JVC-UXM3R-cs-sm 电路图 维修手册.pdf

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1、UX-M3R No.21059 Jan. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. SERVICE MANUAL Contents Safety precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Flow of functional operation until TOC read 1-2 1-3 1-4 1-5 1-14 1-17 1-18 1-18 1-19 1-20

2、1-29 Maintenance of laser pickup Replacement of laser pickup Trouble shooting Description of major ICs Wiring connections UX-M3R Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe SP-UXM3CA-UXM3RSP-UXM3 DISPLAY MODE PHONES PROGRAM REC STOP/CLEARPLAY/PAUSE PRE EQ /HB

3、S VOLUME REPEAT SEARCH/TUNING RANDOM CDTUNERTAPE BAND M I C R O C O M P O N E N T S Y S T E M U X - M 3 R FULL LOGIC DECK CD SYNCHRO RECORDING TIMER ON/OFF SET REMAIN /RDS MODE EJECT INTRO/RDS SEARCH PRESET OPEN /CLOSE STANDBY /ON CD/RANDOMTAPE DISPLAY MODE PROGRAM REC SLEEPPRE UP TIMER BEAT CUT STA

4、NDBY/ON + VOLUME TUNER /BAND REPEAT /PRE DOWN INTRO /RDS SEARCH REMAIN /RDS MODE RM-SUXM3R REMOTE CONTROL MUTING PRE EQ /HBS MICRO COMPONENT SYSTEM RadioFans.CN 收音机爱 好者资料库 UX-M3R 1-2 1. This design of this product contains special hardware and many circuits and components specially for safety purpos

5、es. 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 circu

6、itry 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 el

7、ectrical 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. Replac

8、ement 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 no

9、t 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

10、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

11、(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 elec

12、trical 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 chassi

13、s, 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 following manner. Connect a 1,500 10W resistor paralleled by a

14、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 having a return path to the chassis, and meausre the AC

15、 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

16、 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 set

17、ting 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 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of

18、 preforming repair of this system. 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 by the mark nearby are critical for safety. (This reg

19、ulation does not correspond to J and C version.) RadioFans.CN 收音机爱 好者资料库 UX-M3R 1-3 Short land CD pickup unit Connector Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap 5. Attention when traverse unit is decomposed *Please refer to Disassembly method in the text

20、 for the CD pickup unit. Apply solder to the short land before the card wire is disconnected from the connector on the CD pickup unit. (If the card wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the

21、short land after connecting the card wire. 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. Preventing static elect

22、ricity 1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. 2. About the earth processing for the destruct

23、ion prevention by static electricity 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. 2-1 Ground the workbench 2-2 Ground yourself Use an anti-static wrist strap to release any static ele

24、ctricity built up in your body. 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.) Do not use a tester to che

25、ck the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 3. Handling the optical pickup 1. 2. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. Remove solder of the short lan

26、d on the card wire 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. Handle the card wire carefully as it ma

27、y break when subjected to strong force. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 4. Handling the traverse unit (optical pickup) 1. 2. 3. 4. RadioFans.CN 收音机爱 好者资料库 UX-M3R 1-4 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Inv

28、isible 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 the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisib

29、le laserradiation and is equipped with safety switches whichprevent emission of radiation when 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.CAUTIO

30、N : Use of controls, adjustments or performance of procedures other than those specified herein 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 nky

31、mttmlle lasersteilylle.l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTION AND POSITION OF LABELS WAR

32、NING LABEL CLASS 1 LASER PRODUCT !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. UX-M3R 1-5 Fuse(F903) 1A 250V Fuse(F901) 1A 250V Heat sink Soldered part a A Power board Fuse(F902) 2A 250V Fig.1 Fig.2 Main board Power amplifier

33、 IC (IC401) Replacing the fuses (See Fig. 1.) Remove the left side panel according to its disassembly method (see Figs. 5 and 6). Fuses are located inside the left side panel. Disassembly method Replacement of the fuses and power amplifier IC Caution Be sure to replace the required fuses with design

34、ated ones. Replacing the power amplifier IC on the main board (See Fig. 2.) 1. 2. Remove the main board according to its disassembly method (see Figs. 17 and 18). Remove the two screws A that attach the power amplifier IC onto the heat sink. In order to replace the power amplifier IC, remove the sol

35、der from soldered part a on the back side of the main board. UX-M3R 1-6 Fig.3 Fig.4 B B C(Long) C(Long) Right side panel Fig.5 B B C(Long) C (Long) Right side panel 1 Claw b Fig.6 Left side panel Left side panel 3 Claw c 2 4 Removing the right side panel (See Figs. 3 and 4.) 1. 2. From the right sid

36、e of the main body, remove the three screws B and three screws C retaining the right side panel. Slide the right side panel toward the rear (in the direction of arrow 1) until the claw b at the back of the panel is hooked by the chassis and then lift the panel upward (in the direction of arrow 2) to

37、 remove it. Removing the left side panel (See Figs. 5 and 6.) 1. 2. From the left side of the main body, remove the three screws B and three screws C retaining the left side panel. Slide the left side panel toward the rear (in the direction of arrow 3) until the claw c at the back of the panel is ho

38、oked by the chassis, and then lift the panel upward (in the direction of arrow 4) to remove it. UX-M3R 1-7 D D H Fig.8 Fig.11Fig.10 Fig.9 Fig.7 Lift the rear part to remove. Top cover (To be loosened) Rear panel 1 2 1 Ear phone board Connector on the cassette switch board Power board Tie band CN902

39、CN402 CN608 CD mechanism assembly Front panel assembly Hook d Hook d F F F G G E CD mechanism assembly CN607 Chassis CN201 Removing the top cover (See Figs. 7 and 8.) 1. 2. From the back side of the main body, loosen the two screws D retaining the top cover. Lift the rear part of the top cover to re

40、move it. Removing the front panel assembly (See Figs. 9 to 11.) 1. 2. 3. 4. 5. 6. 7. 8. 9. Remove the tie band bundling the wires. Disconnect the wire from the connector CN902 on the power board. Disconnect the wire from the connector on the cassette switch board. Remove the screw E retaining the br

41、acket on the ear phone board. Disconnect the wires from the two connectors CN201 and CN402 on the main board. Disconnect the wires from the two connectors CN607 and CN608 on the CD & MCU board. Remove the four screws F and the two screws G retaining the bracket of the CD mechanism assembly from the

42、left and right. Remove the screw H retaining the front panel assembly from the bottom side of the main body. While opening the hooks d to the left and right of the lower part of the front panel assembly (in the direction of arrows 1), slide the front panel assembly toward the front (in the direction

43、 of arrow 2). Remove the left and right side panels. Remove the left and right side panels. Remove the top cover. Note After assembly, apply a locking agent to the screws F and G. UX-M3R 1-8 K Fig.13 Fig.12 CD & MCU board CD mechanism assembly CD & MCU board CD & MCU board J CN701 CN603 Tie band K F

44、ig.14 Main board CN601 CN602 Stud Removing the CD mechanism assembly (See Figs. 12 to 14.) 1. 2. 3. 4. 5. Remove the left and right side panels. Remove the top cover. Remove the front panel assembly. Disconnect the wires from the four connectors CN601, CN602, CN603 and CN701 on the CD & MCU board. F

45、rom the left side of the main body, remove the tie band bundling the wires. Loosen the screw J retaining the main board. From the left and right sides of the main body, remove the four screws K retaining the bracket. Slide the CD mechanism assembly toward the front and remove it from the studs of th

46、e main board. UX-M3R 1-9 Fig.17 Fig.16 Fig.15 Rear panel Speaker terminal M L Stud Stud Stud Chassis CN901 Power board Power transformer Main board Fig.18 N ChassisHeat sink Soldered part e Main board Radio pliers, etc. Power board Chassis Power transformer FM antenna wire Removing the power board (

47、See Figs. 15 and 16.) 1. 2. 3. Remove the left and right side panels. Disconnect the wire from the connector CN901 on the power board. Remove the two screws L retaining the chassis . Remove the power board by pinching the two studs retaining the board using radio pliers, etc. Removing the main board

48、 (See Figs. 17 and 18.) 1. 2. 3. 4. Remove the left and right side panels. Remove the top cover. Remove the front panel assembly. Remove the CD mechanism assembly. Remove the two screws M retaining the speaker terminal of the main board. From the top side of the main body, remove the screw N retaining the heat sink of the main board. Remove the solder from the soldered part e that attaches the FM antenna wire to the main board. Slide the main board toward the front to remove it from the chassis. Note After assembly, apply a locking agent to the screw N. UX-M3R 1-10 Fig.20 Fig.21 Fig.22 Fig.19