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Factory Settings Restored. Repeated appearance of this message indicates that the CMOS
RAM 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 voltage at pin 28 of U8 should be +5V (game turned on) and at least
+3.8V (game turned oft) . When the voltage drops below +3.8V. 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 art ohmmeter to check diodes D1 and
D2 on the CPU Board.
D1 should read 0 ohms when forward-biased and infinite ohms when
reverse-biased.
D2 should read 15 ohms when forward-biased and infinate ohms when reverse-
biased.
U6 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 running. If this occurs go to U.4 of the
Utilit ies Menu and set the time and date.
The CPU has three L.E.D .s located on the upper left side of the board. On game power-up the top
and bottom L.E.D.s turn On for a moment the, the top L.E .D. turns Off and the center L.E.D. starts
to blink rapidly . The bottom L.E.D . remains On . The system has detected a problem if the
following happens:
CPU Board LE.D. Error Codes
Center L.E.D. blinks one time
Center L.E.D. blinks two times
Center L.E.D. blinks three times
ROM ErrorU6
RAM ErrorU8
Custom Chip Failure U9
FUNHOUSE 1-43