Free Audio Service Manuals - Free download Jvc RX 5032 VSL Service Manual

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1-2 (No.22038) SECTION 1 Important Safety Precautions 1.1 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 man- ufacturer. Replacement parts must be identical to those used in the original circuits. Services should be per- formed 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 characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manu- al. Electrical components having such feat u r es a r e i d e n- tified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute re- placement which does not have the same safety character- istics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or oth- er 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 reassembling. (5) Leakage shock hazard testing) After reassembling 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, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent 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 ohm 10W resistor paralleled by a 0.15 µF AC-type capacitor between anexposed 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.). 1.2 Warning (1) This equipment has been designed and manufactured to meet international 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 selector is provided, check setting for local voltage. 1.3 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 pre- forming repair of this system. 1.4 Critical parts for safety 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. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the JC version)

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(No.22038)1-3 SECTION 2 Disassembly method 2.1 Removing the top cover (See Fig.1) (1) From the right and left sides of the main body, remove the four screws A attaching the top cover. (2) From the back side of the main body, remove the three screws B attaching the top cover. (3) Remove the top cover in the direction of the arrow 2 while extending the lower sections of the top cover in the direc- tion of the arrow 1. Fig.1 2.2 Removing the front panel assembly (See Figs.2 and 3) - Prior to performing the following procedure, remove the top cover. (1) Disconnect the card wire from the connector CN402 on the audio board. (See Fig.2) (2) Disconnect the card wire from the connector CN201 on the power supply board. (See Fig.2) (3) Remove the tie band and wire protection board fixing the card wire. (See Fig.2) (4) Remove the tie band fixing the parallel wires, disconnect the parallel wire from the connector CN403 on the audio board. (See Fig.2) (5) Remove the three screws C attaching the front panel as- sembly. (See Fig.2) (6) From the bottom side of the main body, remove the four screws D attaching the front panel assembly. (See Fig.3) (7) Remove the front panel assembly in the direction of the ar- row. (See Fig.3) Fig.2 Fig.3 B A A 2 11 Top cover C C C Front panel assembly Card wire CN201 Power suppl y board Tie band Wire protection board Card wire CN402 Audio board CN403 Tie band DD Front panel assembly

Jvc RX 5032 VSL Service Manual

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