Jvc-UXM-3-R-Service-Manual电路原理图.pdf

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1、UX-M3RNo.21059Jan. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.SERVICE MANUALContentsSafety precautionsPreventing static electricityImportant for laser productsDisassembly methodAdjustment methodFlow of functional operationuntil TOC read1-21-31-41-51-141-171-181-181-191-201-29Maintenance of lase

2、r pickupReplacement of laser pickupTrouble shootingDescription of major ICsWiring connectionsUX-M3RArea suffixB - U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeSP-UXM3 CA-UXM3R SP-UXM3DISPLAYMODEPHONESPROGRAMREC STOP/CLEAR PLAY/PAUSEPRE EQ/HBSVOLUMEREPEATSEARCH/TUNINGRANDOMCD TUNE

3、R TAPEBANDMICRO COMPONENT SYSTEM UX-M3RFULL LOGIC DECKCD SYNCHRO RECORDINGTIMERON/OFFSETREMAIN/RDS MODEEJECTINTRO/RDSSEARCHPRESETOPEN/CLOSESTANDBY/ONCD/RANDOM TAPEDISPLAYMODEPROGRAMRECSLEEP PRE UPTIMERBEAT CUTSTANDBY/ON+VOLUMETUNER/BANDREPEAT/PRE DOWNINTRO/RDS SEARCHREMAIN/RDS MODERM-SUXM3R REMOTE C

4、ONTROLMUTINGPRE EQ/HBSMICRO COMPONENT SYSTEMUX-M3R1-21. 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 unless authorized in writing by the manufacturer. R

5、eplacement 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 not be made. Any design alterations or additio

6、ns 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 characteristics. These characteristics are often not evide

7、nt 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 Parts List of Service Manual. Electrical component

8、s 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 the Parts List of Service Manual may create sho

9、ck, 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 and fire hazard. When service is required, th

10、e 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 isolation check on the exposed metal parts of the

11、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 cord directly into the AC outlet. Using a “Leak

12、age 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.).Alternate check methodPlug the AC line cord dire

13、ctly 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.Measure the AC voltage across the resistor with the

14、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 measurement. Voltage measured any must not exceed 0.7

15、5 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. Repairs must be made in accordance with the r

16、elevant 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(Having 1000 ohms/volts,or more sensitivity)150

17、0 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 (parts side) of the PWB diagrams, the parts t

18、hat 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.)UX-M3R1-3Short landCD pickup unitConnectorConductive material (conductive sheet) or iron plate(captio

19、n)Anti-static wrist strap5. 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 card wire is disconnected from the connector on the CD pickup unit. (If the card wire is disconnected without appl

20、ying solder, the CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the card wire.Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser di

21、ode 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 optical pickup (laser diode) in devices such as CD players.Be careful to u

22、se 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) or an iron plate over it before placing the traverse unit (optical pick

23、up) 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 laser diode on the replacement optical pickup are shorted. After replac

24、ement, 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 diode. 3. Handling the optical pickup1.2.Do not subject the traverse un

25、it (optical pickup) to strong shocks, as it is a sensitive, complex unit.Remove solder of the short land on the card wire after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit.Be careful n

26、ot to take too long a time when attaching it to the connector.Handle the card 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. Do not turn it.4. Handling the traverse unit (optical pickup)1.2.3.4.UX-M3R1-

27、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 theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if i

28、t 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 are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety

29、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 laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO :

30、 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.ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsette

31、lse for strling.REPRODUCTION AND POSITION OF LABELSWARNING LABELCLASS 1LASER PRODUCT!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.UX-M3R1-5Fuse(F903)1A 250VFuse(F901)1A 250VHeat sinkSoldered part aAPower boardFuse(F902)2A 250VFi

32、g.1Fig.2Main boardPower amplifier IC(IC401)Replacing the fuses (See Fig. 1.)Remove the left side panel according to its disassembly method (see Figs. 5 and 6).Fuses are located inside the left side panel.Disassembly methodReplacement of the fuses and power amplifier ICCaution Be sure to replace the

33、required fuseswith designated ones.Replacing the power amplifier IC on the main board (See Fig. 2.)1.2.Remove the main board according to its disassembly method (see Figs. 17 and 18).Remove the two screws A that attach the power amplifier IC onto the heat sink.In order to replace the power amplifier

34、 IC, remove the solder from soldered part a on the back side of the main board.UX-M3R1-6Fig.3Fig.4BBC(Long)C(Long)Right sidepanelFig.5BBC(Long)C(Long)Right sidepanel1Claw bFig.6Left sidepanelLeft sidepanel3Claw c24Removing the right side panel(See Figs. 3 and 4.)1.2.From the right side of the main b

35、ody, remove the three screws B and three screws C retaining the right side panel.Slide the right side panel toward the rear (in the direction of arrow 1) until the claw b at the back of the panel is hooked by the chassis and then lift the panel upward (in the direction of arrow 2) to remove it.Remov

36、ing the left side panel(See Figs. 5 and 6.)1.2.From the left side of the main body, remove the three screws B and three screws C retaining the left side panel.Slide the left side panel toward the rear (in the direction of arrow 3) until the claw c at the back of the panel is hooked by the chassis, a

37、nd then lift the panel upward (in the direction of arrow 4) to remove it.UX-M3R1-7DDHFig.8Fig.11Fig.10Fig.9Fig.7Lift the rearpart to remove.Top cover(To be loosened)Rear panel121Ear phoneboardConnector on thecassette switchboardPower boardTie bandCN902CN402CN608CD mechanismassemblyFront panel assemb

38、lyHook dHook dFFFGGECD mechanismassemblyCN607ChassisCN201Removing the top cover(See Figs. 7 and 8.)1.2.From the back side of the main body, loosen the two screws D retaining the top cover.Lift the rear part of the top cover to remove it.Removing the front panel assembly(See Figs. 9 to 11.)1.2.3.4.5.

39、6.7.8.9.Remove the tie band bundling the wires.Disconnect the wire from the connector CN902 on the power board.Disconnect the wire from the connector on the cassette switch board.Remove the screw E retaining the bracket on the ear phone board.Disconnect the wires from the two connectors CN201 and CN

40、402 on the main board.Disconnect the wires from the two connectors CN607 and CN608 on the CD & MCU board.Remove the four screws F and the two screws G retaining the bracket of the CD mechanism assembly from the left and right.Remove the screw H retaining the front panel assembly from the bottom side

41、 of the main body.While opening the hooks d to the left and right of the lower part of the front panel assembly (in the direction of arrows 1), slide the front panel assembly toward the front (in the direction of arrow 2).Remove the left and right side panels.Remove the left and right side panels.Re

42、move the top cover.Note After assembly, apply a locking agent to the screws F and G.UX-M3R1-8KFig.13Fig.12CD & MCU boardCD mechanism assemblyCD & MCU boardCD & MCU boardJCN701CN603Tie bandKFig.14Main boardCN601CN602StudRemoving the CD mechanism assembly (See Figs. 12 to 14.)1.2.3.4.5.Remove the left

43、 and right side panels.Remove the top cover.Remove the front panel assembly.Disconnect the wires from the four connectors CN601, CN602, CN603 and CN701 on the CD & MCU board.From the left side of the main body, remove the tie band bundling the wires.Loosen the screw J retaining the main board.From t

44、he left and right sides of the main body, remove the four screws K retaining the bracket.Slide the CD mechanism assembly toward the front and remove it from the studs of the main board.UX-M3R1-9Fig.17Fig.16Fig.15Rear panelSpeaker terminalMLStudStudStudChassisCN901Power boardPower transformerMain boa

45、rdFig.18NChassis Heat sinkSoldered part eMain boardRadio pliers, etc.Power boardChassisPower transformerFM antenna wireRemoving the power board (See Figs. 15 and 16.)1.2.3.Remove the left and right side panels.Disconnect the wire from the connector CN901 on the power board.Remove the two screws L re

46、taining the chassis .Remove the power board by pinching the two studs retaining the board using radio pliers, etc.Removing the main board(See Figs. 17 and 18.)1.2.3.4.Remove the left and right side panels.Remove the top cover.Remove the front panel assembly.Remove the CD mechanism assembly.Remove th

47、e two screws M retaining the speaker terminal of the main board.From the top side of the main body, remove the screw N retaining the heat sink of the main board.Remove the solder from the soldered part e that attaches the FM antenna wire to the main board.Slide the main board toward the front to rem

48、ove it from the chassis.Note After assembly, apply a locking agent tothe screw N.UX-M3R1-10Fig.20Fig.21Fig.22Fig.19RPTSPQUCassette doorClaw fClaw gClaw hDisengage the spring sothat it comes to the frontof the claw h.Cassette door coverFront panel assemblyFront panel assemblyFront panel assemblyArm s

49、ection iArm section kShaft section jSpringShaft section mCassette doorsttoperCassette doordamperCassettemechanismassemblyDamper brackerKey boardSpringBracketRREC/PB head wireTie bandRemoving the key board(See Fig. 19.)Remove the ten screws P retaining the key board.Removing the cassette door(See Figs. 21 and 22.)1.2.3.4.5.Open the cassette door, disengage the spring hooked across t