JVC-RCBZ6-cs-sch维修电路原理图.pdf

SERVICE MANUAL CD PORTABLE SYSTEM No.20819 July. 2000 Printed in Japan 200007(S) RC-BZ5LB/BZ5RD RC-BZ6BU (No.20819) RC-BZ5LB/BZ5RD RC-BZ6BU Safety precautions Importance administering point on the safety Preventing static electricity Important for laser products Disassembly method Adjustment method Description of major ICs RC-BZ5LB/BZ5RD REMOTE CONTROL RM-SRCBZ5 REMOTE CONTROL RM-SRCBZ6 RC-BZ6BU RC-BZ5LB/BZ5RD RC-BZ6BU Areas suffix J - U.S.A. C - Canada VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINSS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. 1-2 1-3 1-4 1-5 1-6 1-15 1-18 Contents Comparison table Item RC-BZ5LB/BZ5RDRC-BZ6BU Jog dial circuitNot usedUsed Back light (LCD)Not usedUsed Bass boost circuitNot usedUsed Power amplifier14W18W Electrical volumeNot usedUsed RadioFans.CN 收音机爱 好者资料库 1-2 RC-BZ5LB/BZ5RD RC-BZ6BU Safety 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 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 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 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 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 Manual. 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, 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 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 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 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 leakage current from each exposed metal parts of the cabinet , particularly 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 following 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 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.). 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 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 1-3 RC-BZ5LB/BZ5RD RC-BZ6BU Caution: For continued protection against risk of fire, replace only with same type 3A/125V for F902 and F903. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F902 et F903 comme le meme type que 3A/125V. Ce sont des fusibles suretes qui functionnes rapide. Importance administering point on the safety For USA and Canada / pour Etats - Unis d Amerique et Canada F901 Not used J9 POWER TRANSFORMER CN307CN306 D902 Power supply board D903 D901 F902 F903 D904 R998 S901 1-4 RC-BZ5LB/BZ5RD RC-BZ6BU CD Pick up Land Preventing static electricity 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.About the earth processing for the destruction prevention 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. 2-1 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. Handling 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 check 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. Remove solder of the land on the flexible cable 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. Handle 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 traverse unit is decomposed 1.Short the land before the card wire is removed from connector on the Main board as shown in Figure. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.) 2.Please remove solder after connecting the card wire with when you install picking up in the substrate. *Please refer to Disassembly method in the text for pick-up and how to detach the substrate. 1-5 RC-BZ5LB/BZ5RD RC-BZ6BU 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 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 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.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS WARNING LABEL !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CLASS 1 LASER PRODUCT 1-6 RC-BZ5LB/BZ5RD RC-BZ6BU Detach the battery cover on the back of the body. Remove the eight screws A attaching the front cabinet assembly and the rear cabinet assembly. Press STOP / EJECT button on the upper side of the body to open the cassette door. Remove the front cabinet assembly toward the front and pull out the volume knob at the same time. Disconnect the speaker harness from connector CN309 on the main board in the rear cabinet assembly. 1. 2. 3. 4. assembly / rear cabinet assembly (See Fig.1 to 3) Disassembly method AA Battery cover Fig.1 Fig.2 Fig.3 STOP / EJECT button Front cabinet assembly Rear cabinet assembly Cassette door Volume knob Rear cabinet assembly Front cabinet assembly Main board CN309 Removing the front cabinet assembly / 1-7 RC-BZ5LB/BZ5RD RC-BZ6BU Prior to performing the following procedure, remove the front cabinet assembly. Remove the eight screws B in the front cabinet.1. Removing the speaker (L) and (R) (See Fig.4) Prior to performing the following procedure, remove the front cabinet assembly. Remove the door spring in the front cabinet assembly. Insert a screwdriver between the door arm and the front cabinet and slide the door arms inward, then detach the cassette door from the front cabinet. 1. 2. Removing the cassette door (See Fig.5 and 6) Reattach the door spring to the cassette door shaft with opening the cassette door. Fit another end of the door spring to the front cabinet rib. Fit the shorter end of the door spring to the cassette door. 1. 2. 3. Reattaching the door spring B B B B Speaker (L) Speaker (R) Fig.4 Fig.5 Fig.6 Door arms Screwdriver Shaft Door spring 1-8 RC-BZ5LB/BZ5RD RC-BZ6BU Prior to performing the following procedure, remove the front cabinet assembly and the rear cabinet assembly. For the harness connecting the amplifier board with the power board, disconnect it from connector CN306 on the power board in the right rear cabinet assembly. For the harness connecting the battery terminal wire with the power board, disconnect it from CN307 on the power board. Remove the two screws C on the bottom of the cassette mechanism unit. Release the harnesses from the slot a, b and c and the notch of the main board in the rear cabinet. Remove the CD / cassette and amplifier assembly from the rear cabinet. Now the CD / cassette and amplifier assembly is ready to conduct burn-in. 1. 2. 3. 4. Removing the CD / cassette and amplifier assembly from the rear cabinet (See Fig.7 and 8) CD / cassette and amplifier assembly Slot a Slot c Power board CN307 CN306 Fig.7 Fig.8 Fig.9 CD / cassette and amplifier assembly Slot b D Key switch / display board CN704 CD door eject button Release the hornese C 1-9 RC-BZ5LB/BZ5RD RC-BZ6BU Prior to performing the following procedure, remove the CD / cassette and amplifier assembly. Disconnect the harness from connector CN704 on the key switch / display board (The harness is extending from the door switch board). Press EJECT button to open the CD door. Remove the two screws D on the front of the CD cover and door unit. Raise the front part of the CD cover and door unit and detach upward. Then push the whole unit backward until it comes off. 1. 2. 3. 4. Removing the CD cover and door unit (See Fig.9 and 10) Prior to performing the following procedure, remove the CD cover and door unit. Turn over the CD cover and door unit and gently spread apart the locking tab. Then remove the CD door switch board in the direction of the arrow while releasing it from joint d. 1. Removing the CD door switch board (See Fig.11) Prior to performing the following procedure, remove the front cabinet assembly and the rear cabinet assembly. Disconnect the card wires from connector CN701, CN702 and CN703, then the harness from CN704 on the key switch / display board. Remove the four screws E attaching the key switch / display board. The key switch / display board can be removed even if the mechanism cover is attached. 1. 2. Removing the key switch / display board (See Fig.12) At this point, the CD mechanism unit will become removable. So handle the rear cabinet with care. ATTENTION: CD cover and door unit Fig.10 Fig.11 Fig.12 Tab Joint d CD door switch board Key switch / display boardKey switch / display board CN702(RC-BZ5 only) CN704 CN703 CN701 EE Cassette mechanism assembly 1-10 RC-BZ5LB/BZ5RD RC-BZ6BU Prior to performing the following procedure, remove the CD / cassette and amplifier assembly, the CD cover and door unit and disconnect the harnesses connected to the key switch / display board. The cassette mechanism cover is still attached. Push inward the locking tabs e on both sides of the cassette mechanism cover and remove the mechanism cover in the direction of the arrow. Disconnect the harnesses from connector CN301 and CN308 on the main board. Remove the upper two screws F and the cassette mechanism assembly toward the front. 1. 2. 3. Removing the cassette mechanism assembly (See Fig.13 to 15) Prior to performing the following procedure, remove the CD / cassette and amplifier assembly, the CD cover and door unit. Disconnect the harness from connector P011 on the motor board in the lower part of the CD mechanism assembly. Then disconnect the pickup card wire from CN601 on the main board. Remove the CD mechanism assembly upward. 1. 2. Removing the CD mechanism assembly (See Fig.16) Fig.13 Fig.14 Fig.15Fig.16 Cassette mechanism assembly Cassette mechanism cover Cassette mechanism assembly Cassette mechanism cover Cassette mechanism assembly Main board CN308 CN301 F F Motor board P011 CD mechanism assembly Main board CN601 Locking tab e Locking tab e 1-11 RC-BZ5LB/BZ5RD RC-BZ6BU When reassembling, get the harness extending from FW301 and FW302 on the main board through the two slots g of the chassis. Get the card wire extending from CN304 on the main board through the hook h and the slot i. ATTENTION: Prior to performing the following procedure, remove the CD / cassette and amplifier assembly, the CD cover and door unit and the CD mechanism assembly. Disconnect the harnesses from connector CN301 and CN308 on the main board (The harnesses are extending from th