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VI. TROUBLESHOOTING ON LOCATION
SYMPTOM: GAME WON'T POWER-UP.
Game does not play power-up tune when power is turned on and the general illumination lamps are lit.
ACTION:
A. Check fuses on Power Module.
B. Turn power OFF. Open Backbox. Locate light emitting diode (LED) on 6803 Control Board.
C. Turn power ON. LED must flash 9X to indicate that the Control Board is good. Correct sequence is flash-
pause-flash and then seven more flashes and then the LED goes out.
D. If LED does not come on or does not flash, or flashes, but less than 9X, turn off power. Check fuses. If
fuses are good, replace the 6803 Control Board.
CAUTION: Replacement Control Board must have same Part Number or incorrect operation will result! See
Parts List for Control Board on pages 2-13 thru 2-15 and EPROM Listing on page 2-33 .:
Turn power ON.
E. If game is correct, it is now ready for play. If game is not correct, contact the Bally-Midway Service Department.
SYMPTOM: LAMPS ARE ALWAYS ON OR ALWAYS OFF DURING GAME PLAY.
ACTION:
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A. With power ON, open front door. Select SELF TEST-Lamp Tests with keyboard. If game is correct all feature
lamps flash ON and OFF.
B. Carefully raise playfield or open backbox 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 6803 Control Board. Turn power ON and repeat step
A
F. If game is correct, it is now ready for play. If game is not correct, contact Bally-Midway Service Department.
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SYMPTOM: DISPLAYS
I. Display digits improper on one or several, but less than all Display Driver Module(s). Improper: One or several
segments always OFF, digits mottled (spotted), or several segments or digit(s) always ON.
ACTION:
A. With power ON, open front door. Select SELF TEST-Display Test with keyboard. Ifthe game is correct, each
digit on each Display displays the numbers 0 through 9 and the alphabet in all 7 digit positions in all displays.
Note defective Display Driver Modules.
B. Turn power OFF.
WARNING: High Voltage is supplied to the Display Driver Modules from the Power Module. Wait a minimum of
30 seconds for High Voltage to bleed off before servicing modules.
C. Replace Display Driver Module(s). Turn power ON. Repeat step A.
D. If game is correct, it is now ready for play. If game is not correct, contact Bally-Midway Service Department.
II. All displays improper. Digit(s) are always ON or OFF/segment(s) are always ON or OFF on all displays.
ACTION:
A. With power ON, open front door. Select SELF TEST-Display Test with keyboard. If the game is correct, each
digit on each Display displays the numbers 0 through 9 and the alphabet in all 7 digit positions. Note
defective Display Driver Modules.
B. Replace 6803 Control Board. Turn power ON. Repeat step A.
CAUTION: Replacement Control Board must have same Part Number or incorrect operation will result! See
Parts List for Control Board on pages 2-13 thru 2-15 and EPROM Listing on page 2-33.
C. If game is correct, it is now ready to play. If game is not correct, contact Bally-Midway Service Department.
III. One or several displays always OFF.
ACTION:
A. With power ON, open front door. Select SELF TEST-Display Test with keyboard. If the game is correct, each
digit on each Display displays the numbers 0 through 9 and the alphabet in all 7 digit positions. Note
defective Display Driver Modules.
B. Turn power OFF.
C. Replace Display Driver Module(s). Turn power ON. Repeat step A.
D. If game is correct, it is now ready for play. If game is not correct, contact Bally-Midway Service Department.
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