BBK DK2810HD User manual

DK2810HD
service manual
DK2871HD
DK2870HD

Catalog
1.1 Safety precautions
1.1.1 Power supply
1.1.2 Precautions for antistatic
1.1.3 Precautions for laser head
1.1.4 About placement position
1.2 Maintenance method
1.2.1 Visualized method
1.2.2 Electric resistance method
1.2.3 Voltage method
1.2.4 Current method
1.2.5 Cutting method
1.2.6 Element substitution method
1.2.7 Comparison method
1.3 Required device for maintenance
Chapter Two Functions and Operation Instructions
2.1 Features
2.2 Controls and functions
2.2.3 VFD display general view
2.3 FUNCTION SETTINGS
2.3.1 Function selection and change
2.3.2 Language settings
Chapter One About Maintenance
2.2.1 Front panel controls
2.2.2 Rear panel connections
2.2.4 Remote control general view
2.3.3 Image settings menu
2.3.4 Sound settings menu
2.3.5 Playback settings
2.3.6 Karaoke settings menu
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2.3.7 Preference settings
2.3.8 Parental Control
3.2.1 Introduction to laser head
3.2.2 Decode cirauit
3.2.3 servo circuit
3.2.5 Main axis braking control circuit
3.2.6 Tray open/close driving circuit
3.2.9
3.2.10
2.3.9 Initial setupmenu
2.3.10 Resetto defaults
2.3.11 Exit settings menu
2.3.12 Channel d elay set-up
2.3.13 Night mode
2.4 MISCELLANEOUS
2.4.1 Useful notes
2.4.2 Trouble shooting
Section One Player principle
3.1.1 Brief introductions of function
3.1.2 Block diagram of the player
3.2.4 Disc identification circuit
3.2.7 Reset circuit
3.2.8
Video circuit
Audio power amplifying circuit block diagram
Section Three Troubleshooting Cases
3.3.1 Troubleshooting Cases
3.3.2 Flow chart of troubleshooting
Section Five Function Introduction to IC
Chapter Three Principle and Troubleshooting
3.1.3 Introduction to IC of the player
Section Two Unit Circuit Principle
Mute circuit
3.2.11 HDMI circuit
3.2.12 Control panel components
3.2.13 Power circuit
Section Four Waverorm diagram
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Chapter Fou Disassembly and Assembly Processr
Section One PCB board
Section Two circuit diagram
Chapter Cinque PCB board & Circuit diagram
Chapter Six Bom List
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Remark:
Appearnce silk pirnts of DK2810,DK2870,DK2871 are different.

Chapter One About Maintenance
1.1 Safety precautions
1.1.1 Power supply
When maintenance personnel are repairing DVD players, he should pay special attention to the
power board with 220V AC and 330V DC which will cause hurt and damage to persons!
1.1.2 Precautions for antistatic
Movement and friction will both bring static electricity which causes serious damages to integrated
IC. Though static charge is little, when a limited quantity of electric charge is added to large-
scaleintegrated IC, as the capacitance is very small in the meantime, now the integrated IC is very much
easy to be struck through by static electricity or the performance will decrease. Thus static electricity
prevention is of extraordinary importance. The following are several measures to prevent static
electricity:
1. Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth,
and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity
device. The length and depth of the metal embedded under the earth should be determined according to
the wettability of the local soil. For humid places, it may be shorter, and longer and deeper for dry places.
If possible, it can be distributed and layed in terms of “#” shape.
2. On operating table-board, the antistatic table cushion should be covered and grounded.
3. All devices and equipments should be placed on the antistatic table cushion and grounded.
4. Maintenance personnel should wear antistatic wrist ring which should be grounded.
5. Places around the operating position should also be covered with electric conduction cushion or
Painted with antistatic paint.
1.1.3 Precautions for laser head
1. Do not stare at laser head directly, for laser emission will occur when laser head is working, which
will Hurt your eyes!
2. Do not use wiping water or alcohol to clean laser head, and you may use cotton swab.
- 1 -

1.1.4 About placement position
1. Never place DVD player in positions with high temperature and humidity.
2. Avoid placing near high magnetic fields, such as loudspeaker or magnet.
3. Positions for placement should be stable and secure.
1.2 Maintenance method
1.2.1 Visualized method
Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding,
rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of
elements appear. Check power supply of the machine and then use hands to touch the casing of part of
elements and check whether they are hot to judge the trouble spot. You should pay more attention when
using this method to check in high voltage parts.
1.2.2 Electric resistance method
Set the multimeter in resistance position and test whether the numerical value of resistance of each
point in the circuit has difference from the normal value to judge the trouble spot. But in the circuit the
tested numerical value of resistance is not accurate, and the tested numerical value of integrated IC's
pins can only be used for reference, so the elements should be broken down for test.
1.2.3 Voltage method
Voltage method is relatively convenient, quick and accurate. Set the multimeter in voltage position
and test power supply voltage of the player and voltage of a certain point to judge the trouble spot
according to the tested voltage variation.
1.2.4 Current method
Set the multimeter in current position and test current of the player of a certain point to judge the
trouble spot. But when testing in current method, the multimeter should be series connected in the
circuit, which makes this method too trivial and troublesome, so it is less frequently used in reality.
1.2.5 Cutting method
Cutting method should be combined with electric resistance method and voltage method to use.
This method is mainly used in phenomena of short circuit and current leakage of the circuit. When
cutting the input terminal voltage of a certain level, if voltage of the player rises again, it means that the
trouble lies in this level.
- 2 -

1.2.6 Element substitution method
When some elements cannot be judged good or bad, substitution method may de adopted directly.
1.2.7 Comparison method
A same good PC board is usually used to test the correct voltage and waveform. Compared these
data with those tested through fault PC board, the cause of troubles may be found.
Through the above maintenance method, theoretical knowledge and maintenance experience, all
difficulties and troubles will be readily solved.
1.3 Required device for maintenance
Digital oscillograph ( 100MHE)
TV set
SMD rework station
Multimeter
Soldering iron
Pointed-month pincers
Cutting nippers
Forceps
Electric screw driver
Terminals connecting cord
Headphone
Microphone
- 3 -

ChapterTwo
FunctionsandOperationInstructions
2.1Features
Formats:
Audio:
Video:
Miscellaneous:
#DigitalvideoplaybackofDVD-Video,SuperVCDandVCDformats
#MPEG-4compatibility:playbackofDivX3.11,DivX4,DivX5,DivXProandXviDformats
#PlaybackofmusicdiscsinDVD-Audioformat
#PlaybackofmusicalcompositionsinCD-DAandHDCDformats
#PlaybackofcompressedmusicalfilesinMp3andWMAformats
#Playbackofkaraoke-discsinDVD,VCDandCD+Gformats
#Playbackofphotoalbums,recordedinKodakPictureCDandJPEGdigitalformats
#192KHz/24bitaudioD/Aconverter
#Coaxialandopticalaudiooutputs,providingdigitalsoundplaybackinDolbyDigital/DTS/LPCM
formats
#PlaybackofmusicdiscsinSACDformat
#Coaxialandopticalaudioinputs,providingconnectionofexternaldigitalsignalsources
#StereophonicaudiooutputforconnectiontoTVandamplifier
#Integrateddigitalmulti-channelsounddecoders,providingplaybackofDolbyDigitalandDTS
audiotracks
#IntegratedDolbyProLogiclldecoder,providingtransformationofstereophonicsignaltomulti-
channelone
#Microphoneinputprovidingkaraokefunctions
#108MHz/12bitVideoD/Aconverter
#Progressivescan(YPbPr)videosignaloutput,securinghighresolutionandabsenceofimage
flicker
#Compositeandcomponent(YCbCr),S-VideoandRGB/SCARTvideooutputs,providing
advancedswitchingcapabilities
#NTSC/PALtranscoder
#Supportofmanycameraangels,dubbedlanguagesandsubtitles
#Sharpness,Gamma,Brightness,Contrast,HueandSaturationadjustment
#SupportofCD-R/CD-RW,DVD-R/DVD-RW,DVD+R/DVD+RW
#FM/AMtunerwithRDSsupport
#USBport,providingplaybackoffilesofsupportedformatsfromexternalflash-memorydevices
#KARAOKE+,providingextendedkaraokefeatures
#Easytouseon-screenmenuinRussian
#SupportofRussianfilenames,Id3tagsandCD-text
#”Memory”functionwhichcanloadthelastdiscpositiononstop
#”Capture”function,autoloadingselectedbookmarkedimageasthewallpaper
#Q-Playfunctionthatwillbringyoutothemainmovietitleandskipunskippablecommercials
#Virtualcontrolpanelfunctionmakesyourcontrolofthedevicemucheasierwhenplayingthe
movie
#Browserfunctiondisplaysinformationaboutplaybackmodes
#AutoprotectionofTVscreen
#Childlock,parentalcontrol(protectionagainstplayingundesirablediscs)
-4-

STANDBY/POWERbutton
Presstoswitchthedeviceon/intostanby
OPEN/CLOSEbutton
Presstoopen/closethedisctray
HDMIButton
SwitchHDMIoutputresolution
PLAY/PAUSEbutton
Presstoplayback/pause
STOPbutton
Presstostoptheplayback
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REWbutton
Presstofastreverse/radiostationtuning.
FWD-button
Presstofastforward/radiostationtuning.
VFDdisplaywindow.
Disctray.
VOLUMEadjuster
Presstoadjustvolume
USBport
Microphoneinput.
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HDMIoutput
ComponentvideooutputYCb(Pb)Cr(Pr)
Compositevideooutput
S-Videooutput
FMAntennainput
AMAntennainput
SCART-typeAVconnector
Coaxialdigitalaudiooutput
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Opticaldigitalaudiooutput
Opticaldigitalaudioinput
Coaxialdigitalaudioimput
Audioinput
Stereophonicaudiooutput
Leftfrontspeakerinput(outputfromthe
build-inamplifier)
Rightfrontspeakerinput(outputfromthe
build-inamplifier)
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2.2Controlsandfunctions
2.2.1Frontpanelcontrols
2.2.2Rearpanelconnections
-5-

Centerspeakerinput(outputfromthe
build-inamplifier)
Subwooferinput(outputfromthebuild-in
amplifier)
CD-,VCD-orSVCD-disc
DVD-disc
AM/FM
Radiotuningmode
Tunermode
Stereo
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LeftSurroundspeakerinput(outputfrom
thebuild-inamplifier)
RightSurroundspeakerinput(outputfrom
thebuild-inamplifier)
DolbyDigital
Programmedradiostation
Friquency
Playbacktime
Chaptersortracks
Playbackorpause
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2.2.3VFDdisplaygeneralview
2.2.4Remotecontrolgeneralview
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EJECTbutton
DVDbutton
AUDIObutton
DISPbutton
LANGbutton
SLEEPbutton
Q-PLAYbutton
EQbutton
BASS+/-button
Presstoopen/closethedisctray.
PresstoswitchtoDVDmode.
Presstoswitchtoaudioinputmode.
Presstodisplaythediscinformation.
Presstochangethelanguage.
Presstoturnthesleepmodeon.
PresstoturntheQ-Playmodeon.
Presstoadjusttheequalizer.
Presstoadjustthetone.
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BOOSTbutton
Presstobassboosting.
BROWSERbutton
Presstoturnon/offthebrowserfunction.
JOGDIALwheel
Functionsaresetmanually.Default
function:ZOOM.
SETUPbutton
Presstoswitchtosetupmode.
Button
Presstocaptureandbookmarkimagefor
thewallpaper.
Buttons
Presstostartreverseorforwardscanning.
SKIP/PRESET+/-
Presstoswitchbetweenfilesondisc/tuned
radiostations.
A-Bbuttons
Presstorepeattheselectedportion.
REPEATbutton
Presstorepeatplayback.
CH+/CH-button
Presstochangetheacousticchannel.
MUTEbutton
Presstoturnon/offthesound.
VOLUME+/-button
Presstoadjustthevolume.
SLOWbutton
Presstoswitchtoslowdowntheplayback.
PLAY/PAUSEbutton
PresstoPlay/pausetheplayback.
STOPbutton
Presstostoptheplayback.
Button
Presstoturnon/offthecirtualcontrolpanel.
CANCELbutton
Presstogoonelevelback/cancelcurrent
operation.
OKbutton
PressOKforconfirmationoruseitlike
joystickduringnavigatinginMENU.
MENUbutton
DVD-discmenu/PBCfunction.
GOTObutton
Presstoplaybackfromthetargetplace.
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Numericbuttons
ST/5.1button
PresstoswitchbetweenSTEREO/5.1CH.
TREBLE+/-button
Presstoadjustthetone.
ECHObutton
Presstoadjusttheechofunctionofthe
microphone.
MEMbutton
Presstomemorizethepointwhere
playbackwasstopped/playbackfromthe
previouslymemorizedpoint.
HDMIbutton
SwitchHDMIoutputresolution.
SUBTbutton
Presstochangethesubtitleslanguage.
ANGLEbutton
Presstochangethecameraangel.
RADIObutton
Presstoswitchtoradiomode.
KARAOKEbutton
Presstosetthekaraokefunctions.
USBbutton
PresstoswitchtoUSBmode.
Button
Presstoswitchthedeviceon/intostandby.
-7-
2.3.1Functionselectionand
change
2.3FUNCTIONSETTINGS
PresstheSetupkeytoshowthesetup
menu.Youwillseethefollowingimageonthe
screen,asshownonthefigure:
SelectthedesiredmenuitemusingtheJog
Dial;pressOKforconfirmation.
1.Forexample,ifyouwishtochangetheimage
settings,youhavetoselecttheImageitem
andpresstheOKorRIGHTkeyofthecursor
joystick.

2.UsingtheJogDial,selectthedesireditem
andpressOKorRIGHTkeyofthecursor
joystick.Forexample,selecttheSharpness
item.Settingswillappearonthescreen.Then
selectthedesiredsharpnesslevelandpress
OKforconfirmation.
3.PressLEFTkeyofthecursorjoystickforexit
topreviousmenulevel.
4.PressSETUPtoexitsetupmenu.
2.3.2Languagesettings
1.Menu:interfacelanguagesetup
#Options:Russian,English,Ukrainian,
Romanian.
#Defaultoption:Russian.
#Options:Off,Russian,
#Defaultoption:Off.
#Selectionofotherlanguages:selectthe
OTHERSitemusingtheJogDialandpress
OK.Enterthelanguagecodeusingnumeric
buttonsandpressOK.
#Ifthelanguageyouselectedisnotrecordedon
theDVD/MP4disc,anotheravailable
languagewillbedisplayed.
2.3.3Imagesettingsmenu
1.TVsystem:TVsystemselection
#Options:Auto,PAL,NTSC.
#Defaultoption:PAL
English,Estonian,
Latvian,Kazakh,Romanian,Belarusian,
UkrainianandChinese.
2.DVDmenu:selectionofdiscmenulanguage
3.Soundtrack:selectionoftranslationlanguage
4.5.DVD/MP4Subtitles:selectionofsubtitles
language
#Options:Russian,English,Estonian,Latvian,
Kazakh,Romanian,Belarusian,Ukrainian,
Chinese.
#Default:English.
#Selectionofotherlanguages:selectthe
OTHERSitemusingtheJopDialandpress
OK.Enterthelanguagecodeusingthe
numericbuttonsandpressOK.
#Ifthelanguageyouselectedisnotrecordedon
theDVDdisc,anotheravailablelanguagewill
beused.
-8-
2.TVFormat:imageratiosettings
#Options:4:3pan&scan,4:3letterbox,16:9TV
andWide/SQZ.
#Defaultoption:16:9TV.
#Somediscsarerecordedwithsupportofonly
oneratio.Theselectedratiomustcomplywith
theTVscreen.
3.Videooutput:selectionofvideosignal
#Options:Comp,SCART.
#Defaultoption:Comp.
4.Sharpness:imagesharpnessadjustment
#Options:High,Medium,Low.
#Defaultoption:Medium.
5.Gamma:adjustmentofimagecolor
temperature
#Options:High,Medium,Low,Off.
#Defaultoption:Off.
6.Brightness:adjustmentofimagebrightness.
7.Contrast:adjustmentofimagecontrast
8.Hues:adjustmentofimagehues.
9.Saturation:adjustmentofimagesaturation
Adjustmentofimagebrightness,contrast,hues
andsaturation:
#Selectthedesireditemoftheimageadjustment
sectionusingtheJogDial.PressOKorRIGHT
keytostartadjustingtherelevantoption.
#ChangetheoptionvalueusingtheJogDial.
#UponcompletionpresstheLEFTkeyofthe
cursorjoysticktoreturntoimagesetupmenu.

2.3.4Soundsettingsmenu
1.Mixer
A)Configuration:settingofthemodefor
conversionofthe5-channelsignaltostereo
signal
#Options:Stereo,5.1.
#Defaultoption:5.1..
#5.1modemustbesupportedbythedisc
Numberofmuicaccompanimentchannels
dependsonthespecificdisc.
#Adjustmentofthecentralspeakerandsurround
speakersisavailableonlyiftheConfiguration
optionissetto5.1position.
B).Stereomix:playbackset-upwhileplayingthe
discwithtwoindependentaudiochannels.
#Options:L+R,L,R.
#Defaultoption:L+R.
C)Surr.Mix:set-upofsurroundoptionswhile
playingthestereodisc.
#Options:Off,sum,Virt.Surr.
#Defaultoptions:Off.
D).Lowband:distributionoflowfrequencies
throughchannels.
#Options:FrontF,CenterC,SurroundSr,
SubwooferSW.
#Defaultoptions:FrontF,SubwooferSW.
#Ifyouwantthelow-frequencycomponentofthe
soundsignalenteronlythesubwooferchannel,
selectandconfirmtheparameterSubwoofer
SW.
E.Channelsettings:separateadjustingof
volumebychannels.
#Selectthechannelyouwant.
#Adjustthesoundvolumeofeachchannelusing
thewheel.
#PresstheOKtoreturntosoundsettingsmenu.
-9-
F)Delayofthechannel:set-upofsignaldelayin
speakerchannels(central,rearandsubwoofer).
#UsingtheJogDial,selectthechannel,for
whichyouwanttosetupthedelay,andpress
OKforconfirmation.
#UsingtheJogDialsetupthedesireddistance
fromthelistenertoeachspeaker(detailed
descriptionofthisoperationseeonpage43)
#PressLEFTkeyofthecursortoreturnto
speakerconfigurationmenu.
G).PROLogicll:functionofstereosound
conversionto5-channelssound.
#Options:On,Off,Auto.
#Defaultoption:Off.
#InAutoposition,theDVDplayerdetermines
itself,whentousethePROLogiclldecoder.
Somediscsdonotsupportthisfunction.
2.Digitalaudiooutput
A)SPDIFformat:set-upofdigitalaudiooutput
options.
#Options:RAW,PCM.
#Defaultoption:RAW.
#WhenyouselecttheRAWoption,thenot
decodedsignalistransferredtotheDVD
receiver’sdigitaloutputs,thedecodedsignal
istransferredtoanalogoutputs.Decodingis
performedbythebuilt-indecoderoftheDVD
receiver.
Thisfeatureismeanttoensurethatsignal
decodingatdigitaloutputsisperformedbyan
extermaldevice(e.g.anamplifier).
#IfyouselectthePCMoption,aPCMcoded
signalwillbetransferredtotheDVDreceiver’s
digitaloutputs.
B)LPCM:set-upofdigitalaudiooutputoptionsto
complywithdifferentampllfiersandrecelvers.
#Options:48kHz16bit,96kHz24bit,192kHz
24bit.

2.VCD/SVCD
PBSmenu:PBCmenuon/off
#Options:On,Off.
#Defaultoption:On.
#Ifonoptionisset,whilereproducingdiscs,a
menuwillappear,inwhichyoucanselectthe
orderofplayingthedisccontent.Iftheoff
optionisset,thereproducingofcontentis
performedintheorder,inwhichitisrecorded
onthedisc.
3.SACDPriority:SettingSACDmode
#Options:Multi-channel,2-channel,CDmode.
#Defaultoption:Multi-channel.
4.Files:selectionforeproducedfilesonthedisc.
#Options:Audio,Pictures,Video,Alltypes.
#Defaultoption:Alltypes
5.Repeat:filerepeatmode
#Options:Off,Single,All.
#Defaultoption:Off.
6.Loadeffect:typeoftransitionfromoneJPEG
filetoanother
#Options:Off,fromtop,frombottom
#Defaultoption:Off.
2.3.6Karaokesettingsmenu
1.Microphone:microphoneon/off
#Options:Off,On.
#Defaultoption:Off.
2.Kar.Help:karaokediscplaybackmode
#Options:LChannel,RChannel,Noast,Novoc.
#Defaultoption:Novocalmode.
#Defaultoption:48kHz16bit.
3.Soundcorrection
A)equalizer:equalizermodes
#Options:Rock,Pop,Live,Dance,Techno,
Classic,Soft.
#Defaultoption:Off.
B)Echo:echoeffects
#Options:Off,Concert,Livingroom,Hall,
Bathroom,Cave,Arena,Church.
#Defaultoption:Off.
C)Tonebalance:adjustmentoftonebalance
level.
#AdjustthetonebalancelevelusingtheJogDial.
#PresstheLEFTkeyofthecursorjoystickto
returntosoundcorrectionsetupmenu.
4.HDMIAudio:Toselectdigitalaudiooutput
fromtheHDMIport.Theoptionsare:
#Options:LPCM,AUTO,OFF
#Defaultoption:OFF.
5.SACDOutput:TOselectaudiooutputformat
forSACD
#Options:PCM,DSD
#Defaultoptions:PCM.
2.3.5Playbacksettings
1.DVD
Advertisementskip:skiptheunskippableblock
whileplayingaDVDdisc
#Options:Yes,NO
Defaultoption:NO
-10-
Advertisement No
3.Volume:
Microphone:microphonesoundvolumelevel
#UsingtheJogDialadjustthemicrophone
volumelevel.
#PressLEFTkeyofthecursorjoysticktoreturn
tokaraokesettingsmenu.
4.Echo:echolevelwhileplayingthekaraoke-
disc
#AdjusttheecholevelUsingtheJogDial.
#PressLEFTkeyofthecursorjoysticktoreturn
tokaraokesettingsmenu.
2.3.7Preferencesettings
1.Backlight:SelectionofVolumeadjusterLED
#Options:On,Off.
#Defaultoption:On.
2.Gr.Equalizer:spectrumanalyzer
#Options:On,Off.
#Defaultoption:Off.

2.3.8ParentalControl
1.Category:setupofagerestrictionstoprevent
childrenfromseeingundesirablediscs.
#Options:Any,Kid,G,PG,PG-13,PGR,R,NC-
17.
#Defaultoption:Any.
2.Setpassword:setupofafour-digitpasswordto
changethelevelofagerestrictions.
#Defaultoption:7890.
3.Background:selectionofandimageasTV
screenwallpaper
#Options:Standard,Saved
#Defaultoption:Standard.
4.Screensaver:screensaveron/off
#Options:On,Off.
#Defaultoption:On.
5.JogDial
#Options:Zoom,Step,Fast,Skip,Volume.
#Default:Zoom.
2.3.9Initialsetupmenu
#PresstheRIGHTkeyofthecursorjoystickto
entertheinitialsetupmenu,thenselectthe
desireditemusingtheJogDialandpressOK
keyforconfirmation.
#Whilebeinginthismenusection,youcannot
returntothepreviouslevelbypressingthe
LEFTkeyofthecursorjoystick.
2.3.10Resettodefaults
#Resettingallsettingsandrestoringdefault
options,exceptagerestrictionsleveland
password.
2.3.11Exitsettingsmenu
#SelecttheexititemusingtheJogDialandpress
theOKtoexitthemenu.
2.3.12Channeldelayset-up
Set-upoftimedelayinthesurroundchannel
Usually,timedelayintheDolbyDigital
decodingsystemispresettoensurebesteffect
whileinstallingtheHomeTheater.However,in
caseyouwishtoadjustyoursystemmore
precisely,pleaseconsultinstructionsgivenin
thismanual.Setupoftimedelayforthisdevice
ispossibleinbothDolbyDigitalandDolbyPro
Logicmodes.
Tosetthedesireddelayyouhavetoknow
thedistancefromtheplacewhereyouare,tothe
frontspeakersandSurroundspeakersasshown
inFig.1.ConsultFig.2(DolbyProLogicmode)
and3(DolbyDigitalmode)inordertodetermine
thedistancetoSurroundspeakers(axisYinthe
figure)andthedistancetothefront
speakers(axisXinthefigure).Crossingpointof
thosetwolinesonthechartwillgivethe
recommendeddelayvalue.
-11-
Fig.1.TakeintoaccounttheA-Bdistance;useboth
figuresforsettingthedesiredtimedelay.

2.3.13“Night”mode
TheDolbyDigitalsystemprovidesan
extremelybroaddynamicrangeofplayback
sound-fromgentletoroaring.Itcreatesthe
presenceeffect,especiallywhileseeingmotion
pictures.However,atnightapowerfulsound
withabroaddynamicrangemaygivepleasureto
you,butdisturbandannoyyourfamilyand
neighbors,ifyoujustdecreasethevolume,you
willimmediatelynoticethatyouceasedtonear,
e.g,dialoguesasclearasyoudoatnormal
volume,andsuchsoundeffectsasrustle,
whisperetc.Havemerelydisappeared.Toavold
this,youjusthavetodecreasethevolumeof“
loud”soundsbysimultaneouslyincreasingthe
volumeof“soft”soundswiththevolumeof
“average”soundsleftunchanged,l.e.Just
decreasethedynamicrangeofsoundcontrol.It
usestheprincipleofcompressingtheacoustic
signal’sdynamicrangewhilerecording;
therefore,whileplayingandinverse
transformation(volumeexpansion)takesplace.
Thisiscalled”night”mode.Theregulationlimits
arerestricted,however,toavoiddistortionsof
resultantsignal.
Set-upoftimedelayinthecentralchannel
Sometimesseveralpeoplearelisteningto
themusic,andthespaceislimited.Inthiscase,
youcaninstallthreespeakers(twofrontones
andacentralone)asshowninFig.1.Withthe
distancetothelistenerbeingapproximatelythe
same.Thecentralchanneldelayistobeset
at”0”.Shouldthecentralspeakerbeinclose
proximitytoleftandrightfrontspeakersas
showninFig.2,orthecentralspeakerbenearer
tolistenerswhencomparedwithfrontspeaker’s
location,orthecentralspeakerbenearertothe
listenerby1foot,inallthesecasesyoumayset
thedelayvalueforthecentralchannelat1ms.
Forinstance,asshowninFig.2,ifthelineC
isby1footshorterthanthelinesRandL,the
delayvalueistobesetat1ms,Ifyoursofais
broadenough,andthereareseverallisteners
sittingonit,itmakessensetolocatethe
speakersinoneline,asshowninFig.3withthe
delayvalueofthecentralchanneltobesetat”0”.
Finally,ifitwillbenecessarytoinstallthe
centralspeakerbehindtheleftandrightfront
speakers,thedelayvalueshallbesetat“0”.
Fig.1.Delayofcentral
channel=0
L=R=C
Fig.2.Smallarea
Delayofcentralchannel
=L=(orR)-C
Fig.3.Smallarea
Delayofcentralchannel=0
L=RC
-12-
Fig.2.Determinedelay
valueastoDolbyProLogic
mode.
Fig.3.Determine
delayvalueastoDolby
Digitalmode.

2.4.1Usefulnotes
2.4.2Troubleshooting
2.4MISCELLANEOUS
#ToextendtheservicelifeofyourDVDreceivermakepausesofnotlessthan30secondsbetween
switchingoffandrepeatedlyswitchingontheDVDreceiver.
#DisconnecttheDVDreceiverfromthewalloutletaftershutdown.
#SomeDVDreceiver’sfunctionsmaynotbeappliedtosomediscs.
#Usesupplysourcesofratedvoltage,otherwisetheDVDreceivermaynotfunctionorbe
damaged.
#IncaseoftheDVD-receiver’soccasionalstops,pleaseswitchthepowersupplyoffandthenon
again.
Pleasecheckprobablecausesofmalfunctionbeforeaddressingtheservicecenter.
DolbyDigitalDolbyPro Logic surround
RearchannelStereo 20 Hz-20 kHzMono channelwithlimited frequency
range(100Hz-7kHz)
Low-frequency
channel(subwoofer) Available,20-120 HzN/a
Sound field distribution MuitivariateFromleft toright, fromright toleft, from
front torear, fromreartofront
Channels6independentchannels,each
reproducing itsownsignalatatime4segmented channels.Onlyone channel isdecoded atatime.
Createsan optimumsound fieldwith
illusion ofan equaldistancefromlistener
to eachspeaker.
The mostcost-efficientwayto ensure
high-quality surround effect.
Allowsadjusting the decompression
degree ofsound infromation("night"
mode).
Surround sound maybe received from
any signalsource.
Possibilityofprogrammablecontrolof the
decodertotransferbassesintolow-
frequency channel insystemsequipped
with broad-band speakersand a
subwoofer.
Compatiblewith existiing and futuretwo-
channel(stereo)formats.
Undoubted progress insound recording
technology,especiallyimportant for
programdirectors, filmdirectors,sound
engineersand actors.
Big progress incomparison with
conventionalstereo, the world'smost
popularsurround format.
Miscellaneous
-13-

Sign of troubleCause of troubleActionsto eliminatethe trouble
Nosound 1.Pooraudiocableconnection 2.Disc dirtyordamaged.
3.Sound disabled bythe MUTEbutton.
1.Make properconnection.
2.Clean the disc.
3.Press the MUTEbutton.
Noimage
1.Poorvideo cableconnection.
2.IncorrectsettingsofyourTVset.
3.The DVDreceiver'sisinthe progressive
scan mode whileyourTVsetdoesnot
support thismode.
1.Make properconnection.
2.Correct the settingsofyourTVset.
3.Placethe DVDreceiverinthe interlaced
scan mode through the DVD-receiver's
menu.
Black and whiteimage 1.IncorrectTVcolorsystemselected. 2.Colorlevelon the TVsetadjusted
incorrectly.
1.Set the approprlatecolorsystemvlathe
menu:SETUP＞Image＞TVscan.
2.Readjust the colorsystemofyourTV
set.
Discs cannotbe read
1.Disc notinserted.
2.Disc inserted incorrectly.
3.Condensate on the DVDreceiver's
laserhead.
1. Insert the disc.
2.Install the disc withthe labelside facing
up.
3.Switchthe DVDreceiveron without
disc forand hour.
Microphone doesnot
operate
1.Microphone isunplugged.
2.Lowlevelof the microphone's sound
volume.
1.Connect the microphone.
2.Adjust the levelof the microphone's
sound volume.
Remotecontroldoes
notoperate
1.Remotecontrol isincorrectlydirected at
the DVDplayers's screen.
2.Distancetothe DVDreceiverisin
excess of8meters.
3.Run outbatteries.
1.Usethe remotecontrolaccording tothe
manual.
2.Decreasethe distancetothe DVD
receiver.
3.Replace both batteries.
Somefunctionsdo not
work
1.Disc isrecorded incorrectly.
2.Incorrectkey sequence.
3.Static voltage on the DVDreceiver's
housing.
1.Wait5-10 secondsand the DVD
receiverwill automaticallyreturnto normal
state.
2.Repeat the operation one moretime.
3.Switchthe DVDreceiveroff for1-2
minutesand then switchiton again.
Unstableimage 1.IncorrectTVsetsettings.1.Correct the TVsetsettings.
-14-

3.1.1 Brief introductions of function
This player adopts brand new model with new generation DVD decode chip. With built-in Dolby
decoder and HDMI high definition decoder, vivid surround sound system, supporting 1080I high
definition format output, it brings you personal theater effect. It has features as follows:
Progressive scanning output to produce steadier and clearer pictures
5.1 CH output with optical, coaxial and HDMI output
HDMI high definition output with composite video, S video and component video output
Digital picture adjustment to the sharpness, brightness, contrast, chroma and saturation of
pictures, gamma correction
Karaoke Mix function
Frequency/amplitude digital tunning functions to memory FM/AM broadcasting stations 20 for
each
Power amplify adopts high performance large power IC with perfect protection function and
acoustic quality.
USB2.0 jack connects USB facility directly
3.1.2 Block diagram principle of player
This player is composed by decode&amplify board, panel, MIC board, tuner, power board and
loader. As it is shown in figure 3.1.2.1, all other signal flow is shown except for power board. The main
function of loader is to read disc information and send it to MT1389 which finishes servo function
together with AM5888 on decode board and other aided circuits. Also it ensures normal working of
loader with other circuit. FLASH on decode board is to store system programme, while SDRAM is to
store programme when player is working and read acoustic image information from disc to ensure a
smooth output. Amplifier board is mainly to take audio DA switch, analog signal amplifying and output
5.1CH to ensure normal working of external speaker. AV board is mainly to output various of audio and
video signal. This player has external sound input, which can be amplified through amplify circuit of this
player to convenient output to speaker. AFM-203KF digital tuner enables player to have tunning function
Chapter Three Principle and Troubleshooting
Section One Player principle
- 15 -

Figure3.1.2.1 Block diagramofthe player
MT1389S
Loader
16M ROM
Loader driving
Video output
Electronic switch
4052
TUNER
AUX_IN
Karaoke
Buffering amplify
4558
DSP processing
TAS5508PAG
Filter/Amplify
TLV272
L
R
C
SL
SR
VFD driving
button scanning
TP6317
VOL/JOG
Potentiometer
Remote control
recriver
REMOT
FL/FR/C
Power amplify
TAS5112DFD
SL/SR/SW
Power amplify
TAS5112DFD
Low pass 3
Low pass 3
Power supply
MIC1/MIC2
MIC
AUXL/AUXR TU_L/TU_R
FL/FR/C
SL/SR/SW
SW
IR
J3
J4
3.3V
P+28V
A5V/3.3V
P+28V
Matched impedence
47K
Optical/coaxial
input
I/O expand
PCF8575DW
RDS_MPX
Digital audio
receiving Cs8415A
AUDIO ADC
CS5340
L/R
RDS decode
Pt2597
RDDA
QUAL
RDCL
SDA_DA
Composite video Progressive/comp
onent output S terminal SCART L/R OUT Optical/coaxial
output HDMI output
VIDEO_COMP Cr/Pr
Cb/Pb
Y
VIDEO_COMP
VIDEO_C
VIDEO_Y
VIDEO L/R ROUTX
LOUTX
SPDIF TX2+
TX2-
TX1+
TX1-
TX0+
TX0-
TXC+
TXC-
HDMI SCL
HDMI SDA
HPD
USB_CE
INT
SCMUTE
USB_CON1
USB_CON
8415_RST
5508_RST
HSYNC
VSYNC
VDATA3
AUIN_SL1
AUIN_SL0
AUDIO_RST
PMW_RL+
PMW_RL-
PMW_RR+
PMW_RR-
PMW_H_PL
PMW_H_ML
PMW_H_PR
PMW_H_MR
SDOUT
servo driving
AM5888S
SDRAM
64M
Focus, track
feed, main axis
Digital servo processing
MPEG Decode
AUIN_SL0/AUIN_SL1
SCL
SDA
DGND
FL+
FL-
-21V
CPU5V
STBY
A+9V
A+5V
AGND
A-9V
DGND
D+5V
AGND
P+28V
PGND
KA1M0880BTU
NCP1200P60
CLK
STB
SDA
CLK
STB
SDA
IR
DGND
FL+
FL-
-21V
CPIU5V
STBY
ASDAT0
ASDAT1
ASDAT2
SBCLK
SLRCK
SDA_AD
SDA_LR
SDA_SLSR
SDA_CSW
LRCK
SLCK
SDA_AD
SACLK MCLK
VAILD/SD
PWM_FL
PWM_FR
PWM_C
PWM_SL
PWM_SR
PWM_SW
- 16-