Basic HTML Version
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 opto switches 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 four 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.ls 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, and the plumb bob tilt switch), and should be cleared to permit proper game
operation.
Ground Short Row - N, Wht - XXX
This message indicates that the 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 +5V (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
good and that there is no contamination on the battery holder terminals. Turn the game OFF, and
use an ohmmeter to check diodes 01 and 02 on the CPU Board.
01 should read 0 ohms when
forward-biased and infinite ohms when reverse-biased.
02 should read 15 ohms when forward-
biased and infinite ohms when reverse-biased.
(Readings taken with an analog meter.) This
message can also indicate that there is an open diode on a 50V coil circuit and noise is entering the
circuit.
1-44