Midway Sportstation 39in Deluxe Operation Manual

							7-4
VGM Startup Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Power problem1. Inspect circuit boards under low-light
conditions. LEDs glow if processor circuits
receive voltage. Fan should be turning. These
indications prove presence of DC from power
supply. Still, voltages or signals may not be
normal.
2.  Turn on VGM power. Using 20-volt DC setting
on digital voltmeter, measure DC voltages at
power connector pins.
3.  Using 2-volt AC setting on digital voltmeter,
measure same DC voltages as above. Any
reading indicates ripple or noise. In that case,
service power supply.
Faulty wiringTurn off VGM power. Assure that wiring
harness connectors attach and fully seat onto
mating board connectors.
Improper jumper or
DIP switch settingsVerify that circuit board jumpers are set as
intended. Check DIP switch settings.
•
 VGM (video game machine)
appears non-functional.
•
  Currency acceptor price
indicator is illuminated.
Faulty circuit boardsRun power-up self-test sequence. Note errors
or failures during tests. Compare LEDs with
LED indicator status charts. Note
discrepancies.
CAUTION: 
Don’t remove or install any connector while power is turned on. Doing so
will damage circuit boards or hard disk drive, and void warranty.
A-21915
04-12655
A-22694 5795-15344-07 20-10493
01-14923A-22628-1H-22900.1
04-12404.3 5556-13956-00 A-22530
A-2191520-10516
5733-15139-00 11-1259
04-126525795-10397-09
Front View Of Coin Door  Interior View Of Electronics 
						

							7-5
VGM Startup Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Faulty coin
mechanism1.  Unlock and open coin door. Check each
currency acceptor to assure proper mounting.
Verify that each release latch is closed and
locked. Does mechanism accept and reject
currency correctly? Test mechanism with good
and bad coins.
2.  Inspect to see if external acceptor indicators
(Pricing, Flashing Arrows, etc.) are lit.
3.  Verify that each acceptor operates properly by
placing it in working VGM. Replace bad parts.
Faulty switches1.  Enter Menu System by pressing and holding
TEST MODE switch inside coin door. From Main
Menu, choose CONTROLS TEST. Use tests to
confirm operation of each switch.
2.  Assure that no loose parts or wires are caught in
switch contacts.
3.  Check for continuity in each suspect switch
connection (Common to Normally Open or
Common to Normally Closed).
4.  Replace faulty switches (bent levers, broken
actuators, etc.).
•
 VGM (video game machine)
doesn’t start.
•
  VGM accepts currency or
tokens.
•
  Audio and video are present.
Faulty wiring1.  Assure that no wires are caught in hinges,
latches or switch contacts.
2.  Check wiring continuity from circuit board
connectors to acceptors.
Interior View of Coin Door and Cash Door 
						

							7-6
Audio Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Improper volume
setting1.  From Main Menu, choose VOLUME LEVEL.
Check that Attract Music is on (enabled). Verify
that all volume levels are set well above zero.
2.  If necessary, change levels to make VGM
audible.•
 No audio
•
  Video is present
•
 VGM (video game machine)
appears to operate normally
Faulty SIO Board1.  From Main Menu, enter Diagnostics Menu.
Select SOUND SUBSYSTEM TEST. Test
checks entire sound system.
2.  Run power-up self-test sequence. Note errors
that VGM finds during tests. Compare Sound I/O
Board (SIO) LEDs with LED indicator status
charts. Note discrepancies.
3.  Verify proper operation of SIO Board by placing it
in working VGM.
4.  If board is faulty, replace it.
Faulty wiring1.  Check that cabinet wiring is correct for this VGM.
2.  Verify that cabinet wiring provides separate wires
(not common return) for each speaker.
3.  Check connection of all cabinet ground wires.•
  Constant low hum from all
speakers.
Faulty power supplyUsing 2 Volt AC setting on digital voltmeter,
measure voltages at speaker terminals. Any
reading indicates ripple or noise. In that case,
service power supply.
Faulty or improper
speaker1.  Turn off VGM power. Remove grilles and check
speakers. Assure that speakers are full range
(100 to 10,000 Hz response) and rated for at
least 20 watts. Woofers must be rated for at least
40 watts.
2.  Verify proper speaker operation by connecting
speaker in question to working VGM.
3.  If speaker is faulty, replace it.
•
  Audio is distorted, muffled or
has missing frequencies.
Faulty wiringMultiple-speaker installations: Check for
reversed wires at one speaker. Weak low
frequencies and thin or hollow sound quality is
symptom of incorrectly phased speakers. Sound
tests may not detect this condition, but you can
hear it during VGM operation.
Faulty speaker1.  From Main Menu, choose SOUND TEST.
Recheck speakers with audio signals provided
by test.
2.  Verify proper speaker operation by connecting
speaker in question to working VGM.
3.  If speaker is faulty, replace it.
Faulty circuit board1.  From Main Menu, enter Diagnostics Menu.
Select SOUND SUBSYSTEM TEST. Test
checks entire sound system.
2.  Run power-up self-test sequence. Note errors
that VGM finds during tests. Compare circuit
board LEDs with LED indicator status charts.
Note discrepancies.
3.  Verify SIO Board operation by connecting board
to working VGM.
4.  If board is faulty, replace it.
•
  Dead sound channel
Faulty wiringVerify that cabinet wiring is correct. Assure that
all speakers connect to audio wires. Check for
broken or shorted wires. 
						

							7-7
Joystick Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Faulty switchEnter game Menu System by pressing and
holding TEST MODE switch inside coin door.
From Diagnostics Menu, choose SWITCH TEST.
Operate joystick in question. Check for proper
readings of up, down, left and right.
Faulty switch wiring1.  Check for wires caught in door hinges, latches or
switch contacts.
2.  Verify that harness connectors are attached and
fully seated.
3.  Assure that joystick switches connector properly
to control input wires.
4.  Check joystick cable ground connections.
5.  Check that cabinet wiring is correct for this VGM
(video game machine).
Faulty mechanical
parts1.  Inspect joystick for: Missing, loose or damaged
parts, torn rubber T-band, etc.
2.  Replace bad parts.
Dirty optosClean dust out of optos with swab and cleaner.
Don’t apply cleaner directly into opto. Never use
solvents!
Faulty joystick fuseCheck fuses on I-40 Joystick Interface Board
inside player control panel. Each joystick has its
own fuse.
Faulty joystick
electronics1.  If joystick fuses are okay, install joystick in
working VGM (video game machine) and retest
it.
2.  If joystick still doesn’t work, replace it.
•
  Players complain that
joystick operates erratically
or unreliably
•
  Game starts normally
Faulty I-40 Joystick
Interface Board1.  If joystick works in second VGM, I-40 Joystick
Interface Board may be bad.
2.  Replace board and retest joystick.
Joystick Parts 
						

							7-8
Video Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problemVerify connection of AC Power to video
monitor. Inspect CRT neck in dim light.
Glowing filament near CRT base proves that
some monitor circuits receive power. Still,
voltages or signals may not be normal.
Faulty wiring1.  Turn off VGM power. Verify that video signal
and Remote Adjustment Board connectors
seat properly on Video Monitor Board.
2.  Assure that video cables connect to circuit
boards.
3.  Assure that no wires are caught on chassis or
mounting brackets.
Improper monitor
adjustmentsCheck that BRIGHTNESS (intensity) and
CONTRAST are set above their minimum
levels.
•
  Monitor appears non-
functional
•
  Audio is present
•
 VGM (video game machine)
controls operate normally
Faulty monitor
circuitry1.  Examine AC line fuse on Video Monitor Board.
If fuse is faulty, replace it with identical fuse.
2.  If fuse is good: Verify that video monitor
operates correctly by placing it in working
VGM.
3.  If monitor is bad: Check monitor power supply.
4.  If power supply is good: Check monitor
horizontal output transistor and related
circuitry.
WARNING: HIGH VOLTAGE. 
VGM monitors 
generate and store potentially lethal
high voltages. 
Avoid touching any part of the monitor until power has been off for
some time. A picture tube can maintain a hazardous charge for up to several days.
Only qualified technicians should service monitors. Turn off the power, unplug the
VGM and discharge the CRT before attempting service. Even properly discharged
tubes can revert to a highly charged state, without reapplication of power.
WARNING: 
In normal operation, the monitor doesn’t require isolation from AC line
voltage. During bench servicing, you may need to operate the monitor outside the
cabinet. If you do, isolate the monitor from line voltage with an isolation transformer.
CAUTION: 
Don’t operate the monitor without the Remote Adjustment Board. 
						

							7-9
Typical Cutaway Rear View 
						

							7-10
Video Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
Improper components1.  Verify that hard disk drive is correct for this VGM
(video game machine). Label on drive records
manufacturer name, assembly number and
program version.
2.  Verify that circuit boards are correct for this
VGM. Label on each board records manufacturer
name, assembly number and hardware version.
3.  Verify that ROM instruction set is correct for this
VGM. VGM set only has one ROM. Label on
ROM records assembly number and software
version.
•
  Game screens don’t appear
•
 No audio
•
  Power-up self-test runs
Hard drive problems1.  Turn VGM on. Immediately look under hard
drive. Hard Drive Activity LED flashes if drive is
operating properly.
2.  Allow VGM to load normally. Note and record
any error messages that occur during self-test.
3.  Remove hard drive and install it in working VGM.
If symptom recurs there, hard drive is faulty.
Replace it.
•
  Blotches of color appear on
screenPicture tube aperture
mask is magnetizedRemove diskettes from room. Demagnetize
monitor with external degaussing coil. Take care
not to magnetize neighboring VGMs. Monitor
may be on or off for this procedure.
•
  White areas in center of
screen appear tinged with
color
•
  Object edges have fringe of
one or more colorsPicture tube purity or
static convergence is
out of alignment1.  Turn on VGM (video game machine).
2.  Press and hold TEST MODE to enter Menu
System. At Main Menu, select Monitor Tests
Menu. Run through Crosshatch, Red, Green and
Blue screens to find clearest display of problem.
3.  Display screen with greatest problem.
4.  Display Crosshatch Screen. Locate purity and
static convergence ring magnets on back of
monitor neck. Watch screen in mirror. Adjust
magnets to minimize problem. Follow
instructions from monitor manufacturer.
5. Display Crosshatch Screen. Touch up
adjustments while watching screen in mirror.
•
  Background of Attract Mode
screens seems out of sync
•
  Words on screen read OKSomeone set DIP
switch for resolution
lower than VGA1.  VGM only outputs VGA video. Press and hold
TEST MODE to enter Menu System. At Main
Menu, select DIP Switch Test Menu.
2.  Locate DIP switch bank U12 on the Sound I/O
Board.
3.  Turn off switch 2.
4.  Reenter Attract Mode and check screens.
CAUTION: 
Don’t operate the monitor without its Remote Adjustment Board.
WARNING: HANDLE FLUORESCENT TUBE AND CRT WITH CARE. 
If you drop a
fluorescent tube or CRT and it breaks, it will implode! Shattered glass can fly eight feet
or more from the implosion. 
						

							7-11
Video Troubleshooting Table, continued
SYMPTOM CAUSE REQUIRED ACTION
•
  White areas at screen edges
appear tinged with color
•
  Dots at screen edges appear
oval or cylindricalPicture tube dynamic
convergence is out of
alignmentHave service bureau dynamically reconverge
monitor. This procedure requires removing and
repositioning yoke. Service bureau must follow
instructions from monitor manufacturer.
Faulty wiring1. Check connectors and cables for wiring
continuity. Video cables connect graphics card to
circuit boards, and then to video monitor.
2.  Assure connection of all cabinet ground wires,
especially at video monitor chassis.
Faulty monitor
circuitry1.  Check video monitor operation by connecting it
to working VGM (video game machine).
2.  Assure that video monitor is correct type for this
VGM. Video monitors with wrong resolution can’t
lock sync.
Improper sync signals1.  Check to see if Video Board puts out type of
sync that your monitor requires.
2.  Verify that jumpers are set correctly for monitor.
3.  If necessary, add or remove video sync jumper
at Sound I/O Board jumper block J10. With no
pins connected (or pins 2 and 3 connected),
board outputs positive sync. With pins 1 and 2
connected, board outputs negative sync.
•
  Video tears or rolls, or has
black bar down middle of
screen
Electromagnetic fieldsMove cabinet far away from machines,
appliances, or competitors’ VGMs.
Faulty wiringCheck connectors and cables for wiring
continuity from circuit boards to video monitor.•
 Missing colors
Faulty monitor color
drive circuitryVerify that video monitor operates correctly by
connecting it to working VGM.
•
  One color is dimmer or
brighter than others
•
  Whites appear tinted
everywhere on screenMaladjusted color
bias pots1.  Turn on VGM (video game machine).
2.  Enter Monitor Tests Menu.
3.  Watch Color Bars screen in mirror.
4.  Adjust three bias pots for best colors. (Most
monitor neck boards include these pots.)
5.  Also check White Screen. Touch up controls.
6.  If whites still seem tinted, have service bureau
rejuvenate picture tube.
•
  Picture is dim or fadedMaladjusted
BRIGHTNESS pot or
subnormal picture
tube emission1.  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.
2.  If pots have no effect, have service bureau
rejuvenate picture tube.
•
  Picture is too narrowMaladjusted WIDTH
potEnter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting WIDTH pot for best
picture. You’ll find this pot on Monitor Remote
Control Board, behind coin door.
•
  Picture is too shortMaladjusted HEIGHT
pot or damaged
vertical circuit1.  Enter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting HEIGHT pot for best
picture. You’ll find this pot on Monitor Remote
Control Board, behind coin door.
2.  If pot has no effect, service vertical output circuit.
•
  Picture seems shifted to one
sideMaladjusted
HORIZONTAL
POSITION potEnter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting HORIZONTAL POSITION
pot for best picture. You’ll find this pot on Monitor
Remote Control Board, behind coin door. 
						

							7-12
•
 Keystone-shaped pictureShorted turns in yoke1.  Substitute working yoke.
2.  Have service bureau converge monitor.
3. Retest monitor. 
						

							7-13
Software Update Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
You skipped steps or
performed them out
of sequence.Return update components to kit, reinstall
original parts in cabinet, and try process again.•
  Update didn’t work
•
 
After update procedure,
screen reports lower than
latest versionInstallation error may
have damaged
device.1.  Inspect for bent or broken pins.
2.  If you have another kit, try it.
3.  Ask your distributor to check your floppy disk.
Mismatched boot
update version and
hard drive.Once you’ve updated disk drive, CPU
instructions must be at correct version to make
use of new data stored on disk. Be certain that
boot ROM device resides in proper socket.•
  No Attract Mode screens
•
  Board indicators illuminate,
but screen is completely
blank
You may have
installed devices in
wrong sockets.1.  Install disk ROM. Only use upgrade socket for
hard disk drive updates. During game play,
upgrade socket must be empty.
2.  Load ROM contents onto drive.
3.  Remove ROM from game.
NOTICE: 
Someday, software updates for your VGM (video game machine) might
become available. These upgrades may improve your VGM’s performance or add new
VGM features. Such upgrades tend to appear sometime after the factory first releases
the VGM. Contact your distributor for information about updates.