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CPU L.E.D.'s
The CPU has three L.E.O.s located on the upper lell side ot the board D19, 020, and D21. On
game power-up 019 and D21 turn On lor a moment then, 019 turns Off and D20 starts to blink
rapidly. 021 remains On. The system has detected
a
problem
if
the following happens;
CPU Board
L.E.O.
Error Codes
Center
L.E.D.
blinks
one
time
Center LE.D. blinks two
times
Center L.E.O.
blinks
three times
U6 ROM
Failure
US RAM Failure
U9
Custom
Chip
Failure
Sound Board Beep Error Codes
Upon
Game
Turn-On;
1 Beep
2
Beeps
3
Beeps
4
Beeps
5
Beeps
Sound
Board O.K.
U9
Failure (RAM)
U18 Failure (ROM)
U15 Failure (ROM),
if
used
U14 Failure(Masked ROM),
if
used
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