Midway Hydro Thunder 25in Upright Service Manual
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Troubleshooting6-4 VGM Startup Troubleshooting Table, continued SYMPTOMCAUSEREQUIRED ACTION Power problem 1. 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. Computer has no internal LEDs. 2. Turn on VGM power. Using 20-volt DC setting on digital voltmeter, measure DC voltages at power connector pins. (Power supply voltage isn’t adjustable.) 3. Using 2-volt AC setting on digital voltmeter, measure same DC voltages as above. Any reading here indicates that supply voltages are unstable and may contain ripple or noise. Faulty wiring Turn off VGM power. Assure that wiring harness connectors fully seat onto mating board connectors. Verify that harness connects to computer. Check other connectors in same way. Improper jumper or DIP switch settings Verify 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 boards or arcade computer 1. Run power-up self-test sequence. Note errors or failures during tests. Compare LEDs with LED indicator status charts. Note discrepancies. 2. Turn off computer. W ait for hard disk to stop spinning. Leave VGM power on. Loosen computer case thumbscrews and lift off cover. Turn computer power on. Listen for beeping sounds. Compare beeps with Error Message Troubleshooting Table. 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
Troubleshooting6-5 VGM Startup Troubleshooting Table, continued SYMPTOMCAUSEREQUIRED ACTION Faulty coin mechanism 1. 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 switches 1. Enter Menu System by pressing and holding TEST MODE switch inside coin door. From Diagnostics Menu, choose SW ITCH AND LAMP TESTS. Use tests to confirm operation of each switch in VGM. 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 wiring 1. Assure that no wires are caught in hinges, latches or switch contacts. 2. Check wiring continuity from circuit board connectors to acceptors.
Troubleshooting6-6 Audio Troubleshooting Table SYMPTOMCAUSEREQUIRED ACTION Improper volume setting Enter Menu System by pressing and holding TEST MODE switch. From Operator (Main) Menu, choose VOLUME MENU. Check that Attract Music is on (enabled). Verify that all volume levels are set well above zero. If necessary, change levels to make VGM audible. Faulty wiring Turn off VGM power. Assure that wiring harness connectors attach and fully seat onto mating board connectors. Verify that harness connects to computer. Check audio cable connectors in same way. Faulty or obstructed speaker Remove grilles and inspect speakers. Free speaker cones, terminals, mounting screws and magnets of loose parts or wires. • No audio • Video is present • VGM (video game machine) appears to operate normally Faulty Audio BoardVerify proper operation of Audio Board by placing it in working VGM. Faulty wiring 1. 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. Faulty Audio Board 1. Run power-up self-test sequence. Note errors that VGM finds during tests. Compare Diego Board LEDs with LED indicator status charts. Note discrepancies. 2. Verify that Audio Board operates by placing it in working VGM. Replace bad parts. • Constant low hum from all speakers. Faulty power supply Using 2 Volt AC setting on digital voltmeter, measure voltages at speaker terminals. Any reading indicates unstable supply that may contain ripple or noise. Faulty or improper speaker 1. 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. W oofers must be rated for at least 40 watts. 2. Verify proper speaker operation by connecting speaker in question to working VGM. • Audio is distorted, muffled or has missing frequencies. Faulty wiring 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. Faulty speaker 1. From Diagnostics 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. Faulty circuit board Run power-up self-test sequence. Note errors that VGM finds during tests. Compare circuit board LEDs with LED indicator status charts. Note discrepancies. • Dead sound channel Faulty wiring Verify that cabinet wiring is correct. Assure that all speakers connect to audio wires. Audio cable must be fully seated in Computer Line Output Jack. Check for broken or shorted wires.
Troubleshooting6-7 Error Message Troubleshooting Table Power-On Self-Test Beep Codes (Audio beeps only. Video may or may not be present): See Note 1 MESSAGEMEANINGREQUIRED ACTION No beepNo system powerCheck power supply and cables 1 continuous beepPartial system powerCheck power supply and cables 1 short beepNormal start; no errorsCheck other VGM components 2 short beepsProcessor problemCheck processor/fan module 3 short beepsGraphics initialization problemCheck Video Board, cables 4 short beepsProcessor problemCheck processor/fan module 5 short beepsInsufficient system memoryCheck DIMM circuit modules 6 short beepsPeripheral problemCheck other VGM components System Error Message Codes (One or more lines of text appear on video screen): See Note 2 MESSAGEMEANINGREQUIRED ACTION CONFLICTING UNIT ID:Linking problemCheck for unique unit ID number GAME STARTUP:Normal start; no errorsCheck other VGM components VERSION MISMATCHSoftware problemCheck for differing revision level XXXX DATA LOAD:Corrupted files or failing circuitsCheck named drive or circuit XXXX INIT OR INIT FAILURE:Circuit/file initialization problemCheck named drive or circuit Notes 1. The audio buzzer that generates 1 kHz beeps is on the computer, inside the VGM (video game machine). If hearing beep codes is difficult, remove the cabinet doors and computer cover. 2. Arcade Computer circuit boards resemble those in personal computers. Yet Midway engineers reprogrammed the boards for application to this VGM. Power-On Self-Test codes are unique to the Arcade Computer in this VGM. 3. W iring or peripheral circuit problems may not trigger on-screen error messages. You may discover difficulties during Menu System diagnostic or calibration procedures. 4. Call your authorized distributor for help with unresolved error messages. NOTICE: Don’t attempt to move computer circuit boards into alternate slots. Midway assigned boards to specific slots. The custom operating system won’t recognize improperly placed boards, even though they function normally. Location of Beeper in Arcade Computer
Troubleshooting6-8 Link Troubleshooting Table SYMPTOMCAUSEREQUIRED ACTION Faulty wiring 1. Don’t extend linking cables that come with VGM. 2. Install required crossover between VGM cabinets. Each coupler connects two cabinets (one pair). Don’t use standard telephone type couplers or wiring to link cabinets. 3. Use only 10Base-T, Ethernet-type, Category 5, twisted-pair wiring for VGM data. • Can’t connect VGMs (video game machines) together Improper linking hardware Use required network hub for your local network. Hub Link Kit permits up to four cabinet connections. Cabinet array completion requires basic kit brackets and spacers. Improper settings 1. Record any error messages that occur during self-test. 2. From Operator (Main) Menu, choose Adjustments Menu. Then select Linked Play Adjustments Menu. Assure that you’ve set LINKED PLAY to ON. 3. Be sure that each VGM has unique ID number. Power problemIf hub is in use, verify that power is applied. AC adapter wires are thin and easily damaged. • VGM doesn’t recognize other players in linking operation • VGM functions normally by itself Faulty wiring (3 or more cabinets) 1. Inspect hub indicator lights. Each active port should have illuminated indicator. If cable connects, and that position has no lit indicator, check for cable continuity from hub to cabinet. 2. Assure that no loose wires catch in hinges, doors, or under cabinet. 3. Verify that linking cable connects to Network Board at each VGM’s computer. 4. Verify that each linking cable operates properly by placing it in working VGM. Improper hub switch setting 1. Assure that switches on hub are set correctly according to Hub Link Kit instructions. (Networked cabinets don’t require couplers. Hub has electronic crossover.) 2. Inspect hub indicator lights for link activity. See manufacturer’s literature for diagnostics. W rong software version Verify that all linked cabinets use same software version. Otherwise, linked cabinets won’t recognize each other. Contact your distributor. Faulty wiring (2 cabinets) 1. Insert crossover connections between coupled cabinets. Standard couplers appear identical to devices supplied with cabinets, but don’t include internal crossover. 2. Verify that each linking crossover coupler operates properly by placing it in working link between two cabinets. • Some VGMs in group link properly, while others don’t Faulty wiring (3 or more cabinets) 1. You used additional crossover connector and cable to extend VGM or hub link connection. Two crossovers cancel and cause same problem as no link crossover. 2. Connect cables directly to hub. Don’t use crossover coupler and hub together in single network. 3. Separate communications wiring from other wiring. W ires that must cross should cross at right angles to limit noise pickup.
Troubleshooting6-9 Player Control Troubleshooting Table SYMPTOMCAUSEREQUIRED ACTION Faulty switches or lamps 1. Enter Menu System by pressing and holding TEST MODE switch inside coin door. From Diagnostic Menu, choose SW ITCH TEST. Run tests to confirm switch operation. 2. Check for loose parts or wires caught in switch contacts. 3. Check continuity at each switch connection (Common to Normally Open or Common to Normally Closed). 4. Verify that control operates properly by placing it in working VGM. 5. Verify that dashboard switch light bulbs are type specified in parts listing. Other types light, but may produce too much heat. Eventually excess heat may cause switches to bind. • Intermittent or completely non-functional player controls • VGM (video game machine) starts normally. 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 control switches connect properly to control input wires. 4. Check that cabinet wiring is correct for this VGM. • Steering pulls to one sideFaulty W heel Driver Board Find power amp on W heel Driver Board’s large heatsink. Test and replace bad part or board. How to Adjust Belt Tightness
Troubleshooting6-10 Player Control Troubleshooting Table, continued SYMPTOMCAUSEREQUIRED ACTION Blocked or faulty fan W ith VGM power on, check airflow near each computer fan. Case cooling fans are intake fans. Power supply fan is exhaust fan. Assure that nothing blocks airflow. Faulty mechanical parts Turn off VGM power. Open dashboard. Support steering wheel and remove outer mounting screws. Remove metal shield (if your VGM has one) over motor. Inspect for faulty or worn belts, bearings, couplings, gears, etc. Faulty W heel Driver Board 1. Inspect W heel Driver Board under low-light conditions. LEDs glow if motor driver circuits receive AC power from transformer. (Voltages or signals may or may not be normal.) 2. Examine fuses and cables on W heel Driver Board. Replace bad fuses. Using digital voltmeter, verify AC voltage between each fuse holder and ground. You should measure approximately 25V. See W iring Diagram. 3. Using 20 VAC setting on digital voltmeter, measure DC voltage at motor. Don’t move steering wheel, drive belt, or motor while making this measurement. Any reading indicates unstable supply that may contain ripple or noise. 4. Verify proper operation of W heel Driver Board by placing it in working VGM. • Sloppy, unpredictable or ineffective steering • Video appears on screen • VGM (video game machine) starts normally Loose or worn drive belt 1. Turn off VGM power. Open dashboard. Support steering wheel and remove outer mounting screws. Remove metal shield (if your VGM has one) over motor. Inspect for faulty or worn belts, bearings, couplings, gears, etc. 2. If drive belt isn’t worn or damaged, check its tightness. Improperly set feedback 1. From Diagnostics Menu, choose FORCE FEEDBACK ADJUSTMENT. 2. Set feedback to match player requirements. Maximum force may be too extreme for very young or inexperienced customers. Faulty circuit 1. Examine fuses and cables on W heel Driver Board. 2. Check cables and wiring between computer, interface, driver and motor. 3. Check resistance of motor series resistors 4. Replace bad parts. • No wheel feedback • Steering aims vehicle as expected Faulty motor 1. Turn off VGM power. Open dashboard. Support steering wheel and remove outer mounting screws. 2. Remove metal shield (if you VGM has one) over motor. 3. Unscrew caps. 4. Inspect motor brushes. Replace worn parts.
Troubleshooting6-11 Player Panel Controls WARNING: The W heel Driver Board heatsink, power resistors, and other components may be very hot. The DC Motor in the steering wheel may also be hot. Steering Components
Troubleshooting6-12 Video Troubleshooting Table SYMPTOMCAUSEREQUIRED ACTION Power problem Verify 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 wiring 1. 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 and computer. 3. Assure that no wires are caught on chassis or mounting brackets. Improper monitor adjustments Check 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 circuitry 1. 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 (video game machine) 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.
Troubleshooting6-13 Video Troubleshooting Table, continued SYMPTOMCAUSEREQUIRED ACTION Floppy disk in drive Check floppy drive for diskette. If you find disk, eject it. Leave VGM power on. Turn off computer. W ait for hard disk to stop spinning. Turn on computer. Faulty wiring Loosen computer case lid thumbscrews and lift off cover. Assure that hard drive ribbon cable connector is fully seated into mating connector on motherboard. Check hard drive power cable. Improper components 1. Verify that hard disk drive is correct for this VGM. 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 includes more than one ROM. Label on each ROM records assembly number and software version. • VGM (video game machine) doesn’t appear • No audio • Power-up self-test runs Hard drive problems 1. Turn computer 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 screen Picture tube aperture mask is magnetized Remove 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. • W hite areas in center of screen appear tinged with color • Object edges have fringe of one or more colors Picture tube purity or static convergence is out of alignment 1. Turn on VGM. 2. Press and hold TEST MODE to enter Menu System. At Operator (Main) Menu, select Diagnostic Menu. Then select Monitor Patterns 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. W atch 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. 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.