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CPU and Audio Visual board error codes continued ...
Upon game turn-on you will hear one of the following.
AUDIO VISUAL BOARD
BEEP ERROR CODES
1 Beep
=
Audio Visual Board is OK
2·Beeps
=
82 Failure
3 Beeps = 83 Failure
4 Beeps = S4 Failure
5 Beeps
=
85 Failure
6 Seeps
=
86 Failure
7 Beeps ;;;;;S7 Failure
10 Beeps ;;;;;Audio Static RAM Failure
OPTOTHEORY
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
1.0-1.1
Volts
Photo Transistor Board
Receiver
D.l-D.7V Unblocked
11-13V
Blocked
Infrored Roy
Gray-XXX
Block
Gray-Yellow
Orange-XXX