Jvc-MXJ-50-Service-Manual(1) 电路图 维修手册.pdf

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1、Power Transformer Section Parts are safety assurance parts. When replacing those parts make sure to use the specified one. RadioFans.CN 收音机爱 好者资料库 Power Amplifier & Regulator Section MAIN SIGNAL Parts are safety assurance parts. When replacing those parts make sure to use the specified one. RadioFan

2、s.CN 收音机爱 好者资料库 Function & Main Amplifier Section CD / MAIN SIGNAL TUNER SIGNAL TAPE P.B. SIGNAL RadioFans.CN 收音机爱 好者资料库 TUNER Section (For Ver.J,C,A,U,DOM) FM/TUNER MAIN SIGNAL AM SIGNAL FL Display & System controller Section RECL RECR PBL PBR MIC KCMND MSTAT KCLK DATA RDS-DATA RDS-CLK MRDY FVOLDA

3、VOLCK SPI-A SPI-B SPI-C SPICSB CK RESET SPIDTI INH PROSADA PROSACK POUT TUCE SMUTE RVOLDA TAPE P.B. SIGNAL MIC & Headphone Section CD Servo & CD Mechanism control section CD SIGNAL Head amplifier & Mechanism control section TAPE P.B. SIGNAL MX-J50 2-16 Removal of Main Parts Removing the Metal Cover

4、(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

5、 to the metal cover. Fig.1 Fig.2 Fig.3 Metal coverA AA B Metal cover B Metal cover MX-J50 2-17 Removing 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 C

6、D 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 pul

7、ling 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.4 Fig.5 Fig.6 Main boardMain board CD changer assembly C CN410 Main board Rear panel D Rear panel Plasti

8、c rivet Front panel assembly Main board MX-J50 2-18 Removing 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.

9、 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 towar

10、d the front. Fig.7 Fig.8 Fig.9bFig.9a Main board CN413 CN411 CN412 Front panel assembly Amplifier board CN703 E Joint(a) Joint(b) MX-J50 2-19 Removing 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 uppe

11、r 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

12、) 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 at

13、taching the cassette mechanism assembly. * Disconnect the flat wire extending from the phones board through the slit of the rolling panel assembly. Fig.10 Fig.11 Fig.12 CN951CN812CN817 CN816 System control & FL board F G G G Phones board Relay board H H Cassette mechanism assembly H1H1 CN859 CN858 S

14、tay bracket MX-J50 2-20 Removing 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

15、 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 w

16、ires, the 2P harness and the flat wires from connector CN856, CN857, CN859, CN863, CN858 (Only Ver.U type) and D851 on the relay board respectively. Fig.13 Fig.14 Fig.15 CN813 CN951 CN812 CN817 CN816 System control & FL board CN810 CN811 II F D851 Relay board Stay bracket Relay board Tab c Tab cCN86

17、3Tab c D851 CN859 CN857 CN858 Tab cCN856Tab c J MX-J50 2-21 Removing 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 attac

18、hing 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

19、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 phones board through the slit of the rolling panel assembly. The fla

20、t wire connected with CN858 is removed for U version. The screw H1 is removed and the earth wire is removed for U version. * * * Fig.16 Fig.17 Unsolder Phones board Power switch board KM M CD eject board L H1 L K CN816 CN858 Function board 1 O O UnsolderVolume board N P P P P Function board 2 Unsold

21、er MX-J50 2-22 Prior 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

22、 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 typ

23、e) 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.18 Fig.19 Fig.21Fig.20 Heat sink RR Rear panel S Rear panel Q S S S Rear cover T Q Joint(d) Joint(e

24、) S MX-J50 2-23 Removing 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 con

25、nector 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

26、 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 connect

27、or 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.22 Fig.23 Fig.25Fig.24 Main boar

28、d CN413 CN411 CN412 CN703 CN415 Main boardMain boardMain board U CN416 CN417 CN102 CN103 Rated voltage board Power amplifier board Speaker board CN105 Power board Rated voltage board Power amplifier board W V Heat sink Heat sink bracket MX-J50 2-24 Removing the Power Transformer Board (See Fig.26) 1

29、. 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 th

30、e 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 th

31、e speaker board upward from connector CN105 on the power board. X CN111 CN109 X Cord stopper Power transformer board Fig.24 Fig.26 CN102 CN103 Rated voltage board Power amplifier board Speaker board CN105 Power board MX-J50 2-25 Removing the rolling Panel Assembly (See Fig.27) 1. 2. Remove the two Y

32、 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 t

33、he 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 m

34、otor belt. Fig.27 Fig.28 Fig.29 Y Rolling panel assembly Hook Z Cover Bracket Panel holder Tab f Tab f A operation switch Board Panel holder Fig.30 Joint bracket BC Joint bracket Fig.31 Gear shaft A Drive motor Motor belt MX-J30/MX-J330/MX-J35R 2-17 CD Changer Mechanism Type:VC3 Section Removing the

35、 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 fixin

36、g 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

37、 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.1 Fig.2 Fig.3Fig.4 1.Remove the metal cover. 2.Remove the CD changer mechanism assembly. 3.From bott

38、om 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.

39、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. CN601 CN801 AA B C Rod T.Braket Clamper base 2 3 3 4 3 T.Braket Disc stopper Lod stopper (C/J version only) Clamper assy C B D

40、 Lock lever Return spring 5 CD servo control board CN651 CN854 M M 1 1 C.B.Holder Earth wire MX-J30/MX-J330/MX-J35R 2-18 11. 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 positi

41、oned as shown in Fig.6 from to the second or fifth hole on the left side face of the CD changer mechanism assembly. Fig.5 Fig.7Fig.6 Fig.8 Fig.9 Caution 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 a

42、s 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 p

43、osition 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 tray assembly E Drive u

44、nit of elevator CD tray assembly F Refer to Fig.7Pawl Chassis assembly Pulley gear Motor pulley Pawl , CD tray assembly Stopper G G G MX-J30/MX-J330/MX-J35R 2-19 Removing the CD loading mechanism assembly(See Fig.10) 1. 2. While turning the cams R1 and R2 assembly in the arrow directionHalign the sh

45、aftIof 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 assem

46、bly, 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 unit Fig.10 Fig.12 Fig.11 Fig.13 Removing

47、 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 directi

48、on c , pull out the shaft in the arrow direction d . After dismounting the shaft from the CD pickup unit, remove the CD pickup unit 6 Cams R1, R2 assembly I CD loading mechanism assembly 6 H Arrow 6 6 Lifter unit CD traverse mechanism LArrow Cam R1, R2 assembly K Arrow J CD Pickup unit CD loading mechanism Shaft Cam gear ShaftShaft Stopper Stopper b a d c MX-J30/MX-J330/MX-J35R 2-20 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 pawlN position of the drive unit to the notch position(F