BBK AV311T User manual

servicemanual
AV311T

Catalog
ChapterOneAboutMaintenance
1.1Safetyprecautions
1.1.1Powersupply
1.1.2Precautionsforantistatic
1.1.3Aboutplacementposition
1.2Maintenancemethod
1.2.1Visualizedmethod
1.2.2Electricresistancemethod
1.2.3Voltagemethod
1.2.4Currentmethod
1.2.5Cuttingmethod
1.2.6Elementsubstitutionmethod
1.2.7Comparisonmethod
1.3Requireddeviceformaintenance
ChapterTwoFunctionsandOperationInstructions
2.1FEATURES
2.2ControlbuttonLocationsandExpLanations
2.2.1Frontpanelfunctionsandillustrations
2.2.2VFDDISPLAYY
2.2.3REARPANELILLUSTRATIONS
2.2.4ILLUSTRATIONSTOTHEREMOTECONTROL
2.3BASICOPERATIONS
2.3.1TurnOn/OfftheUnit
2.3.2Mute
2.3.3SelectInputSoundSourceandVideoSource
2.3.4SelectDecodeMode
2.3.5AdjustVolume
2.3.6AdjustChannelLevel
2.3.7AdjustMainChannelTone
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2.3.8SelectEQMode
2.3.9DEFAULT
2.3.10Karaoke
2.3.11Tuning
2.3.12Tuning(Continued)
2.3.13ChannelDelay
2.3.14NoiseTesting
2.3.15SelectSpeakerMode
2.3.16Headphone
2.4ACCESSORIES
2.5SPECIFICATIONS
3.1.1Compositionoftheplayer
3.1.2Functionandfeatures
3.2.1Signalprocessingboard
3.2.2Decodeboard
3.2.3Controlpanel
3.2.7MIC,headphoneboard
3.5.2functionintroductiontoPt2399
3.2.4Powerboard
3.2.5Poweramplifierboardandprotectioncircuit
3.2.6Videoinput/outputboard
3.3.1Servicingcases
3.3.2Troubleshootingflowchart
SectionFiveFunctionIntroductiontoIC
3.5.1functionintroductionto4558
ChapterThreeUnitCircuitPrinciple
SectionOnePrincipleoftheplayer
3.1.3Blockdiagramoftheplayer
3.1.4Signalflowchartoftheplayer
SectionTwoUnitCircuitPrinciple
SectionThreeServicingCases
SectionFourServicingParameter
3.4.1Signalwaveformdiagram
3.4.2Keypointvoltage
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3.5.3functionintroductiontoCd4051
3.5.4functionintroductiontoCd4052
3.5.5functionintroductiontoCd4053
3.5.6functionintroductiontoPt6311
3.5.7functionintroductiontoUTCLM4880
3.5.16functionintroductiontoNe5532
3.5.17functionintroductiontoPt2315
3.5.18functionintroductiontoCs4360
ChaptersixBOMList
6.1SIGNALDISPOSALBOARD
6.2SIGNALDISPOSALBOARDAISEGMENT
6.3DECODEBOARD
6.4DECODEBOARD-SMD
6.5AMPLIFIERBOARD
6.6SURFACECONTROLBOARD
6.7POWERBOARD
3.5.8functionintroductionto74HC04
3.5.9functionintroductiontoLm1875
3.5.10functionintroductiontoTDA2052
3.5.11functionintroductiontoM62446
3.5.12functionintroductiontoAT24C02
3.5.13functionintroductiontoL7805
3.5.14functionintroductionto7812
3.5.15functionintroductionto7912
3.5.19functionintroductiontoCd4094
3.5.20functionintroductiontoCs5340
3.5.21functionintroductiontoCs8415
3.5.22functionintroductiontoCs49326
ChapterFourDisassemblyandAssemblyProcess
ChapterCinquePCBboard&Circuitdiagram
SectionOnePCB
BoardSectionTwocircuitdiagram
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6.8MICROPHONEHOLDERBOARD
6.9VIDEOFREQUENCYBOARD
6.10REMOTECONEROLLER
6.11PANELUNIT
6.12PROGRAMCPU
6.13SNLABEL
6.14SUPPLEMENTMODULE
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ChapterOneAboutMaintenance
1.1Safetyprecautions
1.1.1Powersupply
1.1.2Precautionsforantistatic
Whenservicingaudiopoweramplifier,theservicingpersonnelpayspecialattentiontothepower
boardwith220VAC,orelsetheimproperoperationwillleadtobodydamage.Thealternatecurrent
whichoutputstopoweramplifierboardthroughpowerboardisalsouptovoltagewithabout50V;when
servicing,short-circuitandjointweldingcannotoccur,orelsetheelementswillbeburntoutandtrouble
rangewillbeenlarged.
Movementandfrictionwillbothbringstaticelectricitywhichcausesseriousdamagestointegrated
IC.Thoughstaticchargeislittle,whenalimitedquantityofelectricchargeisaddedtolarge-
scaleintegratedIC,asthecapacitanceisverysmallinthemeantime,nowtheintegratedICisverymuch
easytobestruckthroughbystaticelectricityortheperformancewilldecrease.Thusstaticelectricity
preventionisofextraordinaryimportance.Thefollowingareseveralmeasurestopreventstatic
electricity:
1.Useapieceofelectricconductionmetalwiththelengthofabout2metrestoinsertintotheearth,
andFetchtheleadwirefromthetopofthesurplusmetalandconnecttotherequiredstaticelectricity
device.Thelengthanddepthofthemetalembeddedundertheearthshouldbedeterminedaccordingto
thewettabilityofthelocalsoil.Forhumidplaces,itmaybeshorter,andlongeranddeeperfordryplaces.
Ifpossible,itcanbedistributedandlayedintermsof“#”shape.
2.Onoperatingtable-board,theantistatictablecushionshouldbecoveredandgrounded.
3.Alldevicesandequipmentsshouldbeplacedontheantistatictablecushionandgrounded.
4.Maintenancepersonnelshouldwearantistaticwristringwhichshouldbegrounded.
5.Placesaroundtheoperatingpositionshouldalsobecoveredwithelectricconductioncushionor
Paintedwithantistaticpaint.
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1.1.3Aboutplacementposition
1.2.1Visualizedmethod
1.2.2Electricresistancemethod
1.2.3Voltagemethod
1.2.4Currentmethod
1.2.5Cuttingmethod
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2.Positionsforplacementshouldbestableandsecure.
Directlyviewwhetherabnormalitiesofcollision,lackofelement,jointwelding,sheddingwelding,
rosinjoint,copperfoilturningup,leadwiredisconnectionandelementsburningupamongpinsof
elementsappear.Checkpowersupplyofthemachineandthenusehandstotouchthecasingofpartof
elementsandcheckwhethertheyarehottojudgethetroublespot.Youshouldpaymoreattentionwhen
usingthismethodtocheckinhighvoltageparts.
Setthemultimeterinresistancepositionandtestwhetherthenumericalvalueofresistanceofeach
pointinthecircuithasdifferencefromthenormalvaluetojudgethetroublespot.Butinthecircuitthe
testednumericalvalueofresistanceisnotaccurate,andthetestednumericalvalueofintegratedIC's
pinscanonlybeusedforreference,sotheelementsshouldbebrokendownfortest.
Voltagemethodisrelativelyconvenient,quickandaccurate.Setthemultimeterinvoltageposition
andtestpowersupplyvoltageoftheplayerandvoltageofacertainpointtojudgethetroublespot
accordingtothetestedvoltagevariation.
Setthemultimeterincurrentpositionandtestcurrentoftheplayerofacertainpointtojudgethe
troublespot.Butwhentestingincurrentmethod,themultimetershouldbeseriesconnectedinthe
circuit,whichmakesthismethodtootrivialandtroublesome,soitislessfrequentlyusedinreality.
Cuttingmethodshouldbecombinedwithelectricresistancemethodandvoltagemethodtouse.
Thismethodismainlyusedinphenomenaofshortcircuitandcurrentleakageofthecircuit.When
cuttingtheinputterminalvoltageofacertainlevel,ifvoltageoftheplayerrisesagain,itmeansthatthe
troubleliesinthislevel.
Audiopoweramplifiercannotbeinstalledinplaceswithhightemperatureandhumidity.
1.2Maintenancemethod
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1.2.6Elementsubstitutionmethod
1.2.7Comparisonmethod
Whensomeelementscannotbejudgedgoodorbad,substitutionmethodmaydeadopteddirectly.
AsamegoodPCboardisusuallyusedtotestthecorrectvoltageandwaveform.Comparedthese
datawiththosetestedthroughfaultPCboard,thecauseoftroublesmaybefound.
Throughtheabovemaintenancemethod,theoreticalknowledgeandmaintenanceexperience,all
difficultiesandtroubleswillbereadilysolved.
AudioGenerator
Digitaloscillograph(100MHE)
SMDreworkstation
Multimeter
Solderingiron
Pointed-monthpincers
Cuttingnippers
Forceps
Electricscrewdriver
Terminalsconnectingcord
Headphone
Microphone
1.3Requireddeviceformaintenance
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ChapterTwo
FunctionsandOperationInstructions
2.1FEATURES
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With5.1CHinputterminal,capableofconnectingwithexternalmulti-channeladvanceddecode
outputsignalssuchasDOLBYDIGITAL,DTS
Built-inFM/AMtuner
DolbyDigital,DTS,DolbyProLogicII,DSP,STEREOdecode
Noisetesting
High-performancedigitalKaraoke,withMICvolume,toneandechoadjustment
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2-waycoaxialdigitalsignalinput,1-wayopticaldigitalsignalinput
Withsubwooferoutputterminal,capableofconnectingwithactivesubwooferspeaker
Withheadphoneoutputjack
6CHdigitalvolumecontrol
Separateleveladjustmenttoleft,right,centre,surroundandsubwooferchannel
Automaticallyrecognizeinputsignalformatandselectthecorrespondingdecodemode
Decodemodemanualselection
Mainchannelhigh/lowtoneadjustment
VideoandS-Videoselectedfunction
Centre,surrounddelayadjustmen
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5presetEQmodes
Digitaltuningfunction
Capableofstoring36FMand12AMradiostations
Automatically/Manuallysearchingradiostations
Automuteifthereisnosignal
Separate5CHpoweramplification
Speciallyautomaticprotectionofshort-circuit,over-voltageandover-current
Fullremotecontroloperation
Completeunitinterface
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REARPANELILLUSTRATIONS
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MHZ LIVE
DISCO
KHZ
CH HALL
STAGE
STADIUM
STEREO
DIGITAL OPTICAL
PRESET
SLEEP
MP3
SOUNDFIELD
SL SR
R C L
MUTE
STERO
TUNER
HOMETHEATRERECEIVERAV311T
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2.2ControlbuttonLocationsandExpLanations
2.2.1Frontpanelfunctionsandillustrations
POWERswitch
Switchon/offtheACpoweroftheunit
MENUbutton
MENUbutton,pleaserefertotherelated
chaptersfordetails
Multi-FunctionKnob
Innormalworkingmode,synchronously
adjust6-channellevel.Inaddition,by
usingthisknobandMENUbutton,you
mayfulfilmultiplefunctions.Pleaserefer
totherelatedchaptersfordetails...
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Headphonejack
MICjack
IRsensorwindow
Receivetheremotecontrolsignals.
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2.2.2VFDDISPLAY
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