Midway Cruis'n Exotica, Operation Manual

Page: 104 / 109

Troubleshooting - 14
Video Troubleshooting,
continued
SYMPTOM CAUSE REQUIRED ACTION
•
White areas at screen edges
appear tinged with color
•
Dots at screen edges appear
ovoid or cylindrical
Picture tube dynamic
convergence is out of
alignment Have service bureau dynamically re-converge
monitor. This procedure requires removing and
repositioning yoke. Service bureau must follow
instructions from monitor manufacturer.
Faulty wiring
1. Check connectors and cables for wiring
continuity. Video cables connect circuit boards to
video monitor.
2. Assure connection of all cabinet ground wires,
especially at video monitor chassis.
Faulty monitor
circuitry
1. Verify video monitor operates correctly by
connecting it to working Video Game Machine
(VGM).
2. Assure video monitor is correct type for this
game. Video monitors with wrong resolution can’t
lock sync.
Improper sync signals
1. Check to see if Video Board puts out type of
sync that your monitor requires.
2.
Verify jumpers are set correctly for monitor.
•
Video images tear or roll, or
have black bar down middle
of screen
Electromagnetic fields
Move cabinet far away from machines,
appliances, or competitors’ video games.
Faulty wiring
Check connectors and cables for wiring
continuity from circuit boards to video monitor.
•
Missing colors
Faulty monitor color
drive circuitry Verify video monitor operates correctly by
connecting it to working Video Game Machine
(VGM).
•
One color is dimmer or
brighter than others
•
Whites appear tinted
everywhere on screen
Maladjusted color
bias pots
1. Turn on Video Game Machine (VGM).
2. From Diagnostic Menu select MONITOR TEST.
3. Watch Color Bars screen in mirror.
4. Adjust three bias pots for best colors. (Most
monitor neck boards include these pots.)
5. Check White Screen. Touch up controls.
6. If whites still seem tinted, have service bureau
rejuvenate picture tube.
•
Picture is dim or faded
Maladjusted
BRIGHTNESS pot or
subnormal picture
tube emission
1. From Diagnostic Menu select MONITOR TEST.
2. Watch Color Bars screen. Adjust BRIGHTNESS
and CONTRAST pots for greatest number of
grays. You’ll find these pots on Monitor Remote
Control Board, behind coin door.
3. If pots have no effect, have service bureau
rejuvenate picture tube.