BBK DK3510 Service Manual

Dk3510

service manual

Catalog

Chapter One About Maintenance

1.1 Safety precautions

1.1.1 Power supply

1.1.2 Precautions for antistatic

1.1.3 About placement position

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 Control Button Locations and Explanations

2.2.1 Front Panel Illustration 1

2.2.2 Rear Panel IIIustration

2.2.3 VFD Display Window Illustration

2.2.4 Remote Control illustration

2.3 Accessories

2.4 Function setup

2.4.1 Basic Steps of Function Setup

2.4.2 General Setup

2.4.3 Display Control

2.4.4 Sound

2.4.5 Languages

2.4.6 KVD Setup

2.5 Specifications

2.6 Operation Instructions for Audio Power Amplifie

2.6.1 Featuresr

2.6.2 Accessories

2.6.3 illustrations to the panel

2.6.4 Howto use the remote

2.6.5 illustrations to the remote

2.6.6 Operating instructions

2.6.7 Specifications

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Principle of the player

3.1.2 Whole set block diagram

3.1.3 Collection of IC used by the player

Section Two Principle Analysis to Unit Circuit

3.2.1 Power circuit

3.2.2 Decode circuit

3.2.3 Servo circuit

3.2.4 Laser power control circuit

3.2.5 CD/DVD mode switch circuit

3.2.6 Main axis diversion judgement circuit

3.2.7 Disc in/out circuit

3.2.8 Reset circuit

3.2.9 Mute circuit

3.2.10 MIC circuit

3.2.11 Scoring detect circuit

3.2.12 Panel control circuit

3.2.13 MIDI signal processing circuit

3.2.14 Video circuit

3.2.15 Audio circuit

3.2.16 Introduction to SCART terminal

Section Three Servicing Cases

3.3.1 Servicing instances

3.3.2 Servicing flow chart

Section Four Servicing Parameters

3.4.1 Signal waveform diagram

3.4.2 Key point voltage

Section Five IC Function Introduction

3.5.1 Function introduction to AML3298

3.5.2 Function introduction to Vt7208

3.5.3 Function introduction to EN29LV800AB

3.5.4 Function introduction to SDRAM

3.5.5 Function introduction to MK6000B

3.5.6 Function introduction to SAM2133B

3.5.7 Function introduction to Cs4340

3.5.8 Function introduction to 4558

3.5.9 Function introduction to D5954

Chapter Four Disassembly and Assembly Process

Chapter Cinque PCB board & Circuit diagram

Section One PCB board

Section Two circuit diagram

Chart 6 BOM List

6.1AV BOARD

6.2 OK BOARD

6.3 POWER BOARD

6.4 SUBSIDIARY PANE

6.5 DECODE BOARD

6.6 OUTPUT BOARD

6.7 INPUT BOARD

6.8 REMOTE CONEROLLER

6.9 MAIN PANEL

105

110

111

113

115

120

121

6.10 SURFACE CONTROL BOARD

6.11 AMPLIFIER BOARD

6.12 AMPLIFIER BOARD AI SEGMENT

122

123

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 -

ChapterTwoFunctionsandOperationInstructions

2.1Features

◆

Songdedicationbysingers,wordsornumberstofullenjoythepleasureofpersonalized

operations.*

◆

Allkindsofsingingmethodssuchassongdedication,openchallengeanddualmeettoofferyou

widerperformancestage.*

◆

Automaticscoringfunctiontoserveasanentertainmentco-worker.

◆

CompatibleMPEG4formatdiscstoproducewonderfulpictures.

◆

Realsonicsupersoundeffect.

◆

Progressivescanningoutputtoproducesteadierandclearerpictureswithoutflicker.

◆

Built-inDolbyDigitaldecoder,separate5.1CHoutputs.

◆

OpticalandcoaxialoutputforDolbyDigital,DTSandLPCMdigitalaudio.

◆

Computer-stylepop-upmenutomaketouroperatingmoreconvenientandcomfortable.

◆

Componentvideooutputtoproduceclearerpictures.

◆

FullycompatiblewithDVD,SVCD,VCDandCD,smoothlyreadMP3,CD-R/RWandKodak

PictureCD.

◆

Multipledubbings,anglesandsubtitlesforselection.

◆

Parentallockfunctiontopreventchildrenfromwatchingdiscswithunsuitablecontents.

◆

Dust-shieldeddesign.

2.2ControlButtonLocationsandExplanations

2.2.1FrontPanelIllustration1

9 10

Powerswitch

Disctray

OPEN/CLOSEbutton

STOPbutton

CLEARbutton

PLAY/PAUSEbutton

PREVbutton

NEXTbutton

MIC1jack

MIC2jack

13 14

VOL+/-button

Echobutton

Numberbuttons

Displaywindow

-4-

2.2.2RearPanelIIIustration

ScoringinputTermina

5.1CHAudioOutjack

VideoComponent/YPbPrOutjacks

8 9

lMixedAudioOutjack

2.2.3VFDDisplayWindowIllustration

1 2 3 4 5 6 8 9 10 11

ＡＬＬＣＨＰＴＲＫ

ＫＶＤ

ＳＶＣＤ

ＳＥＬＥＣＴ

VideoOutjack

S-Video

DigitalAudioCoaxialOutjack

DigitalAudioOpticalOutjack

SCARToutjack

ＴＩＴＬＥ

Play

Repeat

Pause

Chapterindicato

Trackindicatorr

DVDdisc

Playbacktime/KVDdisc song-selectiondisc

CD/VCD/SVCD

MP3

disc

Titleindicator

Microphone

2.2.4RemoteControlillustration

STANDBYButton Pressoncetostandby,Presstwicetoplay.

EJECTButton Discinorout.

AUDIOButton Changetheaudiolanguageoraudio channel.

SUBTITLEButton Changesubtitlelanguage.

discindicator

NUMBERButton Inputnumbers. InputletterswhenplayingKVDdisc.

PROGRAMButton Programplayback.

GOTOButton Playfromthedesiredlocation. FunctionButtonF1.

14 15

Playbackstatusindicator

KVDdisc

DTS

DOLBYDIGITAL

-5-

STOPButton

1 2 3

6 7 8

10 11 12

13 14

15 16 17 18 19 20

37 36

34 33 32

29 28

27 26

25 24 23 22 21

Stopplayback.

MENUButton DisplayDVD/KVDmenuoropen/closePBC.

SELECTButton

SWITCHButton Switchvolume,rhythm,speed,toneandoriginal vocalsinging whenplayingKVDdisc.

Q-PLAYButton Skiptheadvertisement/warningandplayDVD directly. FunctionButtonF3.

MEMORYButton Savetheplayingpointorjumpto

thesavedpoint.

FunctionButtonF2.

OSDButton Displayorhidediscinformation.

CLEARButton

ANGLE/F-SONGSButton

1.Whenplayingspecially-madeKVDdiscsongs, thecurrentlyplayedsongmaybecollectedintothe favouriteones.

2.SwitchangleswhenplayingDVDdiscandrotate pictureswhenplayingJPEGdisc.

MUTEButton Pressoncetomute,twicetounmute.

TITLE/RETURNButton DVDtitlemenu/Returntotheprevious menuwhenplayingVCDorKVDdisc.

CURSORButtons

SETUPButton Functionsetup.

PAUSEButton Pauseplay.

PLAYButton Normalplayback.

P/NButton SwitchtheTVsystembetweenPAL,NTSC andAUTO.

REPEATButton Repeatplay.

ISButton Switchvideooutputtotheinterlacingmode.

PSButton Switchvideototheprogressivemode.

Word-button Presstomovedownaccordingthe alphabetofthesongname whenplayingKVDdisc. REWButton Fastbackwardplay.

Word+button Presstomoveupaccordingthealphabet ofthesongname whenplayingKVDdisc. FWDButton Fastforwardplay.

CH/APPLAUSEButton SwitchchannelsofVCDdisc/Capableof simulatingapplause whenplayingKVDdisc.

VOCALButton SwitchautopartnerwhenplayingDVD, VCDdiscs/

Turnofforturn onthevoicesingingwhenplayingKVD songswithvoicesinging.

EQButton Adjustingequalizationeffects.

SFButton Adjustingsoundfieldeffects.

NEXTButton Skipforward.

PREVButton Skipbackward.

ZOOM/S-SONGSButton Zoominthedisplayed frame/SelectedsongsWhen playingKVDdisc.

VOLUME+/-Button Increase/decreasevolumelevel.

A-B/AGAINButton Restarttheselectwhenplaying KVDdisc.

-6-

2.3Accessories

AUDIO/VIDEOCORD REMOTECONTROL AAASIZEBATTERIES WARRANTYCARD USERMANUAL SONGBOOK

1PCS

2PCS 1PCS 1PCS

1PCS

2.4FUNCTIONSETUP

2.4.1BasicStepsofFunctionSetup

1.PressSETUPbuttonandthescreendisplays Functionsetupmenu.

GeneralSetup

Display

Sound

Languages

KVDSetup

ExitSetup

2.Pressdirectionbuttontoselectthedesired menuandpressSELECTbuttontoconfirm.If youselect"ExitSetup"menu,pressing SELECTbuttonmayexitthesetupmenu.

Forinstance,youmayselect"GeneralSetup"to startgeneralsettingsandTVscreendisplays generalsetuppage.

GeneralSetup

ScreenSaver

PanelLedSetup

Lock

FactorySettings

◆PressingSETUPbuttonisinvalidwhenindisc reading.

2.4.2GeneralSetup

GeneralSetup

1.ScreenSaver:thisitemisusedtosetwhether screensaverisallowed.

Optionalsettings:ON,OFF

◆

Default:ON

◆

2.PanelLedSetup:thisitemisusedtoset

whetherthedoorindicatoronthefrontpanelis turnedon.

Optionalsettings:ON,OFF

◆

Default:ON

◆

3.LOCK:thisitemisusedtosettheage

controllingratetopreventchildrenfrom watchingunsuitablecontents(needdisc support).

Afterinputingdefaultpassword7890,youmay

◆

changethepasswordorsetthecontrollingrate whichhas8ratesforselection.

Default:Lv8

◆

4.FactorySettings:thisitemisusedtorestore

thedefaultvalueofallothersetupitemsinthe setupmenu,except“RatingsLimits”and "PSD".

CURSOR

SETUP

ScreenSaver

PanelLedSetup

Lock

FactorySettings

SELECT

3.Pressup/downdirectionbuttontoselectthe Desiredsetupitems.

Forinstance,pressup/downdirectionbuttonto select"PanelLedSetup".PressSELECTbutton toconfirmandTVscreendisplayspanelled setupitems.

GeneralSetup

ScreenSaver

PanelLedSetup

Lock

FactorySettings

4.Pressleftdirectionbuttontoexitthecurrent itemgroup,orpressSETUPbuttontoexit setupmenu

2.4.3DisplayControl

Display

1.TVSystem:thisitemisusedtosetthevideo outputsystemoftheplayer.

Optionalsettings:AUTO,NTSC,PAL

◆

Default:AUTO

◆

2.TVImage:thisitemisusedtosettheoutput imagerationoftheplayer.

-7-

TVSystem

TVImage

InterlaceSetup

VideoSetup

◆

Optionalsettings:4:3Letterbox,4:3Standard,

16:9Widescreen

◆

Default:4:3Letterbox

NOTE

◆

Theplaybackeffectisrelatedtothedisc

recordingratio.Somediscscannotplay accordingtoyourselectedpictureratio.

◆

16:9isonlyapplicableto16:9widescreenTV

set.

◆

Thepictureratioselectionshouldberelatedto

theactually-usedTVscreenratio.

3.InterlaceSetup:thisitemisusedtosetthe interlacingvideooutputmodeoftheplayer.

◆

Optionalsettings:S-VIDEO,YUV,RGB.

◆

Default:S-VIDEO

4.VideoSetup:inthisitem,youmaysetto strengthenorweakenthebrightness,contrast, chromaandsaturationof imageaccordingto youownlikes.

◆

Enterthevideosetupadjustmentmenu,and pressleft/rightdirectionbuttontoselectthe videoparameterthatyoudesireto adjust.Pressup/downdirectionbuttonagain toincreaseordecreasethisparameter.

◆

Aftertheadjustmentfinishes,pressSELECT buttontoexitthissetupitem.

2.4.4Sound

Sound

1.DigitalOut:thisitemisusedtosetthestream formofdigitaloutput.Afterpressdirection buttonstoselectDolbyDigitalorDTS,press SELECTbuttontochangetheplayerwhether DolbyDigitalorDTSdigitalrawcodesignalis outputted.Ifselected,itmeansthedigitalraw codesignalisoutputted;ifnotselected,it meansPCMsignalisoutputted. Default:Selected

◆

2.Stereo:thisitemisusedtosettheaudiooutput

modeoftheplayer.Whenstereoison,this playerwilloutputstereosignal;whenstereois off,thisplayerwilloutputmulti-channelsignal.

Default:OFF.

◆

3.Speakersetup:thisitemisusedtoadjust

Volumeanddelayofspeaker.

DigitalOut

Stereo

SpeakerSetup

LPCMOutput

ProLogicII

UserEqualizer

Speakers

SpeakerSetup

◆

Speakers:thisitemmaybesetaccordingto

Distance

Volume

Yourusedspeakersystem.

A.Optionalsettingsoffrontlarge,Small.

：

Default:Large

B.OptionalsettingsofcentreLarge,Small,

：

None.Default:Large

C.OptionalsettingsofsurroundLarge,Small,

：

None.Default:Large

D.OptionalsettingsofsubwooferExist,None.

：

Default:Exist

◆

Distance:thisitemmaybeusedtosetthe

speaker'sdelaytimeaccordingtothedistance betweenspeakerandlistener.

◆

Volume:thisitemmaybeusedtoadjustthe

Speaker'svolume.

NOTE

◆

Speakersetupmaybeperformedwhenstereo

isoff.

4.LPCMOutput:thisitemmaybeusedtosetthe outputfrequencyofLPCMaudiodatatomatch withdifferentpoweramplifier.

◆：

Optionalsettings48K,96K

◆：

Default48K

◆

Theoutputtedfrequencyisrelatedtothe

Actualfrequencyofsignal.Thesignalof48K cannotoutput96K.

5.ProLogicII:thisitemisusedtochange2channelmusicintomulti-channelmusic.

◆

Optionalsettings:ON,OFF

◆

Default:OFF

NOTE

◆

Ifthediscdoesnotsupportthisfunction,

performitbyforceandtheeffectwillbebadon thecontrary.

6.UserEqualizer:inthisitemyoumaysetto strengthenorweakenthetreble,mediantand bassaccordingtoyourownlikes.

◆

EnteruserEQsetupmenu,pressleft/right

directionbuttontoselectthesoundfrequency youdesiretoadjustandpressup/down directiontoincreaseordecreasethesound strengthofthisfrequency.

◆

Aftertheadjustmentfinishes,pressSELECT

buttontoexitthissetupitem.

◆

Afterexitingsetup,pressEQbuttontoselect

theEQmodein"PERSONAL"toenjoythe effectthatyouadjustedjustnow.

-8-

2.4.5Languages

Languages

1.PlayerMenus:thisitemisusedtosetthe Indicationinformationlanguagethattheplayer displaysduringthecourseofplaying. Optionalsettings:English,Russian.

◆

Default:English.

◆

2.DiscMenus:thisitemisusedtosetdiscmenu languageadoptedinpriorityduringthecourse ofplayback. Optionalsettings:English,Russian.

◆

Default:English.

◆

3.Audio:thisitemisusedtosettheaudio languageadoptedinpriorityduringthecourse ofplaying. Optionalsettings:English,Russian.

◆

Default:English.

◆

4.Subtitles:thisitemisusedtosetthesubtitle languageadoptedinpriority duringthecourse ofplaying. Optionalsettings:English,Russian,Off.

◆

Default:Off.

◆

PlayerMenus

Discmenus

Audio

Subtitles

2.4.6KVDSetup

RemarkSetup

MelodySetup

KVDSetup

1.RemarkSetupP:thisitemisusedtosetthe Scoringparameteroftheplayer.

Optionalsettingsofmaxscore:100,99,98,97,

◆

96default100

；：

Optionalsettingsofminscore:0,60,70,80,

◆

90default0

；：

Optionalsettingsofscoringrate:Easiest,Easy,

◆

Normal,Hard,Hardest.

2.MelodySetup:thisitemisusedtosetKVD Musicmelody.

Optionalsettings:ON,OFF

◆

Default:ON

◆

3.KVDScreen:thisitemisusedtothe backgroundimagewhentheplayerisplaying KVDdisc.

OptionalsettingsDVDScreen,Bluescreen

◆：

Default:DVDScreen.

◆

4.OpenTrayPwd:thisitemisusedtosetthe passwordneededinopenoperationwhenthe playerisplayingKVDdisc.

Default7890

◆：

5.FavoriteSong:thisitemisusedtoeditfavorite songs.Pleaserefertothefavoritesongs editinginKVDdiscoperationfordetails.

6.LyricSetup:thisitemisusedtosetlyrics Mode.

OptionalsettingsNormal,Ahead,Off

◆：

Default:Normal.

◆

KVDScreen

OpenTrayPwd

FavoriteSong

LyricSetup

◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇□◇

2.5Specifications

DVD-player

Disk Type CD-R/CK-RW,DVD-R/DVD-RW,DVD+R/DVD+RW

Format DVD-Video,KVD,MPEG-4,SVCD,VCD1.0,VCD1.1,VCD2.0,CD-DA,MP3

Input

Outputs(Audio)

Microphone in 2 Scoring 1

Line stereo 1+1(SCART)

5.1Channel Output 1 Digital Optical output 1 Digital Coaxial output

-9-

Outputs(Video)

Video Characteristics

Audio Characteristics

Composite video output 1+1(SCART) S-Video 1 Component video output Y Cb/Pb Cr/Pr 1 RGB/SCART 1

Composite Video Output Amplitude: 1.0Vp-p(75Ù) S-Video Output Amplitude: Y 1.0Vp-p(75Ù),C 0.286Vp-p(75Ù) Component video output Y Cb Cr: Y 1.0Vp-p(75Ù),

Frequency range 20-20 000 HZ SNR 90dB Total harmonic distortion 0.1%

Operating Temperature Operating Humidity 15-75% Power Supply ~220 V AC,50/60 Hz Dimension 420×266×45mm Weight 2.4kg Speaker systems

RMS Output Power (THD 10%,1kHz)

Max.Output Power

Surround

Others

+5… +35℃

L,R,C,SR Channel 10W SW Channel 25W

L,R,C,SL,SR Channel 20W SW Channel 40W

Speaker 165mm Dimension 00×310×325mm

Speaker 76mm Dimension 100×86×112mm

Power supply 220V;50Hz Max.power consumption 160W Frequency range 20-20000Hz

2.6OperationInstructionsforAudioPowerAmplifier

2.6.1FEATURES

5.1CHaudioinput,capableofconnectingDolbyAC-3andDTSdecodingoutputsignals

◆

Simultaneous5.1CHvolumeadjustment

◆

Center,surroundandsubwooferchannellevelseparateadjustment

◆

Standbyfunction

◆

Mutefunction

◆

Fullfunctionremotecontrol

◆

Powerfulandhighperformanceamplifier

◆

Completeprotectionfunction

◆

Fullmagnetic-shieldeddesignforsatellitespeakers

◆

Uniquereflectivebassstructure

◆

Novelappearance,softcolor

◆

2.6.2ACCESSORIES

Pleaseopenthecartonboxandcheckyourspeakersystem.Ifthemodelandquantitydonotconformto

thefollowinglist,pleasecontactthedealer.

SatelliteSpeakers

◆

Dual-RCAPlugAudioCord

◆

-10-

5pcs 2pcs

AudioCord

◆

Left,RightandCenterSpeakerCords(ca.2m)

◆

SurroundSpeakerCords(ca.5m)

◆

sforPhonesJac

2.6.3ILLUSTRATIONSTOTHEPANEL

3pcs

3pcs 2pcs

２２０Ｖ／５０Ｈｚ

￣

MAX.POWERCONSUMPTION:160W VOLTAGE:~220V/50Hz SWRATEDIMPEDANCE:6

SWMAX.OUTPUTPOWER:40W SWFREQUENCYRESPONSE:20Hz~180Hz EXTERNALLOADEDIMPEDANCE:4

DVDHOMETHEATREDK3510S

POWER

IRSensor/LEDDisplay

(FRONTPANELFIGURE)

CONNECTTOTHEACPOWERSUPPLY

Safetywarningmark

5CHspeakerconnectionports

Powerswitch

Productdata

Powercords

Manufacturer

(REARPANELFIGURE)

2.6.4HOWTOUSETHEREMOTE

IRSENSOR

◆Pointtheemitteroftheremotecontrolatthe infraredsensoronthesubwooferspeaker. Usetheremotecontrolwithinadistanceof8meters

◆

fromthesubwooferspeaker. Usetheremotecontrolwithinanangleof30

◆

degreesfromthecenter.

-11-

2.6.5ILLUSTRATIONSTOTHEREMOTE

SURRchannelleveladjustment Usedtoadjustthesurroundchannellevelcompared withthemastervolume.

CENTREchannelleveladjustment Usedtoadjustthecentrechannellevelcompared withthemastervolume.

SWchannelleveladjustment Usedtoadjustthesubwooferchannellevel comparedwiththemastervolume.

MUTE PresstheMUTEbuttontoterminateaudiosignal outputs.PressitagaintocancelMUTEandrestore audiooutputs.

2/5.1CH Selectbetween2.1soundfieldand5.1soundfield

VOLUME Adjustthe5.1CHvolumesimultaneously.

STANDBY Pressthisbuttontoenterorleavethestandbymode. Thepowerisnotcutoffinthestandbymode. Therefore,pleaseturnoffthepowerswitchonthe subwooferspeakerwhenyoudonotintendtouseitfor anextendedperiodoftime.

2.6.6OPERATINGINSTRUCTIONS

6 5

２２０Ｖ／５０Ｈｚ

￣

MAX.POWERCONSUMPTION:160W VOLTAGE:~220V/50Hz SWRATEDIMPEDANCE:6

SWMAX.OUTPUTPOWER:40W SWFREQUENCYRESPONSE:20Hz~180Hz EXTERNALLOADEDIMPEDANCE:4

POWER

GETTINGSTARTED

1.nserttheplugintothepowersupplysocket,turnonthePOWERbuttonontherearpanelofthe subwooferspeaker,theCPUcomesintoinitializationandtheunitentersthestandbymode,theLED displays"--".

-12-

USINGTHESTANDBYBUTTON

2.PresstheSTANDBYbuttontoentertheworkmode.Themastervolumerisesupfrom“0"to"4” (DEFAULTVALUE)graduallyandtheLEDdisplaysthecorrespondinglevel.

PresstheSTANDBYbuttonagain,thisunitwillentertheSTANDBYmode.Inthismode,thisunitisnot poweredoff.Therefore,pleaseturnoffthePOWERbuttonontherearpanelofthesubwooferspeakerif youdonotintendtousethisunitforanextendedperiodoftime.

ADJUSTINGTHEVOLUME

3.PresstheVOLUME/buttonsontheremotecontroltoadjustthe5.1CHvolumesimultaneously, thedisplayedrange:0~16. PresstheVOLUMEtoincreasethevolume,themaximumdisplayingvolumeis16. PresstheVOLUMEtodecreasethevolume,theminimumdisplayingvolumeis0.

ADJUSTINGTHESURROUND/CENTRE/SUBWOOFERCHANNELLEVEL

4.PresstheSURR/CENTRE/SW+/-buttonsontheremotecontroltoadjustthecorrespondingchannel

levelsseparatelycomparedwiththemastervolume. Adjustmentrange:TheVolume5 Pressthe+buttontoincreasethelevel.Themaximumdisplayinglevelis5. Pressthe-buttontodecreasethelevel.Theminimumdisplayinglevelis-5.

ADJUSTINGTHESURROUND/CENTRE/SUBWOOFERCHANNELLEVEL(CONTINUED)

Adjusteachchannellevelcomparedwiththemastervolumetocompensatesound imbalanceduetopoorlisteningcircumstancesorawkwardlocationofthespeakers. Youcanalsoadjusteachchannelaccordingtoyourpersonalfavoritesandthe characteristicsoftheprograminordertoobtainasatisfactoryeffect. ThemastervolumelevelwillreappearontheLEDabout3secondsaftertheaboveoperationsstop.

USINGTHEMUTEBUTTON

5.PresstheMUTEbuttonontheremotecontroltomutethesound. PresstheMUTEbuttonintheplaybackmodetoterminatetheaudiosignaloutput. PresstheMUTEbuttonagaintorestorethenormalaudio.TheLEDdisplaysaflashing"0"inthemute

mode.

SOUNDFIELDSELECTION:

6.Toadapttodifferentprogramsignals,thisunitutilizes2/5.1CHselectfunction.Whenyouenjoy2CH programofCDdisc,youaresuggestedtouse2.1CHmodeand2.1displaysonthescreen;centre andsurroundhavn'tsoundoutputatthistime.Whenyouenjoy5.1CHprogram,youmaypress 2/5.1CHbutton.Thisunitenters5.1CHmode,5.1displaysonthescreenandtheunitisin5.1 workingmodeatthistime. NOTE:Theunitdefaults5.1CHmodewhenpoweron.

“”

RMSOutputPower:

◆

“”

2.6.7SPECIFICATIONS

◆

RMSOutputPower:

L,R,C,SL,SRChannelOutputPower:10W¡Á5(RMS,Load=4,f=1kHz) SWOutputPower:25W(RMS,Load=6,f=40Hz

◆＜（

TotalHarmonicDistortion:1%at1kHz,1W)

◆

AmplifierFrequencyResponse:180Hz~20kHz¡À3dB(D,R,C,SL,SR)20Hz~180Hz¡À3dB(SW)

≥Ω

◆

5.1CHInputJacks:RCASocketLineIn

◆＞Ω

InputImpedance:10K

-13-

◆

Control,AdjustmentMeans:RemoteControlled

◆

SubwooferUnit:6.5"DynamicPaperConeSpeaker

Max.OutputPower:40W NominalImpedance:6

FrequencyResponse:50Hz~250Hz

◆

SatelliteSpeakerUnit:3"WideFrequencyBand(Magnetic-shielded)ConeSpeaker

Max.OutputPower:20W NominalImpedance:4

FrequencyResponse:50Hz~250Hz

◆

InputPowerSupply:~220V¡À10%50Hz

◆

MAX.PowerConsumption:160W

◆

SubwooferSpeakerDimensions:200¡Á310¡Á325mm(L¡ÁW¡ÁH)

◆

SatelliteSpeakerDimensions:100¡Á86¡Á112mm(L¡ÁW¡ÁH)

◆

PackageDimensions:525¡Á475¡Á385mm(L¡ÁW¡ÁH)

◆

NetWeight:12.5kg

◆

GrossWeight:14.2kg

-14-

Chapter Three Principle and Servicing

Section One Principle of the Player

3.1.1 Principle of the player

1. DVD player DK3510S is composed by the following PCB components, whole set PCB

components compose block diagram, shown as the following figure 3.1.1.1:

(1) Power board: supply power for each circuit of the player, composed by TNY268P, PC817,

TL431C.

(2) Main panel: operate function of the player and display working state of the player, composed of

UPD16312,12C508A (516B) and display screen.

(3) Decode board: process information transmitted by loader and restore into audio, video signals,

loader drive, panel display control MIDI signal processing.

(4) AV output board: output audio, video signals sent out from decode board completely.

(5) MIC board: after amplifying and echo processing of signal inputted from microphone, overlap to

audio output to realize Karaoke function.

CN503

CN501

Power board

CN502

XS601

MIC board

SCART

Loader components

AV output board

XS701

Decode

To pick-up

To pick-up bracket

To loader frame

board

XS203

XS205

XS206

XS207

XS209

Subsidiary board

XS401

Figure 3.1.1.1 PCB components compose block diagram

- 15 -

Main panel

XS402

2. As shown in the figure 3.1.1.2, it is pin description of the block diagram composed by whole set

PCB components:

GND VSTB VCLK VDAT

24PIN

XS209

7 6 5 4 3 2 1

XS203

C25C

GND-LD

DVD-LD

(NC)

HFM

CD-LD

VR-DVD

VR-CD

(NC)

Vcc

GND-PD

F B/b A/a

CD/DV

D D/d C/c

T- T+ F+

F- C27C

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

XS207

6 5 4 3 2 1

CN502

FL+ FL-

-21V DGND SA+5V STB

CPU+3.3V

CN503

VOICE-DET

OK AGND +9V

-9V DGND +5V DGND +3.3V DGND +5V

L210 50E

G/Y/Y

L209 50E

R/Cr/Pr C

+9V

HSYNC VSYNC

SPDIF VCC5

GND

GND R/Cr/Pr GND G/Y/Y GND B/Cb/Pb GND CVBS FS1 AUDIO_L GND AUDIO_R GND AUDIO_SL GND AUDIO_SR GND AUDIO_C GND AUDIO_SW

SCOREIN GND

10 11 12 13 14 15 16

1 2 3 4 5 6 7 8 9

17 18

19 20

23 24 25

27 28 29

Figure 3.1.1.2 Flat cable base pin description illustration

XS205

SPINSPIN+

LIMIT TROUT SLED+ SLED-

GND GND

1 2 3 4 5 6 7

1 2 3 4 5 6 7 8

9 10 11 12 13

XS206

SA+5V

-9V +9V AGND OK

VOICE-DET

5 4 3 2 1

CN501

1 2 3 4 5 6

LOAD+ LOAD-

TRIN

3.1.2 Whole set block diagram

The whole set block diagram is shown as the following figure 3.1.2.1:

Keyboard array

Remote control receiver

RESET

U202

D16312

AVID0~3

IEC

Loader components

U203 D5954

Servo drive

A B C D E F

U201 VT7208

SDA

U223

Reset

SDL

AML3298

U216

FLASH

AC IN

U215

DRAM

Power board

U208 SDRAM

DC OUT

U206

M2 D[0 10] M2 D[0 7]

FLASH

M2 D[0 15]

U205

SDRAM

Figure 3.1.2.1 The player block diagram

U207 CS4360

U210

EPM3032

U209

MK-6000B

VFD displsy

CVBS

R/Cr/Pr

Filtering

G/Y/Y

circuit

B/Cb/Pb

U214

SAM2133B

SPDIF

Audio amplifying

U219 U220

5.1CH

U221

U212

FLASH

U211

output

board

U213 Cs4340

MIDI_LOUT

MIDI_ROUT

MIDI_R

MIDI_L

U226 4580

- 16 -

3.1.3 Collection of IC used by the player

PCB board Location number IC model Function

U223 AT24C16 EEPROM(16K): save user-set information and order

U213 CS4340A

D/A inverter: switch MIDI data outputted by U211 into analog audio signal

U205,U208 IS42SI6400

SDRAM 64M

U222 LM393 Operational amplifier: main axis detecting

U215 MIIB416256A DRAM(4M): date save of servo circuit

U209 MK-6000B MIDI signal decode and MIDI processing circuit MPU

U207 CS4360 5.1CH D/A converter

U219,U220,U221,U226 4558 Operational amplifier: audio amplifying

U214 HCU04 Inverter: reset and digital audio output usage

U224 LA1117MP

1.8V voltage regulating IC: output 1.8V voltage and supply for decode chip

U202 AML3298 Decode chip: audio, video decode

U203 D5954 Servo drive

U212 R27V3202 MASK ROM(32M)

U211 SAM2133B MIDI signal synthesize

U201 VT7208 Servo RF amplifying, DSP

U206 EN29LV800AB FLASH(16M): DVD firmware

U211 EPM3032A MIDI signal processing firmware

U216 A290021TL ROM(2M): servo firmware

U401 D16312 VFD drive and buttons function realization

U403 12C508A Power management

U504 LM7805 5V voltage

U501 TNY268P Switch module

U503 TLV431 3-end adjustable spliflow reference source

U506 MCR100-6 Controllable silicon

U502 PC817 Photoelectric coupler

U601,U602 4558 Operational amplifier

U603 M65831AP Echo processing

MIC board

Decode

board

Panel

Power board

Collection of IC used by player DK3510S is shown as the following table:

- 17 -

Section Two Principle Analysis to Unit Circuit

3.2.1 Power circuit

1. Power circuit block diagram is shown as the following figure 3.2.1.1:

CPU+3.3V

STB

SA+5V

+9V

+5V

+3.3V

CPU+3.3V

-9V

Bridge rectification and filtering circuit

filtering circuit

220V

disturbance

Electromagnetic

Start circuit

Switch module TNY268P

310V DC

Absorption loop

Filtering

Rectification diode

Transformer

Rectification diode

Feedback loop

Figure 3.2.1.1 Power circuit block diagram

Rectification diode

Rectification, filtering

Filter capacitor

-9V voltage regulator circuit

Standby control circuit

LM7805

SR160

FL+ FL- -21V

2. Working principle

(1) Power-on standby working process: through protector tube, power grid filer, rectification and

filtering to AC power, DC power on two ends of Tc501 is 300v, DC power is provided for IC TNY268P

through switch transformer, TNY268P produces 132KHz frequency square wave for starting up, and

controls built-in MOS field effect tube to carry out on/ff action. When MOS tube is on, primary coil current

of transformer linearly increases and begins to save energy. When MOS tube is off, for magnetic flux of

transformer ( ) cannot change suddenly, energy discharge begins, transformer primary coil current

begins to become small, each secondary coil voltage begins to increase, transformer finishes a process

of energy save and energy discharge, each ground output voltage of secondary stage increases step by

step. In each group secondary stage of transformer, 14, 11 winding turn ratio is much larger (10 times of

3.3V sampling winding), output voltage is very high. When power-on fir the first time, STB is low level,

controllable silicon MCR100 is on, now sampling winding is 14-11, when output makes “CPU+3.3V” line

increase to 3.3V, “CPU+3.3V” is kept in 3.3V without change through optical coupling. Now standby IC

- 18 -

12C508A has 3.3V power supply, for turn ration of other winding of transformer is small, output voltage

is very low, the whole set does not work. Pin 3 of 12C508A outputs control signal to make panel red light

drive and lighted to indicate the standby state.

In this standby state, the on time of photoelectric coupler is long, TNY268P is in intermission

working state and limits the max current of primary coil of each energy storing process in a small range

to decrease the energy conversed in each energy change cycle of transformer. In this standby state, pin

5 “STB” of 12C508A outputs low level, triode 2N5551 keeps in cutoff, MCR100 maintains on state of

controllable silicon.

(2) Power-on working process: at the moment of pressing power button, pin 2 of standby IC

(12C508A) on panel changes into low level from high level, pin 5 “STB” turns into high level from low

level state. 2N5551 is saturation on and pulls down “G” voltage of MCR100 control end to about 2.7V to

make MCR100 cannot be touched off,1411 winding cannot supply power for”CPU+3.3V” line through

MCR100, now transformer sampling winding switches into 10, each winding begins to set up voltage, in

order to keep “CPU+3.3V” voltage stable, the on time of MOS pipe becomes lone.

(3) When in standby state, after pressing power button on remote controller, power on/off working

process is as follows:

A. After pressing power button on remote controller, receiver on panel outputs remote control code

to pin 7 of 12C508A.

B. 12C508A decode the remote control code received, if it is power button value, level of pin 5 is

made to change into high level from low level, and the player begins to work normally.

(4) Press power button on the panel to make the player switch into standby state from working state

A. At the moment of pressing power button, pin 2 of 12C508A changes into low level from high level,

after 12C508 detects this change, pin 5 “STB” turns into low level state from high level state.

B. 2N5551 changes into cutoff state, MCR100 restores into controllable and on state.

C. MCR100 output makes “CPU+3.3V” line voltage increases, LM431A, photoelectric coupler,

TNY268P quickly controls transformer to pause power output. Now 1613 winding achieves switch power

control right.

D. When “CPU+3.3V” reduces voltage, transformer outputs power again, now other winding cannot

keep the working of the player because turn ration is small and output voltage is small, the player enters

standby state.

3. Standby control circuit

(1) IC 12C508A is programmable CPU, and its pin function is decided by the burnt program. Shown

as in the figure 3.2.1.2, pin 1 is power pin, pin 8 is ground; pin 2 and 7 are input end; pin 3, 4, 5 and 6 are

output end. When power on, pin 3, 4 outputs high level, pin 6 outputs low level. When pin 2 level

changes into low level once, each output pin level turns once. Pin 7 is connected to remote control code,

when remote control code is inputted, the corresponding action is performed according to the

- 19 -

Corresponding code value.

C441 104

D406

1N4148

R440

10K(DNS)

3.3V

R439 10K

C442 104

R438 10K

1 2

LED

Q404 8050(DNS)

U402

12C508A(516B)

vdd

2 3 4

GND GP5 GP4 GP3

R443

0R(DNS)

GP0 GP1 GP2

R436

10K(DNS)

1 8 7 6

R444 330R

ASTB

TC404

100uF/16V

R442

10K(DNS)

1N4148(DNS)

R441 10K(DNS)

SW1

D407

Figure 3.2.1.2 12C508A circuit diagram

(2) Standby control circuit is shown as the following figure 3.2.1.3:

STB

TC403

22uF/16V

R435 10K

1 2

C445 471

C444 104

100R R437

D513

HER105

C516

101

L502 200uH/0.2A

R512 22K

U506

MCR100-6

TC515

100uF/16V

D507 1N4148

C517 104

R513

C520

104

Q502 2N5551

R514 10K

CPU+3.3V

STB

Figure 3.2.1.3 Standby control circuit diagram

1) Working process of controllable silicon after inserting power cord:

A. After switch IC starting, transformer secondary outputs high frequency pulse, with amplitude

above 70V.

B. One path of positive pulse, after D513 high frequency rectification and L509 frequency division,

reaches anode of controllable silicon; the other path, after C516 coupling and R512 damping, reaches

gate electrode of controllable silicon.

C. Gate electrode positive pulse makes controllable silicon on, anode positive voltage charges

TC515 through controllable silicon.

D. After a positive pulse finishes, for anode has no power, controllable silicon cuts off.

E. When next positive pulse is coming, controllable silicon is on again. Repeat the process like this,

TC515 voltage increases to 3.3V gradually.

- 20 -

2) Power on, the working process of controllable silicon after “STB” turns into high level from low

Key point position

Standby voltage

(V)

Working voltage

(V)

Key point position

Standby voltage

(V)

Working voltage

(V)

TC501 anode 300 300 STB 0.1 5

Pin 5 of U501 300 300 +3.3V 0 3.3

Pin 4 of U501 0.2 0.7 U503 pin K 1.8 1.8

Pin 1 of U501 6 6.1 U503 pin R 1.25 1.25

CPU+3.3V 3.3 3.3

level:

A. “STB” changes to high level from level, triode 2N5551 is saturation on to form stable DC working

state, gate electrode voltage of controllable silicon is stabilized about 2.7V.

B. When positive pulse reaches controllable silicon gate electrode through R512, voltage of two

ends of C517 cannot change suddenly, value of C517 is large, positive pulse is absorbed by C517, gate

electrode voltage of controllable silicon cannot reach 4V in a pulse cycle, so controllable silicon cannot

be touched off.

C. After positive pulse finishes, C517 discharges through R513 to recover 2.7V voltage of gate

electrode.

D. So, though anode of controllable silicon exists pulse all the time, but controllable silicon cannot

be touched off, controllable stops charging to TC515.

3) Power off, working process of controllable silicon after “STB” turns into low level from high level:

A. “STB” turns into low from high, triode 2N5551 cuts off, C517 finishes discharging through R513.

Now, gate electrode is void, controllable silicon turns into controllable state sensitive to positive pulse.

B. When positives pulse comes, for C517 is in hanging state, cannot charge, cannot perform

clamping to gate electrode, so gate electrode can be over 4V easily to trigger controllable silicon on,

controllable silicon has current through to charge Tc515.

4. Secondary output voltage

(1) L+, FL-: display screen filament power, its two ends have AC voltage with about 3.5V, use DC

level to test that -25V DC voltage is between FL+ over the ground.

(2) SA+5V: decode board servo power supply and loader power supply.

(3) +9V, -9V: for audio amplifying IC4558 usage, MIC board microphone signal amplifying, power

supply processing.

(4) +5V, +3.3V decode part and MIDI signal processing part power supply, panel power supply.

(5) CPU+3.3V panel standby control IC U402 power supply.

5. Key point voltage (unit: V) is shown as the following table:

- 21 -

- 22 -

Figure 3.2.2.1 Decode circuit block diagram

3.2.2 Decode circuit

1. Decode circuit block diagram is shown as the following figure 3.2.2.1:

2. Working principle: when power supply switches from standby to power-on, reset circuit provides

decode chip a reset signal with effective low level to pin 171 of decode chip and pin 12 of FLASH to reset

chip. After decode chip resets, reset signals sre outputted from IO port (software defined) to other

subsidiary circuit required reset (MIDI processing circuit, servo, etc), 27M clock produces clock signal

required by each circuit through PLL circuit inside decode chip, the power-on working process is:

Power on reset servo and other reset circuit output read, write order to SDRAM and FLASH

display power-on image VFD display check whether door has been to proper position power-on

finishes

Signal after being audio/video decoded are processed inside decode chip, video signals are analog

output, audio signals are digital output.

3.2.3 Servo circuit

1. DK3510 adopts SANYO 62 loader and VT7208+ROM (1M) + DRAM (4M), and its servo circuit is mainly

composed of front signal processing and digital servo processing, digital signal processing IC Vt7208 and drive

circuit D5954, shown as in the following figure 3.2.3.1:

Loader

Feed electric machine

Main axis electric machine

XS301

6 8 9

11 15

XS205

LDO2

LDO1

CD_DVD

VD_DVD

VD_CD

F-

F+

TR+

TR-

SLED-

SLED+

SPIN-

SPIN+

Main axis rotated speed detect

XS206

LOAD+

LOAD-

Laser power control

CD/DVD control circuit

U203

D5954

Disc in/out circuit

TRAYOUT#

TRAYIN#

MDI1 MDI2

LDODVD

LDOCD

VRA

ABCDEFRF

GIO6

A290021TL ROM

M11B416256A SDRAM

AML3298

TRSO

DMSO

FMSO

FOSO

Integration circuit

DOEN

LIMIT#

GIO4

GIO5

U216

U215

U202

OUTTRAY

INTRAY

116

HRST

TRO

DMO

FMO

FOO

102

103

115

107

27 28

6 7 8

U202

Vt7208

106

Figure 3.2.3.1 Servo circuit block diagram

- 23 -

2. Working principle: after power-on of the whole set, reset circuit performs reset to decode chip,

then decode chip performs reset to servo control chip U201 (VT7208) (refer to unit circuit analysis for

reset circuit principle); VT7208, U216 software program compose servo control system, which mainly

fulfils tasks of servo control, pick-up collect disc signal processing. After system resets, through door on

loader frame to proper position, detect switch begins to detect whether loader tray reaches to proper

position. If the door does not close to proper position, order of disc in is sent out to disc in/out circuit to

perform disc in/out action. When VT7208 detects that door reaches to proper position, VT7208 sends

out feed order and makes pick-up components begin to carry out feed, focus and light emitting action. If

the detector (PD) does not detect any information, the machine will display no disc. When disc is in

machine, main axis electric machine begins to rotate, the laser sent out by LD is transmitted by disc to

detector (PD) to converse signals into electric signals (A, B, C, D, E, F signals DVD only has A, B, C, D

signals), RF signal inputs from pin 5~9, 21, 22 of VT7208 separately and then divides into two parts

after amplifying processing by pre amplifier inside VT7208: one part, after VT7208 internal digital servo

signal circuit processing, forms the corresponding servo control signals and output FOO, TRO, DMO,

FMO digital servo control signal from pin 44, 41, 42, 43 of VT7208 and change into analog servo control

signals FOSO, TRSO, DMSO, FMSO

Through integration circuit composed by resistance capacitor and then send to drive circuit D5954

for drive amplifying, after drive amplifying, drive focus coil, trace coil, main axis electric machine and

feed electric machine separately. Focus and trace servo are used to accurately correct objective

position; feed and servo are used to bring along laser head to make radial large-scale move which

belongs to the preliminary adjustment to pick-up position; and main axis servo is used to control main

axis electric machine to make it read signals in means of constant linear velocity and bring along disc to

rotate. After processing of amplification by VGA voltage control amplifier and equalization frequency

compensation inside VT7208, another part of signals are changed into digital signals through internal

A/D converter. When loader is reading CD/VCD signals, these signals are conducted EFM demodulation

inside VT7208, and then outputted to latter stage for AV decoding after finishing CIRC (Cross-

Interleaved Reed-Solomon Code) error correction inside. When loader is reading DVD signals, these

signals are conducted ESM demodulation inside VT7208, and then sent to AML3298 for decoding after

finishing RSPC error correction inside.

3. Explanation to servo terms

FOO: when rotating, disc may probably move upwards or downwards slightly to make the focus of

laser emitted by pick-up cannot justly fall on data pit of disc, so pick-up is required to move upwards or

downwards to make focus aim at data pit justly. When pick-up is moving upwards or downwards, it

means that pick-up is making focus acts.

TRO: data information is save in disc in form of tracks. The process when pick-up moves from one

track to another one to read data is trace. In this process, it is objective, but the entire pick-up, that

- 24 -

Moves forwards or backwards, and the moving range is very small.

1 2 3 4 5 6 7 8 SPIN+ SPIN-

VCD disc 0.04 1 2.42 0.01 0.93 2.58 0.02 5.08 3.7 1.48

DVD disc 0.04 0.7 2.69 0.01 0.65 2.86 0.02 5.08 4.1 1.03

U222 LM393

Main axis signal

Disc

Pin Name

Signal flow

direction

DVD disc CD disc No disc Function description

1 F- Input loader 2.52 2.34 0.46

2 F+ Input loader 2.49 2.49 0.93

3 T+ Input loader 2.53 2.51 0.94

4 T- Input loader 2.58 2.51 0.93

5 C Input MT1389 2.2 2.25 2.04 Disc data signal

6 D Input MT1389 2.2 3.2 2.04 Disc data signal

7 IOA Input MT1389 0.01 3.2 3.21

Disc identification signal, CD is 3.3V, DVD

is 0V

8 RF Input MT1389 2.21 2.53 1.28 The sum of disc data signal

9 A Input MT1389 2.17 2.22 2.04 Disc data signal

10 B Input MT1389 2.19 2.27 2.04 Disc data signal

11 F Input MT1389 2.07 2.44 2.03 Supplementary signal used in trace

12 GND Ground 0.01 0.01 0 Grounding

13 V20 Input loader 2.04 2.06 2.03 Reference voltage

14 Vcc Input loader 5.04 5.04 5.02 Supply voltage for loader

15 E Input MT1389 2.06 2.45 2.03 Disc data signal

16 Blanking haning in air 0.01 0 0 unused

17 VR-CD Input loader 0.21 0.01 0

Through the handling inside loader, make

sure MD11 is 180mV when reading CD

18 VR-DVD Input loader 0.01 0.2 0

Through the handling inside loader, make

sure MD11 is 180mV when reading DVD

Focus error signal is added to two sides of

pick-up focus coil

Trace error signal is added to two sides of

pick-up trace coil

FMO: similar to acts of trace, the acts of feed are larger than those of trace. Feed conducts a large

scale movement firstly, and then trace moves slightly in this range. Feed moves for a while, and does

not move for another while; but trace moves all the time. Feed is rough adjustment and trace is fine.

DMO: its main function is to bring along disc to rotate in constant linear velocity.

4. Key point voltage (V) is shown as the following table:

5. Loader signal function explanation is shown as the following table:

- 25 -

Pin Name

Signal flow

direction

DVD disc CD disc No disc Function description

19 LD-CD Input loader 0.09 2.1 0 CD laser power control signal

20 MDII Input MT1389 0.21 0.2 0 CD and DVD laser power monitoring signal

21 HFM Input loader 5.04 5.04 5.02

High frequency overlapping signal produces

laser with different wave length inside

loader

22 Blanking unused 0.01 0.1 0

23 LD-DVD Input loader 2.21 0.1 0 DVD laser power control signal

24 GND unused 0.01 0.01 0 Grounding

Note: A. When reading DVD, there are only A, B, C, D signals.

B. When reading CD, there are A, B, C, D, E, F signals.

C. RFO=A+B+C+D. 4. Focus error signal=(A+C)-(B+D) Trace error signal=E-F.

3.2.4 Laser power control circuit

1. Laser power control circuit is shown as the following figure 3.2.4.1:

Loader

laser power detecting signal input pin, pin 29 is VCD laser power drive control output pin and pin 30 is

DVD laser power drive control output pin.

Figure 3.2.4.1 Laser power control circuit diagram

2. Working principle: pin 28 of VT7208 is VCD laser power detecting signal input pin, pin 27 is DVD

- 26 -

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