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3.
Individual Power Supply Fuse Blows
a) Disconnect load from portion of the power supply
that blows the fuse by disconnecting the appro-
priate plug.
L 3Fl (- 300VDC,
±
lOOVDC) disconnect 3P5
2. 3F2 (
+
28VDC) disconnect 3P4, 3P3
3. 3F3 (
+
18VDC) disconnect 3P4
4. 3F4 (6.3VAC) disconnect 3P3
5. 3F5
(+
5VDC) disconnect 3P6
b) If fuse still blows, replace POWER SUPPLY.
c) If fuse does not blow, check for shorts in wiring,
burned out solenoids, etc.
Section 6H - Game plays intermittently.
This usually indicates a power supply or CPU board
problem. Check the
+
5DVC and the unregulated
+
5VDC on the CPU board and on the power supply.
If the voltage is correct, attempt to run the CPU self
tests in the diagnostics. (See Section 5) If the CPU self
tests fail, remove the DRIVER BOARD and attempt
to run the CPU self tests again. If the diagnostics now
run, replace the DRIVER BOARD. Otherwise, replace
the CPU Board.
Section 6 I Game repeatedly comes on in diagnostic test
04, subtest 01.
This indicates that there has been either a battery
failure or a CPU board failure. Measure the voltage
across the batteries. If the voltage is below 3.0VDC,
replace the batteries with Power ON and make any
necessary game status changes if required. If the vol-
tage is above 3.0VDC, run the CPU Self Test diag-
nostics. If CMOS RAM test fails, replace the CPU
Board.
SECTION 7
INTERCONNECTION CHARTS
The following interconnection charts are used to identify •
the color and pin number of all the wires for all the com-
ponents and typical wiring sketches for each type of
circuit.
The following conventions are used throughout -
1.
1J 1 is connector J
1
on board 1.
3J6 is connector J6 on board 3.
2. J designations refer to the male part of plug.
P designations refer to the female part of plug.
3. The prefix numbers are as follows:
1. CPU Board
2. Driver Board
3. Power Supply Board
4. Master Display Board
5. Slave Display Board
6. Back Box Miscellaneous
7. Cabinet
8. Play field
9. Insert Box
Refer to Figures 6, 7, 8 and 9 for the lamps matrix, the
switch matrix, solenoid matrix and connector iden-
tification.