Midway Gauntlet Dark Legacy, Руководство по эксплуатации

Страница: 60 / 61

Gauntlet: Dark Legacy 61
Chapter 6 Troubleshooting
Vi d e o P r o b l e m s
Symptom Problem Suggested Solution
• Monitor appears non-
functional.
• Audio present
• Controls operate nor-
mally.
Poor signal 1. Verify AC power is connected to video monitor.
2. Inspect neck of CRT under low light level conditions. If
there is voltage in filament circuits, you will see a glow
near the CRT base. This indicates monitor circuits are
receiving power, not that voltages or signals are proper.
3. Turn AC power off. Verify video signal and remote
adjustment board connectors are fully seated on video
monitor board assembly. Check other monitor connec-
tions in the same way.
4. Examine AC line fuse on video monitor. If faulty, replace
with fuse of proper voltage and current rating.
5. Ensure no loose parts or wires are caught on chassis or
mounting brackets.
Bad settings Ensure brightness and contrast are not at minimum levels.
• Power-up self test runs.
• Game does not appear.
• No audio. Error message Record error messages. Press TEST switch to enter menu
system. From SELECT TESTS menu, choose DISK
TESTS. These tests verify hard disk drive functions.
Faulty hard disk
drive 1. Turn off AC power. Unlock and open front door. Ensure
hard disk cable connector is fully seated on CPU Board.
Ensure all hard drive mounting screws are installed.
2. Ensure hard disk, ROM set and CPU Board Assembly are
correct part for game. Each component is labeled with the
assembly number and software or hardware version.
Poor voltage 1. Turn AC power on. Use 20V DC setting on digital volt-
meter to measure voltages at power connector pins. Ver-
ify +5V source.
2. Using 2V AC setting on digital voltmeter, measure same
DC voltages as above. A reading indicates that supply
voltages are unstable and may contain ripple or noise.
3. Compare LED states with indicator charts.
• Monitor fails to lock
onto signal and provide
stable picture.
• Colors missing, etc.
Poor sync 1. Check connectors and cables for wiring continuity from
CPU Board Assembly to monitor.
2. Verify jumpers are set correctly for monitor.
3. Ensure monitor is correct for game. Incorrect resolution
results in horizontal tearing or complete loss of sync.
4. Place monitor in working machine to verify operation.
• Game operates normally.
• Picture wavers or rolls,
has dark bars, uneven
colors, etc.
Faulty wiring 1. Check connectors and cables for wiring continuity from
CPU Board Assembly to monitor.
2. Ensure all cabinet ground wires are connected, especially
at monitor chassis.
3. Place monitor in good machine to verify operation.
Interference from
other equipment Move cabinet away from machines, appliances, other
games, etc. Very strong electrical or magnetic fields are
emitted from some equipment when operating normally.
WARNING: Do not operate monitor without Remote Adjustment Board.