JVC KD-DV5188 Manuel utilisateur

SERVICEMANUAL

2005/3

DVD/CD RECEIVER

MA17320053

KD-DV5188

TABLEOFCONTENTS

1PRECAUTIONS. ... .... ... .. .... .. ... ... ... .. . . ... .. ... ... ... .. .... .. ....... ... ... ... .1-3

2SPECIFICSERVICEINSTRUCTIONS.... .. .... ... .. ... ... ... .... ... .... ... .. ... ... .... .. ..1-6

3DISASSEMBLY... ... ... .. ... ... .... .. .... ... ... .. ... ... .... ... ... ... ... . ... ... ... ... .1-7

4ADJUSTMENT. .. ... .... ... ... ... .. .... .. ... ... ... .. ... . . .. ... ... ... .. .. . .. .. .... .. ..1-21

5TROUBLESHOOTING. .... ... .... .. ... ... ... .. ... .... ... ... ... .. .... .. ... ... . . .... .. ..1-29

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1-2(No.MA173)

SPECIFICATION

Design and specificationsaresubjecttochange withoutnotice.

AUDIOAMPLIFIERSECTION

MaximumPowerOutputFront50Wperchannel

Rear50Wperchannel

ContinuousPowerOutput(RMS)Front19 Wperchannelinto4 ,40 Hzto20 000 Hzatno more

than 0.8%totalharmonicdistortion.

Rear19 Wperchannelinto4 ,40 Hzto20 000 Hzatno more

than 0.8%totalharmonicdistortion.

LoadImpedance4 (4 to8 allowance)

EqualizerControlRangeFrequencies60 Hz,150Hz,400Hz, 1kHz,2.4kHz, 6kHz,15kHz

Level±10 dB

Signal-to-NoiseRatio70 dB

AudioOutputLevelDigital(DIGITALOUT:Optical)Signalwavelength:660 nm

Outputlevel:-21dBmto-15 dBm

Line-OutLevel/Impedance2.5V/20 k load(full scale)

OutputImpedance1k

ColorSystemPAL/NTSC

Video Output(composite)1Vp-p/75

OtherTerminalsLINEIN, CD changer

TUNERSECTION

Frequency RangeFM87.5MHzto108.0MHz

AM531kHzto1602 kHz

FMTunerUsableSensitivity11.3dBf (1.0 kV/75 )

50 dBQuieting Sensitivity16.3dBf(1.8 kV/75 )

AlternateChannelSelectivity(400 kHz)65dB

FrequencyResponse40Hzto15000Hz

StereoSeparation35dB

CaptureRatio1.5dB

AMTunerSensitivity20 kV

Selectivity35dB

DVD/CD PLAYERSECTION

SignalDetection SystemNon-contactopticalpickup (semiconductorlaser)

NumberofChannels2channels(stereo)

Frequency ResponseDVD, fs=48 kHz/96 kHz16 Hzto22 000 Hz

VCD,CD,MP3,WMA16Hzto20 000 Hz

DynamicRange96 dB

Signal-to-NoiseRatio98 dB

Wowand FlutterLessthan measurablelimit

MP3(MPEGAudioLayer3)Max.BitRate:320 kbps

WMA(WindowsMediaAudio)Max.BitRate:192kbps

GENERAL

PowerRequirementOperating VoltageDC 14.4V(11 Vto16 Vallowance)

Grounding SystemNegativeground

AllowableOperating Temperature0pCto+40pC

Dimensions(W IH ID)InstallationSize(approx.)182 mm I52 mm I158 mm

PanelSize(approx.)188 mm I58 mm I11mm

Mass(approx.)1.7kg(excluding accessories)

(No.MA173)1-3

SECTION1

PRECAUTIONS

1.1SafetyPrecautions

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1-4(No.MA173)

1.2Preventing staticelectricity

Electrostaticdischarge(ESD),whichoccurswhen staticelectricitystoredinthe body, fabric, etc. isdischarged, candestroythelaser

diode inthe traverseunit(opticalpickup).Takecaretopreventthiswhen performing repairs.

1.2.1Grounding topreventdamagebystaticelectricity

Staticelectricityinthe workarea can destroythe opticalpickup (laserdiode)indevicessuchasCD players.

Becarefultousepropergrounding inthe area whererepairsarebeing performed.

(1)Groundthe workbench

Ground the workbenchbylayingconductivematerial(suchasaconductivesheet)oran iron plateoveritbeforeplacingthe

traverseunit(opticalpickup)onit.

(2)Groundyourself

Usean anti-staticwriststrap toreleaseanystaticelectricitybuiltup inyourbody.

(3)Handlingthe opticalpickup

Inordertomaintainqualityduring transportandbeforeinstallation,bothsidesof thelaserdiode on the replacement optical

pickup areshorted.Afterreplacement,returnthe shortedpartstotheiroriginalcondition.

(Refertothe text.)

Donotuseatestertochecktheconditionofthelaserdiodeinthe opticalpickup.The tester'sinternalpowersourcecan easily

destroythe laserdiode.

1.3Handling thetraverse unit(opticalpickup)

(1)Beforedisconnecting the flexiblewirefromtheconnector CN101 on the mechanismcontrolboard,soldertheshort-circuitpoints

on the flexiblewire.

Caution:

Ifyou do not followthisinstruction,the DVDpickup maybe damaged.

(2)Disconnectthe flexiblewirefromthe connector CN101 onthe mechanismcontrolboard.

(3)Removethe soldersfromthe short-circuitpointson the flexiblewireafterreplacingthe DVDpickup.

(4)Connecttheflexiblewiretothe connector CN101 on themechanismcontrolboard.

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(No.MA173)1-5

1.4Importantforlaserproducts

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1-6(No.MA173)

SECTION2

SPECIFICSERVICEINSTRUCTIONS

Thisservicemanualdoesnot describeSPECIFICSERVICEINSTRUCTIONS.

(No.MA173)1-7

SECTION3

DISASSEMBLY

3.1Mainbodysection

3.1.1Removing thefrontpanelassembly

(SeeFig.1)

Pushthedetachbutton inthe lowerleftpartofthefrontpanelas-

semblyand removethe frontpanelassembly.

Fig.1

3.1.2Removing thebottomcover

(SeeFig.2)

Reference:

Removethe front panelassemblyasrequired.

(1)Releasethe twojoints a,twojoints band joint c.

(2)Removethebottomcoverfromthe mainbody.

Caution:

Donotdamage the mainboardwhen releasing thejointsusing

ascrewdriverorasimilartool.

Fig.2

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1-8(No.MA173)

3.1.3Removing thefrontchassisassembly

(See Figs.3and 4)

Removethefrontpanelassemblyandbottomcover.

(1)Fromthe frontside ofthe mainbody,removethetwo

screws Aattaching the frontchassisassembly.(See

Fig.3.)

(2)Fromthe bothsidesofthe mainbody,removethe two

screws Battaching the frontchassisassembly.(See

Fig.4.)

(3)Releasethetwojoints dand twojoints e.(See Fig.4.)

Fig.3

Fig.4

3.1.4Removing thesideheatsink

(See Fig.5)

Reference:

Removethe frontpaneland frontchassisassembliesasre-

quired.

Fromtheleftsideofthemainbody,removethe twoscrews Cand

threescrews Dattaching the side heat sink.

Fig.5

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(No.MA173)1-9

3.1.5Removing therearbracket

(SeeFig.6)

Removethe bottomcover.

(1)Fromtheback side ofthe mainbody,removethetwo

screws E, twoscrews E', screw F, twoscrews Gandthree

screws Hattachingthe rearbracket.

(2)Removethe LINEINcablefromthe rearbracketinthedi-

rectionof thearrow.

Reference:

Whenattaching the LINEINcable,insertitinaslotofthe

rearbracketandhang iton awireholder.

Whenattaching the screws E', attachthe cableholderswith

them.

3.1.6Removing themainboard

(See Figs.6and 7)

Removethe front panelassembly, bottomcover, front chassis

assemblyand sideheatsink.

Reference:

Removethe rearbracketasrequired.

(1)Fromthebackside ofthemainbody,removethe three

screws Hattaching the mainboard.(See Fig.6.)

(2)Fromthebottomside ofthemainbody,removethethree

screws Jattachingthe mainboard. (SeeFig.7.)

(3)Disconnectthe connector CN961 on themainboardfrom

the DVDmechanismassemblyand takeoutthemain

boardfromthe mainbody.(See Fig.7.)

Fig.6

Fig.7

3.1.7Removing theDVDmechanismassembly

(SeeFig.8)

Removethe front panelassembly, bottomcover, front chassis

assembly,side heat sinkand mainboard.

(1)Fromtheinside ofthe topchassis,removethethree

screws Kattachingthe DVDmechanismassembly.

(2)Takeoutthe DVDmechanismassemblyfromthe top cha

sis.

Fig.8

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1-10 (No.MA173)

3.1.8Removing themainsub board

(See Figs.9to11)

Removethe frontpanelassembly,bottomcover,front chassis

assembly,side heatsink,mainboardand DVDmechanismas-

sembly.

(1)Fromthe top side ofthe DVDmechanismassembly,re-

movethe twoscrews Lattaching thedustcover.(See

Fig.9.)

(2)Removethe dust coverfromtheDVDmechanismassem-

bly.(See Fig.9.)

Reference:

When attaching the dustcover,align thejoints finthe

holesofthe dustcoverbeforeattaching thescrews L.

(See Fig.9.)

(3)Releasethe lock ofthe connector CN962 on themainsub

boardand disconnectthe cardwire.(See Fig.10.)

(4)Bend thejoint ginthe directionof the arrow.(See Fig.10.)

(5)Removethe twoscrews Mattaching themainsubboard

and removethe mainsubboardfromtheDVDmechanism

assembly.(See Fig.10.)

Reference:

Whenattaching themainsubboard,align the joints hinthe

holesofthe mainsub boardbeforeattaching the screws M.

(See Fig.10.)

Whenthe resolution ofDVDmechanismassemblyisdone

sequentially,removethe twoscrews Nattaching thesupport

bracket. (SeeFig.11.)

Removethecardwirefromthe connector CN401 asre-

quired.(See Fig.11.)

Fig.9

Fig.10

Fig.11

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