc HI
4 & 12
-12vdc LO
5 & 11
-5vdc
6 & 10
+ 12vdc LO
7 & 9
Speaker (A) and (B)
8
+ 5vdc
l
* "MOUSETRAP" * SPECIAL * DEVICE * NOTES
Exidy "Mousetrap": Microprocessor On Logic Board
"Mousetrap" uses two microprocessors on the
audio board (a 6502 and a Z-80) and one
microprocessor on the logic board (a 6502A).
The logic board must use a 6502A otherwise
it will not operate correctly. On the audio
board any 6502 will suffice.
Example:
2114-25
Exidy "Mousetrap": 2114 Logic Rams
The logic board on "Mousetrap" uses (8) 2114
RAMs. The speed of these RAMs must be
300 nanoseconds or less or the system will
not operate correctly. The way to identify how
fast these are is to look at the number
following the 2114 marking.
2114-25 means the speed of this RAM is
250 nanoseconds.
If you have any questions concerning this
information, call Exidy Customer Service at
(800) 538-8402 or (408) 734-9410.
COURTESY OF EXIDY'S TECHNICAL NEWSLETTER " ZERO DOWNTIME"

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