Midway Cruis'n Exotica, Руководство по эксплуатации

Страница: 102 / 109

Troubleshooting - 12
Video Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problem Verify connection of AC Power to video monitor.
Inspect neck of CRT in dim light. Glowing
filament near CRT base confirms monitor circuits
receive power. However, voltages or signals may
not be normal
.
Faulty wiring 1. Turn off game power. Verify that video signal and
Remote Adjustment Board connectors seat
properly on Video Monitor Board.
2. Assure that no wires are caught on chassis or
mounting brackets.
Improper monitor
adjustments Check BRIGHTNESS (intensity) and
CONTRAST are set above their minimum levels.
•
Monitor appears non-
functional
•
Audio is present
•
Video Game Machine (VGM)
controls operate normally
Faulty monitor
circuitry 1. Examine AC line fuse on Video Monitor Board. If
fuse is faulty, replace it with an identically rated
fuse.
2. If the fuse is good, verify video monitor operates
correctly by placing it in a working VGM.
3. If monitor is bad; Check monitor power supply.
4. If the power supply is good, Check monitor
horizontal output transistor and related circuitry.
Improper components 1. Verify circuit boards are correct for this game.
Labels on each board record manufacturers’
name, assembly number and hardware version.
2.
Verify ROM instruction set is correct for this
game. Game set includes more than one ROM.
Label on each ROM records assembly number
and software version.
Faulty Circuit Board 1. Allow game to load normally. Note and record
any error messages that occur during self-test.
2. Press and hold TEST MODE switch inside coin
door to enter Menu System. Select Diagnostic
Menu from the Main Menu. Then select CPU
BOARD TEST. Conduct this test to check
operation of critical components.
3. Turn off power. Inspect CPU Board to ensure
JAMMA cable connector is fully seated onto the
mating edge connector of the CPU. Check all
other cable connectors for correct alignment and
continuity.
4. Compare activity of LED’s on CPU with the CPU
Indicator Chart.
•
Graphic images from game
do not appear
•
No audio
•
Power-up self-test runs
Power Problems
1. Turn on Power. Use 20-volt DC setting on digital
voltmeter to measure DC voltages present at
Power connector pins. 5V source if it is
adjustable. Refer to Cabinet Wiring Diagram for
specific wiring information and voltage limits.
2. Use 2-Volt AC setting on digital voltmeter to
measure DC voltages at Power Connector pins.
Any reading indicates the supply voltages are
unstable and may contain ripple or noise.