Midway Sportstation 25in Conversion Kit Operation Manual

							Wiring          5-11
SOUND I/O BOARD ASSEMBLY A-23704 
						

							Wiring          5-12
SOUND I/O BOARD JUMPER POSITION TABLE *
Jumper Location Function Meaning Position State
Input Mode Pins 1 & 2

J1
(Note 1)Near U9 & Crystal Y3 I/O Connector P2
Output Mode Pins 2 & 3
Positive Sync Jumper Not
Installed
J2 Between U35 & U10 Video Sync
Negative Sync Pins 1 & 2
Input Mode Pins 1 & 2

J3
(Note 2)Near U15 I/O Connector P4
Output Mode Pins 2 & 3
J4 None None Not Used None
---
Input Mode Pins 1 & 2

J5
(Note 2)Between U15 &
Connector P2I/O Connector P4
Output Mode Pins 2 & 3
J6 None None Not Used None
---
J7 None None Not Used None
---
Input Mode Pins 1 & 2

J8
(Note 1)Between U9 &
Connector P4I/O Connector P2
Output Mode Pins 2 & 3
Notes
1.  Configure I/O port P2 by setting both jumpers J1 and J8 to input or output mode.
2.  Configure I/O port P4 by setting both jumpers J3 and J5 to input or output mode. 
						

							Wiring          5-13
SOUND I/O BOARD LED INDICATOR STATUS TABLE
LED Location Function Color State Meaning
Off --
On --LED1
(Note 1)Near U11 Not Used
(Remains Off)Green
Blinking --
Off Not in Use (No Game Linking)
LED2
(Note 2)Near U34 & Crystal
Y1Linking Connector
StatusGreen
On Link Continuity Good
Off* No Power
LED3
(Note 2)Near the JAMMA
Connector-5V Power Indicator Red
On* Normal Operation
Off No PowerLED4
(Note 2)Near U35 &
Connector P14+12V Power
IndicatorRed
On Normal Operation
Off No PowerLED5
(Note 2)Near Connector
P23+5V Power Indicator Red
On Normal Operation
Off Not in Use
LED6
(Note 2)Near U34 & Crystal
Y1CPU Linking Activity Red
On CPU Communicating with
Ethernet Controller
Off Not in Use (No Game Linking)
On Sending DataLED7
(Note 2)Near U34 & Crystal
Y1Linking Transmitting
DataRed
Blinking Normal Operation
Off No Sound Boot ROM
On Locked UpLED8
(Note 1)Near U14 & Crystal
Y1Audio Activity Yellow
Blinking Normal Operation
Off Not in Use (No Game Linking)LED9
(Note 2)Near U34 & Crystal
Y1Linking Receiving
DataYellow
On Receiving Data
Off --
On --LED10
(Note 1)Near U44 & Crystal
Y2 Not Used
(Remains On)Green
Blinking --
Off --
On --LED11
(Note 1)Near U44 & Crystal
Y2 Not Used
(Remains On)Red
Blinking --
Off --
On --LED12
(Note 1)Near U44 & Crystal
Y2 Not Used
(Remains On)Yellow
Blinking --
Off --
On --LED13
(Note 1)Near U44 & Crystal
Y2 Not Used
(Remains On)Yellow
Blinking --
Notes
1.  Software controls this LED. Indications are game and revision-specific. Changing the EPROMs on this board
may alter the function of this LED. Firmware damage may also cause new of different LED behavior.
2. Hardware controls
 this LED. Indications depend on hard-wired circuitry. A change in normal LED behavior may
indicate a circuit fault. Changing the EPROMs on this board shouldn’t alter the function of this LED. 
						

							Wiring          5-14
VIDEO BOARD INDICATOR AND SWITCH LOCATIONS
Note
This video board has no jumpers or LEDs. 
						

							Troubleshooting          6-1

	


	





	

	






	
C H A P T E R
S I X
TROUBLESHOOTING
NOTICE: 
The term VGM refers to the video game machine.
CAUTION: 
This VGM uses complex electronic components that are very sensitive to
static electricity. Observe the following precautions before handling VGM electronics.
Failure to do so may void your warranty and could damage electronic assemblies.
•
  Before servicing electronics, turn off AC power to the VGM. W ait for capacitors to discharge.
•
  Before touching or handling electronic assemblies, discharge static electricity on your body. To
discharge this static, begin by connecting the line cord to a grounded outlet. Don’t turn on the
VGM! Next, touch the safety ground stud of the power supply chassis.
•
  Store electronic assemblies in an anti-static area. Use anti-static bags to store or transport VGM
circuit boards. Transport the hard drive in its shipping container.
•
  Don’t remove or connect electronic assemblies when cabinet power is on. Otherwise, you’ll
damage electronic assemblies and void the VGM warranty.
•
  After you complete maintenance or service, replace ground wires, shields, safety covers, etc.
Install and tighten ground and mounting screws. 
						

							Troubleshooting          6-2
Coin Mechanism and Pricing Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Improper settings at
Pricing MenuFrom Coin Options Menu, choose PRICING
OPTIONS MENU. Verify that units and credits
are set correctly.
Incorrect pulse width
on bill validators1.  Consult bill validator manufacturer’s literature.
Adjust pulse width on validator to long setting.
2.  Retest validator operation.
Faulty wiring1.  Check that cabinet wiring is correct for this VGM.
2.  Assure that coin meter and coin switches
connect properly to control input wires.
• VGM (video game machine)
accepts currency or tokens,
but number of credits per
coin or bill is incorrect.
Faulty coin
mechanism1.  Verify that coin mechanism works correctly by
testing it in working VGM.
2.  If mechanism is bad, replace it.
Improper currency1.  Unlock and open cash door. Empty cash box.
Inspect revenue for counterfeit currency.
2.  Check vault. Remove any items that block path
from mechanism.
Faulty coin
mechanism1.  Unlock and open coin door. Check each
mechanism for proper mounting.
2. Remove mechanism.
3.  Clear currency path.
4.  Reinstall mechanism and latch it.
5.  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 coin switches.
• VGM won’t accept currency
or tokens.
• VGM won’t start.
•  Audio and video are present.
Tilted coin
mechanism or VGM1.  Verify that mechanism is level after doors close.
2.  Repair or replace coin door if it is bent or
damaged.
3.  If necessary, adjust cabinet leg levelers to keep
mechanisms vertical.
Burned-out bulb 1.  Burned-out bulbs may appear white or darkened.
Check continuity with DVM.
2.  Replace burned-out bulb with same type.•  Coin indicators don’t light
Open fuse circuit 1.  Check fuse continuity with DVM.
2.  If fuse is blown, replace fuse with same type.
3.  If fuse isn’t blown, check wiring.
CAUTION: 
Don’t remove or install any connector when power is turned on. Installation
under power will damage the circuit boards or hard disk drive and void the warranty.
Typical Coin Mechanism Mounting 
						

							Troubleshooting          6-3
VGM Startup Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
Power problem1.  Check that VGM power switch is on.2. Inspect electronics to see if fans are turning. If
not: Is power supply connected to its power
cable? Is power supply turned on?
3.  Plug VGM into AC power outlet. Verify presence
of AC line voltage.
Improper line voltage
switch settingTurn off VGM power. Unplug AC line cord. Check
line voltage switch. If necessary, set it to agree
with local AC line voltage. Retest VGM.
Open fuse1.  Turn off VGM power. Examine AC fuse on power
supply.
2.  Examine DC fuses inside coin door vault.
3.  Replace faulty fuses with identically rated parts.
4.  Turn on VGM power. If fuse opens again, check
DC wiring harness and connectors.
Faulty wiring1.  Remove line cord. Test line cord, power plug,
and IEC connector for breaks or damage. Verify
continuity of each wire in cord. Install cord at
power chassis. Press connector firmly to seat it.
2.  Check other cables in same manner.
3.  Assure that cabinet wiring harness connectors
fully seat in corresponding power supply and
board connectors.
4.  Inspect wiring for breaks or damage.
• VGM (video game machine)
doesn’t start.
•  VGM appears completely
non-functional.
• No audio
• No illumination
•  No video display
Faulty circuit boards1.  Turn off power for one minute and turn VGM on
again. Power On Self-Test checks electronics.
2.  Replace faulty parts and rerun self-test.
Typical Location of Power Supply and Line Cord 
						

							Troubleshooting          6-4
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 boards1.  Run power-up self-test sequence. Note errors or
failures during tests. Compare LEDs with LED
indicator status charts. Note discrepancies.
2.  Replace faulty PC boards and rerun self-test.
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.
Front View Of Coin Door  Interior View Of Electronics 
						

							Troubleshooting          6-5
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.
3.  Repair faulty wiring.
Interior View of Coin Door and Cash Door 
						

							Troubleshooting          6-6
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 normallyFaulty 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.
4.  Repair faulty wiring.•  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) and rated for at least 20 W .
W oofers must be rated for at least 40 W .
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 wiring1. Multiple-speaker installations: Check for
reversed wires at one speaker. W eak 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.
2.  Repair faulty wiring.
Faulty speaker1.  From Main Menu, choose SOUND TEST.
Recheck speakers with audio signals in 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 wiring1.  Verify that cabinet wiring is correct. Assure that
all speakers connect to audio wires. Check for
broken or shorted wires.
2.  Repair faulty wiring.