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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 appropriate
plug.
1. 3FI
(+
100 VDC, -100 VDC)
disconnect 3P5
2. 3F2
(+
28 VDC) disconnect 3P4, 3P3
3.3F3
(+
18 VDC) disconnect 3P4
4. 3F4 (6.3 VAC) disconnect 3P3
5.3F5 (+ 5 VDC) 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
+
5 VDC and the unregulated
+
5
VDC 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 61 - 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 3.0 VDC,
replace the batteries with POWER ON and make any
necessary game status changes if required. If the
voltage is above 3.0 VDC, run the CPU Self Test diag-
nostics. If CMOS RAM test fails, replace the CPU
Board.
Section 6J - Place Diagnostics in Test 02
SOUND TROUBLESHOOTING CHART
1 SOUND
Never Sounds
1. Check Solenoid Chart to verify number correct and in
use.
2. Broken wire to lOB connector.
3. Replace PROM on Sound Board.
4. Open driver on Driver Board - Replace Driver on
Driver Board.
5. Open buffer on Sound Board - replace buffer on
Sound Board.
2 OR MORE SOUNDS
Never Sound
1. Replace PROM on Sound Board.
2. Replace Sound Board.
24
ALL SOUNDS
Never Sound
1. Check fuses IOFI on Sound Board and 7F2 adjacent to
Sound Board.
2. Check connectors 1011, 1012 and lOB
3. Check volume control position
4. Check amplifier portion of Sound Board.
5. Replace PROM on Sound Board.
6. Replace Sound Board.
SECTION 7
INTERCONNECTION CHARTS
The following interconnection charts are used ~ identify
the color and pin number of all the wires for all the
components and typical wiring sketches for each type of
circuit. The following conventions are used throughout -
1. 111 is connector 11 on board 1.
316 is connector 16 on board 3.
2. 1 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.
Playfield
9.
Insert Box
10. Sound Board
Refer to Figures 8, 9, 10, and 11 for the lamps matrix,
switclnmatrix, solenoid matrix, and connector
identification; respectively.