JVC KD-DV5188 User manual

SERVICEMANUAL
COPYRIGHT©2005VictorCompanyof Japan,Limited No.MA173
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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