BBK DV725SI User manual

servicemanual
DV725SI

Catalog
1.1Safetyprecautions
1.1.1Powersupply
1.1.2Precautionsforantistatic
1.1.3Precautionsforlaserhead
1.1.4Aboutplacementposition
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
2.2.1FrontPanelIllustration
2.2.2RearPanelIllustration
2.2.3LEDDisplayWindowIllustration
2.2.4RemoteControlIllustration
2.3Accessories
2.4FUNCTIONSETUP
2.4.1FunctionSetup
2.4.2Language
2.4.3Image
2.4.4Sound
2.4.5Playback
ChapterOneAboutMaintenance 1
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2.4.6Karaoke
2.4.7Preference
2.4.8Parentalcontrol
2.4.9Initialsetup
2.4.10Resttodefaults
2.5Specifications
ChapterThreePrincipleandServicing
SectionOnePrincipleofthePlayer
3.1.1Blockdiagramoftheplayer
3.1.2PCBboardblockdiagramoftheplayer
3.1.3IntroductiontoICusedbythisplayer
SectionTwoUnitCircuitPrinciple
3.2.1Briefintroductiontoloader
3.2.2Servocircuit
3.2.3Laserpowercontrolcircuit
3.2.4CD/DVDconversioncircuit
3.2.5Discin/outcircuit
3.2.6Mainaxiscontrolcircuit
3.2.7Decodecircuit
3.2.8Resetcircuit
3.2.9Videocircuit
3.1.13AVoutputboardcircuit
3.2.14MICcircuit
3.2.10Audiocircuit
3.2.11Mutecircuitandpower-offquietingcircuit
3.2.12Cardreadcircuit
3.2.15Headphonecircuit
3.2.16Controlpanelcircuit
3.2.17Powercircuit
SectionThreeServicingCases
3.3.1Servicingcases
3.3.2Troubleshootingflowchart
SectionFourWaveformdiagram
SectionFiveFunctionIntroductiontoIC
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3.5.2functionintroductiontoFLASH
3.5.3functionintroductiontoSDRAM
3.5.4functionintroductiontoD5954
3.5.5functionintroductiontoCs4360
ChapterFourDisassemblyandAssemblyProcess
ChapterCinquePCBboard&Circuitdiagram
SectionOnePCBboard
SectionTwocircuitdiagram
3.5.6functionintroductiontoCs5340
3.5.7functionintroductiontoU209(LM1117MP-1.8)
3.5.8functionintroductiontoHS0038A2
3.5.9functionintroductionto4558/4580
3.5.10functionintroductiontoTDA1308
3.5.11functionintroductionto24LLC020
3.5.12functionintroductiontoFDSH321
3.5.13functionintroductiontoLM431A
3.5.14functionintroductionto2501
ChaptersixBOMList
3.5.1functionintroductiontoMT1389HD 59
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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.
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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
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ChapterTwo
FunctionsandOperationInstructions
2.1Features
2.2ControlButtonLocationsandExplanations
ThisplayerhasemployedthenewgenerationDVdecodechipwithbuilt-inDolbyDigitaldecoder
whichwillbringyoutoabrand-newAVententainmentworld.The2-lasersupererror-correction
mechanismsupportsCD-R.
1.CompatiblewithDivX,MPEG4discstoproducewonderfulpictures.
2.108MHz/12bitvideoDAC,withmorevividandbrilliantpictures.
3.Progressive-scanvideooutputstoeliminatetheflickershardlyouvercomebyinterlacingscan
andthereforeyoureyesightwillbewell-protected.Atthesametime,thepicturesdeflnltionIssharply
enhancedandthepictureswillbefiner,smootherandstabler
4.Brightness,chromaandcontrastadjustmentfunctionstorenderyoureyesmorecomfortable.
5.DigitalechoKaraoketoenableyoursingingeasier.
6.CompositeVideo,S-VideoandComponentVideooutputs.
7.Bullt-InDolbyDigitaldecoder,separate5.1ChOutputs.
8.Dolbyoutputfor2channel(DOWNMIX)
9.DVD-Audiodecodingoutputtoreproduceoriginalandrealisticsoundeffects.
1.OpticalandcoaxialoutputsforDigitalaudio.
2.DTS,DoblyDigital,PCMDigitalaudiooutputstosatisfytheFans’Ssacousticrequirements.
1.Screensaverprotectsyour TVsetcarefully.
2.ThenovelMp3playbackwindowGUIprovidesyouanewwaytoappreciateMp3music.
3.Multi-angleplaybackfunctionmakesitpossibleforyoutoviewascenefromdifferentcamera
angles.
4.It’spossibletoselectthedesiredbeginning,developmentandendingofastory.
5.Directentryintodesiredscenes(title/chapter/tracksearch).
6.Zoomingfunctiontozoomupanyplayingpicture.
7.CapableofplayingPAL/NTSCdiscs.
8.MultipleaspectratiostofitTVsetsofvariousscreenratios.
9.Parentallockfunctiontopreventchildrenfromwatchingunsuitablediscs.
10.Multipledubbinglanguagesandsubtitlelanguagesbringyouthebestentertainmentstatusall
thetime.
NOTE:DivXversionisstillupgradingcontinuouslyandthelatestversionofthisunitisDivX5.1.
SomediscslabelledwithMPEG4onthemarketactuallyareothers,withwhichareuncompatible.
Pleasetakecarewhenbuyingdiscs.
Brand-newAVEffects
HighQualityDigitalAudio
ManyConvenientFeatures
SuperCompatibilitywithsuperVCD,VCD,CD,CD-R,MP3,HDCD,KODAKPICTURECDetc.
2.2.1FrontPanelIllustration
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44 56 7 8 9
10 11 12 13
1POWERswitch
IRSENSOR
Displaywindow
Powerindicator
Disctray
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3
4
5
6
7
PREVbutton
PAUSEbutton
NEXTbutton
SlotflapforUSB
8
9
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12
13
OPEN/CLOSEbutton
PLAYbutton
STOPbutton
Pushbutton
2.2.3LEDDisplayWindowIllustration
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5 6 8
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ＭＰ３
64 75
2 3
2.2.2RearPanelIllustration
MixedAudiooutjack
5.1CHAudioOutjack
VideoOutjack
S-Video
VideoComponent/YPbProutjacks
DigitalAudioCoaxialOutjack
DigitalAudioOpticalOutjack
SCARToutjack
1
2
3
4
5
6
7
8
Play
Playbacktime
DVDdisc
Pause
CDdisc
Mp3disc
VCDdisc
1
2
3
4
5
6
7
2.2.4RemoteControlIllustration
Button
Openorclosethedisctray.
LANGButton
Changetheaudiolanguageoraudiochannel.
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MEMORYButton
Savetheplayingpointorjumptothesavedpoint.
DISPButton
Displayorhidediscinformation.
NUMBERButtons
BROWSEButtons
switchnewuserinterface.
CURSORButtons
SETUPButton
FunctionSetup.
Button
Open/closethevirtualkeyboardfunction.
KARAOKEButton
Karaokeoperationmenu.
Button
Fastbackwardplay.
Button
Skipbackward.
PEPEATButton
Repeatplay.
A-BButton
Repeattheselect.
Button
Pressoncetostandby,Presstwicetoplay.
SUBTButton
Changesubtitlelanguage,SwitchJPEGdisplay
mode.
Q-PLAYButton
Skiptheadvertisement/warningandplaytheDVD
directly.
ANGLEButton
Changecameraangle,MP3/JPEGplaybackmode
switch.
MENUButton
DisplayDVDmenuoropen/closePBC.
OKButton
CancelButton
ZOOMButton
Zoomin/outthedisplayedframe.
Button
Playorpauseplayback.
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Button
Fastbackwardplay.
Button
Stopplayback.
Button
Skipforward.
USBDVDButton
VOL+/-Button
Increase/decreasevolumelevel.
MUTEButton
Pressoncetomute,twicetounmate.
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2.3Accessories
AUDIO/VIDEOCORD
REMOTE
AAASITEBUTTERIES
WARRANTYCARD
USERMANUAL
KARAOKEDISC
1PCS
1PCS
2PCS
1PCS
1PCS
1PCS
Setupmenu
DVDmenu
Soundtrack
Subtitle Off
Language
Image
Sound
Playback
Karaoke
Preference
Parentalcontrol
Initialsetup
Resettodefaults
Exit
Setupmenu
DVDmenu
Soundtrack
Sbutitles Off
Russian
English
Ukrainian
High
Medium
Low
TVsystem
Videoout.
TV
Sharpness
Gamma
Brightness
Contrast
Hue
Saturation
TVscanmode
format
AUTO
S-Vid.
LB
L.
Off
0
0
0
0
IS
TVsystem
Videoout.
TV
Sharpness
Gamma
Brightness
Contrast
Hue
Saturation
TVscanmode
format
AUTO
S-Vid.
LB
L.
Off
0
0
0
0
IS
AUTO
PAL
NTSC
2.4FUNCTIONSETUP
2.4.1FunctionSetup
1.Pressthe[SETUP]buttonandthescreen
displaystheselectionmenuoffunctionsetup
2.Pressthe[CURSOR]buttontoselectthemenu
tobeenteredandpressthe[OK]orbuttonto
confirm.Orpressthe[CURSOR]buttontoExit
itemandthenpressthe[OK]buttontoexit.
3.Press[UP/DOWN]arrowtoselectthedesired
itemyouwanttosetandpress[OK].
Forexample,press[UP/DOWN]arrowsto
selectIMAGEandpress[OK].TheImage
settingpageappearsonthescreen.
4.Press[UP/DOWN]arrowtoselectthe
SHARPNESSitem.Press[OK]toconfirmit.
Andthenpress[UP/DOWN]arrowtoselectthe
desiredvalus.Forexample:Press[UP/DOWN]
arrowtoselect“Medium”,thenpress[OK],the
TVscreendisplay.
5.Press[LEFT]buttonifyouwanttoreturnto
theprevioussetuppage.
6.Press[SETUP]toexitthesetupmenu.
2.4.2Language
1.Setupmenu:Thisitemisusedtosetthe
promptslanguageonthescreen.
Optionalsetting:Russian,English,Ukrainian.
Default:English.
2.DVDmenu:Tosetthepreferencediscmenu
langwhenplaying.
Optionalsetting:
Default:English.
3.Sountrack:Tosetthepreferenceaudio
languagewhenplaying.
Optionalsetting:
Default:English.
4.Subtitles:Tosetthepreferencesubtitle
languagewhenplaying.
Optionalsetting:Off,
Default:Off.
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◆2.4.3Image
Russian,English,Estonian,
Latvian,Kazakh,Romanian,Byelorussian,
Ukrainian,Chinese,Others.
Russian,English,Estonian,
Latvian,Kazakh,Romanian,Byelorussian,
Ukrainian,Chinese,Others.
Russian,English,
Estonian,Latvian,Kazakh,Romanian,
Byelorussian,Ukrainian,Chinese,Others.
TVsystem
Videoout.
TV
Sharpness
Gamma
Brightness
Contrast
Hue
Saturation
TVscanmode
format
AUTO
S-Vid.
LB
L.
Off
0
0
0
0
IS
AUTO
PAL
NTSC
1.TVsystem:Thisitemisusedtothevideo
outputsystemofthisunit.
Optionalsetting:Auto,PAL,NTSC.
Default:AUTO.
2.TVscanmode:Toset .
3.Videooutput:TosetthetypesofSCARTout
connector.
◆
◆Progressivescan,
Interlacedscanmode
Optionalsettings:Progressive,Interlaced
Default:Interlaced.
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1.Mixer...
Mixer...
Digitaloutput
Tuning
Configuration
Stereomix
Surr.Mix
Lowband
Channels
Delays
PROLogicII
St.
L+R
sum
FSW
Off
Stereo
5.1
Configuration
Stereomix
Surr.Mix
Lowband
Channels
PROLogicII
Delays
St.
L+R
sum
FSW.
Off
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Optionalsetting:S-Video,Component,SCART.
Default:Component.
WhenusingRGBoutputsfromtheSCART
interface,pleaseselectRGB.Otherwise,
pleaseselectCom-ponent,andwhenusingS-
VideooutputpleaseselectS-Video.
4.TVformat:Tosettheaspectratioofthis
player’soutputimage.
Optionalsetting:4:3Pan-scan,16:9letterb.,
16:9TV.
Default:16:9letterb.
5.Sharpness:Usedtosetthesharpnessofvideo
outputs.
Optionalsetting:High,Medium,Low.
Default:Low.
Optionalsetting:High,Medium,Low,Off.
Default:Off.
7.Brightness:Usedtosetthebrightnessofvideo
outputs.
8.Contrast:Usedtosetthecontrastofvideo
outputs.
9.Hue:Usedtosetthehueofvideooutputs.
10.
A.
B.
2.4.4Sound
6.Gammaemendation:Thisitemisusedtosetup
theGammavalueofvideooutput.
Saturation:Usedtosetthesaturationof
videooutputs.
Brightness,contrast,hueandsaturation
adjustingmeans:
Press[UP/DOWN]arrowinthevideosetup
menutoselectthedesireditemyouwantto
adjust.Press[OK]or[RIGHT]buttontoenter
theitem'sadju-stment.
Press[UP/DOWN]arrowtoadjustthesetting
value.
◆
A.Configuration:Tosetthisplayer’sDOWNMIX
modetochangemulti-channelaudiointotwo
channelaudio.
Optionalsetting:Stereo,5.1.
Default:Stereo.
B.Stereomix:Tosettheoutputmeansoftheleft
orrightaudiowhenplayingaDolbydiscwith
separatetwo-channelaudio.
Optionalsetting:L+R,L,R.
Default:L+R.
C.Surr.Mix:Tosetoutputmeansofthesurround
leftandrightaudiowhenplayingastereodisc.
Optionalsetting:Off,sum,Virt.Surr.
Default:Off.
D.Lowband:selectthechannelthatyoudesire
tooutputlowfrequencysignal.
Optionalsetting:FrontF,CenterC,Surround
Sr,SubwooferSW.
Default:FrontF,SubwooferSW.
E.Channels:
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◆Tosetvolumeofeachindividual
channel.
a.Press[UP/DOWN]navigationkeystoselect
CHANNELTRIM,thenpressthe[OK]or
[RIGHT]navigationkeytoselectENTER
SETUPPAGEasshownintheTVscreen:
16
Volume L
FRONT surround
RlrCenter SW
16 16 16 16 16 16
b.Press[LEFT/RIGHT]navigationkeystoselect
thedesiredchanneltoadjust.
c.Press[UP/DOWN]navigationkeystoraiseor
lowervolumeofthechannel.
d.Press[OK]or[LEFT]toreturntotheMix..setup
page.
F.Delays:TosetdelaytimeoftheCenter/
Surround/SubwooferSpeaker.
A.Press[UP/DOWN]navigationkeystoselect
DelaysinChannelsitem,thenpress[OK]or
[RIGHT]navigationkeyselectENTERSETUP
PAGEasshownintheTVscreen.
Center
LS/RS
Subwoofer 0cm
0cm
180cm
b.Press[UP/DOWN]navigationkeystoSelect
thedesireditemoupPress[OK]or[RIGHT]
buttontoentersetting.
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c.Press[UP/DOWN]navigationkeystoraiseor
lowervolume.
d.Press[OK]or[LEFT]toreturntotheDelaysin
channelssettingpage.
Optionalsetting:AUTO,On,Off.
Default:AUTO.
2.Digitaloutput:selecttosettheformatand
streamformofdigitalaudiooutput.
A.SPDIFformat:
Optionalsetting:RAWformat,SPDIF/PCM.
Default:RAWformat.
B.LPCM
Optionalsetting:48kHz16bit,96KHz24
bit.192kHz24bit.
Default:48kHz16bit.
3.Tuning:
A.Maxvolume:setthemaximumvolume.
B.Equalizer:TosetEqualizermodes.
Optionalsetting:Off,Rock,Pop,Live,Dance,
Techno,Classic,Soft.
Default:Off.
C.Echo:Tosetdifferentsoundfieldeffects.
Optionalsetting:Off,Concert,Livingroom,
Hall,Bathroom,Cave,Arena,Church.
Default:Off.
D.Tonebalance
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2.4.5Playback
G.PROLogicII:TosetPROLogicIItoONor
OFF.IftheTITLEdoesnotsupportthis
function,werecommendthatyousetthisitem
toAUTObecauseitwouldbecomeworseifthe
processingeffectswereaddedforcibly.
:tosetthetoneleveltomatch
yourdiapasonwhenyou'resinging
Methodtoadjusttonecontrol:
a.Press[UP/DOWN]cursorbuttonstoselect
"tone"iteminAudioSettingpage,andthen
press[OK]or[RIGHT]buttontoenter
AdjustmentMenu.
b.Press[UP/DOWN]cursorbuttontoadjust
settingvalue.
C.Press[OK]or[LEFT]buttontoreturntoAudio
◆
Settingpageafteradjustmentsaredone.
Microphone
Kar.help
Volume
Echo
On
Off
On
Noast.
5
5
Microphone
Kar.help
Volume
Echo
On
Noast.
4
Microphone
Kar.help
Volume
Echo
On
Noast
4
4
DVD
VCD/SVCD
Files
Repeat
Advertisemenu No
A.P.V
Off
1.DVD:setwhetherinformationofadvertisement
andwarningsatthebeginningofDVDdiscis
skippedtoplaythemoviedirectly.
Alwaysskipads
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Optionalsetting:Yes,NO
Default:Number
2.VCD/SVCD:TosetthePCBstatus.
WhenplayingSuperVCDorVCD2.0discs,if
thePCBisON,themenuimagedisplays.
Optionalsetting:On,Off.
Default:On.
3.Files:datadiscmayprobablyincludesMp3,
JPEGandMPGformatfilesinwhichyoumay
selectDVDplayertoreadthefiletype.
Optionalsetting:Audio,Picture,Video.
Default:Audio,Picture,Video.
4.Repeat:selecttherepeatplaybackmode.
Optionalsetting:Off,Single,all.
Default:Off.
2.4.6Karaoke
1.Microphone:switchonoroffmicrophone.
Optionalsetting:On,Off.
Default:Off.
2.Kar.help:selectaccompanysingingmeans.
Optionalsetting:ChannelsL,ChannelsR,
ChannelsNoast,ChannelsNovoc.
Default:ChannelsNoast.
3.Volume:
A.Inmicrophonesetuppage,press[UP/DOWN]
cursortoselect“Volume”item,andthenpress
[OK]buttontoentertheadjustmentmenu.
B.Press[UP/DOWN]cursortoadjustthesetup
value.
C.Afteradjustmentfinishes,press[OK]buttonto
returntomicrophonesetuppage.
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4.Echo:
A.Inmicrophonesetuppage,press[UP/DOWN]
cursortoselect“Echo”item,andthenpress
[OK]buttontoentertheadjustmentmenu.
B.Press[UP/DOWN]cursortoadjustthesetup
value.
C.Aftertheadjustmentfinishes,press[OK]
buttontoreturntomicrophonesetuppage.
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2.4.7Preference
LEDControl
Gr.equalizer
Screensaver
On
Off
Off
On
2.4.9Initialsetup
any
Kid
G
PG
PG-13
PGR
R
NC-17
Allowed..
Setpassword Any
Oldpassword
Newpassword
Verify
OK Cancel
Loadfactoryseeings
OK Cancel
1.LEDControl:Thisitemisusedsetcolorofledonthefrontpanel.
Optionalsetting:On,Off.
Default:On.
2.Gr.equalizer:ThisitemisusedtosetwethertheDynamicSpectrumisallowed.
Optionalsetting:On,Off.
Default:Off.
DynamicSpectrumdisplayisinvalidinDatadiscDVDAUDIOplayback.
3.Screensaver:Openorclosethescreensaverfunction.
Optionalsetting:On,Off.
Default:On.
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◆、
◆
◆2.4.8Parentalcontrol
1.Allowed..:Tosettheparentalcontrolratingstopreventchildrenfromwatchingtherestrictedcontents.(
Incasethediscsupportsthisfunction.)
Optionalsetting:any,Kid,G,PG,PG-13,PGR,R,NC-17.
Default:any.
2.Setpassword:Tosetfourdigitpasswordtoenableyoutochangetheparentalcontrol
ratings.
Default:7890.
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◆
Press[U/DOWN]arrowtoselectthedesiredoptionandPress[OK]buttontoconfirmit.
NOTE
2.4.10Resttodefaults
Inthissetupstate,youmaynotpress[LEFT]buttontoreturntothepreviousmenu.
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2.5Specifications
Playable dlscs
Inputs
AudioOutputs
Video Outputs
Video characteristice
Audiocharacteristice
Operation voltage
Powerconsumption
Generalspecification
Operating temperature
Operating humidity
Outputs
5-35℃
15-75%(no condensatlon)
DVD-Video,SuperVCD,VCD,DlvX3.11,DlvX4,DlvX5,DlvX Pro,XvlD,
CD-DA,CD+G,DVD-Audio,HDCD,MP3,WMA,KodakPlctureCD,JPEG
MICInput,USB
Heedphonesoutput
~110-250V,50/60Hz
14W
Analog audio output: Stereo,Output5.1CH
Dlgltalaudio output: Coaxlal,Optlcal
Video amplitude:1.0Vp-p(75Ω)
S-Video amplitude:Y:1.0Vp-p(75Ω)C:0.286Vp-p(75Ω)
Componentvideo amplitude:1.0Vp-p(75Ω)
Cb/Cr:0.7Vp-p(75Ω)
Frequency response 20-20000Hz(±1 dB)
Slgnel-to-nolseratlo>100(dB)
THD <0.01%
Dlmenslons:420×236.5×39mm
Mass:2.3Kg
Composlte,S-Video,ConponentYCbCr,Proglesslve
scan outputY PbPr,RGB/SCART
◆
◆Designandspecificationsaresubjecttochangewithoutnotice. Wedonotguaranteethatalldiscscanbeplayedsmoothlyduetothediscquality,discrecording
qualityandrecordingfomnat.
-11-

ChapterThreePrincipleandServicing
SectionOnePrincipleofthePlayer
EEPROM
24C02
U202
Panel
SDRAM64M
FLASH16M
U208
U207
Video
filtering
catching
MICboard
Open/close
controlcircuit
MIC
SCL
SDA
Powerboard
+9V
-9V
Dv33
AVCC U206 V18
CS5340
Card
board
M
DVD:A/B/C/D/RFO
CD:A/B/C/D/E/FRFO
MDI
LD02
LD01
Laserpower
control
CD/DVDswitch
IOA
VR-DVD
VD-CD
LD-DVD
LD-CD
M
M
Feed
electric
machine
Main
axis
electric
machine
VIP4
Reset 27Mclock
MT1389HD
U201
AM5888
U301 FOSO
FMSO
DMSO
TRSO
FC-
FC+
TK+
TK-
SL+
SL-
SP+
SP-
UREST SCL
SDA
XI XO
3.1.1Blockdiagramoftheplayer
DV725SIiscomposedofdecodecircuit,servocircuit,audiocircuit,videocircuit,MICcircuitand
powercircuit.Blockdiagramoftheplayerisshowninthefollowingfigure3.1.1.1:
AV
output
board
RT
LT
SR
SL
LFE
CC
Audio
amplifying
filtering
U209
U210
U211
VIDEO_SY
VIDEO_SC
VIDEO_CVBS
VIDEO_B/U
VIDEO_R/V
VIDEO_G/Y
ACIN
Figure3.1.1.1Blockdiagramoftheplayer
-12-

3.1.2PCBboardblockdiagramoftheplayer
PCBboardblockdiagramoftheplayerisshowninthefollowingfigure3.1.2.1, DV725SIisaslot-in
loadermachine,withUSBreadfunction.Powerboard,AVoutputboardandMICboardisthesamewith
thatofDV516SI,pleasereferto“DV516SIservicemanual”.
Figure3.1.2.1PCBboardblockdiagramoftheplayer
Loadercomponents
Smallbracket
Decodeboard
2521S-0
AVboard
7969-5
Mainpanel
4977-3
Subsidiary
panel
9997-1 Powerboard
5977K-5
MICboard
6977K-0
XS302 XS307 XS301
XS402
XS601
XS201
XS203
Cn502
AGND
+9V
-9V
DET
OK
CN501
XS401
XS901
LFE
CC
SR
SL
R
L
VIEDO
Pb
Y1
Pr
VCC
SPDIF
PDAT1
Y
C
PDAT0
PDAT2
+10V
XS304
XS305
Photoelectric
detectboardis
onbottompart
ofloaderClosedetect
boardison
toppartof
loader
Discin/out
electric
machine
Fs0
SDA
SCK
STB
GND
VCC
IR
L
AGND
R
XS603
XS702
Cardboard
A725SI-1
XS901 XS205
VCC
USBM
USBP
GND
VCC
USBM
USBP
GND
Laserhead
-13-

3.1.3IntroductiontoICusedbythisplayer
IntroductiontoICusedbythisplayerisshowninthefollowingtable:
Semi-finished PCB
nameICmodelname Location Function
AZ431 U503 Precisevoltage regulator
HS817 U502 Photoelectric coupler
VIPER22AU501 PowerswitchIC
PT6312 U401 ControlpanelIC
HS0038B3VU402 Remotecontrolreceiver
KA4558 U601 Operationalamplifier (MIC
amplifying)
TDA1308 U603 Headphone amplifying
NJM4558 U209,U210,U211 Operationalamplifier (audio
amplifying)
HCU04 U205 Phaseinverter
HY57V641620HGT-7U208 SDRAM
LM1117 U206 1.8Vvoltage regulatorIC
24C02 U202 EEPROM
MT1389HD version U201 Decode chip
D5954 U302 Servo drive
CS4360 U204 D/Ainverter
CS5340 U203 A/Dinverter
29LV160BE U207 FLASH
Decode board
2521S-0
Powerboard 5977K-
5
Main panel4997-3
OKboard 6977K-0
-14-

SectionTwoUnitCircuitPrinciple
3.2.1Briefintroductiontoloader
1.V725SIadoptsphototonusdualslot-inandall-sealedwholesteelloaderwithcompactstructure.
Awhole-steeldiscpresssystemisinsideloadertotightlypressthediscthroughthreesmallsteelplates
tobebettersuitabletoreadthosemal-fabrictaedandfakediscs.Itisreallyfullycompatible,notonly
readlargediscwith12cm,butalsosmalldiscwith8cm.Discreadingofthemachineadoptsphototonus,
youonlyneedtoplacethediscatthedoorandtheloaderwillabsorbthediscinautomatically.This
loaderemploysSANYOlaserheadwiththeprinciplesimilartoloaderofHD62.
2.Workingprinciple:showninthefigure3.2.1.1,therearetwoemissionpipesontoppartofdisc
entryofslot-inloader,andtwophotoelectricpipesarearrangedintwoendsofdiscentry.Afterloading
onedisc,thedischoldsupthelightemittedfromemissionpipetomakethecorrespondingphotoelectric
diode(Q2)ofthisemissionpipecannotreceivethelightirradiation.ThedetectsignalDISCEJTon
loaderoutputshighleveltodecodeboard,whenDISCEJTdetectpinofMT1389detectsthatDISCEJT
signalishighlevel,itoutputsdiscincontrolsignal.Afterdiscisintotheproperposition,themechanic
structureofloadertouchesthediscinswitch,TRINchangesfromhighleveltolowlevel,decodechip
stopsoutputtingdiscinsignal,andmachinebeginstoreaddisc.Whenopendiscdoor,transmission
Vcc
GND
GND
Vcc
DISC TROUT
DESCEJT
PICK_UP
Figure3.2.1.1Discdetectillustration
Q1
Q2
-15-

Structuresendsthediscout,discdetectsthroughthephotoelectricpipe(Q1)insideloader,afterdiscis
inthespecifiedposition,TROUTchangesintolowlevel,andmachinestopsopeningthediscdoor.To
makeunderstandingeasy,wecanrefertoprincipletheillustration(irrelevanttotheactualcircuitandfor
referenceonly).
2.Functionintroductiontolaserheadflatcableisshownasthefollowingtable:
PinNameSignalflow
direction DVDdisc CD disc No disc Function description
1F-Inputloader2.52 2.34 0.46
2F+Inputloader2.49 2.49 0.93
3T+Inputloader2.53 2.51 0.94
4T-Inputloader2.58 2.51 0.93
5CInputMT1389 2.2 2.25 2.04 Disc datasignal
6DInputMT1389 2.2 3.2 2.04 Disc datasignal
7IOAInputMT1389 0.01 3.2 3.21 Disc identification signal,CD is3.3V,DVD
is0V
8RFInputMT1389 2.21 2.53 1.28 The sumofdisc datasignal
9AInputMT1389 2.17 2.22 2.04 Disc datasignal
10 BInputMT1389 2.19 2.27 2.04 Disc datasignal
11 FInputMT1389 2.07 2.44 2.03 Supplementary signalused intrace
12 GND Ground 0.01 0.01 0 Grounding
13 V20 Inputloader2.04 2.06 2.03 Referencevoltage
14 Vcc Inputloader5.04 5.04 5.02 Supply voltage forloader
15 EInputMT1389 2.06 2.45 2.03 Disc datasignal
16 Blanking haning in air0.01 0 0 unused
17 VR-CD Inputloader0.21 0.01 0 Through the handling inside loader,make
sureMD11 is180mVwhen reading CD
18 VR-DVDInputloader0.01 0.2 0 Through the handling inside loader,make
sureMD11 is180mVwhen reading DVD
19 LD-CD Inputloader0.09 2.1 0 CD laserpowercontrolsignal
20 MDII InputMT1389 0.21 0.2 0 CD and DVDlaserpowermonitoring signal
21 HFMInputloader5.04 5.04 5.02 High frequency overlapping signalproduces laserwith differentwavelengthinside
loader
22 Blanking unused 0.01 0.1 0
23 LD-DVDInputloader2.21 0.1 0 DVDlaserpowercontrolsignal
24 GND unused 0.01 0.01 0 Grounding
Focuserrorsignal isadded totwosidesof
pick-up focus coil
Trace errorsignal isadded totwosidesof
pick-up tracecoil
-16-