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1. Precautions

1-1. General After-Sales Service Precautions

1. Donotletcustomersrepairtheproductthemselves.
Thereisadangerofinjuryandtheproductlifetimemaybeshortened.

2. Makesuretodisconnectthepowercordfromthewalloutletbeforerepairingtheproduct(especiallyforafter-salesserviceof
electricparts).
Thereisadangerofelectricshock.

3. Donotletcustomersplugseveralelectrichomeappliancesintoasinglewalloutletatthesametime
There is a danger of fire due to overheating.

4. Checkifthepowerplugorwalloutletaredamagedinanyway.
fadefectisfound,repairorreplaceitimmediately.(Thereisa
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danger of electric shock or fire)

5. Makesurethatitisproperlygrounded.(Checkthegroundofthe
walloutlet)
Electricityleakagemaycauseelectricshock.

6. Donotspraywaterontotheproducttocleanit.
There is a danger of electric shock or fire and it may shorten the
lifetimeoftheproduct.

7. Checktheassemblystatusoftheproductaftertheafter-sales
service.
Theassemblystatusoftheproductmustbethesameasbefore
theafter-salesservice.

8. Unplugthepowercordholdingthepowerplug(andnotthecord).
If the cord is disconnected, it may cause electric shock or fire.

9. Repairtheproductusingonlyauthorizedparts.

10. Keeptheproductawayfromheatingdevicessuchasheaters.
Exposure to heaters may cause deformation of the product or fire.




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1. Precautions

1-2. Safety Precautions
(1) EMI
ThisdevicehasbeenregisteredregardingEMIforresidentialuse.Itcanbeusedinallareas.

(2) Circuit Test (Logic Test) Precautions
TheLSIandMSIusedinthisproductaresemiconductorintegratedcircuitsbasedonMOS-FETorCMOS.Sincethesetypesof
devicesarehighlysusceptibletostaticelectricityorcurrentleakage,anisolationbreakmaybecaused.Thereforereadandfollowthe
instructionsbelow.
1) henhandlinganLSIorMSI,makesureyourbodyisgroundedthroughafewmega-ohmsofresistance.Inaddition,weargloves
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and a jacket made of cotton and not of synthetic fibers that easily generate static electricity.
2)Whenrepairingtheproduct,placeaconductivematerial(e.g.aluminumfoil)groundedtotheearthontheworktable.
3)Youmustuseasolderingironwithoutaleakagecurrent.
4)DonottouchthepinofanICandcarefullyinserttheICintotheblackplasticpackage.
5) heninsertinganICintoaPCB,becarefulwiththedirectionoftheIC.WheninstallinganICinthewrongdirection,itmight
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becomedamaged.
6) hencarryinganIC,packagetheICwithconductingmaterialsuchasaluminumfoilorconductingspongesoastokeepthe
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voltagelevelofeachoftheterminalsthesame.
7)SincethestoragetemperatureofanICisbetween-20~+70degrees,keepitatroomtemperature,ifpossible.
8)SincethestoragetemperatureofanICisbetween-20~+70degrees,keepitatroomtemperature,ifpossible.
9)WhensolderinganIC,solderitinasshortatimeaspossiblesothatunnecessaryheatisnotappliedtothedevice.
10) Avoid leaving excessive amounts of flux within a custom IC or between the pins when soldering a custom IC.
11)TakecaretonotdamagetheboardwheninstallingorseparatinganOptionBoard.
12)TakecaretonotbreaktheprintedcircuitpatternonthePCBwhenseparateanIC.


1-3. Ground
Theproductmustbegroundedtoprotectitfromstaticelectricityandotherdangers.Whenusingamultitap,pleaseuseamultitapwitha
groundterminalonly.
Ifyouusea220Vwalloutletwithagroundterminal,youdonotneedtogrounditadditionally.Avoidusingwalloutletsiftheyarenot
groundedeveniftheyhaveagroundterminal.
Togroundtheproduct,connectthegroundtoanexclusivegroundterminalormetalwaterpipe.Connectthegroundcabletotheground
terminalattherearofthemainbody.Togroundtheproduct,connectthegroundterminaloftheproducttoametalwaterpipe,walloutlet
orexclusivegroundterminalwithanelectricwireequaltoorthickerthan#18.
NevergroundtheproducttoaPVCwaterpipe,phoneline,TV,radioantenna,aluminumwindoworgaspipe,becausethisdoesnot
actuallygroundtheproductandmaybedangerous.


1-4. Static Electricity Precautions
Manypartsofthesystemaresusceptibletostaticelectricity.Usinganelectrostaticdischarge(ESD)deviceisveryimportantforthe
safetyoftheuserandtheuser'ssurroundings.UsinganESDdeviceincreasestheprobabilityofasuccessfulrepairandlowersthe
expensesfordamagedparts.

Topreventstaticelectricity,followtheinstructionsbelow.
1)Performtherepairinalocationwithoutstaticelectricity.
2) ouchyourhandstoametalwaterpipeorsomemetalobjectconnectedtothegroundtodischargeanystaticelectricity
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fromyourbodybeforehandlingtheparts.
3)Touchonlytheedgesoftheboard,ifpossible.
4)Donottouchanypartsunlessabsolutelynecessary
5)Disassemblethepartsontheanti-static-electricitypad.
6)Whenaboardisnotinstalledinthesystem,packagetheboardwithananti-static-electricitypackaging.


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