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IX.
TROUBLESHOOTING
ON LOCATION
1A)
SYMPTOM:
Game does not play power-up tune when power
is turned on. General illumination is present.
ACTION:
A) Turn power OFF. Open back box. Locate light
emitting diode (LED) on Control Board.
B) Turn power ON. LED must flash
ax
to indicate
that the module is good. Correct sequence is
flash-pause-flash and then six more flashes
and LED goes out.
C) If LED does not come on, or does not flash, or
flashes, but less than
ax,
tu rn off power. Check
fuses. If fuses are good, replace Control Board.
CAUTION: Replacement
Control
Board must
have same Part Number or incorrect operation will
result! See Parts List for Control Board.
Turn power ON.
D) If game is correct, it is now ready for play. If
game is not correct, contact the Bally-Midway
service department.
2A)
SYMPTOM:
Not all feature lamps light during play.
ACTION:
A) With power ON, open front door. Enter '90' on
keyboard. If game is correct all feature lamps
flash ON and OFF.
B) Carefully raise playfield or open back box to
gain access to lamps .
C) Replace bulbs that do not flash.
D) If game is correct, it is now ready for play.
E) If game is not correct, turn power OFF. Replace
Control Board. Turn power ON and repeat A.
F) If game is correct, it is now ready for play.* If
game is not correct, contact the Bally-Midway
service department.
ACTION:
A) With power ON, open front door. Enter '91' on
keyboard. If the game is correct, each digit on
each Display Driver Module (5 used/game)
displays the count 0 - 9 continuously in all
7
digit positions. Note defective Display Driver
modules.
B) Turn power OFF.
WARNING: High Voltage is supplied to the
Display Driver Modules, from the Power Module.
Wait 30 seconds for High Voltage to Bleed Off.
C) Replace Display Driver module(s). Turn power
ON. Repeat
A.
D) If game is correct, it is now ready for play.* If
game is not correct contact Bally-Midway
service department .
3B)
SYMPTOM:
All displays improper (all five Display Driver
Modules). Improper: Digit(s) always on or off/
segment(s) always on or off, all displays.
ACTION:
A) Repeat 3AA, and AB.
B) Replace Control Board. See CAUTION NOTE,
1C. Turn power ON. Repeat A.
C) If game is correct, it is now ready to play.* If
game is not correct, contact the Bally-Midway
service department .
3C)
SYMPTOM:
One or several displays always off.
ACTION:
A) Do 3AA, AB, AC, and AD.
B) Repeat 3BB and BC, if necessary
2B)
SYMPTOM:
One or some switched lamps always ON.
ACTION:
Repeat 2AA, AN, AE, and AF.
3A)
SYMPTOM:
Display digits improper on one or several, but less
than all Display Driver Module(s). Improper: One
or several segments always OFF, digits mottled or
several segments or digit(s) always ON.
*Turn power ON-OFF switch OFF and then ON.
4A)
SYMPTOM:
Solenoid(s) do(es) not pull-in during course of
game.
ACTION:
A) With power ON, open front door. Enter '92' on
keyboard,
B) If game was correct, each solenoid would be
energized. A number is flashed on the Player
Score displays as each solenoid is pulsed.
Note any numbers that do not have the sound
of an associated solenoid . (NOTE: If most of
the Playfield Solenoids DO NOT operate,
check the Playfield Fuse to see if it is blown. It
is generally found near the Flipper Assem-
blies.) See Solenoid Identification Table on
page 1-18.
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