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CPUand Audio Visual Board Error Codes
The CPU has three LED's, 201, 202, and 203. At game turn-on LED 201 and LED 202 are on, LED
203 is off. During normal operation LED 201 is off, LED 202 is on, and LED 203 is flashing. If the
system detects an error the following happens:
CPU board error codes
Center LED blinks once
=
G11 ROM Failure
Center LED blinks twice
=
U8 RAM Failure
Center LED blinks three times = G10 Security Chip Failure.
The Audio Visual board produces one beep upon game turn on if the board is operating properly. If
the system detects an error the following happens:
Audio Visual board error codes
1 Beep
=
Audio Visual Board is O.K.
2 Beeps = 82 Failure
3 Beeps
=
83
Failure
4 Beeps
=
84 Failure
5 Beeps
=
85
Failure
6 Beeps
=
86 Failure
7 Beeps = S7 Failure
10 Beeps
=
Audio Static RAM Failure
Opto Theory
The opto receiver (Photo Transistor) should be approximately 0.1 - 0.7 volts when the opto beam is
unblocked and approximately 11 - 13 volts when the opto beam is blocked. The opto transmitter
(LED) should always be approximately 1.4 volts.
Note: The transmitter (LED) is larger than the receiver (Photo Transistor); it protrudes further from its
case.
LED
Board
Transmitter
1.0-1.
Volts
Photo Transi tor
Board
Receiver
D.l-D.7V
Unblocked
11-13V Blocked
Infrared Ray
Gray-XXX
Block
Gray-Yellow
Orange-XXX
1-45