Jvc-XMR-700-SL-Service-Manual电路原理图.pdf
SERVICE MANUALPORTABLE MINIDISC RECORDERNo.20911Jan. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.XM-R700SLXM-R700SLArea Suffix US SingaporeContentsSafety PrecautionsImportant for laser productsAttention whenMD pick up is exchangedDisassembly methodAdjustment methodMaintenance of laser pickupReplacement of laser pickupDescription of major ICs1-21-31-41-51-151-171-171-1837XM-R700SL1-21. 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. 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 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 characteristics. 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 Parts 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 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 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, 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 isolation 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 cord 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.)Alternate 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.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to eachexposed 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 0.75 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. 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(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.XM-R700SL1-3Important 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 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 are 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 laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.ADVARSEL : Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.ADVARSEL : Usynlig laserstråling ved åpning,når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.REPRODUCTION AND POSITION OF LABELSWARNING LABELDANGER : Invisibie laser radiation when open and interlock or defeated.AVOID DIRECT EXPOSURE TO BEAM (e)VARNING : Osynlig laserstrålning är denna del är öppnad och spårren ärurkopplad. Betrakta ej strålen. (s)VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen. (d)ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (f)!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.XM-R700SL1-4The laser diode in the traverse unit (optical pick up) is easy to be destroyed by clothes and the human body to the electrified static electricity.Please note the explosion by static electricity when repairing.In the equipment which uses an optical pick up (laser diode), an optical pick up is destroyed by the static electricity of the work environment. Please do the earth processing and work.2. About the earth processing for the electrostatic destruction prevention1) Earth of work standPlease pull the conductive material (conductive sheet) or the iron plate to the depository place of the traverse unit (optical pick up), and take the earth to ground.2) Human body earthPlease use the anti-static wrist strap to exhaust the electrified static electricity to the human body.3. Handling the optical pick up1) Please return according to a correct procedure based on short processing after exchangingparts. 2) Do not use a tester to check the condition of the laser diode in the optical pick up .The tester 's internalpower source can easily destroy the laser diode. 4. Attention when unit is disassembledPlease refer to “Disassembling method“ for how to detach .Conductive material (conductive sheet) or the iron plateanti-static wrist strapAttention when MD pick up is exchanged1. About the static electricity protection measuresSolder short1) Please be sure to solder before a flexible wire is removed from connector on a main printed circuit board as shown. if you removes without soldering.the MD picking up assembly might destroy2) When installing , solder in the part of short round should be removed after a flexible wire is connected with connector.XM-R700SL1-5Turn over the body and remove the six screws A attaching the bottom cover.Release the joint a outside and remove the bottom cover.1.2.Turn the MD door assembly up and open the door by sliding the door lever.Remove the one screw B and the two screws C attaching the MD door assembly.4.5.Disassembly methodRemoving the MD door assembly and the bottom cover (See Fig. 1 to 6)Disconnect the flexible wires from connector CN522 and CN571 on the main board.3.Peel off the adhesive tapes attaching the flexible wires. Whenreconnecting the flexible wires to the connectors, fix them with adhesive tapes (SeeFig.2).ATTENTION: When reattaching the bottom cover, fit the hole knobs b to the hold switches on the main board correctly (See Fig.1 and 2).ATTENTION: Fig.1Fig.2Fig.3Fig.4AAAAJoint aHold switchesMain boardCN522CN571CAdhesive tapeMD door assemblyBHole knobs bBottom coverdoor leverXM-R700SL1-6Prior to performing the following procedures, remove the bottom cover.Turn the body and disconnect the flexible wire from connector CN522, CN571, CN-401 and CN701 onthe main board respectively.1.Unhook the joint tab c on the left side, then the right side of the MD door.Remove the MD door assembly from the body while pulling out the flexible wires another end of which has already disconnected as shown in Fig.7.6.7.Removing the main board (See Fig.7 to 10)When pulling out the flexible wires, get it through the opening of themain board and the cabinet.ATTENTION: Before disconnecting the flexible wire extending from the pickup, makesure to solder the short circuit round to prevent damage to the pickup. ATTENTION: Peel off the adhesive tapes attaching the flexible wires. Whenreconnecting the flexible wires to the connectors, fix them with adhesive tapes (SeeFig.2).ATTENTION: Fig.5Fig.6Fig.7LeftRightMD door assemblyTab c Holder assemblyMD door assemblyTab cHolder assemblyCN701 CN401CN571CN522ECN300DMain boardBShort circuit roundBattery leadXM-R700SL1-7Prior to performing the following procedures, remove the MD door assembly, thebottom cover and the main board.Remove the two screws G and detach the MD mechanism assembly from the cabinetassembly.1.Remove the two screws D and the one screw E attaching the main board.Move the battery lead on the side of the body in the direction of the arrow and removethe screw F attaching the main board and the cabinet assembly.Remove the main body in the direction of the arrow while releasing the part d, thenpart e of the cabinet assembly from the flame assembly.2.3.4.Removing the MD mechanism assembly (See Fig.11)When reassembling, connect the flexible wire extending from the pickupto the connector on the main board and unsolder the short circuit round.ATTENTION: Fig.10Fig.9Fig.8Fig.11Battery leadFMain boardPart ePart dCabinet assemblyCabinet assemblyGGMD mechanism assemblyMain boardCN300Short circuit roundSolderXM-R700SL1-8Prior to performing the following procedures, remove the MD door assembly and the bottom cover.Disconnect the flexible wire from connector CN- on the main board (See Fig.7).Remove the screw H attaching the jog assembly on the right side of the cabinet assembly.Slide and release the three joints f attaching the jog assembly, and pull out the jog assembly fromthe part g on the cabinet assembly.1.2.3.Removing the jog assembly (See Fig.7 and 11)Prior to performing the following procedures, remove the MD door assembly and the bottom cover.Remove the two screws I and the one screw J attaching the door plate on the inside of the MDdoor assembly. Peel off the adhesive tape attaching the flexible wire.Pull out the door plate assembly in the direction of the arrow from the part h on the MD doorassembly.Remove the LCD assembly and the 5 key sheet from the door plate assembly (They are attachedwith the adhesive tapes).1.2.3.Removing the LCD assembly and the 5 key sheet (See Fig.12 to 15)HPart gJog assemblyJoints fJoints fFig.12Fig.13Fig.15Fig.14Part hDoor plate assemblyIIJMD door assemblyAdhesive tape5 key sheetLCD assemblyDoor plate assemblyIJDoor plate assemblyPart hIXM-R700SL1-9Removing the Magnetic head board (See Fig.1 and 2)Disconnect the magnetic head flexible harness from the connector of the magnetic head board on the holder assembly.Remove the screw A attaching the magnetic head board and pull out the magnetic head board from the slit (a) in the direction of the arrow.1.2.Removing the Magnetic head assembly(See Fig.2 to 5)1.2.3.4.5.Disconnect the magnetic head flexible harness from the connector of the magnetic head board on the holder assembly.Push the convex part b on the right side of the head protector in the direction of the arrow. Lift the right edge of the head protector (See Fig.4).Pull the left tab of the head protector from the slit (See Fig.5).Remove the two B screws attaching the magnetic head assembly on the underside of the chassis assembly.Pull out the magnetic head assembly in the direction of the arrow while paying attention to the magnetic head.Fig. 3Fig. 1Fig. 2Holder assemblySlit aAMagnetic head boardMagnetic head flexible harnessMagnetic head boardMagnetic headflexible harnessHead protector CPart cMagnetic headPullMagnetic head assemblyMagnetic head flexible harnessMagnetic head boardChassis assemblyHolder assemblyBMagnetic head assemblyUnderside of the chassis assemblyPickup assemblydXM-R700SL1-101.2.3.Attach the magnetic head assembly by cramping the MD mechanism assembly. Then, fix the magnetic head assembly to the pickup assembly on the underside of the chassis assembly by tightening the two B screws.Attach the left edge of the head protector and the right edge.Connect the magnetic head flexible harness to the connector on the magnetic head board.Removing the Holder assembly (See Fig.3 and 6)1.2.3.Prior to performing the following procedure, remove the magnetic head assembly.Remove the screw C of the chassis assembly part c and lift the edge of the holder assembly in the direction of the arrow d (See Fig.3).Move the part e of the holder assembly in the direction of the arrow to release the U-shaped notch from the shaft.Pull the part f of the holder assembly in the direction of the arrow to release it from the shaft.CAUTION: When reassembling the magnetic head assembly, reverse the order of the removing procedure.Fig. 4Fig. 5Fig. 6PushConvex part (b
