JVC-MXJ150R-cs-sm维修电路原理图.pdf

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1、COMPACT COMPONENT SYSTEM No.20858 Oct. 2000 COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. MX-J150R MX-J150R Area Suffix E EN EV Continental Europe Northern Europe Eastern Europe COMPACT DIGITAL AUDIO OPEN / CLOSE STANDBY DISC CHANGE COMPACT DIGITAL AUDIO PLAYREC/PLAY CD SYNCHRO RECORDING EJECTEJECT P

2、ROGRAM/SET COUNTER RESET DISPLA YMODE PTY /EON CLOCK /TIMER REPEAT AUXFM/AM - TUNINGTUNING + CDTAPE TAPE A/B CD REC START A B DUBBING REC/PAUSE FULL-LOGIC CONTROL DEMO VOLUME CD1CD2CD3 + PLAY & EXCHANGER PHONES COMPU PLAY CONTROL PRESET + ACTIVE BASS EX. SOUND MODE SELECT + CD PROGRAM /SET REPEAT ON

3、/OFFSLEEP TIMER SOUND MODE ACTIVE BASS EX. TAPEA/BTUNING MODE FM MODE TAPE DISC SKIP VOL. VOL. FM/AMAUX FADE MUTING + RMSMXJ100E REMOTE CONTROL CD SP-MXJ150RSP-MXJ150RCA-MXJ150R Safety precautions Important for laser products Preventing static electricity Disassembly method Adjustment method 1-2 1-3

4、 1-4 1-5 1-19 Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1-23 1-24 1-24 1-25 Contents SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 MX-J150R 1-2 Safety Precautions 1. This design of this product contains special hardware and

5、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 qualifi

6、ed 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 i

7、njury 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 c

8、omponents 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 M

9、anual. 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, barr

10、iers 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 t

11、o normal, after re-assembling. 5. Leakage current 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 su

12、re 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

13、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 method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having 1,000 ohms per volt or more sensitivity in the followin

14、g 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 each exposed metal part, particularly any exposed metal part

15、having a return path to the chassis, and measure 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.). Warning 1. This equipment has been designed and ma

16、nufactured 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 appr

17、oved parts. 5. If mains voltage selector is provided, check setting for local voltage. Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE !CAUTION Burrs formed during molding may be left over on some parts

18、 of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. RadioFans.CN 收音机爱 好者资料库 MX-J150R 1-3 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure t

19、o beam. 3.CAUTION : There are no serviceable parts inside the Laser 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 w

20、hen the drawer is open and the safety interlocks have failed or are de feated. 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 he

21、rein may result in hazardous radiation exposure. VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning , nr sik

22、kerhedsafbrydere er ude af funktion. Undg udsttelse for strling. ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTION OF LABELS !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or ope

23、ration check. CLASSIFICATION LABEL, PLACED ON REAR ENCLOSUREWARNING LABEL, PLACED INSIDE THE UNIT CLASS 1 LASER PRODUCT DANGER: Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) ADVARSEL: Usynlig laser- strling ved bning, nr sikkerhedsafbrydere

24、er ude af funktion. Undg udst- telse for strling (d) VARNING: Osynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s) VARO: Avattaessa ja suo- jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f) MX-J150R 1-4 Preventing static ele

25、ctricity 1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 2. A

26、bout the earth processing for the destruction prevention by static electricity In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment. Be careful to use proper grounding in the area where repairs are being performed.

27、2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. 2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. 3. Ha

28、ndling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2. Do not use a tester to che

29、ck the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 4. Handling the traverse unit (optical pickup) 1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. 2. Cut off the sh

30、orted part of the flexible cable using nippers, etc. 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 not to take too long a time when attaching it to the connector. 3. Ha

31、ndle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap Attention when CD mechanism as

32、sembly is decomposed 1. Remove the CD changer unit. 2. Remove the CD changer mechanism. 3. Solder is put up before the card wire is removed from the pickup unit connector on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up assembly might destroy.) 4

33、. Please remove solder after connecting the card wire with the pickup unit connector when you install picking up in the substrate. *Please refer to Disassembly method in the text for pick-up and how to detach the CD mechanism assembly. Soldering Fig.1 Fig.2 Card wire Card wire Pickup unit connector

34、Pickup unit connector CD changer unit CD changer mechanism MX-J150R 1-5 Remove the three screws A on the back of the body and the two screws B on both sides of the body. Remove the top cover upward from behind. Remove the two screws C attaching the side covers on the back of the body and the six scr

35、ews D on both sides. Slide the right and left covers backward and unhook the two hooks a in the lower part of the side covers as shown in Fig.2-2. 1. 2. 3. 4. Removing the top cover & the side covers (See Fig.1 to 3) Disassembly method Fig.1 Fig.2Fig.2-2 Fig.3 Top coverA AA CC Side cover (L) Side co

36、ver (R) Side cover (R) B D DD Top cover Hooks a Top cover Hooks a B D DD Side cover (L) Hook Hook MX-J150R 1-6 Prior to performing the following procedure, remove the top cover and the side covers. Press the POWER button. Press the OPEN/CLOSE button to eject the CD tray. Move the CD tray fitting upw

37、ard and release the joint b. Press the OPEN/CLOSE button to insert the CD tray. 1. 2. 3. Removing the CD tray fitting (See Fig.4 to 6) Be sure to remove the CD tray fitting before removing the CD changer unit. ATTENTION: Turn the black loading pulley gear marked c from the back of the CD changer uni

38、t as shown in Fig.7 and draw the CD tray toward the front. Move the CD tray fitting upward and release the joint b. Push and insert the CD tray manually. 1. 2. 3. Removing the CD tray fitting (See Fig.5 to 7) - How to eject the CD tray without turning on power - Fig.4 Fig.5 Fig.6 Fig.7 POWER button

39、OPEN/CLOSE button CD tray Joint b Joint b CD tray fitting CD tray Marked c Loading pulley gear MX-J150R 1-7 Prior to performing the following procedure, remove the top cover, the side covers and the CD tray fitting. Disconnect the card wire from connector SCW1 of the CD servo board on the back of th

40、e CD changer unit. Disconnect the harness from connector FW2 on the inner side of the main board in the body. Remove the two screws E attaching the CD changer unit on the back of the body. Draw the CD changer unit upward from behind while pulling the rear panel outward. 1. 2. 3. 4. Removing the CD c

41、hanger unit (See Fig.8 to 10) Fig.8 Fig.9 Fig.10 SCW1 CD servo board CD changer unit Main board FW2 Rear panel E Rear panel Front panel assembly CD changer unit MX-J150R 1-8 Prior to performing the following procedure, remove the top cover, the side covers, the CD tray fitting and the CD changer uni

42、t. There is no need to remove the rear panel. Disconnect the harness from head wire connector DW1 and DW2 on the inner side of the main board in the body. Disconnect the harness from connector HCW1 of the headphone board on the right side of the body. Remove the screw F and the two screws G attachin

43、g the front panel assembly on both sides of the body. Remove the screw V attaching the earth terminal extending from the front compartment. Remove the screw H attaching the front panel assembly on the bottom of the body. Release the two joints d on both sides and two joints e on the bottom of the bo

44、dy using a screwdriver. At the same time, disconnect the front compartment from connector CCW1 and CCW2 of the main board. 1. 2. 3. 4. 5. Removing the front panel assembly (See Fig.11 to 13) Fig.11 Fig.12 Fig.13 Main board DW2 DW1 CCW1 CCW2 Front panel assembly Joint d earth wire G V Front panel ass

45、embly F G Main board Headphone board HCW1 H Joint eJoint e Joint d MX-J150R 1-9 Prior to performing the following procedure, remove the top cover, the side covers, the CD tray fitting and the CD changer unit. There is no need to remove the front panel assembly. Remove the seven screws I attaching th

46、e main board and the tuner board to the rear panel on the back of the body. Remove the three screws J attaching the heat sink to the rear panel on the back of the body. Remove the three screws K attaching the rear panel on the back of the body. 1. 2. 3. Removing the rear panel (See Fig.14) Prior to

47、performing the following procedure, remove the rear panel. Disconnect the harness from connector HCW1 of the headphone board on the right side of the body. Release the harness from the clamp in the body. Disconnect the harness from head wire connector DW1 and DW2 extending to the main board in the b

48、ody. Disconnect the harness from connector RCW1 of the power transformer. Remove the screw L attaching the earth terminal to the base chassis. Remove the screw F attaching the front panel assembly. Disconnect connector CCW1 and CCW2 connected to the main board. 1. 2. 3. 4. 5. 6. Removing the main bo

49、ard (See Fig.15 and 16) Fig.14 Fig.15 Fig.16 I Rear panel I I K K J Front panel assembly Main board Headphone board HCW1 Main board Heat sink Tuner board DW2 DW1 CCW2 CCW1 Power transformer RCW1 L Clamp F MX-J150R 1-10 Prior to performing the following procedure, remove the main board. Remove the three screws M attaching the heat sink cover p