Basic HTML Version
•
GAME WON'T POWER UP
Your game doesn't complete the power-up sequence.
•
ACTION TO TAKE
[] 1.Using a meter, check fuses on the power module as-
sembly.
[ ] 2.Turn power off and open the backbox. Locate the LED
(Light-Emitting Diode) on the 6803 Control Board.
[ ] 3.lf
+
5VDC and
+
14VDCare present on the Control
Board, the game performs a test.
When you encounter no
problems, the game powers up immediately, without flash-
ing the LED.
If the game detects problems, each flash of
the LED indicates passage of another test. See the chart
below.
•
••
•
•
CONTROLBOARDPOWE~UPTESTSEQUENCE
1st Flash:
Internal RAM at microprocessor U1 is good.
•
2nd Flash: Program ROM U2 is good.
3rd Flash:
Program ROM U3 is good.
4th Flash:
CMOS RAM U4 is good.
5th Flash:
PIA-O,chip U8 is good.
6th Flash:
PIA-1, chip U7 is good.
•
7th Flash:
Internal display interrupt generator U1 is good.
8th Flash:
U8 and U12 can correctly operate phase B,
switched illumination.
(Power Supply fuse
F5
protects the
Phase B circuit.)
9th Flash:
U
1,
U
11
and U12 can correctly operate phase A,
switched illumination.
(Power Supply fuse
F4
protects the
Phase
A
circuit.)
•
4-2