JVC-MXJ50-cs-sm 维修电路原理图.pdf

Power Transformer SectionParts are safety assurance parts.When replacing those parts makesure to use the specified one.RadioFans.CN 收音机爱 好者资料库Power Amplifier & Regulator SectionMAIN SIGNALParts are safety assurance parts.When replacing those parts makesure to use the specified one.RadioFans.CN 收音机爱 好者资料库Function & Main Amplifier SectionCD / MAIN SIGNALTUNER SIGNALTAPE P.B. SIGNALTUNER Section (For Ver.J,C,A,U,DOM)FM/TUNER MAIN SIGNALAM SIGNALFL Display & System controller SectionRECLRECRPBLPBRMICKCMNDMSTATKCLKDATARDS-DATARDS-CLKMRDYFVOLDAVOLCKSPI-ASPI-BSPI-CSPICSBCKRESETSPIDTIINHPROSADAPROSACKPOUTTUCESMUTERVOLDATAPE P.B. SIGNALMIC & Headphone SectionCD Servo & CD Mechanism control sectionCD SIGNALHead amplifier & Mechanism control sectionTAPE P.B. SIGNALMX-J502-16Removal of Main PartsRemoving the Metal Cover (See Fig.1 to 3)1.2.3.Remove the six A screws attaching the metal cover on the back of the body.Remove the two B screws attaching the metal cover on both sides of the body.Lift the metal cover on the back of the body and remove it from the body.CAUTION: DO NOT break the front panel tab fitted to the metal cover.Fig.1Fig.2Fig.3Metal coverAAABMetal coverBMetal coverMX-J502-17Removing the CD Changer Mechanism Assembly(See Fig.4 to 6) 1.2.3.4.Prior to performing the following procedure, remove the metal cover.Disconnect the connector CN410 of the card wire connecting the CD changer mechanism board to the main board.Remove the two C screws on the upper side of the CD changer assembly and the two D screws on the back of the rear panel.Remove the plastic rivet attaching the main board.Lift and remove the CD changer mechanism assembly on the back of the body while pulling the rear panel and the front panel assembly. * To prevent damage to the CD fitting, be sure to pull the rear panel and the front panel assembly enough to remove the CD changer mechanism.Fig.4Fig.5Fig.6Main boardMain boardCD changer assemblyCCN410Main boardRear panelDRear panelPlastic rivetFront panel assemblyMain boardMX-J502-18Removing the Front Panel Assembly(See Fig.7 to 9) 1.2.3.4.Prior to performing the following procedure, remove the metal cover and CD changer mechanism assembly.Disconnect the card wires from connector CN411, CN412 and CN413 on the main board.Disconnect the flat wire from connector CN703 on the amplifier board.Remove the four E screws attaching the front panel assembly on the bottom of the body.Release the two joints(a) and (b) on the lower left and right sides of the body using a screwdriver, and remove the front panel assembly toward the front.Fig.7Fig.8Fig.9bFig.9aMain boardCN413CN411CN412Front panel assembly Amplifier boardCN703EJoint(a)Joint(b)MX-J502-19Removing the Rolling panel Panel assembly(See Fig.10 and 11)1.2.3.4.5.Disconnect the card wires from connector CN817,CN812, CN951 and CN816 on the upper system control & FL board and on the rolling panel assembly on the reverse side of the front panel assembly Disconnect the card wire from connector CN859 on the relay board on the back of the rolling panel assembly.Disconnect the flat wire from connector CN858 on the relay board. (Only Ver.U type)Remove the six F screws attaching the stay bracket.Remove the four G screws attaching the rolling panel assembly.Removing the Cassette Mechanism Assembly(See Fig.12) 1.Prior to performing the following procedure, remove the rolling panel assembly.Remove the four H screws and four H1 screws attaching the cassette mechanism assembly. *Disconnect the flat wire extending from the phones board through the slit of the rolling panel assembly.Fig.10Fig.11Fig.12CN951CN812CN817CN816System control & FL boardFGGGPhones boardRelay boardHHCassette mechanism assemblyH1H1CN859CN858Stay bracketMX-J502-20Removing the System Control & FL Board(See Fig.13 and 14)1.2.3.4.Disconnect the card wires and flat wires from connector CN812, CN817, CN816, CN951, CN813, CN810 and CN811 on the system control & FL board respectively.Disconnect the flat wire from connector D851 on the relay board.Remove the six F screws attaching the stay bracket.Remove the two I screws attaching the system control & FL board.Removing the Relay Board (See Fig.15)1.2.3.Remove the one screw J attaching the relay board.Release the five c tabs fitted to the relay board.Disconnect the card wires, the 2P harness and the flatwires from connector CN856, CN857, CN859, CN863,CN858 (Only Ver.U type) and D851 on the relay boardrespectively.Fig.13Fig.14Fig.15CN813CN951CN812CN817CN816System control & FL boardCN810CN811IIFD851Relay boardStay bracketRelay boardTab cTab cCN863Tab cD851CN859CN857CN858Tab cCN856Tab cJMX-J502-21Removing Each Board of the Front Panel Assembly (See Fig.16 and 17)1.2.3.4.5.6.7.8.Disconnect the flat wire from connector CN816 on the system control & FL board on top of the rolling panel assembly.Remove the three K screws attaching the power switch board.Remove the two L screws attaching the phones board together with bracket.Remove the four M screws attaching the CD eject board and unsolder the flat wire.Pull out the volume knob and nut toward the front.Remove the two N screws attaching the volume board and unsolder the flat wire.Remove the three O screws attaching the function board 1 and unsolder the flat wire.Remove the four P screws attaching the function board 2.Remove the rolling panel assembly.Remove the flat wire extending from the phonesboard through the slit of the rolling panel assembly.The flat wire connected with CN858 is removed for Uversion.The screw H1 is removed and the earth wire isremoved for U version.*Fig.16Fig.17UnsolderPhones board Power switch boardKMMCD eject board LH1LKCN816CN858Function board 1OOUnsolderVolume board NP PP PFunction board 2UnsolderMX-J502-22Prior to performing the following procedure, remove the metal cover and the CD changer mechanism assembly.The following procedure can be performed even if the front panel assembly is attached.Removing the Rear Cover (See Fig.18)1. Remove the two Q screws attaching the rear cover on the back of the body.Prior to performing the following procedure, remove the rear cover.Remove the four R screws attaching the heat sink and the rear panel.Remove the ten S screws attaching the rear panel.Remove the two T screws attaching the voltage selector and the rear panel. (Only Ver.U type)Release the two joints(d) and (e) on the lower part of the rear panel using a screwdriver, and remove the rear panel toward the rear side.Removing the Rear Panel (See Fig.18 to 21) 1.2.3.4.Fig.18Fig.19Fig.21Fig.20Heat sink RRRear panelSRear panelQSSSRear coverTQJoint(d)Joint(e)SMX-J502-23Removing the Main Board (See Fig.22 and 23)1.2.3.Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.Disconnect the card wires from connector CN411, CN412 and CN413 on the main board and the flat wire from connector CN415.Remove the screw U attaching the main board on the right side of the body.Disconnect connector CN416 and CN417 under the main board, and remove the main board upward.Removing the Rated Voltage Board and Power Amplifier Board (See Fig.22, 24 and 25) 1.2.3.4.Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.The following procedure can be performed even if the front panel assembly is attached.Disconnect the flat wire from connector CN703 on the power amplifier board.Disconnect the flat wire from connector CN415 on the main board.Pull out the rated voltage board and the power amplifier board upward from connector CN102 and CN103 on the power board respectively.Remove the two V screws and two W screws attaching the heat sink together with the heat sink bracket.Fig.22Fig.23Fig.25Fig.24Main boardCN413CN411CN412CN703CN415Main boardMain boardMain boardUCN416CN417CN102CN103Rated voltage boardPower amplifier boardSpeaker boardCN105Power boardRated voltage boardPower amplifier boardWVHeat sinkHeat sink bracketMX-J502-24Removing the Power Transformer Board(See Fig.26) 1.2.3.Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.Disconnect the 5P harness and the flat wire from connector CN109 and CN111 on the power board.Remove the four X screws attaching the power transformer assembly.Push the cord stopper upward to remove it.Removing the Speaker Board (See Fig.24)1.Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the rear panel.The following procedure can be performed even if the front panel assembly is attached.Pull out the speaker board upward from connector CN105 on the power board.XCN111CN109XCord stopperPower transformer boardFig.24Fig.26CN102CN103Rated voltage boardPower amplifier boardSpeaker boardCN105Power boardMX-J502-25Removing the rolling Panel Assembly (See Fig.27)1.2.Remove the two Y screws attaching the rolling panel assembly.Remove the rolling panel assembly while pulling outward the left and right hooks attaching the rolling panel assembly.Removing the operation switch Board (See Fig.28 and 29)1.2.3.Remove the six Z screws attaching the cover and the bracket.Release the two f tabs fitted to the bracket, and pull out the left and right panel holders.Remove the two A screws attaching the operation switch board.Removing the Drive Motor (See Fig.30 and 31)1.2.3.Remove the two B screws and the two C screw attaching Pull out the gear shaft A upward.Remove the motor belt.Fig.27Fig.28Fig.29YRolling panel assemblyHookZCoverBracket Panel holderTab fTab fAoperation switch BoardPanel holderFig.30Joint bracketBCJoint bracketFig.31Gear shaft ADrive motorMotor beltMX-J30/MX-J330/MX-J35R2-17CD Changer Mechanism Type:VC3 Section Removing the CD Servo control board (See Fig.1) Removing the CD tray assembly (See Fig.24)1.2.3. 4.5.6.7.8.9.Remove the front panel assembly.Remove the CD changer mechanism assembly.Remove the CD Servo control board.From the T.bracket sectionBand clamper base sectionC, remove both of the edges fixing the rod(See Fig.2 and 3).Remove the screw 2 retaining the Disc stopper (See Fig.3).Remove the three screws 3 retaining the T.bracket (See Fig.3).Remove the screws 4 retaining the clamper assembly (See Fig.3).From the left side face of the chassis assembly, remove the one screw 5 retaining both of the return spring and lock lever(See Fig. 4).By removing the pawl at the sectionD fixing the return spring, dismount the return spring(See Fig.4). Remove the three lock levers(See Fig.4).10.Fig.1Fig.2Fig.3Fig.41.Remove the metal cover.2.Remove the CD changer mechanism assembly.3.From bottom side the CD changer mechanism assembly, remove the two screws 1 retaining the CD servo control board.4.Absorb the four soldered positions M of the right and left motors with a soldering absorber.5.Pull out the earth wire on the CD changer mechanism assembly.6.The two screws A is removed and C.B.holder is detached.7.Disconnect the connector CN854 on the CD servo control board.8.Disconnect the card wire CN601 and the connector CN801 on the CD servo control board.CN601CN801AABCRodT.BraketClamper base23343T.BraketDisc stopperLod stopper(C/J version only)Clamper assyCBDLock leverReturn spring5CD servo control boardCN651CN854MM11C.B.HolderEarthwireMX-J30/MX-J330/MX-J35R2-1811.12.Check whether the lifter unit stopper has been caught into the hole at the sectionEof CD tray assembly as shown in Fig.5.Make sure that the driver unit elevator is positioned as shown in Fig.6 from to the second or fifth hole on the left side face of the CD changer mechanism assembly.Fig.5Fig.7Fig.6Fig.8Fig.9Caution In case the driver unit elevator is not at above position, set the elevator to the position as shown in Fig.7 by manually turning the pulley gear as shown in Fig.8.13.14.15.Manually turn the motor pulley in the clockwise direction until the lifter unit stopper is lowered from the sectionEof CD tray assembly(See Fig.8).Pull out all of the three stages of CD tray assembly in the arrow direction Funtil these stages stop (See Fig.6).At the position where the CD tray assembly has stopped, pull out the CD tray assembly while pressing the two pawls G and Gon the back side of CD tray assembly(See Fig.9). In this case, it is easy to pull out the assembly when it is pulled out first from the stage CD tray assembly.CD trayassemblyEDrive unit of elevatorCD tray assemblyFRefer to Fig.7Pawl Chassis assemblyPulley gearMotor pulleyPawl , CD tray assemblyStopperG G GMX-J30/MX-J330/MX-J35R2-19 Removing the CD loading mechanism assembly(See Fig.10)1.2.While turning the cams R1 and R2 assembly in the arrow directionHalign the shaftIof the CD loading mechanism assembly to the position shown in Fig.10.Remove the four screws 6 retaining the CD loading mechanism assembly. Removing the CD traverse mechanism (See Fig.11 and 12 )1.2. For dismounting only the CD traverse mechanism without removing the CD loading mechanism assembly, align the shaftJof the CD loading mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow directionK.By raising the CD loading mechanism assembly in the arrow directionL, remove the assembly from the lifter unitFig.10Fig.12Fig.11Fig.13 Removing the CD pick unit (See Fig.13 )1.2.3.4. Move the cam gear in the arrow direction a . Then, the CD pickup unit will be moved in the arrow direction b .According to the above step, shift the CD pickup unit to the center position.While pressing the stopper retaining the shaft in the arrow direction c , pull out the shaft in the arrow direction d .After dismounting the shaft from the CD pickup unit, remove the CD pickup unit6Cams R1, R2 assemblyICD loading mechanism assembly6HArrow66Lifter unitCD traverse mechanismLArrowCam R1, R2 assemblyKArrowJCD Pickup unitCD loadingmechanismShaftCam gearShaftShaftStopperStopperbadcMX-J30/MX-J330/MX-J35R2-20 Removing the cam unit (See Fig.14 17 )1.2.3.4.5. Remove the CD loading mechanism assembly.While turning the cam gear L, align the pawlNposition of the drive unit to the notch position(Fig.16) on the cam gear L.Pull out the drive unit and cylinder gear(See Fig.17).While turning the cam gear L, align the pawlOposition of the select lever to the notch position(Fig.18) on the cam gear L.Remove the four screws 9 retaining the cam unit(cam gear L and cams R1/R2 assembly)(See Fig.18).Fig.15Fig.14Fig.16Cam gear LDrive unitNChassis assemblyTray select switch boardCN802CN801CN8048Cylinder gearDrive unitFig.179Select leverCams R1, R2 assembly99Cam unitCam gear LOMX-J30/MX-J330/MX-J35R2-21Fig.18Fig.20Fig.19Fig.21Note When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed, then the pulley gear as well as the gear, etc. constituting the gear unit can possibly be separated to pieces. In such a case, assemble these parts by referring to the assembly and configuration diagram in Fig. 22. Removing the actuator motor and belt (See Fi