JVC-RXDV31SL-avr-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.22023 2003/6 HOME THEATER DVD-AUDIO/VIDEO RECEIVER 2202320036 RX-DV31SL TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 6DESCRIPTION OF MAJOR ICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 Area suffix J - U.S.A. C - Canada DVD/SUPER VCD/VCD/CD COMPAC T SUPER VIDEO RX-DV31 HOME THEATER DVD-AUDIO/VIDEO RECEIVER RadioFans.CN 收音机爱 好者资料库 1-2 (No.22023) SPECIFICATION AmplifierOutput PowerAt 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 operation Front 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. AudioAudio Input Sensitivity/ Impedance (1 kHz) TV, TAPE/CDR, DBS, VCR240 mV/47 k Audio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DBS)0.5 V(p-p)/75 OpticalDIGITAL 2 (TV)-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). Signal-to-Noise Ratio (66 IHF/78 IHF) TV, TAPE/CDR, DBS, VCR87 dB/67 dB Frequency Response (8 )TV, TAPE/CDR, DBS, VCR20 Hz to 20 kHz (1 dB) Tone ControlBass (100 Hz)10 dB 2 dB Treble (10 kHz)10 dB 2 dB VideoVideo Input Sensitivity/ Impedance (1 kHz) Composite video DBS IN, VCR IN1 V(p-p)/75 S-videoDBS IN, VCR IN(Y:luminance)1 V(p-p)/75 (C:chrominance)0.286 V(p-p)/75 Video Output Level/Impedance (1 kHz) Composite video VCR OUT, MONITOR OUT1 V(p-p)/75 S-videoVCR OUT, MONITOR OUT (Y:luminance)1 V(p-p)/75 (C:chrominance)0.286 V(p-p)/75 Component video DVD COMPONENT VIDEO OUT (Component-Y)1.0 V(p-p)/75 (Component-PB/PR) 0.7 V(p-p)/75 Color System NTSC Horizontal Resolution 500 lines Signal-to- Noise Ratio (S/N) 63 dB SynchronizeNegative FM tuner (IHF) Tuning Range87.5 MHz to 108.0 MHz AM tunerTuning Range530 kHz to 1 710 kHz GeneralPower Requirements AC 120 V , 60 Hz Power Consumption 200 W/255 VA (in operation) 2 W (in standby mode) Dimensions (W H D) 435 mm 100 mm 403.5 mm (17 3/16 in. 3 15/16 in. 15 15/16 in.) Mass8.4 kg (18.5 lbs) RadioFans.CN 收音机爱 好者资料库 (No.22023)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.22023) 1.5Importance administering poin on the safety F132 F131 F101 Caution: For continued protection against risk of fire, replace only with same type 5A/125V for F101, 2A/125V for F131 and F132. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F101 comme le meme type que 5A/125V, et 2A/125V pour F131 et F132. Ce sont des fusibles suretes qui functionnes rapide. Main board (Forward side) Power board (Forward side) (No.22023)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.22023) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Fig.1) (1) From the both 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 3.1.2Removing the front panel assembly (See Figs.2 to 4) Prior to performing the following procedures, remove the top cover. (1) From the top side of the main body, disconnect the card wire from the connector CN114 on the main board. (See Fig.2.) (2) Remove the screw C attaching the earth wire and sub trans. Board. (See Fig.2.) (3) From the bottom side of the main body, remove the five screws D attaching the front panel assembly. (See Fig.3.) (4) From the both side of the main body, release the two joints a using a flat-bladed screwdriver and remove the front pan- el assembly in the direction of the arrow. (See Fig.4.) Fig.2 Fig.3 Fig.4 B 1 1 2 Ax2 Ax2 Top cover C CN114 Main board Earth wire Sub trans board Front panel assembly D Front panel assembly Joint a Front panel assembly (No.22023)1-7 3.1.3Removing the rear panel (See Fig.5) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the strain re- lief from the rear panel in the direction of the arrow. (2) Remove the twenty three screws E attaching the each board to the rear panel. (3) Remove the four screws F attaching the rear panel. Fig.5 3.1.4Removing the DSP board (See Figs.6 and 7) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the four screws G attaching the DSP board to the rear panel. (See Fig.6.) (2) From the top side of the main body, disconnect the DSP board from the connector CN611 on the DSP connector board. (See Fig.7.) (3) From the left side of the main body, lift the DSP board in the direction of the arrow and disconnect the card wire from the connector CN602 on the DSP board. (See Fig.7.) (4) Take out the DSP board. 3.1.5Removing the video jack board (See Figs.6 and 7) Prior to performing the following procedures, remove the top cover and DSP board. (1) From the back side of the main body, remove the four screws H attaching the video jack board. (See Fig.6.) (2) Disconnect the card wire from the connector CN402 on the video jack board and take out the video jack board. (See Fig.7.) Fig.6 Fig.7 F Rear panel EEF F E Strain relief F H Rear panel G DSP board DSP connector board Card wire Card wire Video jack board CN611 CN402 CN602 1-8 (No.22023) 3.1.6Removing the tuner (See Figs.8 and 9) Prior to performing the following procedures, remove the top cover, DSP board and video jack board. (1) From the back side of the main body, remove the two screws J attaching the tuner. (See Fig.8.) (2) From the top side of the main body, disconnect the card wire from the connector CN1 on the tuner. (See Fig.9.) (3) Take out the tuner. Fig.8 Fig.9 3.1.7Removing the DAC board (See Fig.10) Prior to performing the following procedures, remove the top cover. (1) From the top side of the main body, disconnect the DAC board from the connectors CN911 and CN912 on the main board. Fig.10 J CN 1 Tuner Card wire CN911 CN912 DAC board Main board (No.22023)1-9 3.1.8Removing the amp. board (See Fig.11) Prior to performing the following procedures, remove the top cover and rear panel. (1) From the top side of the main body, disconnect the wire from the connector CN201 on the amp. board. (2) Remove the screw K attaching the earth wire to the heat sink barcket. (3) Remove the four screws L attaching the amp. board. (4) Disconnect the connector CN202 on the amp. board. (5) Lift the amp. board and disconnect the wire from the con- nector CN231 on the main board. (6) Disconnect the parallel wire from the connector CN241 on the main board and take out the amp. board. Fig.11 3.1.9Removing the heat sink (See Fig.12) Prior to performing the following procedures, remove the top cover, rear panel and amp. board. (1) Remove the screw M attaching the H.sensor board. (2) Remove the five screws N attaching the IC bracket, heat sink bracket and heat sink. Fig.12 3.1.10 Removing the power ICs (See Fig.13) Prior to performing the following procedures, remove the top cover, rear panel, amp. board and heat sink. (1) From the reverse side of the amp. board, remove the sol- ders from the soldered points b attaching the power ICs to the amp. board. Fig.13 L CN201 Earth wire K CN202 Main board Amp. board CN231 CN241 Heat sink bracket N H. sensor boardMHeat sink bracket Heat sink IC bracket Amp. board N N Amp. board Power ICs solbered points b 1-10 (No.22023) 3.1.11 Removing the amp. sub(a) board and amp. sub(b) board (See Fig.14) Prior to performing the following procedures, remove the top cover, rear panel and amp. board. (1) From the forward side of the amp. board, disconnect the amp. sub(a) board from the connector CN203 on the amp board. (2) Disconnect the amp. sub(b) board from the connector CN204 on the amp. board. Fig.14 3.1.12 Removing the DVD mechanism assembly (See Fig.15) Prior to performing the following procedures, remove the top cover and front panel assembly. (1) From the top side of the main body, remove the screw P and two screws Q attaching the DVD mechanism assem- bly. Reference: When attaching the screw P, attach the thrust spring together with it. When attaching the screw Q, attach the earth wires to- gether with them. (2) Disconnect the DVD mechanism assembly from the con- nectors CN512 and CN513 on the main board. (3) Take out the DVD mechanism assembly. Fig.15 3.1.13 Removing the main board (See Fig.16) Prior to performing the following procedures, remove the top cover, rear panel, DAC board, DSP board, video jack board, tuner, amp. board and DVD mechanism assembly. (1) From the top side of the main body, disconnect the fan mo- tor wire from the connector CN122 on the main board. (2) Disconnect the card wire from the connector CN125 on the main board. (3) Disconnect the wire from the connector CN121 on the main board. (4) Disconnect the parallel wire from the connector CN291 on the main board. (5) Remove the five screws R attaching the main board. Reference: Remove the barrier, DSP connector board and amp. connec- tor board as required. Fig.16 CN203 CN204 Amp. sub (b) boardAmp. sub (a) board Amp. board