Midway Skins Game, Руководство по эксплуатации

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Troubleshooting - 4 Midway Games West Inc.
4. Using 2-volt AC setting on a digital voltmeter,
measure voltages at the speaker terminals. Any
reading here indicates that supply voltages are
unstable and may contain ripple or noise.
5. Place speaker in working game to verify operation.
•
Audio monaural
Poor connection
Verify wiring against Cabinet Wiring Diagram. Check
for shorted wires.
Controls Problems
Symptom Problem Suggested Solution
Joystick is out of
calibration
From Self-Test Menu, choose CONTROLS TEST.
Follow screen instructions to recalibrate joystick.
Faulty wiring
1. Ensure wiring connectors are firmly seated in
control panel and no wires are broken or pinched.
2. Repair or replace damaged cables. Reposition
wires as necessary to avoid cinching.
Poorly seated
potentiometer
1. Inspect joystick assembly. A potentiometer may not
be seated snugly.
2. Remove a spring clip to reveal potentiometer.
3. Try rotating potentiometer. If snug, it will not turn. If
it turns, push it inward while turning until you
correctly realign it and it seats tightly.
4. Replace clip and inspect other potentiometer.
Bad potentiometer
5. Turn AC power on. Check voltage at each
potentiometer. Put voltmeter leads on center tap
and ground. Leave joystick in default position.
Meter should read about +1.5V.
6. Use analog or bar graph digital voltmeter for this
test: Put voltmeter leads on wiper and ground.
Move joystick through its range. Check for smooth,
linear transition between .5V and 1.5V. If meter
jumps at any point, potentiometer is bad.
7. Replace a potentiometer that fails either test.
Bad inline power
fuse
1. Check voltages to CPU Board Assembly.
2. If +5VDC is absent, replace inline fuse on power
cable. Use identical type fuse and retest voltages.
•
Joystick non-
functional or
functions erratically
Faulty Pot Amp
chip
1. Test CPU Board Assembly in working machine.
2. If joystick is still bad, repair or replace.
•
Joystick slips,
seems loose. Poor
response.
Nylon spacer worn
by rotating bracket
1. Remove joystick assembly, turn upside down, and
check whether there is too much play in brackets
when stick moves.
2. Invert nylon spacer 180 degrees and replace.
3. If already inverted, replace with new spacer.