JVC-RX5042S-avr-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB171 2004/3 AUDIO/VIDEO CONTROL RECEIVER MB17120043 RX-5042S TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 Area suffix J - U.S.A. C - Canada RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB171) SPECIFICATION Designs and specifications are subject to change without notice. Amplifier Output Power At Stereo operationFront channels100 W per channel, min. RMS, driven into 8 , 40 Hz to 20 kHz with no more than 0.8% total harmonic distortion. At Surround operationFront channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. Center channel100 W, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. Surround channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. Audio Audio Input Sensitivity/ Impedance (1 kHz) CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 k Audio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 OpticalDIGITAL 2 (CD):-21 dBm to -15 dBm (660 nm 30 nm) * Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency-32 kHz, 44.1 kHz, 48 kHz) Recording Output LevelTAPE/CDR, VCR:220 mV Signal-to-Noise Ratio(66 IHF/78 IHF)CD, TAPE/CDR, VCR, TV SOUND, DVD:87 dB/74 dB Frequency Response (8 )CD, TAPE/CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB) Bass Boost+3 dB 1 dB at 100 Hz (Only for RX-6040B/RX-6042S) Equalization (5 bands) 63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz (8 dB in 2 dB steps) Video Video Input Sensitivity/ImpedanceComposite video:DVD, VCR1 V(p-p)/75 Video Output LevelComposite video:VCR, MONITOR OUT1 V(p-p)/75 SynchronizationNegative Signal-to-Noise Ratio45 dB FM tuner (IHF) Tuning Range87.5 MHz to 108.0 MHz Usable SensitivityMonaural:12.8 dBf (1.2 V/75 ) 50 dB Quieting SensitivityMonaural:16.0 dBf (1.7 V/75 ) Stereo:37.5 dBf (20.5 V/75 ) Stereo Separation at OUT (REC)35 dB at 1 kHz AM tuner Tuning Range530 kHz to 1 710 kHz General Power RequirementsAC 120V , 60 Hz Power Consumption200 W/260 VA (at operation):2 W (in standby mode) Dimensions (W H D)435 mm 146.5 mm 369.5 mm (17 3/16 in. 5 13/16 in. 14 5/8 in.) Mass7.5 kg (16.6 lbs) RadioFans.CN 收音机爱 好者资料库 (No.MB171)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. 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 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 Ser- vice 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 charac- teristics 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 reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna 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 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed 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.). 1.2Warning (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. 1.3Caution 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. 1.4Critical 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. (This regulation dose not Except the J and C version) 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 1-4 (No.MB171) 1.5Importance administering point on the safety Caution: For continued protection against risk of fire, replace only with same type 6.3A/125V for F201, 2A/125V for F202 and F203, 5 A/125 V for F206 and F207. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F201 comme le meme type que 6,3 A/125 V, 2 A/125 V pour F202 et F203, et 5 A/125 V pour F206 et F207. Ce sont des fusibles suretes qui functionnes rapide. Secondary parts (Power transformer board 1) Primary part (Power / Fuse board) 5A-125V F206 5A-125V F207 2A-125V F202 2A-125V F203 6.3A-125V F201 (No.MB171)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB171) SECTION 3 DISASSEMBLY 3.1 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 direction of the arrow 1. Fig.1 3.2 Removing the front panel assembly (See Figs.2 and 3) Prior to performing the following procedures, remove the top cover. (1) Disconnect the card wire from the connector CN402 on the front 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 remove the wire protection board fixing the card wire. (See Fig.2.) (4) Remove the three screws C attaching the front panel assembly. (See Fig.2.) (5) From the bottom side of the main body, remove the four screws D attaching the front panel assembly. (See Fig.3.) (6) Remove the front panel assembly in the direction of the arrow. (See Fig.3.) Fig.2 Fig.3 B A A 2 1 1 Top cover C Front panel assembly Card wire CN201 Power supply board Tie band Wire protection board Card wire CN402 Front board CC DD Front panel assembly (No.MB171)1-7 3.3 Removing the rear panel (See Fig.4) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the strain relief from the rear panel in the direction of the arrow. (2) Remove the twenty-one screws E attaching the rear panel. Fig.4 3.4 Removing the tuner (See Fig.5) Prior to performing the following procedures, remove the top cover. (1) Disconnect the card wire from the connector CN411 on the front board. (2) Take out the tuner. Fig.5 3.5 Removing the DSP board, audio input board, DVD board and video board (See Fig.6) Prior to performing the following procedures, remove the top cover and rear panel. (1) From the top side of the main body, disconnect the DSP board from the connector CN481 and CN482 on the front board. (2) Disconnect the audio input board from the connector CN421 on the front board. (3) Disconnect the DVD board from the connector CN431 on the front board. (4) Disconnect the video board from the connector CN441 on the front board. Fig.6 E E Strain relief Rear panel Card wire CN411 Tuner CN481 Front board DVD board Video board CN421 Audio input board DSP board CN431 CN441 CN482 1-8 (No.MB171) 3.6 Removing the front board (See Fig.7) Prior to performing the following procedures, remove the top cover, rear panel, DSP board, audio input board, DVD board, video board and tuner. (1) From the top side of the main body, disconnect the card wire from the connector CN402 on the front board. (2) Disconnect the relay board from the connectors (CN291, CN491) on the power supply board and front board. (3) Disconnect the wires from the connectors CN471, CN472 and CN473 on the front board. (4) Remove the two screws F attaching the front board. (5) Loosen the screw G attaching the front board. (6) Take out the front board from the main body. Fig.7 3.7 Removing the speaker terminal board (See Fig.8) Prior to performing the following procedure, remove the top cover and rear panel. From the top side of the main body, remove the solders from the soldered sections a on the speaker terminal board. Fig.8 CN491 CN402 Front board Relay board Power supply board F F G CN473 CN471 CN472 CN291 Card wire Parallel wires Speaker terminal board Soldered sections a (No.MB171)1-9 3.8 Removing the main board (See Fig.9) Prior to performing the following procedures, remove the top cover. (1) From the top side of the main body, remove the tie bands fixing the wires. (2) Remove the tie band and remove the wire protection board fixing the card wire. (3) Remove the solders from the soldered sections b on the speaker terminal board attaching the parallel wires. (4) Disconnect the relay board from the connectors (CN291, CN491) on the power supply board and front board. (5) Disconnect the parallel wire from the connector CN241 on the power supply board. (6) Disconnect the wire from the connector CN251 on the power transformer board 1. (7) Disconnect the wires from the connectors CN471, CN472 and CN473 on the front board. (8) Remove the screw G, two screws H and four screws J attaching the main board. (9) Take out the main board from the main body. Fig.9 3.9 Removing the heat sink (See Figs.10 and 11) Prior to performing the following procedures, remove the top cover and main board. (1) Remove the three screws K attaching the heat sink. (See Fig.10.) (2) From the reverse side of the main board, remove the two screws L attaching the heat sink. (See Fig.11.) 3.10 Removing the power ICs (See Figs.11) Prior to performing the following procedures, remove the top cover, main board and heat sink. (1) From the reverse side of the main board, remove the solders from the soldered sections c on the main board. (2) Take out the power ICs. Fig.10 Fig.11 Soldered sections b CN471 CN472 CN491 Front board CN473 Card wire K J Tie band Wire protection board J Tie bands Main board Relay board J CN241 Power supply board CN251 Tie band CN291 Power transformer board 1 G Parallel wires Speaker terminal board Heat sink Main board K Power IC Heat sink LL Main board Soldered section c 1-10 (No.MB171) 3.11 Removing the power transformer (See Fig.12) Prior to performing the following procedures, remove the top cover. (1) From the top side of the main body, remove the tie bands fixing the wires. (2) Remove the solders from the soldered section d on the power transformer board 1. (3) Remove the solders from the soldered sections e on the power transformer board 2. (4) Disconnect the wire from the connector CN251 on the power transformer board 1. (5) Remove the four screws M attaching the power transformer. (6) Take out the power transformer from the main body. 3.12 Removing the power/fuse board (See Fig.12) Prior to performing the following procedures, remove the top cover. (1) From the back and top sides of the main body, remove the screw N and screw P attaching the power/fuse board. (2) Remove the solders from the soldered sections f attaching the power cord. (3) From the reverse side of the power/fuse board, remove the solders from the soldered sections g attaching the wires. Fig.12 CN251 Soldered section d Soldered sections e Soldered sections f Soldered sections g Tie band Power transformer Power transformer board 2 Power cord M M P N M M Power transformer board 1 Power / Fuse bo