JVC-MXK15R-cs-sm 维修电路原理图.pdf

Flow of functional operation until TOC readMaintenance of laser pickupReplacement of laser pickupDescription of major ICsSafety precautionsImportant for laser productsPreventing static electricityDisassembly methodAdjustment methodContents1- 21- 31- 41- 51-191-211-221-221-23 No.21138 Dec.2002 MX-K10R/K30R/K15RSERVICE MANUALCOMPACT COMPONENT SYSTEMMX-K10R/K30R/K15RCOPYRIGHT 2002VICTOR COMPANY OF JAPAN, LTD.Area SuffixE .Continetal EuropeEN .Northern EuropeB .U.K.EV .E. Europe/RussiaCD-R/RW PLAYBACK3-CDPLAY & EXCHANGEACTIVEBASS EX.EJECTEJECTREC / PLAYBCD SYNCHRO RECORDINGPLAYAFULL - LOGI C CONTROLAUXCDTAPEFM / A MCD 3CD 2CD 1COMPACT COMPONENT SYSTEM MX-K30R1 BIT DUAL D/ACONVERTERPROGRAMSOUND MODEREPEATPANDOMPRESETTUNINGSTCANCELPHONESREC START / STOPCD REC STARTDUBBINGSETANDBY/ONECOSTANDBY/ DEMOVOLUMEDISC SKIPROCKICLASSCPOPCLOCK /TIMERTAPE A / BSELECTPTY / EONDISPLAY MODEFM MODEFM /AMAUXSLEEPSTANDBY/ONCD1CD2CD3SOUNDSELECTPTY/EONMODEDISPLAYMODEACTIVEBASS EX.FADEMUTINGVOLUMEPROGRAM/RANDOMREPEATTAPEA/BTAPECDBASS-REFLEXBASS-REFLEXCD-R/RW PLAYBACK3-CDPLAY & EXCHANGEACTIVEBASS EX.EJECTEJECTREC / PLAYBCD SYNCHRO RECORDINGPLAYAFULL - LOGI C CONTROLAUXCDTAPEFM / A MCD 3CD 2CD 1COMPACT COMPONENT SYSTEM MX-K15R1 BIT DUAL D/ACONVERTERPROGRAMSOUND MODEREPEATPANDOMPRESETTUNINGSTCANCELPHONESREC START / STOPCD REC STARTDUBBINGSETANDBY/ONECOSTANDBY/ DEMOVOLUMEDISC SKIPROCKICLASSCPOPCLOCK /TIMERTAPE A / BSELECTPTY / EONDISPLAY MODEFM MODEFM /AMAUXSLEEPSTANDBY/ONCD1CD2CD3SOUNDSELECTPTY/EONMODEDISPLAYMODEACTIVEBASS EX.FADEMUTINGVOLUMEPROGRAM/RANDOMREPEATTAPEA/BTAPECDBASS-REFLEXBASS-REFLEXCD-R/RW PLAYBACK3-CDPLAY & EXCHANGEACTIVEBASS EX.EJECTEJECTREC / PLAYBCD SYNCHRO RECORDINGPLAYAFULL - LOGI C CONTROLAUXCDTAPEFM / A MCD 3CD 2CD 1COMPACT COMPONENT SYSTEM MX-K10R1 BIT DUAL D/ACONVERTERPROGRAMSOUND MODEREPEATPANDOMPRESETTUNINGSTCANCELPHONESREC START / STOPCD REC STARTDUBBINGSETANDBY/ONECOSTANDBY/ DEMOVOLUMEDISC SKIPROCKICLASSCPOPCLOCK /TIMERTAPE A / BSELECTPTY / EONDISPLAY MODEFM MODEFM /AMAUXSLEEPSTANDBY/ONCD1CD2CD3SOUNDSELECTPTY/EONMODEDISPLAYMODEACTIVEBASS EX.FADEMUTINGVOLUMEPROGRAM/RANDOMREPEATTAPEA/BTAPECD SP-MXK10CA-MXK10RSP-MXK10SP-MXK15CA-MXK15RSP-MXK15SP-MXK30CA-MXK30RSP-MXK30MX-K30RMX-K10RE .Continetal EuropeEN .Northern EuropeEV .E. Europe/RussiaMX-K15REV .E. Europe/RussiaRadioFans.CN 收音机爱 好者资料库1-2 Safety PrecautionsIn regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, theparts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the “ ” marknearby are critical for safety.When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.(Except the J and C version) Warning1. 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 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.! CAUTION!1. This design of this product contains special hardware and many circuits and components specially orsafety purposes. For continued protection, no changes should be made to the original design unlessauthorized in writing by the manufacturer. Replacement parts must be identical to those used in theoriginal 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 theproduct should not be made. Any design alterations or additions will void the manufacturers warrantyand will further relieve the manufacture of responsibility for personal injury or property damage resultingtherefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics.These characteristics are often not evident from visual inspection nor can the protection afforded bythem 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 Listof Service Manual. Electrical components having such features are identified by shading on theschematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacementwhich does not have the same safety characteristics as the recommended replacement parts shownin the 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 beseparated from live parts, high temperature parts, moving parts and/or sharp edges for the preventionof electric shock and fire hazard. When service is required, the original lead routing and dress shouldbe 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 ofthe 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 lineisolation transformer during this check.?Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure theleakage current from each exposed metal parts of the cabinet, particularly any exposed metal parthaving a return path to the chassis, to a known good earth ground. Any leakage current must notexceed 0.5mA AC (r.m.s.)?Alternate check method Plug the AC line cord directly into the AC outlet.Use an AC voltmeter having, 1,000 ohms per voltor more sensitivity in the following manner. Con-nect a 1,500 10W resistor paralleled by a 0.15 FAC-type capacitor between an exposed metal partand a known good earth ground. Measure the ACvoltage across the resistor with the AC voltmeter. Move the resistor connection to each exposedmetal part, particularly any exposed metal parthaving a return path to the chassis, and meausrethe AC voltage across the resistor. Now, reversethe plug in the AC outlet andrepeat eachmeasurement. Voltage measured Any must notexceed 0.75 V AC (r.m.s.). This corresponds to0.5 mA AC (r.m.s.).!Burrs formed during molding may beleft over on some parts of thechassis. Therefore, pay attention tosuch burrs in the case of preformingrepair of this system.RadioFans.CN 收音机爱 好者资料库1-3Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open andinter lock failed or defeated. Avoid direct exposureto beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replacethe complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisiblelaser radiation and is equipped with safety switcheswhich prevent emission of radiation when the draweris open and the safety interlocks have failed or aredefeated. It is dangerous to defeat the safetyswitches.5.CAUTION : If safety switches malfunction, the laseris able to function.6.CAUTION : Use of controls, adjustments or perfor-mance of procedures other than those specifiedherein may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS WARNING LABEL !CAUTION Please use enough caution notto see the beam directly or touchit in case of an adjustment oroperation check.VARNING : Osynlig laserstrlning r denna del rppnad och sprren r urkopplad. Betraktaej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa oletalttiina nkymttmlle lasersteilylle. lkatso steeseen.ADVARSEL : Usynlig laserstrling ved bning, nrsikkerhedsafbrydere er ude af funktion.Undg udsttelse for strling.ADVARSEL : Usynlig laserstrling ved pning, nrsikkerhetsbryteren er avslott. Unngutsettelse for strling.1-4Preventing static electricity1. Grounding to prevent damage by static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. isdischarged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent thiswhen performing repairs.2. About the earth processing for the destruction prevention by static electricityIn the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the staticelectricity of the work environment.Be careful to use proper grounding in the area where repairs are being performed.2-1 Ground the workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plateover it before placing the traverse unit (optical pickup) on it.2-2 Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body.3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on thereplacement optical pickup are shorted. After replacement, return the shorted parts to their originalcondition. (Refer to the text.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internalpower source can easily destroy the laser diode.4. Handling the CD changer unit (optical pickup)1. Do not subject the CD changer unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specificdetails, refer to the replacement procedure in the text.Remove the anti-static pin when replacing the CD changerunit. Be careful not to take too long a time when attaching itto the connector.3. Handle the flexible cable carefully as it may break whensubjected to strong force.4. It is not possible to adjust the semi-fixed resistor that ad-justs the laser power. Do not turn it.Attention when traverse unit is decomposed* Please refer to Disassembly method in the text for pick up and how to detach the CD changer mechanism.1. Remove the CD changer unit.2. Disconnect the harness from connector on the CD motorboard.3. Solder is put up before the card wire is removed from connectorCn601on the main board as shown in Fig.1 and Fig. 2. (When the wire is removed without putting up solder, the CDpick-up assembly might destroy.)4. Please remove solder after connecting the card wire withCN601 when you install picking up in the substrate.1-5Disassembly methodCommence disassembly of this set by removing the main units and then proceed to the components andassemblies inside the units. Replacement of the fuses and the power IC? Top cover? CD changer unit? Front panel assembly? Chassis unit? CD changer unit? Removing the main PCB? Removing the CD changer mechanism assembly? Removing the CD pickup? Replacing the loading motor and belt of the CD changer tray? Replacing the CD tray rotor belt of CD changer, and removing the motor? Front panel assembly? Removing the cassette deck mechanism? Removing the earphone jack PCB? Removing the control/FL PCB? Removing the switch PCB and ACTIVE BASS EX. switch PCB? Removing the cassette deck main motor, and replacing the main belts? Removing the leaf switches of the cassette deck mechanism? Removing the cassette deck heads? Chassis unit? Removing the 3-pin regulator? Removing the power amp and supply PCB and the Power Trans PCB? Removing the sub power PCB1-6Replacement of the fuses and the power IC? Replacing the fuses (See Fig.1, Fig.4)? Prior to performing the following procedure, removethe left side BOARD and remove tuner PCB (Fig.4,BB)1. Replace the fuses inside.Caution Be sure to use fuses with the specified ratings.? Replacing the power IC (See Fig.2 to 3)? Prior to performing the following procedure, removethe top cover.1. Remove the two screws A from the heat sinkbetweenthe power IC.2. Remove the solder fixing the power IC.Fuse (F952)T1.6AL 250VFW981Fuse(F981)T1AL 250VCN981For CA-MXK10R/15R Fig.1(A)Component SIDEFuse(F952)T1.6AL 250VFuse (F981)T2AL 250VCN981For CA-MXK30R Fig.1(B)Component SIDEWAFor CA-MXK10R/15R Fig.2wAFor CA-MXK30R Fig.3CN981CAUTION(dont removethe safety sheetcover )Fuse(F981)T1AL 250VFuse(F952)T1.6AL 250VFor CA-MXK10R/15R Fig.1(A)BOTTOM SIDEFW981CN981CAUTION(dont removethe safety sheetcover )Fuse(F952)Fuse HoleHOLEFW951For CA-MXK30R Fig.1(B)BOTTOM SIDEFuse (F981)T2AL 250V1-7? Replacing the heat sink cover1. Remove the six screws B from the back panel.2. Pull the heat sink cover outward.? Removing the top cover and two sides BOARD (See Fig.5 and 6)1. Remove the six screws C that retain the top cover from therear of the body.2. Remove the eight screws C and D that retain the top fromthe two sides of the body.3. Remove the top cover from the body by lifting it toward therear.BBBFor CA-MXK30R Fig.4For CA-MXK10R/K30R Fig.6(A)For CA-MXK15R Fig.5(B)For CA-MXK10R/K30R Fig.5(A)1-8? Removing the CD changer unit (See Fig.7 to 10)?Prior to performing the following procedures, removethe top cover and both sides BOARD.Caution Although the CD mechanism unit can beremoved without removing the CD traypanel, it is still recommended to remove itin order to prevent damage.a. From the front panel side of this set, push in the sec-tions marked with arrows and pull out the CD traytoward the front.b. Remove the CD tray panel by pushing both of its ex-tremities upward in the direction of the arrows.c. Push the CD tray deep into the set.1. Disconnect the card wires from the CD PCB CN703and CN203.2. From the rear of the set, remove the two screws Eand two serews G on the front panel left and rightside.3. Handle the CD changer unit rear, take out unit.For CA-MXK15R Fig.6(B)1-9For CA-MXK10R/30R Fig.9(A)For CA-MXK15R Fig.9(B)1-10? Removing the front panel assembly (See Fig.11 and 12)?Prior to performing the following procedures, removethe top cover and both sides board.?Also remove the CD changer unit.1. Disconnect the parallel wire and card wire from theconnectors CN702,CN701,CN101on the power ampand supply PCB.2. Remove the two screws H retaining the front panelassembly onto the bottom of the body.3. Remove the screw I retaining the cassette deckmechanism and then remove then GND lug b thatcomes from the power amp and supply PCB.4. Disengage the claws c on both sides at the bottomof the front panel assembly and then remove theassembly.1-11? Removing the CD PCB (See Fig.13 and 14)?Prior to performing the following procedures, removethe top cover and both sides board.?Also remove the CD changer unit.1. Disconnect the wires from CN603A, CN603B andCN604 on the CD PCB, which is located on the backside of the CD changer unit.2. The two screws J that retain the CD PCB shouldbe removed.3. Remove the CD PCB by pulling it toward the sidewhere the CN601 is located.4. Using solder, short the CD pickup to connect to shortround.Caution After re-connecting the wires, be sure toremove the