Jvc-VSDT-2000-Service-Manual电路原理图.pdf

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1、VS-DT2000No.21082May. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.SERVICE MANUALVS-DT2000ContentsSafety precautionsPreventing static electricityImportant for laser productsImportance administering pointon the safetyDisassembly method1-21-31-41-51-71-201-211-221-221-23 35Flow of functional operat

2、ionuntil TOC readError codeMaintenance of laser pickupReplacement of laser pickupDescription of major ICsArea suffixJ - U.S.A.C - CanadaCA-VSDT2000RSP-VSDT2000 SP-VSDT2000 SP-PW2000RM-SVSDT2000J REMOTE CONTROL STANDBY/ONPLAY MODEREPEATFM MODETREBLEBASSSETCANCELSLEEPDIMMERDISPLAYFM/AMCOLOR CLOCK/TIME

3、R OPEN/CLOSEVOLUMEMD/AUX12369101074 58+COMPACT COMPONENT SYSTEMCOMPACT COMPONENT SYSTEMVS-DT20001-21. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unles

4、s authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should

5、not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characterist

6、ics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Part

7、s List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in t

8、he Parts List of Service Manual may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock

9、 and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage currnet check (Electrical shock hazard testing)After re-assembling the product, always perform an isol

10、ation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.Plug the AC line c

11、ord directly into the AC outlet. Using a “Leakage Current Tester“, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Al

12、ternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measur

13、e the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measure

14、ment. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3.

15、 Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(

16、Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.In regard with component parts appearing on the silk-screen printed side

17、 (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the “ “ mark nearby are critical for safety. (This regulation does not correspond to J and C version.)VS-DT20001-3Conductive material (conductive sheet) or i

18、ron plate(caption)Anti-static wrist strapShort landCN601CD servo boardFlexible wire5. Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the

19、CD pickup unit. (If the flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire.Electrostatic discharge (ESD), which occurs when static electricity st

20、ored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.Preventing static electricity1. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the opti

21、cal pickup (laser diode) in devices such as CD players.Be careful to use proper grounding in the area where repairs are being performed. 2. About the earth processing for the destruction prevention by static electricityGround the workbench by laying conductive material (such as a conductive sheet) o

22、r an iron plate over it before placing the traverse unit (optical pickup) on it.2-1 Ground the workbench2-2 Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body.In order to maintain quality during transport and before installation, both sides of the l

23、aser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser d

24、iode. 3. Handling the optical pickup1.2.Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.Remove solder of the short land on the flexible wire after replacing the optical pickup. For specific details, refer to the replacement procedure in the text

25、. Remove the anti-static pin when replacing the traverse unit.Be careful not to take too long a time when attaching it to the connector.Handle the flexible wire carefully as it may break when subjected to strong force.It is not possible to adjust the semi-fixed resistor that adjusts the laser power.

26、 Do not turn it.4. Handling the traverse unit (optical pickup)1.2.3.4.VS-DT20001-4Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are no serviceable parts inside theLa

27、ser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or a

28、re defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.VARNING : Osynlig la

29、serstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen.ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling.ADVARSE

30、L : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling.!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.VS-DT20001-5Caution: For continued protection against risk offire, replace only with

31、same type 1A/125V for F1901,8A/125V for F1902, 3.15A/125V for F1903.This symbolspecifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F1901 comme le meme typeque 1A/125V, F1902 comme le meme type que 8A/125, et 3.15A/125V pour F1903. Ce sont d

32、es fusibles suretes qui functionnes rapide.Importance administering point on the safety Main boardPower amplifier boardF1901F1902F1903VS-DT20001-6Caution: For continued protection against risk offire, replace only with same type 2A/125V for F2901,1.6A/125V for F2911, 1.6A/125V for F2921.This symbols

33、pecifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F2901 comme le meme typeque 2A/125V, F2911 comme le meme type que 1.6A/125, et 1.6A/125V pour F2921. Ce sont des fusibles suretes qui functionnes rapide.F2901Switch boardPower supply boardF

34、2911 F2921VS-DT20001-7Fig.1Fig.2Fig.3Fig.4ABCATop lensTop panelBottom panelBottom panelbbTop panelaFront panel assemblyDisassembly methodRemoving the top lens (See Fig. 1.)From the top side of the main body, remove the four screws A attaching the top lens.Removing the bottom panel(See Figs. 2 and 3.

35、)1.2.3.From the rear side of the main body, remove the three screws B attaching the bottom panel.From the bottom side of the main body, remove the two screws C attaching the bottom panel.Remove the bottom panel in an upward direction.1.2.Slide the top panel toward the rear (direction of the arrow),

36、disengage it from the engagement sections a of the front panel assembly and engagement sections b of the bottom chassis.Remove the top panel in an upward direction.Removing the top panel (See Fig. 4.)Remove the top lens.Remove the bottom panel.VS-DT20001-8Fig.5Fig.6Fig.7CD mechanismassemblyCN801LED

37、boardPush buttonDDGFDClaw cClaws dCN171CN182Wire holderBottom chassisFront panel assemblyClaws dMain boardTie bandCN183CN106Hole onthe bottom chassisFront panel assemblyEReferenceBefore attaching the front panel assembly, pass the card wire of the front panel assembly through the hole on the bottom

38、chassis.After attaching the front panel assembly,bundling the card wire and wires of the frontpanel assembly using a wire holder and tieband.Removing the CD mechanism assembly (See Fig. 5.)1.2.3.4.From the top side of the main body, disengage the claw c of the CD mechanism assembly and then remove t

39、he push button.Remove the five screws D, screw E and screw F attaching the CD mechanism assembly.Disconnect the wire from connector CN801 on the LED board.Remove the CD mechanism assembly in an upward direction.Removing the front panel assembly(See Figs. 6 and 7.)1.2.3.4.5.6.Remove the tie band bund

40、ling the wires of the front panel assembly.Disconnect the wires from connectors CN106 and CN182 on the main board.Disconnect the card wires from connectors CN171 and CN183 on the main board.Remove the wire holder holding the card wire of the front panel assembly.From the front side of the main body,

41、 remove the two screws G attaching the front panel assembly.Disengage the claws d of the front panel assembly from the bottom chassis and then remove the front panel assembly in the direction of arrow. Remove the top lens.Remove the bottom panel.Remove the top panel.Remove the top lens.Remove the bo

42、ttom panel.Remove the top panel.Remove the CD mechanism assembly.VS-DT20001-9Fig.8Fig.9CN101CN111Tie bandTie bandCN102Speaker boardTuner boardRear panelAM antennaterminalFM antennaterminalJHHSpeaker terminal Digital out terminalCD mechanismassembly wireNotchBottom chassisMain boardRemoving the tuner

43、 board(See Figs. 8 and 9.)1.2.3.Disconnect the card wire from connector CN111 on the main board.From the rear side of the main body, remove the two screws H attaching the FM/AM antenna terminals on the tuner board.Take out the tuner board from the bottom chassis.Removing the speaker board(See Figs.

44、8 and 9.)1.2.3.4.Remove the tie bands bundling the wires on the speaker board.Disconnect the wires from connectors CN101 and CN102 on the speaker board.From the rear side of the main body, remove the three screws J attaching the speaker/digital out terminals on the speaker board.Take out the speaker

45、 board from the bottom chassis.Remove the top lens.Remove the bottom panel.Remove the top panel.Remove the CD mechanism assembly.Remove the top lens.Remove the bottom panel.Remove the top panel.Remove the CD mechanism assembly.ReferenceAfter connecting the wires to the speakerboard, bundle them usin

46、g a tie band.Insert the CD mechanism assembly wire intothe notch on the bottom chassis. (See Fig. 8.)VS-DT20001-10Fig.10Fig.11Fig.12Wire clampWire holderEarth wireMain boardCN191CN194CN192CN181Power amplifierboardLMLKMain boardQPower amplifierboardHeat sinkFan motorCN192CN193Hook eHook eRear panelNQ

47、PPPower transformerLBottom chassisReference Attaching the main boardWhen attaching the screw L, attach the earth wire of the main board at the same time.When attaching the screw K, also attach the wire holder together with it.After connecting the wires to the connectors CN192 and CN193 on the power

48、amplifierboard, bundle them using wire holder.ReferenceIt is not necessary to remove the wire from the fan motor.Removing the main board(See Figs. 10 and 11.)1.2.3.4.5.6.7.Disconnect the wire from connector CN192 on the power amplifier board.Disengage the wire clamp bundling the wire of the power tr

49、ansformer.Disconnect the wires from connectors CN181, CN191 and CN194 on the main board.Remove the screw K, which retains the main board, together with the wire holder.Remove the two screws L, screw L and screw M attaching the main board.Remove the two screws N attaching the main board and then remove the rear panel.Take out the main board from the bottom chassis.Remove the top lens.Remove the bottom p