JVC-UXZ7MDR-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No.22042 2003/02 UX-Z7MDR MICRO COMPONENT MD SYSTEM 22042200302 UX-Z7MDR TABLE OF CONTENTS 1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2、-2 2Disassembly Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . 1-37 4Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44 Area Suffix E - Continental Europe RadioFans.CN 收音机爱 好者资料库 UX-Z7MDR 1-2 (No.22042) SECTION 1 Important Safety Precautions 1.1 S

4、afety Precautions (1) 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 man- ufacturer. Replacement parts must be identic

5、al to those used in the original circuits. Services should be per- formed 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 manufacture

6、rs 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 characteris- tics are often not evident from visual inspectio

7、n nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manu- al. Electrical components having such feat

8、ures are iden- tified by shading on the schematics and by () on the Parts List in the Service Manual. The use of a substitute re- placement which does not have the same safety character- istics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or

9、oth- er 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 origina

10、l lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassembling. (5) Leakage shock hazard testing) After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs,

11、 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 l

12、eakage current from each exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use

13、 an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 ohm 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

14、resistor connection to each exposed metal part, particularly any exposed metal part 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 c

15、orresponds to 0.5 mA AC (r.m.s.). 1.2 Warning (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 relevan

16、t 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. 1.3 Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such

17、burrs in the case of pre- forming repair of this system. 1.4 Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified b

18、y the mark nearby 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 JC version) RadioFans.CN 收音机爱 好者资料库 UX-Z7MDR (No.22042)1-3 1.5 Preventing static electricity Electrostatic discharge (ESD), which occurs

19、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. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the op

20、tical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed. (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 u

21、nit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pick

22、up are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.6 Handling the traverse unit (opt

23、ical pickup) (1) Do not subject the traverse 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 specific details, refer to the replace- ment procedure in the text.

24、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) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the l

25、aser power. Do not turn it. 1.7 Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnected w

26、ithout applying solder, the CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. PickupSolder part b Main board Flexible wire Shorting round CN601 on mechanism P.C. board RadioFans.CN 收音机爱 好者资料库 UX-Z7MDR 1

27、-4 (No.22042) 1.8 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 to beam. (3) CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace t

28、he complete Laser Unit if it malfunctions. (4) CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safet

29、y 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. CAUTION Please use enough caution not to see the beam directl

30、y or touch it in case of anadjustment or operation check. VARNING Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymt- tmlle lasersteilylle. l katso steeseen. ADVARSEL Usynlig laserstrling ved bning, n

31、r sikkerhedsafbrydere er ude af funktion. Undg udsasttelse for strling. ADVARSEL Usynlig laserstrling ved pning, nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTION AND POSITION OF LABELS WARNING LABEL DANGER : Invisibie laser radiation when open and interlock or defeated. AV

32、OID DIRECT EXPOSURE TO BEAM (e) VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. (d) ADVARSEL :Usynlig laserstrling ved bning , nr sikkerhedsafb

33、rydere er ude af funktion. Undg udsttelse for strling. (f) CLASS 1 LASER PRODUCT UX-Z7MDR (No.22042)1-5 SECTION 2 Disassembly Method 2.1 Main body 2.1.1Removing the metal cover (See Fig.1 to 3.) (1) Remove the six screws A on the rear part of the main body that attach the metal cover. (2) Remove the

34、 two screws B on each side of the main body that attach the metal cover. (3) Lift the rear part of the metal cover upward while releasing the lower sides of the metal cover in the right and left direc- tion. The metal cover will be removed. Fig.1 Fig.2 Fig.3 A A A Matal cover Matal cover B Matal cov

35、er B UX-Z7MDR 1-6 (No.22042) 2.1.2Removing the CD mechanism assembly (See Fig.4 to 7.) Prior to this procedure, remove the metal cover. (1) Remove the card wire from the connector CN302 on amp board on the left side of the main body. (2) Remove the three screws C on top of the body that attach the C

36、D mechanism assembly. (3) Lift the CD mechanism assembly upward and move it backward to remove. (4) Remove the card wire from CN606 on CD servo board, on the bottom of the CD mechanism assembly. Fig.4 Fig.5 Fig.6 Fig.7 CD mechanism assy Amp board CN302 CC C Amp board CN302 CD mechanism assy CD mecha

37、nism assy CD mechanism assyCD servo board CN606 UX-Z7MDR (No.22042)1-7 2.1.3Removing the front panel (See Fig.8 to11.) Prior to this procedure, remove the metal cover and the CD mechanism assembly. (1) Remove the card wire from the connector CN705 on micon board, in the center of the right side of t

38、he main body. (2) Remove the plastic rivet in the right side of the main body that attaches tuner board. (3) Remove the card wire from the connector CN301 on amp board in the center of the left side of the main body. Remove the card wire from the connector CN704 on micon board. Remove the wire from

39、each connector CN703 and CN710 respectively. (4) Remove the card wire from the connector CN452 on FL connection board on top of the main body. (5) Remove the two screws D on the right and left sides of the main body that attach the front panel assembly. (6) Remove the two screws E on the bottom of t

40、he main body that attach the front panel assembly. (7) Remove the joint a on the bottom of the main body and the joint b on the right and left sides respectively by using a screwdriver. Remove the front panel assembly in the front direction. Fig.8 Fig.9 Fig.10 Fig.11 Plastic rivet Tuner board Front

41、panel assy D Micon board CN705 joint b D Micon board CN704 Front panel assy joint b CN703 CN710 Amp board CN301 FL connect board CN452 Front panel assy Micon board CN704 CN710 CN703 EE joint a Front panel assy UX-Z7MDR 1-8 (No.22042) 2.1.4Removing the tuner board (See Fig.12.) Prior to this procedur

42、e, remove the metal cover. (1) Remove the card wire on the right side of the main body from the connector CN1 on the tuner board. (2) Remove the plastic rivet on the right side of the main body that attaches the tuner board. (3) Remove the two screws F on the rear side of the main body that attach t

43、he tuner board. Fig.12 2.1.5Removing the rear cover (See Fig.13.) Prior to this procedure, remove the metal cover and the CD mechanism assembly. (1) Remove the two screws G on the rear side of the main body that attach the rear cover. Fig.13 2.1.6Removing the fan (See Fig.14 to 16.) Prior to this pr

44、ocedure, remove the metal cover, the CD mech- anism assembly, and the rear cover. (1) Remove the wire from the connector CN603 on the MD connect board in the right side of the main body. (2) Remove the four screws H on the rear side of the main body that attach the fan. (3) Move the fan bracket that

45、 attaches the fan from inside the rear panel upward to remove the two fixing points c. Fan will be detached at the same time. Notice When attaching the fan, attach the two e to the two d re- spectively before pressing the fan with fan bracket. Fig.14 Fig.15 Fig.16 CN1 Tuner doard Plastic rivet F G G

46、 Rear panel Rear cover FanRear panel H H MD connect board CN603 Fan Rear panel joint c joint c Fan blacket Fan hole e hole e hook d hook d UX-Z7MDR (No.22042)1-9 2.1.7Removing the rear panel (See Fig.17 to 20.) Prior to this procedure, remove the metal cover, the CD mech- anism assembly, and the rea

47、r cover. (1) Remove the wire from the connector CN603 on MD con- nect board on the right side of the main body. (2) Remove the eight screws F on the rear side of the main body that attach the rear panel. (3) Remove the two joint f on the right and left bottom of the rear panel. Notice The fan assemb

48、ly will be kept attached to the rear panel. Fig.17 Fig.18 Fig.19 Fig.20 Rear panel MD connect doard CN603 Rear panel F F F F F Rear panel joint f joint f Rear panel UX-Z7MDR 1-10 (No.22042) 2.1.8Removing the MD mechanism assembly (See Fig.21 and 22.) Prior to this procedure, remove the metal cover,

49、the CD mech- anism assembly, and the rear cover. (1) Remove the card wire from the connector CN601 on the MD connect board in the rear part of the MD mechanism assembly. (2) Remove the four screws H on the front side and the rear side that attach the MD mechanism assembly. Remove the MD mechanism assembly upward. Fig.21 Fig.22 2.1.9Removing the headphone board (See Fig.23 and 24.) Prior to this procedure, remove the metal cover, the CD mech- anism assembly, and the rear cover. (1) Re