Midway 40272, Game Operations Manual

Page: 93 / 93

Audio Troubleshooting Table
SYMPTOM CAUSE
No audio
.
Video is present
.
Video Game Machine
(VGM) appears to operate
normally
Audio is distorted, muffled
or has missing
frequencies.
volume
Faulty wiring
Faulty or obstructed
s p e a k e r
Faulty Audio Board
Power Problems
Faulty or Improper
s p e a k e r
Faulty
Improper Setting
REQUIRED ACTION
Press and hold TEST MODE cc
door to enter Menu System. Select
from Main Menu
Attract M
USIC
on (enabled)
levels are set well above zero. If
change levels to make game audible
Turn off power. Assure
connectors attach and fully seat
board connectors. Verify harness
CPU Board. Check audio cable
same way.
Remove grilles and inspect spearers
speaker cones, terminals,
ard
magnets of loose parts or
p r o p e r o f
placing in a working VGM.
Use DC setting on
measure DC voltages present a:
connector pins. arc
sources. Refer to Cabinet
specific and v o l t a g e
Turn off power. Remove grilles
speakers. that speakers are
(100 to 10,000 Hz response) and
least 20 watts. Woofers must be rated
40 watts.
Verify proper speaker operation
speaker a working VGM
Multiple-speaker Installations:
reversed wires at one speaker.
and or hollow sound
symptom of incorrectly phased
tests may not detect condition,
hear it
Press and hold TEST MODE
door to enter Menu System. Select
TEST from Menu. Increase
as required, test
circuit functions.
Troubleshooting 16