Technics SL-DV250 User manual

ORDERNO.AD0103078C2
DVD/VideoCD/CD changer
SL-DV250
Colour
(S)....................Silver
Area
EG....................Europe.
System:SC-DV250
Because ofuniqueinterconnecting cables, whena
componentrequires service, send orbring intheentire
system.
Note:Refertotheservice manual forModel No.SA-
DV250 (ORDERNO.AD0103076C2) forinformation
on “ACCESSORIES”and “PACKAGING”.
SPECIFICATIONS
Specification
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Disc played
DVD-Video disc 8 /12 cm single-sided, single-
layer/ 8/12 cm single-sided,
double-layer/ 8/12 cm double-
sided, double-layer
(onelayerperside)
CD(CD-DA, VIDEO-CD) 8 /12 cm discs
CD-R/RW disc 8 /12 cm discs
Audio
Numberofchannels 5.1(FL, FR, SL, SR, C, SW)
Video
Signal system PAL 625/50, PAL 525/60, NTSC
Outputlevel (75 )
Compositevideo 1Vp-p (75 )
S-video Y 1Vp-p (75 )
S-video C 0.3Vp-p (75 )(PAL)/ 0.286Vp-
p (75 )(NTSC)
Pick up
Beam source Semiconductorlaser
Wavelength 658/790 nm
General
Dimensions(W×H×D): 293×89×288 mm
Weight: 2.5kg
PowerSupply: DC10V
PowerConsumption: 12W
Notes:
1.Design and specificationsaresubjectto changewithout
notice.
2.Dimensionsand weightareapproximate.
System/SC-DV250
Sound processor:SH-DV250, Stereo tuner/ amplifier:SA-
DV250, DVD/Video-CD/CDchanger:SL-DV250 , Stereo
cassettedeck:RS-DV250, Speakers:SB-DV250 (front)/ SB-
PC95(center)/ SB-PS95 (surround)(all speakersaremadein
MAES.)
1. BeforeRepair
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Thisequipment(SL-DV250),whichisthecomponentofthissystem, issuppliedwithpowerfrom
thetuner/amplifier(SA-DV250)through thesound processor (SH-DV250). Whenrepairing this
equipmentor checking operation ofthesystem, besuretoconnectthetuner/amplifierand sound
processor withit.
Thisequipment, eveninthestateofitas asingleequipment, permitspowersupplyand operation
check. Whenoperating itas asingleequipmentwithoutthetuner/amplifierand sound processor,
refertotheparagraph of"Measurementsand Adjustments.
2. Precaution of LaserDiode
3. Operating Instructions
4. Handling Precautions forTraverse Deck
Thelaserdiodeinthetraverse deck (optical pickup)may break downduetopotential difference
causedbystaticelectricityofclothes or humanbody.So, becareful ofelectrostaticbreakdown
during repairofthetraverse deck (optical pickup).
4.1. Handling oftraverse deck (optical pickup)
1. Donotgiveconsiderableshock tothetraverse unit(optical
pickup)as ithas anextremelyhigh-precise structure.
2. Whenreplacing theoptical pickup, install theflexiblecableand cut
its shortland withanipper. See theoptical pickup replacement
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procedureinthisTechnical Guide. Beforereplacing thetraverse
unit, removetheshortpinforpreventingstaticelectricityand
install anew unit. Connect theconnectoras shorttimeas possible.
3. Theflexiblecablemaybecutoff ifanexcessiveforce isappliedto
it. Use caution whenhandling thecable.
4. Thehalf-fixedresistorforlaserpoweradjustmentcannotbe
adjusted. Donotturntheresistor.
Fig. 1
4.2. Grounding forelectrostaticbreakdownprevention
1. Humanbodygrounding
Use theanti-staticwrist straptodischargethestaticelectricity
fromyourbody. (Asshownin Fig. 2 .)
2. Worktablegrounding
Putaconductivematerial (sheet) orsteel sheet on thearea where
theoptical pickup isplaced, and ground thesheet.
Caution:
Thestaticelectricityofyourclothes will notbegroundedthrough
thewrist strap. So, take carenottolet yourclothes touchthe
traverse deck (optical pickup). Fig. 2
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5. Operation Checks and Component Replacement
Procedures
-Thissection describes procedures forchecking theoperation of
themajorprintedcircuitboardsand replacing themain
components.
-Forreassemblyafteroperation checks orreplacement, reverse the
respectiveprocedures. Special reassemblyprocedures are
describedonlywhenrequired.
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5.1. Checking fortheDVDmodule(1) P.C.B.
-Check theDVDmodule(1) P.C.B. (Aside) as shownbelow.
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-Check theDVDmodule(1) P.C.B. (Bside) as shownbelow.
5.2. Checking fortheoperation P.C.B.
-Follow the(Step1) -(Step3) ofitem5.1.
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-Check theoperation P.C.B. as shownbelow.
5.3. Checking forthemainP.C.B.
-Follow the(Step1) -(Step3) ofitem5.1.
-Follow the(Step1) -(Step5) ofitem5.2.
-Check themainP.C.B. as shownbelow.
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5.4. Checking fortheDVDmodule(2) P.C.B.
-Follow the(Step1) -(Step3) ofitem5.1.
-Follow the(Step1) -(Step5) ofitem5.2.
-Check theDVDmodule(2) P.C.B. as shownbelow.
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5.5. Replacementforthetraverse ass’y
-Follow the(Step1) -(Step3) ofitem5.1.
-Follow the(Step1) -(Step5) ofitem5.2.
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5.6. Replacementforthedisc tray
-Follow the(Step1) -(Step3) ofitem5.1.
-Follow the(Step1) -(Step5) ofitem5.5.
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5.7. Disassemblyand reassemblyformechanismbase driveunit
-Follow the(Step1) -(Step3) ofitem5.1.
-Follow the(Step1) -(Step13) ofitem5.5.
-Follow the(Step1) -(Step9) ofitem5.6.
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