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Section 6D - Place Diagnostics in Display Digits Test
MASTER DISPLAY TROUBLESHOOTING CHART
NO DISPLAY
1. Check -100 VDC,
+
100 VDC
&
fuse
3FI on Power Supply.
2. Check connectors 3J5, 417,
4J5, lJ3, lJ5, lJ6, lJ7
3. Check for
+
100 VDC and -100 VDC
on connector 417 - replace
Power Supply Board if
voltage incorrect
4. Replace Master Display Board.
INCORRECT DISPLAY
1. Check
+
100 VDC, -100 VDC
at 417
2. Check for broken or shorted wires
on 4J5, 4J6, lJ5, lJ6, 117
3. Replace Master Display Board
Section 6E - Place Diagnostics in Display Digits Test
PLA YER DISPLAY TROUBLESHOOTING CHART
I PLAYER DISPLAY
INCORRECT
IOFF
I. Check correct location of
connector from Master
Display Board.
2. Replace Player Display - if
still incorrect, replace
Master Display Board.
2-4 PLAYER DISPLAYS INCORRECT
IOFF
I. Check correct location of connectors
from Master Display Board
2. Check voltage
+
100 VDC and -100 VDC
on connector 417
3. If voltages are correct - replace
Master Display Board.
USE EXTREME CAUTION WHEN MEASURING HIGH VOLTAGES!!!
Section 6F - Game Operation Troubleshooting
Put game in game over mode. Manually play game to
verify problem. Go to diagnostic mode and read out
functions by stepping through test 04. Review the
game adjustments to verify that they are what is
desired. Review game operation (Section 2).
Section 6G ~Troubleshooting an inoperative machine or
a machine that blows fuses.
Machine Inoperative
I. Remove plug from wall outlet and measure wall
voltage.
2. With machine unplugged, check the line fuse, line
cord, and ON/OFF switch with an Ohmmeter for con-
tinuity.
3. Check for any loose connections on line filter,
ONI
OFF switch.
4. Check that power connector to transformer is securely
connected.
5. Check all fuses on power supply board.
6. Plug machine in, turn on and check voltage on power
supply board fuses.
Machine Blows Fuse
1. Wall fuse or circuit breaker blows -
a. [>isconnect wall plug.
b. Disconnect connector from line filter to trans-
former.
c. Check line cord with Ohmmeter for shorts.
d. Check varistor and line filter for shorts.
e. Plug cord in wall and see if wall fuse still blows - if
yes, disconnect whatever else is on same wall plug
circuit and recheck items c and d above.
2.
Machine fuse blows -
a. Check for correct fuse rating.
b. Check varistor, line filter, line cord for shorts.
c. Disconnect connector from line filter to transformer
and try another fuse.
.d. If fuse still blows, do item a, b, c again.
e. If fuse does not blow, disconnect 3PI and 3P2 plugs
from the power supply board and reconnect plug
from line filter to transformer.
f. If fuse blows, check transformer and both lamps and
solenoid rectifiers for shorts.
g. If fuse does not blow, plug in 3P2 and 3PI then try
again. If fuse now blows, disconnect 3P3, 3P4, 3P5,
3P6, and try another fuse. If fuse still blows replace
POWER SUPPLY.
h. If fuse doesn't blow, hook up 3P3, 3P4, 3P5, and
3P6 one at a time. If fuse blows when anyone is
plugged, look for burned out solenoid, dead shorts,
etc.
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