Midway Hydro Thunder 25in Upright Service Manual

							Wiring5-6
NETWORK INTERFACE CARD ASSEMBLY
20-10550
NETWORK INTERFACE LED INDICATOR STATUS CHART
DESIGNATIONLOCATIONFUNCTIONCOLORSTATEMEANING
LED 1
(LNK)
LEFT CENTER
UNDER JACK
LINK VERIFY
INDICATOR
GREENOFFNOT IN USE
(NO GAME LINK)
ONNORMAL
OPERATION
BLINKINGLINK FAULT
(NOTE 1)
LED 2
(ACT)
RIGHT CENTER
UNDER JACK
ACTIVITY
INDICATOR
GREENOFFNOT IN USE
(NO DATA)
ONRECEIVING DATA
(NOTE 2)
BLINKINGNORMAL
OPERATION
NOTES:
1.Intermittent cable or hub problems may cause blinking.  Must be continuous at all times when linked.
2.Blinks as data packets are exchanged.  May appear almost continuous during heavy network activity. 
						

							Wiring5-7
VIDEO GRAPHICS CARD ASSEMBLY
20-10551
VIDEO GRAPHICS CONNECTOR AND JUMPER STATUS CHART
DESIGNATIONLOCATIONFUNCTIONMEANINGSETTINGDEFAULT
J1LEFT CENTERVIDEOGRAPHICOPEN
(DB-15 ONSIGNALINFORMATION1-15„
(NOTE 1)BRACKET)OUTPUTTO INTERFACE
J2-J7NONE---NOT USEDOPEN„
(NOTE 2)
JP2NONE---NOT USEDOPEN„
(NOTE 2)
NOTES:
1.Connects to Interface Board Assembly through shielded cable.  Does not connect directly to monitor.
2.Manufacturer option connectors and jumpers.  Not required for this game. 
						

							Wiring5-8
AUDIO AMPLIFIER BOARD ASSEMBLY
04-12529.1
AUDIO AMPLIFIER LED INDICATOR STATUS CHART
DESIGNATIONLOCATIONFUNCTIONCOLORSTATEMEANING
LED 1
(CR1)
UPPER CENTER
NEAR C3
FAULT
INDICATOR
REDOFFNORMAL
OPERATION
ONLOCKED UP
(NOTE 1)
BLINKINGOVERLOAD
(NOTE 2)
LED 2
(CR2)
LOW ER CENTER
NEAR U2 & U6
FAULT
INDICATOR
REDOFFNORMAL
OPERATION
ONLOCKED UP
(NOTE 1)
BLINKINGOVERLOAD
(NOTE 2)
NOTES:
1.Output protection circuit has been activated.  Clear fault and remove power to attempt a circuit reset.
2.Intermittent audio overload or overheating may cause blinking.  LED should flash only during start up. 
						

							Wiring5-9
DIEGO INTERFACE BOARD ASSEMBLY
04-12522.4
DIEGO INTERFACE BOARD SWITCHES
DESIGNATIONLOCATIONFUNCTIONPOSITIONSSTATEMEANING
S1-3RIGHT CENTER
NEAR JP7 & JP8
GAME
MODES
2OFF*NORMAL
OPERATION
ONFIXED IN
TEST MODE
S1-4RIGHT CENTER
NEAR JP7 & JP8
CABINET
SIZE
2OFFSTANDARD
25” CABINET
ON*39” CABINET
S1-8RIGHT CENTER
NEAR JP7 & JP8
RESET
MODES
2OFFW ATCHDOG
DISABLED
ON*W ATCHDOG
ENABLED
NOTES:
1. Use S1-3 only during testing or troubleshooting.  The game will not start if this switch is left ON.
2. Use S1-4 to set game type.  The speakers and leader lights will not work properly if set incorrectly.
3. Use S1-8 only during testing or troubleshooting.  The game may lock up or freeze if this is disabled.
4. S1-1, -2, -5, -6, and -7 have no assigned function.  Leave these switches in their OFF positions. 
						

							Wiring5-10
DIEGO INTERFACE BOARD LED INDICATOR STATUS CHART
DESIGNATIONLOCATIONFUNCTIONCOLORSTATEMEANING
LED 1
(D1)
MIDDLE CENTER
NEAR JP12 & U10
INDICATORGREENOFFNOT IN USE
ONLOCKED UP
(NOTE 1)
BLINKINGNORMAL
OPERATION
LED 2
(D2)
MIDDLE CENTER
NEAR JP12 & U10
INDICATORREDOFFNOT IN USE
ONLOCKED UP
(NOTE 1)
BLINKINGNORMAL
OPERATION
LED 3
(D3)
MIDDLE CENTER
NEAR JP12 & U10
INDICATORGREENOFFNOT IN USE
ONLOCKED UP
(NOTE 2)
BLINKINGNORMAL
OPERATION
LED 4
(D4)
MIDDLE CENTER
NEAR JP12 & U10
INDICATORREDOFFNOT IN USE
ONLOCKED UP
(NOTE 2)
BLINKINGNORMAL
OPERATION
LED 5
(D5)
UPPER LEFT
NEAR JP13 & L37
POW ER
INDICATOR
REDOFFNO
POW ER
ONNORMAL
OPERATION
BLINKINGPOW ER FAULT
(NOTE 3)
NOTES:
1.LED 1 and LED 2 are active on all versions of this board.  LEDs may flash together during game start
up.  If these LEDs are always ON, there may be a fault that has caused the game freeze or lock up.
2.LED 3 and LED 4 are active on some versions of this board.  May flash together during game start up.
If these LEDs are always ON, there may be a fault that has caused the game to freeze or lock up.
3.LED 5 monitors a regulated power supply voltage source.  Must be on continuously at all times.  Flash
or blinking indicates an intermittent connection, a power problem, a circuit fault, etc. 
						

							Wiring5-11
DIEGO INTERFACE CONNECTOR AND JUMPER STATUS CHART
DESIGNATIONLOCATIONFUNCTIONMEANINGSETTINGDEFAULT
J1 & JP1UPPER RIGHTVIDEOSIGNALS FROMOPEN
BETW EENINPUTCOMPUTER VIDEOJ1 ALL„
(NOTE 1)JP2 AND JP16SIGNALSGRAPHICS CARDJP1 ALL
J2 & J3LOW ER CENTERSERIALNOT USED IN THISOPEN„
BETW EENCOMMGAME (NO
(NOTE 2)JP7 & JP10SIGNALSUSB COMM)
JP2UPPER RIGHTVIDEOSIGNALS TOOPEN
BETW EENOUTPUTGAME VIDEOJP2 ALL„
J1 & JP6SIGNALSMONITOR
JP3UPPER RIGHTBLUEMATCHESOPEN„
BETW EENVIDEODRIVE LEVEL1 & 2
(NOTE 3)JP1 & JP6LEVELTO MONITOR2 & 3
JP4UPPER RIGHTGREENMATCHESOPEN„
BETW EENVIDEODRIVE LEVEL1 & 2
(NOTE 3)JP1 & JP6LEVELTO MONITOR2 & 3
JP5UPPER RIGHTREDMATCHESOPEN„
BETW EENVIDEODRIVE LEVEL1 & 2
(NOTE 3)JP1 & JP6LEVELTO MONITOR2 & 3
JP6UPPER RIGHTVIDEOLOCKS VIDEOOPEN„
BETW EENSYNCMONITOR TO1 & 2
(NOTE 4)L7 & U1POLARITYSYNC SIGNAL2 & 3
JP7LOW ER RIGHTPLAYERSIGNALS FROMOPEN
NEARINPUTSW ITCHES ANDJP7 ALL„
J3 & JP8SIGNALSSTEERING W HEEL
JP8LOW ER RIGHTOPERATORSIGNALS FROMOPEN
NEARINPUTCURRENCY ANDJP8 ALL„
JP7 & S1SIGNALSTEST SW ITCHES
JP9CENTER LEFTWHEELSTEERING MOTOROPEN
NEARDRIVERFEEDBACK ANDJP9 ALL„
JP11 & U5SIGNALSLEADER LIGHTS
JP10LOW ER LEFTCOININDIVIDUALOPEN
BETW EENOUTPUTCOIN METERJP10 ALL„
J2 & P1SIGNALSDRIVE CIRCUITS
JP11CENTER LEFTGAMEW ATCHDOGOPEN
BETW EENRESETTIMERJP11 ALL„
C134 & JP9SIGNALCIRCUIT
JP12CENTER RIGHTBOARDCONNECTOR USEDOPEN„
NEARTESTFOR CIRCUITJP12 ALL
S1 & U8SIGNALSDEVELOPMENT
JP15 & P1LOW ER RIGHTSERIALDATA EXCHANGEOPEN
NEARCOMMTO COMPUTERJP15
(NOTE 1)JP10 & U7SIGNALSCIRCUITSP1„
NOTES:
1. Connectors wired in parallel.  Use based on type of interconnect cable connector.
2. Alternate forms of communications.  Not required for this game.
3. Jumper not required for production video monitors.  Install for early production Neotec or other units.
4. Jumper factory set for production video monitors.  Change for older positive sync video monitors. 
						

							Wiring5-12
WHEEL DRIVER BOARD ASSEMBLY
04-11127
WHEEL DRIVER BOARD LED INDICATOR STATUS CHART
DESIGNATIONLOCATIONFUNCTIONCOLORSTATEMEANING
LED 1RIGHT CENTER
NEAR C5 & P2
INDICATORREDOFFNOT IN USE
ONNORMAL
OPERATION
BLINKINGPOW ER FAULT
(NOTE 1)
NOTES:
1.LED 1 monitors a regulated power supply voltage source.  Must be on continuously at all times.  Flash
or blinking indicates an intermittent connection, a power problem, a circuit fault, etc. 
						

							Troubleshooting6-1
HYDROTHUNDER

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. 
						

							Troubleshooting6-2
Coin Mechanism and Pricing Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Improper settings at
Pricing Menu
1. Enter Menu System by pressing and holding
TEST MODE switch inside coin door. From
Diagnostics Menu, choose SW ITCH TEST. Use
tests to confirm operation of switches.
2. From Adjustments Menu, choose PRICING
MENU. Verify that units and credits are set
correctly.
• VGM (video game machine)
accepts currency or tokens,
but number of credits per
coin or bill is incorrect.
Faulty wiring
1. Check that cabinet wiring is correct for this VGM.
2. Assure that coin meter and coin switches
connect properly to control input wires.
Improper currency
1. 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
mechanism
1. Unlock and open coin door. Check each
mechanism for proper mounting.
2. Remove mechanism.
3. Clear currency path.
4. Reinstall mechanism and latch it.
• VGM won’t accept currency
or tokens.
• VGM won’t start.
• Audio and video are present.
Tilted coin
mechanism or VGM
1. 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 bulb1. 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 circuit1. 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. 
						

							Troubleshooting6-3
VGM Startup Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Power problem
1. Check that VGM power switch is on.
2. Inspect computer to see if fans are turning. If
not: Is computer power supply connected to its
power cable? Is computer power supply turned
on?
3. Plug VGM into AC power outlet. Verify presence
of AC line voltage.
Improper line voltage
switch setting
Turn 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 fuse
1. Turn off VGM power. Examine AC fuse on power
chassis, under computer.
2. Examine DC fuses on cabinet wall or electronic
equipment shelf.
3. Replace faulty fuses with identically rated parts.
4. Turn on VGM power. If fuse opens again, check
DC wiring harness and connectors.
Faulty wiring
1. 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 computer cord 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
Arcade computer
problem
Turn off power for one minute and turn VGM on
again. Power On Self-Test checks electronics.
Screen may report errors. If video circuits don’t
operate properly, computer produces series of
beeps. (See Error Message Troubleshooting
Table.)
Location of Power Supply