JVC-RCBZ6-cs-sch 维修电路原理图.pdf
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1、SERVICE MANUALCD PORTABLE SYSTEMNo.20819July. 2000Printed in Japan200007(S)RC-BZ5LB/BZ5RDRC-BZ6BU(No.20819)RC-BZ5LB/BZ5RDRC-BZ6BUSafety precautionsImportance administering point on the safety Preventing static electricityImportant for laser productsDisassembly methodAdjustment methodDescription of m
2、ajor ICsRC-BZ5LB/BZ5RDREMOTE CONTROL RM-SRCBZ5REMOTE CONTROL RM-SRCBZ6RC-BZ6BURC-BZ5LB/BZ5RDRC-BZ6BUAreas suffix J - U.S.A.C - CanadaVICTOR COMPANY OF JAPAN, LIMITEDAUDIO & COMMUNICATION BUSINSS DIVISIONPERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,JapanCOPYRIGHT 2
3、000 VICTOR COMPANY OF JAPAN, LTD.1-21-31-4 1-51-61-151-18ContentsComparison tableItem RC-BZ5LB/BZ5RDRC-BZ6BUJog dial circuitNot usedUsedBack light (LCD)Not usedUsedBass boost circuitNot usedUsedPower amplifier14W18WElectrical volumeNot usedUsedRadioFans.CN 收音机爱 好者资料库1-2RC-BZ5LB/BZ5RDRC-BZ6BUSafety p
4、recautions1. 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
5、 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
6、 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 prote
7、ction 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 sh
8、ading 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
9、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
10、 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 ca
11、binet, 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 curr
12、ent 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 methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter
13、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
14、 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
15、(r.m.s.). Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!CAUTIONBurrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repa
16、ir of this system.RadioFans.CN 收音机爱 好者资料库1-3RC-BZ5LB/BZ5RDRC-BZ6BUCaution: For continued protection against risk offire, 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, remplacezle fusible de surete de
17、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 CanadaF901Not usedJ9POWER TRANSFORMERCN307CN306D902Power supply boardD903D901F902F903D904R998S9011-4RC-BZ
18、5LB/BZ5RDRC-BZ6BUCD Pick upLandPreventing static electricity1.Grounding to prevent damage by static electricityElectrostatic 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 c
19、are 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 a
20、re 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
21、in your body. 3. Handling the optical pickup1. 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 us
22、e 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.
23、 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
24、 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 itConductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapAttention when traverse unit is decomp
25、osed1.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 substrat
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