Daewoo DS-2000D Schematic

MODEL

SERVICE MANUAL

CAUTION : Before servicing this chassis, read the "PRODUCT SAFETY SERVICE FOR VIDEO PRODUCTS" section
on page 2 of this manual.

DS-2000D

DVD and CD
PLAYER

DVD VIDEO PLAYER

SEPECIFICATION

Signal system
Laser
Frequency response
Signal/Noise ratio

Audio distortion+noise
Channel Separation
Dynamic range

OUTPUTS

Video outputs
S-video outputs

Audio outputs (digital audio)
Audio outputs (analog audio)

GENERAL

Power supply
Power consumption
Dimensions
Operating temperature
Weight

NTSC/AUTO/PAL
Wavelength 650nm
20Hz 20kHz

85dB

-80dB(1kHz)
90dB(1kHz)
85dB(1kHz)

1.0V(p-p), 75ohm, negative sync.
(Y)1.0V(p-p), (C)0.286V(p-p)
75ohm, negative sync.

0.5V(p-p), 75ohm

2.0V rams(1KHz, 0.8dB), 10Kohm

AC230V, 50Hz

20W
435 x 90 x 280 (mm)
540
Around 4kgs

PRODUCTSAFETYSERVICINGGUIDELINESFORVIDEOPRODUCTS

CAUTION:DONOTATTEMPTTOMODIFYTHISPRODUCTINANYWAYAND
NEVERPERFORMCUSTOMIZEDINSTALLATIONSWITHOUT
MANUFACTURER'SAPPROVAL.UNAUTHORIZEDMODIFICATIONSWILLNOT
ONLYVOIDTHEWARRANTY,BUTMAYLEADTOYOURBEINGLIABLEFOR
ANYRESULTINGPROPERTYDAMAGEORUSERINJURY.

SERVICEWORKSHOULDBEPERFORMEDONLYAFTERYOUARE
THOROUGHLYFAMILIARWITHALLOFTHEFOLLOWINGSAFETYCHECKS
ANDSERVICINGGUIDELINES.TODOOTHERWISE,INCREASESTHERISKOF
POTENTIALHAZARDSANDINJURYTOTHEUSER.

WHILESERVICING,USEANISOLATIONTRANSFORMERFORPROTECTION
FROMA.C.LINESHOCK.

SAFETYCHECKS

AFTERTHEO RIGINALSERVICEPROBLEMHASBEENCORRECTED,ACHECK
SHOULDBEMADEOFTHEFOLLOWING.

SUBJECT:FIRE&SHOCKHAZARD

1.BESURETHATALLCOMPONENTSAREPOSITIONEDINSUCHAWAYAS
TOAVOIDPOSSIBILITYOFADJACENTCOMPONENTSHORTS.THISIS
ESPECIALLYIMPORTANTONTHOSEMODULESWITCHARE
TRANSPORTEDTOANDFROMTHEREPAIRSHOP.

2.NEVERRELEASEAREPAIRUNLESSALLPROTECTIVEDEVICESSUCHAS
INSULATORS,BARRIERS,COVERS,SHIELDS,STRAINRELIEFS,POWER
SUPPLYCORDS,ANDOTHERHARDWAREHAVEBEENREINSTALLEDPER
ORIGINALDESIGN.BESURETHATTHESAFETYPURPOSEOFTHE
POLARIZEDLINEPLUGHASNOTBEENDEFEATED.

3.SOLDERINGMUST BEINSPECTEDTODISCOVERPOSSIBLECOLD
SOLDERJOINTS,SOLDERSPLASHESORSHARPSOLDERPOINTS.BE
CERTAINTOREMOVEALLLOOSEFOREIGNPARTICLES.

4.CHECKFORPHYSICALEVIDENCEDFDAMAGEORDETERIORATIONTO
PARTSANDCOMPONENTS,FORFRAYEDLEADSANDDAMAGED
INSULATION(INCLUDINGA.C.CORD),ANDREPLACEIFNECESSARY
FOLLOWORIGINALLAYOUT,LEADLENGTHANDDRESS.

5.NOLEADORCOMPONENTSHOULDTOUCHARECEIVINGTUBEORA

RESISTORRATEDAT1WATTORMORE.LEADTENSIONAROUND
PROTRUDINGMETALSURFACESMUSTBEAVOIDED.

6.ALLCRITICALCOMPONENTSSUCHASFUSES.FLAMEPROOFRESISTORS,

CAPACITORS ,ETC.MUSTBEREPLACEDWITHEXACTFACTORYTYPES,
DONOTUSEREPLACEMENTCOMPONENTSOTHERTHANTHOSE
SPECIFIEDORMAKEUNRECOMMENDEDCIRCUITMODIFICATIONS.

7.AFTERRE-ASSEMBLYOFTHESET,ALWAYSPERFORMANA.C.LEAKAGE
TESTONALLEXPOSEDMETALLICPARTSOFTHECABINET,(THE
CHANNELSELECTORKNOB,ANTENNATERMINALS.HANDLEAND
SCREWS)TOBESURETHESETISSAFETOOPERATEWITHOUTDANGER
OFELECTRICALSHOCK.DONOTUSEALINEISOLATIONTRANSFORMER
DURINGTHISTEST,MAKESURETOUSEANA.C.VOLTMETER.HAVING
5000OHMSPERVOLTORMORESENSITIVITY,INTHEFOLLOWING
MANNER;CONNECTA1500OHMS10 WATTRESISTOR,PARALLELEDBY
A.15MFD.150VA.C.TYPECAPACITORBETWEENAKNOWNGOODEARTH
GROUND(WATERPIPE,CONDUIT,ETC.)ANDTHEEXPOSEDMETALLIC
PARTS,ONEATATIME.MEASURETHEA.C.VOLTAGEACROSSTHE
COMBINATIONOF1500OHMRESISTORAND15MFDCAPACITOR.
REVERSETHEA.C.PLUGANDREPEATA.C.ANYVOLTAGE
MEASUREMENTSFOREACHEXPOSEDMETALLICPART.VOLTAGE
MEASUREDMUSTNOTEXCEED75VOLTSR.M.S.THISCORRESPONDS
TO0.5MILLIAMPA.C.ANYVALUEEXCEEDINGTHISLIMITCONSTITUTESA
POTENTIALSHOCKHAZARDANDMUSTBECORRECTEDIMMEDIATELY.

GOODEARTHGROUND
SUCHASTHEWATER
PIPE,CONDUIT,ETC.

PLACETHISPROBE
ONEACHEXPOSED
METALPART

SUBJECTGRAPHICSYMBOLS

THELIGHTNINGFLASHWITHAPROWHEADSYMBOL.WI THINAN
EQUILATERALTRIANGLE,ISINTENDEDTOALERTTHESERVICE
PERSONNELTOTHEPRESENCEOFUNINSULATED"DANGEROUS
VOLTAGE"THATMAYBEOFSUFFICIENTMAGNITUDETO
CONSTITUTEARISKOFELECTRICSHOCK.

THEEXCLAMATIONPOINTWITHINANEQUILATERALTRIANGLEIS
INTENDEDTOALERTTHESERVICEPERSONNELTOTHE
PRESENCEOFIMPORTANTSAFETYINFORMATIONINSERVICE
LITERATURE.

SUBJECT:X-RADIATION

1.BESUREPROCEDURESANDINSTRUCTIONSTOALLSERVICEPERSONNEL
COVERTHESUBJECTOF
X-RAYSINCURRENTT.V.RECEIVERSISTHEPICTURETUBE.HOWEVER,
THISTUBEDOESNOTEMITX-RYSWHENTHEHIGHVOLTAGEISATTHE
FACTORYSPECIFIEDLEVEL.THEPROPERVALUEISGIVENINTHE
APPLICABLESCHEMATIC.OPERATIONATHIGHERVOLTAGESMAYCAUSEA
FAILUREOFTHEPICTURETUBEORHIGHVOLTAGESUPPLYAND,UNDER
CERTAINCIRCUMSTANCES,MAYPRODUCERADIATIONINEXCESSOF
DESIRABLELEVELS.

2.ONLYFACTORYSPECIFIEDC.R.TANODECONNECTORSMUSTBEUSED.

DEGAUSSINGSHIELDSALSOSERVEASANX-RAYSHIELDINCOLORSETS,
ALWAYSRE-INSTALLTHEM.

3.ITISESSENTIALTHATSERVICEPERSONNELHAVEAVAILABLEAN

ACCURATEANDRELIABLEHIGHVOLTAGEMETER.THECALIBRATIONOF
THEMETERSHOULDBECHECKEDPERIODICALLYAGAINSTA
REFERENCESTANDARD,SUCHASTHEONEAVAILABLEATYOUR
DISTRIBUTOR.

4.WHENTHEHIGHVOLTAGECIRCUITRYISOPERATINGPROPERLY,THEREIS

NOPOSSIBILITYOFAN
CHASSISISSERVICED,THEBRIGHTNESSSHOULDBERUNUPANDDOWN
WHILEMONITORINGTHEHIGHVOLTAGEWITHAMETERTOBECERTAIN
THATTHEH IGHVOLTAGEDOESNOTEXCEEDTHESPECIFIEDVALUEAND
THATITISREGULATINGCORRECTLY.WESUGGESTTHATYOUANDYOUR
SERVICEORGANIZATIONREVIEWTESTPROCEDURESSOTHATVOLTAGE
REGULATIONISALWAYSCHECKEDASASTANDARDSERVICING
PROCEDUREANDTHATTHEHIGHVOLTAGEREADINGBERECORDEDON
EACHCUSTOMER'SINVOICE.

5.WHENTROUBLESHOOTINGANDMAK INGTESTMEASUREMENTSINA

PRODUCTWITHAPROBLEMOFEXCESSIVEHIGHVOLTAGEAVOIDBEING
UNNECESSARILYCLOSETOTHEPICTURETUBEANDTHEHIGHVOLTAGE
SUPPLYDONOTOPERATETHEPRODUCTLONGERTHANITISNECESSARY
TOLOCATETHECAUSEOFEXCESSIVEVOLTAGE.

6.REFERTOHV.B+ANDSHUTDOWNADJUSTMENTPROCEDURES

DESCRIBEDINTHEAPPROPRIATESCHEMATICANDDIAGRAMS(WHERE
USED).

X-RADIATION.THEONLYPOTENTIALSOURCEOF

X-RADIATIONPROBLEM.EVERYTIMEACOLOR

SUBJECT:IMPLOSION

1.ALLDIRECTVIEWEDPICTURETUBESAREEQUIPPEDWITHANINTEGRAL

IMPLOSIONPROTECTIONSYSTEM,BUTCARESHOULDBETAKENTO
AVOIDDAMAGEDURINGINSTALLATION,AVOIDSCRATCHINGTHETUBE.IF
SCRATCHEDREPLACEIT.

2.USEONLYREC OMMENDEDFACTORYREPLACEMENTTUBES.

SUBJECT:TIPSONPROPERINSTALLATION

1.NEVERINSTALLANYPRODUCTINACLOSED-INRECESS.CUBBYHOLEOR

CLOSELYFITTINGSHELFSPACE,OVERORCLOSETOHEATDUCT,ORIN
THEPATHOFHEATEDAIRFLOW.

2.AVOIDCONDITIONSOFHIGHHUMIDITYSUCHAS:OUTDOORPATIO

INSTALLATIONSWHEREDEWISAFACTOR,NEARSTEAMRADIATORS
WHERESTEAMLEAKAGEISAFACTOR,ETC.

3.AVOIDPLACEMENTWHEREDRAPERIESMAYOBSTRUCTREARVENTING.

THECUSTOMERSHOULDALSOAVOIDTHEUSEOFDECORATIVE
SCARVESOROTHERCOVERINGSWHICHMIGHTOBSTRUCTVENTILATION.

4.WALLANDSHELFMOUNTEDINSTALLATIONSUSINGACOMMERCIAL

MOUNTINGKI T,MUSTFOLLOWTHEFACTORYAPPROVEDMOUNTING
INSTRUCTIONS.APRODUCTMOUNTEDTOASHELFORPLATFORMMUST
RETAINITSORIGINALFEET(ORTHEEQUIVALENTTHICKNESSINSPACERS)
TOPROVIDEADEQUATEAIRFLOWACROSSTHEBOTTOM.BOLTSOR
SCREWSUSEDFORFASTENERSMUSTNOTTOUCHANYPARTSOR
WIRING.PERFORMLEAKAGETESTONCUSTOMIZEDINSTALLATIONS.

5.CAUTIONCUSTOMERSAGAINSTTHEMOUNTINGOFAPRODUCTON

SLOPINGSHELFORATILTEDPOSITION,UNLESSTHEPRODUCTIS
PROPERLYSECURED.

6.APRODUCTONAROLL-ABOUTCARTSHOULDBESTABLEONITS

MOUNTINGTOTHECARTCAUTIONTHECUSTOMERONTHEHAZARDSOF
TRYINGT OROLLACARTWITHSMALLCASTERSACROSSTHRESHOLDS
ORDEEPPILECARPETS.

7.CAUTIONCUSTOMERSAGAINSTTHEUSEOFACARTORSTANDWHICH

HASNOTBEENLISTEDBYUNDERWRITERSLABORATORIES,INC.FORUSE
WITHTHEIRSPECIFICMODELOFTELEVISIONRECEIVEROR
GENERICALLYAPPROVEDFORUSEWITHTV'SOFTHESAMEORLARGER
SCREENSIZE.

8.CAUTIONCUSTOMERSAGAINSTTHEUSEOFEXTENSIONCORDS.EXPLAIN
THATAFORESTOFEXTENSIONSSPROUTINGFROMASINGLEOUTLET
CANLEADTODISASTROUSCONSEQUENCESTOHOMEANDFAMILY.

SERVICINGPRECAUTIONS

CAUTION:BeforeservicingtheDVDcoveredbythis
servicedataanditssupplementsandADDENDUMS,read
andfollowthe:if
unforeseencircumstancescreateconflictbetweenthe
followingservicingprecautionsandanyofthesafety
precautionsinthispublications,alwaysfollowthesafety
precautions.

RememberSafetyFirst:

SAFETYPRECAUTIONSNOTE

GeneralServicingPrecautions

1.AlwaysunplugtheDVDACpowercordfromtheAC
powersourcebefore:

(1)Removingorreinstallinganycomponent,circuitboard,

module,oranyotherassembly.

(2)Disconnectionorreconnectinganyinternalelectrical

plugorotherelectricalconnection.

(3)Connectingatestsubstituteinparallelwithan

electrolyticcapacitor

Caution:

polarityinstallationofelectrolyticcapacitorsmay
resultinanexplosionhazard.

2.DonotspraychemicalsonornearthisDVDoranyofits

assemblies.

3.Unlessspecifiedotherwiseinthisservicedata,clean

electricalcontactsbyapplyinganappropriatecontact
cleaningsolutiontothecontactswithapipecleaner,
cotton-tippedswab,orcomparablesoftapplicator.

Unlessspecifiedotherwiseinthisservicedata,
lubricationofcontactsisnotrequired.

4.Donotdefeatanyplug/socketB+vo ltageinterlockswith

witchinstrumentscoveredbythisservicemanualmight
beequipped.

5.DonotapplyACpowertothisDVDand/oranyofits

electricalassembliesunlessallsolid-statedeviceheat
sinksarecorrectlyinstalled.

Awrongpartsubstitutionorincorrect

ElectrostaticallySensitive(ES)Devices

Somesemiconductor(solidstate)devicescanbedamaged
easilybystaticelectricity.Suchcomponentscommonlyare
calledElectrostaticallySensitive(ES)Devices.Examplesof
typicalESdevicesareintegratedcircuitsandsomefield
effecttransistorsandsemiconductorchipcomponents.

Thefollowingtechniquesshouldbeusedtohelpreducethe
incidenceofcomponentdamagecausedbystaticelectricity.

1.Immediatelybeforehandlinganysemiconductor
componentorsemiconductor-equippedassembly,drain
offanyelectrostaticchargeonyourbodybytouchinga
knownearthgro und.Alternatively,obtainandweara
commerciallyavailabledischargingwriststrapdevice,
whichshouldberemovedforpotentialshockreasons
priortoapplyingpowertotheunitundertest.

2.AfterremovinganelectricalassemblyequippedwithES

devices,placetheassemblyonaconductivesurface
suchasaluminumtoil,topreventelectrostaticcharge
builduporexposureoftheassembly.

3.UseonlyaGROUNDED-tipsolderingirontosolderor

unsolderESdevices.

4.Useonlyananti-staticsolderremovaldevice.Some

solderremovaldevicesnotclassifieda"anti-static"can
genera teelectricalchargessufficienttodamageES
devices.

5.Donotusefreon-propelledchemicals.Thesecan

generateelectricalchargesufficienttodamageES
devices.

6.DonotremoveareplacementESdevicefromits

protectivepackageuntilimmediatelybeforeyouare
readytoinstallit.(MostreplacementESdevicesare
packagedwithleadselectricallyshortedtogetherby
conductivefoam,aluminumfoil,orcomparable
conductivematerial.)

6.Alwaysconnecttestinstrumentgroundleadtothe
appropriategroundbeforeconnectionthetest
instrumentpositivelead.Alwaysremovethetest
instrumentgroundleadlast.

InsulationCheckingProcedure

DisconnecttheattachmentplugtromtheACoutletandturn
thepoweron.Connectaninsulationresistancemeter(500V)
tothebladesoftheattachmentplug.Theinsulation
resistanc ebetweeneachbladeoftheattachmentplugand
accessibleconductiveparts(Note1)shouldbemorethan
1Mohm.

Note1:

panels,inputterminals,Earphonejacks,etc.

AccessibleConductivePartsincludingMetal

7.Immediatelybeforeremovingtheprotectivematerial
fromtheleadsofareplacementESdevice,touchthe
protectivematerialtothechassiso rcircuitassembly
intowhichthedevicewillbeinstalled.

Caution:Besurenopowerisappliedtothechassisor
circuit,andobserveallothersafetyprecautions.

8.Minimizebodilymotionswhenhandlingunpackaged

replacementESdevices.(Normallyharmlessmotion
suchasthebrushingtogetherofyourclothesfabricorthe
liftingofyourfootfromacarpetedfloorcangenerate
staticelectricitysufficienttodamageanESdevice.)

TABLEOFCONTENTS

1.CONTROLSANDFUNCTIONS1

2.ELECTRICALADJUSTMENTS

3.ELECTRICALTROUBLESHOOTINGGUIDE

4.WAVEEFORMSON VIDEOCIRCUIT

5.ACTIONOF PORT

6.VOLTAGECHART

7.CIRCUIT DIAGRAM

8.COMPONENTSLOCATIONGUIDEONPCBBOTTOMVIEW

9.DISASSEMBLY

10.ELECTRICALPARTS LIST

4

5
16
22
26
30
34
40
41

1. CONTROLS AND FUNCTIONS

FRONT PANEL

3 7 4 5

1

1

POWER

2

DISC TRAY

3

OPEN/CLOSE

4

PLAY

5

STOP

6

SKIP/SEARCH

9

7

PAUSE

8

DISPLAY

9

REMOTE SENSOR

628

1

DISPLAY

program indicator

CD indicator

Press , the brightness of the display is reduced by half; press it once more, the display

pause indicator

play indicator

DVD indicator

DIMMER

title indicator

remain indicator

chapter/track

indicator

title/chapter/track

indicator

lock indicator

hour

indicator

indicator

minute

indicator

angle

Dolby digital

indicator

DIGITAL

second

indicator

repeat play

indicator

disc recording

resume

indicator

track calendar

format

becomes dark. Press the button again, the display resumes brightness.

REAR PANEL

1

4

1

AUDIO OUT1 R

2

AUDIO OUT1 L
VIDEO OUT1

3
4

AUDIO OUT2 R
AUDIO OUT2 L

5

2 3

5

6

7

9

8

10

11

6

VIDEO OUT2
S-VIDEO

7

COAXIAL

8
9

OPTICAL
POWER SUPPLY CORD

10

EURO AV JACK

11

2

NAMES AND LAYOUT OF REMOTE CONTROLS

30

1

2

3

4

5

6

7
8

9

10

11
12

13

14

29

28

27
26

25
24

23

22

21

20

19

18

17

16

15

OSD

1

1
2

DIMMER

3

NUMBER BUTTONS

4

FF/FR

5

SET UP

6

TITLE

7

PLAY/ENTER

8

PREV/NEXT(SKIP/SEARCH)

9

STOP

10

DIRECTIONS

11

SYSTEM

12

LANGUAGE

13

MUTE

14

VOLUME(-/+)

15

SUBTITLE

16

AUDIO MODE

17

A-B REPEAT

18

REPEAT

19

MENU

20

PAUSE/STEP

21

SLOW PLAY
ZOOM

22
23

REMAIN

24

RESUME

25

TIME SEARCH

26

DIGEST

27

PLAY MODE

28

ANGLE

29

OPEN/COLSE

30

REMOTE TRANSMITTER

3

2.ELECTRICALADJUSTMENTS

ALLCIRCUITSNEEDN'TADJUSTIFYOUFINDCLOCK(27.000MHz)

ISCHANGED,ONLYTRIMCAPC004BESIDETHECRYSTALOSCG102.

4

3.ElectricalTroubleShootingGuide

Connectionoftheunitiscorrect.

Settingoftheunitiscorrect

Ispowernormal?

Yes

Isfluorescedisplaycorrect?

Yes

Isopen/closenormal?

Yes

Candiscberead?

Yes

Isvideonormal?

Yes

No

No

No

No

No

Refertopowerguide.

Refertodisplay.guide

Refertoopen/close.guide

Refertoreaddisc.guide

Refertovideo.guide

Isaudionormal?

Yes

Normaloperation.

No

Refertoaudio.guide

5

APowerCircuitabnormal

START

IsC328AC220V?

Yes

F301isopen.

No

Powercordisn'tinsertedfirmly

XP301isopen.
XP302isopen.

orpowercordisopen.

IsC301DC310V?

Yes

Are2,3pinofN301resistance

highimpedance?

Yes

Aretransformersecondary

6V,15Voutput?

Yes

IsXP303normal?

Yes

No

No

No

No

Checkcommutecircuit.

CheckL301andL302.

ReplaceN301.

Checkiftransformerisdamaged.
Checksecondarycommutecircuit.
Check secondaryfeedbackcircuit.

Checkifsecondaryshort.

CheckV304.

Checkregulatedcircuit.

CheckN302andperipheral

components.

Normal

6

BDisplayabnormal

START

Doesthescreen

appear?

Yes

Isdisplaynormal?

Yes

Normal

No

No

CheckifvoltageofscreenF1andF2is3.3V.

Checkifvoltageof34pinofUPD16311is-24V.

CheckgroundednegativevoltageofscreenF1andF2.

ReplaceUPD16311.

Checkifconnectioncordbetweenscreenand

mainboardisbroken?

CheckifUPD16311pinisconnected.

Checkifpinofscreenisconnected.

7

COpen/closeabnormal

8

DReaddiscabnormal

DISCIN

Focuson?

Yes

Islasernormal?

Yes

Doesthediscturn?

Yes

CanTOCberead?

Yes

Normal

No

No

No

No

Refertofocusguide.

Refertolaser.guide

Refertofocus.guide

RefertoTOC.guide

9

EVideoabnormal

IsvoltageofXS109normal?

Yes

Nopicture,nosound.

Nopicture,havesound.

Havepicture,nocolororcolor
disappearedduringplayback.

Havepicture,butpicture

disappearedduringplayback.

No

Checkconnectionbetween

videoencoderandXS109.

Replacemainboard.

Checkjackofoutputboard

orreplacemainboard.

Checkmainboardandreplace

G102(27MHz).

Checkmainboardandreplace

G102(27MHz).

10