VIDEO PROBLEMS
1.
Monitor appears non-functional, but audio is present and controls operate as expected.
A:
Unlock and open the rear door. Verify that A.C. Power is connected to the Video Monitor. Inspect
the neck of the CRT under low light level conditions.
A glow will be seen near the CRT base if
there is voltage in the filament circuits. This does not mean that other voltages or signals are as
they should be, but it does indicate that some of the monitor circuits are receiving power.
B: Turn OFF the game power. Verify that the Video Signal and the Remote Adjustment Board
connectors are fully seated on the Video Monitor Board Assembly. Check the other monitor
connectors in the same way.
C:
Examine the A.C. line fuse on the Video Monitor Board Assembly. If the fuse is faulty, replace it
with an identical fuse of the proper voltage and current rating.
D:
Ensure that no loose parts or wires are caught on the chassis or the mounting brackets.
E:
Check that the brightness (intensity) and contrast have not been set to their minimum levels.
F:
Verify that the Video Monitor is operating correctly by placing it in a known good unit.
2:
The power-up self-test will run, but the game does not appear. No audio is present.
A:
Note and record any error messages that occur during self-test. Open the coin door. Press and
hold the BEGIN TEST switch to enter the menu system. Select DIAGNOSTIC TESTS from the
Main menu. Once in the DIAGNOSTIC TEST menu, choose CPU BOARD TEST (refer to Section
One for additional details). Use this set of tests to check the operation of critical components.
B:
Turn OFF the game power. Unlock and remove the rear door. Inspect the CPU Board Assembly.
Ensure that the
cable connector is fully seated into the mating edge connector on the
CPU Board. Check the other cable connectors for correct alignment and continuity.
CAUTION:
DO NOT REMOVE OR INSTALL ANY CONNECTOR WHEN POWER IS TURNED ON.
THIS WILL DAMAGE THE CPU BOARD OR HARD DISK DRIVE AND VOID THE WARRANTY.
C: Verify that the ROM instruction set is correct for this game. There is more than one
ROM in a
game set. Each ROM circuit is labeled with the assembly number and the software version.
D: Verify that the CPU Board Assembly is correct for this game. Each CPU Board is marked with the
manufacturer name, assembly number and the hardware version.
E: Turn ON the game power. Using the 20 Volt D.C. setting on a digital voltmeter, measure D.C.
voltages present at the Power connector pins. Verify the
source if it is adjustable. Refer to
the Cabinet Wiring Diagram (Section Three) for specific wiring information and voltage limits.
F:
Using the 2 Volt
on a digital voltmeter, measure the same D.C. voltages as above.
Any reading indicates that the supply voltages are unstable and may contain ripple or noise.
Compare CPU Board Light Emitting Diode states with the CPU Indicator Chart (Section Three).
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