JVC-RCBX30-cs-sm维修电路原理图.pdf

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1、RC-BX30 No.21171 Dec. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. SERVICE MANUAL Contents Safety precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Trouble shooting 1-2 1-3 1-4 1-5 1-14 1-17 RC-BX30 Area suffix UJ - U.S.Military Flow of

2、functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs Wiring connection 1-18 1-19 1-19 1-20 1-22 CD PORTABLE SYSTEM RadioFans.CN 收音机爱 好者资料库 RC-BX30 1-2 1. This design of this product contains special hardware and many circuits and compon

3、ents 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 qualified personnel only. 2. Al

4、terations 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 injury or property damage

5、 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 components rated for high

6、er 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 Manual. The use of a subs

7、titute 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, barriers and the like to be

8、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 to normal, after re-assem

9、bling. 5. Leakage currnet 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 sure the product is safe t

10、o 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 any exposed metal part ha

11、ving 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 following manner. Connect a 1,5

12、00 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 having a return path to

13、 the chassis, and meausre 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.). 1. This equipment has been designed and manufactured to meet internationa

14、l 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 approved parts. 5. If mains voltage

15、 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 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attent

16、ion to such burrs in the case of 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 ar

17、e critical for safety. (This regulation does not correspond to J and C version.) RadioFans.CN 收音机爱 好者资料库 RC-BX30 1-3 Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap Short land Fiexible wire CD pickup unit 5. Attention when traverse unit is decomposed *Please re

18、fer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is removed from the CD servo board. (If the flexible wire is disconnected without applying solder, the CD pickup unit may be destroyed by static electricity.) In the assembly, be sur

19、e to remove solder from the short land after connecting the fiexible 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

20、repairs. Preventing static electricity 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 e

21、arth processing for the destruction 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

22、 strap to release any static electricity 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 t

23、ext.) 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. 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

24、. Remove solder of the short land on the flexible 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. Han

25、dle the flexible wire carefully as it may 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. RC-BX30 1-4 Important for laser products 1.CLASS 1 LASER PRODU

26、CT 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 the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc pl

27、ayer uses invisible 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 f

28、unction. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. VARNING : Osynlig laserstrlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO : Avattaessa ja suojalukitus ohitettaessa

29、 olet alttiina nkymttmlle lasersteilylle.l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undgudsttelse for strling. ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTION AND POSIT

30、ION OF LABELS 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. RC-BX30 1-5 Fig.1 Fig.2 Fig.3Fig.4 Removing the front cabinet assembly and rear cabinet assembly (See Figs. 2 to 4.) Disassembly method Removin

31、g the handle (See Fig. 1.) 1. 2. 3. 4. 5. Remove the eight screws A retaining the front cabinet and rear cabinet assemblies from the rear of the main body. (See Fig.2.) Open the cassette door. (See Fig.3.) Slide the lower part of the front cabinet assembly slightly in the direction of the arrow 1. (

32、See Fig.3.) While removing the front cabinet assembly from the cassette knobs and remove it in the upward direction 2. (See Fig.3.) Disconnect the speaker wire from the connector CN401 on the main board. (See Fig.4.) Open the CD door. Lift the handle slightly. While pressing the claws a of the rear

33、cabinet assembly in the direction of the arrow 1, slide the handle in the direction of the arrow 2. 1. 2. 3. CD door Rear cabinet assembly Handle Claw a Claw a 11 2 AA AA Rear cabinet assembly Cassette knobs Rear cabinet assembly Front cabinet assembly Rear cabinet assembly Front cabinet assembly Ma

34、in board CN401 2 1 RC-BX30 1-6 Fig.5 Fig.6 Fig.7 Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. Removing the right and left speaker assemblies (See Fig. 5.) 1. 2. 3. From the inside of the front cabinet assembly, remove the six screws

35、B retaining the right and left speaker assemblies. Remove the solders from the soldered sections b of the right and left speaker assemblies, remove the speaker wires. Take out the right and left speaker assemblies. Removing the cassette door gear assembly (See Fig. 6.) 1. 2. From the inside of the f

36、ront cabinet assembly, remove the two screws C retaining the cassette door gear assembly. Take out the cassette door gear assembly. NoteWhen attaching the screws C, apply a locking agent to the screws C. NoteWhen attaching the screws B, apply a locking agent to the screws B. Removing the cassette do

37、or (See Fig. 7.) 1. 2. While pressing the section c of the cassette door in the direction of the arrow, remove the boss d of the cassette door from the section e of the front cabinet assembly. Disengage the boss f of the cassette door from the section g of the front cabinet assembly. Prior to perfor

38、ming the following procedures, remove the cassette door gear assembly. NoteBe sure to hang the spring to the section h before attaching the cassette door to the front cabinet assembly. B B B Front cabinet assembly Cassette door gear assembly Cassette door Section e Section c Boss d Boss f Section g

39、Section h Spring Front cabinet assembly Right speaker assembly Left speaker assembly Soldered section b Soldered section b C C B Speaker wires RC-BX30 1-7 Fig.10 Fig.11 Fig.8 Fig.9 Removing the tuner board (See Figs. 8 to 10.) 1. 2. 3. 4. 5. From the rear side of the rear cabinet assembly, remove th

40、e screw D retaining the FM antenna. (See Fig.8.) Pull out the band and fine tune knobs from the tuner board. (See Fig.9.) Disconnect the wire from the connector CN101 on the tuner board. (See Fig.9.) Remove the screw E and two screws F retaining the tuner board. (See Fig.9.) Take out the tuner board

41、, then remove the screw G retaining the antenna connector plate. (See Fig.10.) Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. NoteWhen attaching the screws G, apply a locking agent to the screws G. Removing the main board (See Figs. 9

42、and 11.) 1. 2. 3. 4. 5. Disconnect the wire from the connector CN101 on the tuner board. (See Fig.9.) Pull out the volume, DBB and function knobs from the main board. (See Fig.11.) Disconnect the wires from the connectors CN302, CN303 and CN501 on the main board. (See Fig.11.) Remove the solders fro

43、m the soldered section i connecting the wires to the main board. (See Fig.11.) Remove the three screws H retaining the main board. (See Fig.11.) D G H H FF Rear cabinet assembly Rear cabinet assembly Rear cabinet assembly Rear cabinet assembly Main board Volume knobDBB knob CN302 CN303 CN501 Functio

44、n knob Soldered section i FM antenna Tuner board Tuner board Antenna connector plate Fine tune knob Band knob CN101 FM antenna wire FM antenna wire RC-BX30 1-8 Fig.12 Fig.13 Fig.14Fig.15 Removing the cassette deck/CD mechanism assembly (See Figs.12 and 13.) 1. 2. 3. From the rear side of the rear ca

45、binet assembly, remove the two screws J retaining the cassette deck/CD mechanism assembly. (See Fig.12.) Disconnect the wires from the connectors CN302, CN303 and CN501 on the main board. (See Fig.13.) Remove the two screws K retaining the cassette deck/CD mechanism assembly. (See Fig.13.) NoteWhen

46、attaching the screws K, apply a locking agent to the screws K. Removing the display board (See Figs.14 and 15.) 1. 2. 3. 4. 5. From the bottom side of the CD mechanism assembly, remove the tie bands bundling the wires from the CD mechanism assembly. (See Fig.14.) Disconnect the wires from the connec

47、tors BC01, BC02 and BC03 on the CD servo board. (See Fig.14.) Remove the solders from the soldered section j connecting the wires to the micro switch board. (See Fig.14.) Remove the two screws L retaining the display board. (See Fig.15.) Press the claws k in the direction of the arrow, remove the di

48、splay board. (See Fig.15.) J Cassette deck/CD mechanism assembly Rear cabinet assembly Rear cabinet assembly BC01 BC02 BC03Tie bands CD mechanism assembly Cassette desk mechanism assembly Tie band Display board Claws k CD servo board Soldered section j Micro switch board CN302 CN303 CN501 Cassette d

49、eck/CD mechanism assembly K L RC-BX30 1-9 Fig.16 Fig.17 Removing the cassette board (See Fig. 16.) 1. 2. 3. 4. From the back side of the cassette deck mechanism assembly, remove the tie band bundling the wires. Remove the solders from the soldered section m connecting the wires of the capstan motor and leaf switch. Remove the four screws M retaining the cassette board. From the reverse side of the cassette board, remove the solders from the soldered