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problems may often be resolved by adjusting the wire switch actuators, fixing switch circuitry
problems, securing loose connectors, etc. Mechanisms using 'opto switches'
(drop targets, etc.)
need to be checked for proper power connections (+12V dc and ground).
CHECK FUSES F115 AND F116 AND OPTO 12V SUPPLY
This message will be displayed if the game senses that all optical switches are not functioning. This
usually occurs when there is no 12V supply to the playfield optics.
The problem is likely to be a blown fuse (F109), or at connectors J138, J139, J140 or J141 on the
power driver board.
OPTO TROUGH BAD CHECK CONNECTORS, WIRES AND 12V SUPPLY.
This message will be displayed if all of the optics in the playfield ball trough are not functioning. This
is usually caused by a problem with a ball trough connector supplying 12V and ground for the optical
circuits.
PINBALL MISSING.
This game normally uses five balls, however, it will operate with less. This message announces that
a ball is missing or stuck. When the ball is located, return it to the game via the Outhole. Other
possibilities for this problem could be malfunctions of the Ball Trough switches or the Ball Shooter
switch.
XXXX SW. IS STUCK ON.
This message indicates that a switch, which is not usually On, remains in the On position after the
game is switched On. The stuck switch is essential for game play (for example, a coin chute switch,
the slam tilt switch, the plumb bob tilt switch), and should be cleared to permit proper game
operation.
GROUND SHORT ROW - N, WHT - XXX.
This message indicates that '(he switch wires being called out are touching a grounded part on the
playfield or coin door. The following should be checked:
1. Slam tilt (or other coin door switch) touching the grounded coin door.
2. A leaf-type, playfield switch touching a grounded part.
3. Players poking metallic objects (wires, coat hangers, etc.) into the game.
4. Switch cable insulation pierced or damaged allowing bare wire contact with a grounded part.
5. All switches in a row closing at the same time.
Note:
This is NOT a switch problem; however, for
most games it is a very rare possibility.
G10 ERROR
The security chip is incorrect or faulty. If this occurs, replace the security Chip.
G11 CHECKSUM ERROR.
The game ROM checksum is invalid. If this occurs replace the game ROM.
TIME AND DATE NOT SET.
The real time clock is not set. Go to U.4 of the Utilities Menu and set the time and date.
FACTORY SETTINGS RESTORED.
This message indicates that the CMOS RAM (U8) no longer retains any custom Pricing or Game
Adjustment settings and has reverted to factory default settings. Generally, the following CPU checks
will isolate the cause of the CMOS RAM memory failure. The voltages at pin 28 and pin 26 of U8
should be +SV (game turned On) and at least +4V (game turned Off). When the voltage drops below
+4V, memory reset occurs. Check the batteries and battery holder. Be sure that the batteries are
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