Benchmark Games Monster Drop Operating instructions

Brand: Benchmark Games

Model: Monster Drop

Type: Operating instructions

This manual is also suitable for

MONSTER DROP X-TREME

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TableofContents

ManualRevisionHistory3

BasicComponents4

GameSetup5

UnloadingMachine5

Assembly7

PayoutandAdjustments11

GamePlaySequence/Behavior12

TechnicalOperation13

Wheellocationandballscoring13

BallLiftOperation13

BallDropOperation13

InterBoardCommunications14

MainElectronicComponents15

CircuitBoardLocations15

ElectronicsandDescriptions15

ProgrammingOptions21

AlternativeTicketingandCardSwipeSystemConfigurations 24

ErrorCodesandTroubleshootingGuide27

MechanicalDrawings29

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2

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ManualRevisionHistory

RevisionA‐01/20/11‐ReleasetoProduction

RevisionB‐0420/2012‐

• Page7‐Addedballcountinballboxtopartslist

• Page13‐Updated‘BallLiftOperation’description

• Page9‐Add’9ballsperside’toAssemblyInstructions

• Page28‐Add‘Wrongnumberofballs’totroubleshootingguide

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3

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1‐BasicComponents

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4

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2‐GameSetup

UnloadingMachine

*Notes:

• Thefollowinginstructionsmustbeduplicatedforeachcabinetside.

• ‘A’sidecabinetcontainscircuitboardsinthelowercabinetwhile‘A’sidecabinetcontainsno

circuitboardsinthelowercabinet.



1. Carefullyremovepackingmaterialandunloadmachinefrompallet

2. Removepartsfromtopofmachine

a. Remove8HexBoltsthatattachpartstotheCorner

Extrusions(2ineachcorner).

b. Carefullyremovepartsfromthetop.TheLowerCabinetTop

(loweryellowpartthatholdstheupperendofthefrontdoor

hingetube)remainsinplace

i. Thereare(7)partsthatshouldberemovedfromthe

top.TheUpperCabinetTop(purple/white),Upper

CabinetBase(yellow),(2)UpperCabinetTopPanels

(clearplexiglass),(2)TopMirrorSides,andaTopMirrorFront



3. Remove(2)uppersideglasspiecesbyslidingupandout



4. Openupperfrontdoortoaccesspartsforassembly

5. Remove(10)screwsfromCapturePlatetoaccessExtrudedCorners

andremovecornersbyslidingoutthefront

6. Remove(5)containmenthooksholdingflatpartsandassembliesin

place.

a. *Tip:Thesemaybedifficulttoaccess.Youcanturnthem

90degreestofreethepartsandremovethemlater.

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5

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7. Removeflatpartsandassemblies(Uppercabinetbackassembly,uppercabinetfrontwindow,

(2)uppercabinetsidewindows)

8. Removepackingsupportribs.

9. RemoveConsole

a. Openlowerfrontdoorandslideconsoleoutofthefrontof

thecabinet

b. Remove(2)screwsattachingtheConsoletotheCashBox

Top

10. Remove(3)boxesfrominsideoflowerBsidecabinet.Thereisa

boxcontainingthe‘GameBalls’,onecontainingthe‘LiftBelts’,and

onecontainingthehardware



11. Removecoinchute

a. Openlowerfrontdoorofthe‘A’sidecabinet

b. Removescrewsattachingcoinchutestoinsiderightside

ofcabinet

c. Removecoinchutes



12. RemovetheMarqueeAssemblyfrombottomofcabinet

a. OpenthetwoRearAccessDoors

b. RemovethescrewthatattachesMarqeetotheinsideof

thecabinet

i. Afterremoving,replacescrewinMarqueeforlater

use

c. RemoveMarquee

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6

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PartsforOneSideTopAssembly

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①UpperCabinetFrontWindow

②UpperCabinetSideWindow(2)

③UpperCabinetFrontBallLift

④UpperCabinetTop

⑤UpperCabinetBase

⑥Marquee

⑦UpperCabinetBackAssembly

⑧CoinChute

⑨TopMirrorSide(2)

⑩TopMirrorFront

⑪UpperCabinetTopPanels2x

⑫ExtrudedCorners(4)

⑬Console

⑭BallBox

• Playballs(18ballstotal)

⑮LiftBeltBox

• (2)LiftBelts

⑯HardwareBox

• (2)ScrewKits

• (12)MirrorBrackets

• PowerCord

• TicketDispenserOil

• CableClamps

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Assembly

1. Attach‘ExtrudedCorners’to‘UpperCabinetBase’

a. Use(12)¼‐20x1”flatheadscrewstoattachthe‘UpperCabinet

Base’tothe(4)extrudedcorners

b. BesuretopayattentiontothepositionofeachExtrudedCorneras

theyallhaveaspecificposition.The‘UpperCabinetLeftFront

ExtrudedCorner’islocatednexttothehingeposthole

c. ExtrudedCornersshouldbemountedtothesamesideofthe‘Upper

CabinetBase’thatcontainstheslotcuts

2. RemoveprotectivefilmorpaperfromtheRightSideRearCoverofthe

‘UpperCabinetBackAssembly’

3. Slidethe‘UpperCabinetBackAssembly’downinto

the‘ExtrudedCorners’inthepositionbetweenthe

RightandLeftRearExtrudedCorners

4. Slide(2)UpperCabinetSideWindows(containtwo

drilledholes)downintotheExtrudedCorners,one

ontheleftsideandoneontherightside

7



5. Slidethe‘UpperCabinetFrontWindow’(containsonedrilledhole)intothetwoFrontExtruded

Corners

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6. Attach‘UpperCabinetTop’totheExtrudedCorners‐*Tip:Thisstep

willbeeasierifmaskingtapeisusedtoattachthesideglasspieces 

totheExtrudedCornerssothattheystaytogetherduringassembly

a. Set‘UpperCabinetTop’ontotheExtrudedCornerssothat

theSideandFrontWindowsfitintotheslotcuts.Position

theTopsothatthelargeharnessconnectorsarelocatedat

thefrontrightcorner

TapeCornersforEasierAssembly

b. Use(8)¼‐20x2”longPhillipsTrussHeadscrewsfromthescrewbag

toattach‘UpperCabinetTop’totheExtrudedCorners

c. AttachUpperHarnessestoExtrudedCornerHarnessesbyrunning

theconnectorsontheUpperHarnessthroughtheholesinthe

cornersofthe‘UpperCabinetTop’andpluggingin.

d. ConnectSolenoidtoUpperharnessbyrunningtheconnector

throughtheholeinthe‘UpperCabinetTop’totheSolenoidHarness

e. ConnectUpperHarnesstotheUpperLights



7. InstallMirrors

a. Peelprotectivefilmorpaperfromthe

mirrors

b. Attach(2)‘MirrorBrackets’toeachof

the(3)mirrorsusing#8x3/4”sheet

metalscrews

i. Attachthe‘MirrorBrackets’to

themirroredsideofthe

mirrorsdrivingthescrewsin

fromthegreycoloredside

c. Install‘TopMirrorFront’tothefront

oftheTopAssemblyusing(2)#10‐32x1‐1/2”machinescrews

d. Install(2)‘TopMirrorsides’tothesidesofthetopassemblyusing(2)each#10‐32x1‐

1/2”machinescrews

e. Attachmirrorstogetherusingcableties throughholesinbottomcornersofmirrors

8

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8. InstallMarquee

a. MountMarqueeusing(2)#10‐32x3”machinescrews.

b. Connectharnesstomarquee.

c. RemovebagcontainingNutandScrewCap.

d. FastenNutontoUpperScrewonMarquee.

e. SnapScrewCapoverUpperScrewhead.



9. Install(2)TopGlass

a. Removeprotectivefilmanddropintoplace 



10. Install(2)UpperSideGlass

a. SlideUpperSideGlasspiecesintoplace

b. Attachsideglasswith(6)#8x¾”sheetmetalscrews

perside



11. MountTopAssembly

a. Withonepersonateachcornerof

theTopAssembly,lifttheTop

Assemblyandsetitontopofthe

BaseAssembly.

b. Install(4)¼‐20x1‐1/2”screwsand

¼‐20LockNutstosecureTop

Assembly

i. Twoofthescrewsfasten

therearcorners

Twoofthesc

outsidethecabinetat

SetTopAssemblyontoBase

ii. rewsfasteninsidethecabinetatthefrontcorners

9



c. Connectharnessatfrontleftinsideofmachine



12. InstallLiftBelt

a. RemoveUpperLeft

RearCabinetCoverby

removingmounting

screws

b. RemoveLowerBelt

Coverbyremoving

mountingscrews

c. HangLiftBeltonUpper

Pulleyandfeedbelt

downintolowercabinet

d. StretchLiftBeltoverLowerPulley

e. AttachDriveBeltbetweenmotorand

LowerBeltPulley

f. ‘Snap’beltintochannelsinBeltGuides

i. VerifythattheLiftBeltruns

freelybypullingdownonthe

rightsideofthebelt

viewofinsidelowercabinet

g. ReattachLowerBeltCoverusingthe

screwsremovedwhenitwastakendown

h. AttachUpperBeltCoverUsing(4)#6x¾”sheetmetalscrews



13. InstallConsole

a. AttachCoinChutetoLowerFrontDoorby

insertingintoslotsandpushingdowntolockinto

place

b. MountConsoleusing(4)#8x1‐1/4”screws

c. AttachConsoleHarness



10



14. Attachharnessconnectingleftandrightsidesofcabinetbyrunning

the‘A’sideharnessthroughaholeintherightrearbottomandup

intotheleftrearbottomofthe‘B’sidecabinet.



15. ConnectPowerCordandturnthemachineon.

16. Loadballsintothewheelholes.Besurethatthereare9ballsperside

inthemachine(nomore,noless)forproperoperation



PayoutandAdjustments

viewthroughrearaccessdoor

*Note:Standardmachineassumes1centticketvalue.Customwheelvalues

maybenecessaryifrunninganythingdifferent.

Werecommendrunningthemachineatthedefaultfactorysettingsasastartingpoint.Theco stperplay

shouldbefourcoinsataboutaquartervaluepercoin.Adjustasnecessaryperyourlocation.

Hereishowtoconfigurethegamefordifferentcreditvalues:

25centplay

• JackpotIncrement‐1

• JackpotStartValue‐100

• MonsterJackpotIncrement‐1

• MonsterJackpotStart1000

50centplay

• JackpotIncrement‐2

• JackpotStartValue‐200

• MonsterJackpotIncrement‐2

• MonsterJackpotStart2000

OneDollarPlay

• JackpotIncrement‐4

• JackpotStartValue‐400

• MonsterJackpotIncrement‐4

• MonsterJackpotStart4000

11



Runthegamefortwoweekstoproperlyaverageapayoutpercentagebeforeadjustinganythingasthe

machinemayshowfalsepayoutspikesduetojackpothotordryrunsovershortperiods.

Toincreasethepayout,increasethe‘JackpotIncrement’settingdescribedinthe‘Programming’section.

Eachincrementupwillincreasethepayoutbyabout4%at$0.25perplay,2%at$0.50perplay,or1%at

$1.00perplay.Furtheradjustmentcanbemadebyincreasingthe‘JackpotStartValue’,‘Monster

JackpotIncrement’,or‘MonsterJackpotStart’values.

Todecreasethepayout,decreasethe‘JackpotStart’settingdescribedinthe‘Programming’section.

Thoughnotrecommendedunlessabsolutelynecessary,furtheradjustmentcanbemadebydecreasing

the‘JackpotStartValue’or‘MonsterJackpotStart’values.

3‐GamePlaySequence/Behavior

I. Power‐UpInitializationSequence

a. Wheelbeginsspinning, displaysandLED’slightup,andballliftmayruntofilltheball

troughifitneedsaballorballs.

II. AttractionMode:

a. Variouslightsandsoundsaretriggeredataprogrammablefrequency

III. AddingMoney:

a. “Coin‐in”or“bill‐in”soundisheardonspeaker.

b. Whenenoughmoneyisaddedtobuycredit(s),thecurrentcreditsvaluewillbeshown

ontheJackpotdisplay,andthegamewillenterPlay‐Mode

IV. PlayMode:

a. Playsoundsstart

b. Playbuttonflashes

V. PlayerHitsButton:

a. Balldropsontoplayfield

b. BallLiftbeginstoruntoreplenishplayedball

c. Ballliftstopswhenplayedballsarereplenishedintheballtrough

VI. Scoring/Payout

a. BalldropsintoholeonwheelorintoMonsterJackpothole

b. LightandSoundcelebrationifJackpotishitorstandardwinsoundwhenothervalueis

hit

c. Gamepaysappropriatetickets

d. Ifplayerhasmorecredits,themachinewillcontinueonplaymode,otherwisethegame

willgobackintoAttract‐Mode.



12



4‐TECHNICALOPERATION



WheelLocationandBallScoring

Theplayfieldwheel1isdri venbyasteppermotor2usingafriction

drive.Thereisatab

3positionedexplici tlyattheedgeofthewheel

asahomeposition.Thetabtravelsthroughanoptosensor

4

mountedtotheplayfieldu nderneaththewheelonceperwheel

revolutionequatingthemotorstepcounttothewheelposition.

Thereisanoptosensorpair

5(transmit&receive)underneaththe

playfield

6tosensewhenaballhasfallenthroughthewheel.

Thesesensorshaveashortharnessconnectingtosensorcircuit

boards7locatedonthetopsideoftheplayfieldsothatthesensor

statuscanbeviewed.

Sincethecomputerknowswherethepininthewheelisrelativetoeachholepositionanditknowshowmany

motorstepsfromhometoeachhole,weknowexactlywhichholetheballfellthroughallowi ng apayout

accuratelycorrespondingtotheholeposition.



BallLiftOperation

Asteppermotor1isconnectedtotheballliftviaaurethaneroundbelt2.Thereisanoptopair3(transmitter

&receiver)locatedintheballtrough

4usedtosensetheloadingofaball.Aftereachplay,whenasingleball

rollsdownthetroughandpasttheopto ,theballliftwillstop.Theballliftwillrunaftereachballisdropped

replenishingtheballinthetrough.



 



BallDropOperation

Thereisasolenoid1locatedabovetheballtrough2. The

solenoidplunger

3directlycontactsthefirststagedball

containingitinthetrough.Whencreditsareavailableandthe

playbuttonispressed,thesolenoidisactivatedpullingthe

plungerupandawayfromtheballallowingittorolloutofthe

trough,downtheballchute,andintoplayonthewheel.The

plungerreturnsjustafterthefirstballisclearedintimetoblock

thenextstagedballandkeepitfromdroppinguntiltheplay

buttonispressedagain.

13



Inter‐BoardCommunication



TheCircuitBoardscommunicatewitheachotherusinga485differentialwire‐pairnetwork,usingtheSNAP

softwareprotocollayer.



‐Onthismachine,thiswirepairhascolorsBlueandGray.



‐TheMainCPUBoardactsasthemaster,initiatingcommands

andreceivingresponsesfromtheslaveboards.



‐Like‐boardsdifferentiatefromeachotherbymeansofanID‐

Switchsetting.Seethefollowingpagestofind

eachboard’sID‐Switchlocationandsetting.



‐Thefollowingboard(s)areNOTconnectedtothe485network:

>ThePowerdistributionboard.

>TheOptoSensors.



‐Notethatthe485networkwire‐pairchainjumpsfromboardtoboard:



>Insomeplacesthechainingisdonebydouble‐crimpsattheconnector

(theseareusually2‐pinconnectors)



>Inotherplaces,PCBtracesontheboarditselfcarrythechainfromapairofconnectorpins

tothenext(usuallyafour‐pinconne ctor);thus,disconnectingsuchaboard’s485mightactually

disconnecttherestofthe485chain.Keepthisinmindwhentroubleshootingorreplacingparts.



‐485Communicationnetworkchain: 



MainCPU





Ticketdispenserconnecto r



QuadStepper



IO‐Expander‐1



SoundBoard



 PlayfieldPlayer1

 PlayfieldPlayer2

 MonsterJackpotMarquee



14



MainElectronicComponents



CircuitBoardLocations



Theviewinsidethegamewiththelowerdooropen.



ElectronicsandDescriptions

MainCPUBoard

Part#PCB10002

Location:Insidelowercabinet

ID‐Switchsetting:None,thisisthemasterboard.



Thisboardisthemaincontrollerofthegame.Itdecidesallthe

gameactionsandcommandstheotherboardstoactaccordingto

thegamescheme.



Communicationtotheotherboardsisperformedviaa485

differentialwire‐pair(Grayandbluewires).

The‘ProgrammingMode’game‐settingsinformationisalsosaved

onthisboard.

TheactualGamecoderesidesontheremovableFlash‐Romchip

(U4);thischipcanbereplaced/upgradedifnecessary(UsingaPLCC32extractortool).

J1: DC POWER, 5V

J2: LOGIC

OUTPUTS

J3: LOGIC

INPUTS

485 Communication

U4: Game Program Flash ROM

LCD Display Control

15



MainROMprogramVersionUpdates:

J3: OUTPUTS,

Open Collector

J1: LOGIC INPUTS

ID-Switch

J2: Power, 12V

485 Communication

Switch 1

INPUTS

Switch

Outputs



PowerDistributionBoard

Part#PCB17001

Input Voltage LEDs (must be On)

Location::Insidelowercabinet

ID‐Switchsetting:None,boardhasnocomputer.

Switch 2

Poly Switch Fuses (1A)



Circuit overload LEDs

Switch 3

DistributesDCpowerfromthepower‐supplytothedifferentdevices,througha

Poly‐Switch(thermal,resettablefuse)foreachvoltagecircuit.

Notthatforconvenience,the‘ProgrammingOptions’Buttonsarealsolocatedon

thisboard,althoughthey’renotpowerrelated.

OUTPUTS



Powerisdistributedinthefollowingmanner(worstcaseestimations):



Board/Device   EstimatedconsumptionFusecircuit(seeboard)

‐QuadStepperBoard(mainCPU)+4Motors (24V,3A) (*24A*)

‐SoundBoard(onTopPanel)  (12V,140mA)(*12B*)

‐IO‐Expander1(+PlayfieldTopLights) (12V,500mA) (*12C*)

‐IO‐Expander2(+PlayfieldBottomLights) (12V,500mA) (*12C*)

‐IO‐Expander3(+Coin/Bill,light‐strips) (12V,4A) (*12A*+*12D*)[3Apeak:BillAcceptor]

‐x3Optosensors(TrapDoorAssy)  (5V,60mA) (*5A*)

‐x2Optosensors(ClawAssy)+CreditsDisplay (5V,160mA) (*5B*)



RelatedNote:

Note:Thereare2ACfusesonthePowersupplygroup(10Amp,250V).They’refoundinsideoftheICE‐C13

receptacleonthepowersupply.



J2: LOGIC INPUTS

485 Communication

J1: MOTOR DRIVER OUTPUTS

J3: Power, 12V

ID Switch

QuadStepper1

Part#PCB11006

Location::Insidelowercabinet

ID‐Switchsetting:00(off‐off)



ThisStepper‐motorcontrollerboardhandlesthemovementsofthe

twowheelmotorsandthetwoballliftmotors.



IO‐Expander1

Part#PCB14008

Location::Insidelowercabinet

ID‐Switchsetting:0100(off‐on‐off‐off)



HandlesallLED’slocatedinthetwomaincabinetareas(allexcept

marqueeLED’sandRGBLED’s)

16



IO‐Expander2

Part#PCB14008

Location:Insidelowercabinet

ID‐Switchsetting:0000(off‐off‐off‐off)NAHardCodedforRGBLEDs



HandlestheRGBLEDChaseLighting



IO‐Expander3

Part#PCB14008

Location:InsidePlayer1Marquee

ID‐Switchsetting:0000(off‐off‐off‐off)



HandlestheLED’sintheplayer1Marquee.



IO‐Expander4

Part#PCB14008

Location:InsidePlayer2Marquee

ID‐Switchsetting:1000(on‐off‐off‐off)



HandlestheLED’sintheplayer2Marquee.



SoundBoard

ID-Switch

485 Communication

RCA AUDIO OUTPUT

Power, 12V

SD-CARD

BAY

Part#PCB041

Location::Insidelowercabinet

ID‐Switchsetting:0000(off‐off‐off‐off)



Handlesbackgroundandeventsounds.

Soundfilesarestoredontheplug‐inSD‐cardmemoryboard.



OptoSensors

Part#PCB009[RightAngleConnector]

Location:Underneathplayfieldwheel

Qty:x4

ID‐Switchsetting:None,ithasno485communication.

Itdetectsthewheelhomepositionandtheballthroughthewheel.



Notes:

ThissensorboardhasaGreenLEDthatlightsupwhentheIRbeamis

interrupted.

Thetwoball‐sensesignalsgototheQuadstepperBoardInputs,J2connector 

17



Large5‐DigitDisplay

Part#PCB033

Location:(2)Insideplayareamountedtobackpanels&(1)InsideEachMonsterJackpotdisplayassembly

Qty:3(1forJackpotsPlayer1andPlayer2&1forMonsterJackpot)

ID‐Switchsettings:

Jackpot/CreditsDisplayPlayer1:000000Jackpot/CreditsDisplayPlayer2:010000

MonsterJackpotDisplayPlayer1:001000MonsterJackpotDisplayPlayer2:101000

TheID‐SwitchislocatedonthebackoftheDisplayandislabeledas“S1”.



Large2‐DigitDisplay

Part#PCB034

Location:(2)Insideplayareamountedtoback

Qty:2(1eachforBonusBallsPlayer1andPlayer2)

ID‐Switchsettings:

BonusBallsDisplayPlayer1:100000BonusBallsDisplayPlayer2:110000

TheID‐SwitchislocatedonthebackoftheDisplayandislabeledas“S1”.

 



18



TicketDispensers(Intelli‐TripleSeries)

Part#

Location:TicketSide‐Doors

Qty:x2(1foreachplayer side) 

IMPORTANTNOTE

:TheseticketdispensersforMonsterDropX‐TremeDONOTusethestandard“Run”and

“Notch”linestocommunicatewiththemainCPUBoard;instead,theydoitthroughthe485comm.network.

Becauseofthis,youmustbesurethesedeviceshavecodeversionTDT7orhigher(seestickeronPC‐Board).

TheyalsoneedtohavetheproperIDswitchsettings,asfollows.

ID‐Switchsettings:Player1:000000Player2:100000

TheCircuit‐boardandID‐SwitchwithinarepartoftheTicketDispenserdevice,ontheunderside.

Formoreinformation,seeBenchmark’sTicketDispensermanual.



ID‐Switch

485Communication



OptoSingleReceiverBoard(OnboardReceiver)

Part#:PCB021

Location:BallTrough

Qty:4(1foreachplayfieldandballdropassembly)

Thisboardmountstotheballtrough.Itsensesthethirdstagedballin

theballtrough.

19



OptoSingleTransmitterBoard(OnboardTransmitter)

Part#:PCB020

Location:BallTrough

Qty:4(1foreachplayfieldandballdropassembly)

Thisboardmountstotheballtrough.Itsensesthethirdstagedballin

theballtrough.



4‐PROGRAMMINGOPTIONS

ProgrammingtheMonsterDropX‐TremeGame



EnteringProgrammingMode



Toenterprogrammode,presstheCenterButtonlocatedonthePowerDistributionBoard,

locatedinsidetheleftdoorontheleftsideofthe cabinet.“MONSTERDROPX‐TremeV.X.X

–PROGRAMMODE”willappearontheLCDDisplaylocatedinsidethecabinetnexttothe

PowerDistributionBoard.

IfthereareticketsowedthathavenotbeenpaidforGame1orGame2,thentheywillbe

displayedatthistimewiththeoptiontoclearthem.Toclearthetickets,depresstheCenter

Buttonagain.Ifyouwishtoproceedwithoutclearingthetickets,thendepresseitherthe

FrontorBackButton.

Iftherearenoticketstobeclearedoryouhaveoptednottoclearthem,then“ENTER

PROGRAMMODE?”willbedisplayed.DepressingtheCenterButtonagainwillenterthe

ProgramMode.DepressingeithertheFrontorBackButtonwillrevertthegamebacktoRun

Mode.



IfProgrammingModeisselected,then“ENTERPASSCODE”willbedisplayedwiththefirst

digithighlightedwithaflashingcursor.



“ENTERPASSCODE”

Tobeabletochangeprogrammingparametersorresetthecounters,a4‐digitpasscode

mustbeentered.Thedefaultpasscodeis0000.Toenterthepasscode,depresstheCenter

Buttontochangethedigitfrom0to9,thenpresstheFrontButtontomovetothenext

digit.Ifyouhavemovedtoanewdigitandwishtomovebacktoapreviousdigit,depress

20



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Benchmark Games Monster Drop Operating instructions

Brand: Benchmark Games

Model: Monster Drop

Type: Operating instructions

This manual is also suitable for

MONSTER DROP X-TREME

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Benchmark Games Monster Drop Operating instructions

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Benchmark Games Monster Drop Operating instructions

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