JVC-RCBZ6-cs-sch维修电路原理图.pdf
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1、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
2、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-cit
3、y,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
4、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 manufactur
5、er. 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 a
6、dditions 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 no
7、t 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 co
8、mponents 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 cre
9、ate 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 requ
10、ired, 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 par
11、ts 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. U
12、sing 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 li
13、ne 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 resis
14、tor 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
15、 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. Th
16、erefore, 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.
17、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
18、 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, fab
19、ric, 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 d
20、iode) 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) o
21、n 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. Afte
22、r 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
23、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
24、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 materia
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