JVC-RXD702B-avr-sch维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MB500 2006/1 AUDIO/VIDEO CONTROL RECEIVER MB50020061 RX-D701SB,RX-D701SE,RX-D701SEN RX-D702BB,RX-D702BE,RX-D702BEN Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBL

3、Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . 1-9 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB500) SPECIFICATION Designs and specifications are subject to change without notice. Amplifier Output Powe

5、rAt stereo operationFront channels130 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion (IEC268-3/DIN). At surround operationFront channels130 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion. Center chann

6、el130 W, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion. Surround channels130 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion. Surround back channels130 W per channel, min. RMS, driven into 6 at 1 kHz, with no more

7、 than 0.8% total harmonic distortion. AudioAudio Input Sensitivity/ Impedance DVR/DVD, VCR, DBS, TV300 mV/47 k Audio Input (DIGITAL IN) Coaxial: DIGITAL IN 1(DVR/DVD) 0.5 V(p-p)/75 Optical: DIGITAL IN 2(DBS), 3(VCR) -21 dBm to -15 dBm (660 nm 30 nm) USBUSB WIRELESS USB TERMINAL Audio Output LevelDVR

8、, VCR300mV Signal-to-Noise Ratio (66 IHF/78 IHF)80 dB/62 dB Frequency Response (6 )20 Hz to 20 kHz (1 dB) Bass Boost+4 dB 1 dB at 100 Hz Equalization (at DSP operation) Center frequency63 Hz, 250 Hz, 1 kHz, 4kHz, 16 kHz Control range8 dB VideoVideo Input Sensitivity/ Impedance Composite video: DVR/D

9、VD, VCR, DBS 1 V(p-p)/75 S-video: DVR/DVD, VCR, DBS Y (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 V(p-p)/75 Component: DVR/DVD, VCR (DBS) Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Video Output Level/ Impedance Composite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONI

10、TOR OUT Y (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 V(p-p)/75 Component: MONITOR OUT Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 SynchronizationNegative HDMIHDMI Input (Ver. 1.1)VCR (DBS), DVR/DVD HDMI Output (Ver. 1.0)MONITOR OUT FM tuner (IHF) Tuning Range87.50 MHz to 108.00 MHz Us

11、able SensitivityMonaural12.8 dBf (1.2 V/75 ) 50 dB Quieting Sensitivity Monaural16.0 dBf (1.7 V/75 ) Stereo37.5 dBf (20.5 V/75 ) Stereo Separation at REC OUT35 dB at 1 kHz AM tuner Tuning Range531 kHz to 1 710 kHz General Power RequirementsAC 240 V , 50 Hz Power Consumption180 W (at operation) 5.0 W

12、 (in standby mode) Dimensions (W H D)435 mm 91.5 mm 371 mm Mass7.8 kg USB WIRELESS SYSTEMThe USB wireless transmitter supplied with this receiver supports Direct Sequence Spreading Spectrum (DSSS) using 2.4 GHz frequency band. RadioFans.CN 收音机爱 好者资料库 (No.MB500)1-3 SECTION 1 PRECAUTIONS 1.1Safety Pre

13、cautions (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 tho

14、se 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 warran

15、ty 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

16、 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

17、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 hazard

18、s. (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

19、 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 ca

20、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 cur

21、rent 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 vol

22、tmeter 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 connectio

23、n 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

24、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.

25、 (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

26、 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

27、 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 sensiti

28、vity) 1500 10W 0.15 F AC TYPE 1-4 (No.MB500) 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in w

29、riting by the manufacturer. Replace- ment parts must be identical to those used in the original circuits. (2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resul

30、ting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safe

31、ty related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock, fire, o

32、r 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 origina

33、l lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 1.5.1Warning (1) Service should be performed by qualified personnel only. (2) This equipment has been designed and manufactured to meet international safety standards.

34、 (3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (4) Repairs must be made in accordance with the relevant safety standards. (5) It is essential that safety critical components are replaced by approved parts. (6) If mains voltage selector is pr

35、ovided, check setting for local voltage. Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. (No.MB500)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPEC

36、IFIC SERVICE INSTRUCTIONS. 1-6 (No.MB500) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Fig.1 and 2) (1) From the both sides of the main body, remove the four screws A attaching the top cover. (See fig. 1) (2) From the back side of the main body, remove the five screws

37、B and screw C attaching the top cover. (See Fig. 2) Reference: When removing the screw C, use a screwdriver to show as follows. TORX Driver: size T10 Parts number: DR-L70 (3) Remove the top cover in the direction of the arrow. (See Fig. 1) Fig.1 Fig.2 3.1.2Removing the USB wireless board (See Fig. 3

38、) Remove the top cover. (1) From the top side of the main body, disconnect the LAN module board from USB board. (2) Remove the two screws D attaching the USB board. (3) Disconnect the connector wire from connector CN662 of the DSP board. Fig.3 A Top cover B Top cover BB C D Rear panel Coaxial connec

39、tor CN662 DSP board USB wireless board (No.MB500)1-7 3.1.3Removing the fan motor (See Fig. 4) Remove the top cover. (1) Remove the tie band bundling the wires. (2) From the top side of the main body, disconnect the wire from the connector CN103 on the main amplifier board. (3) Remove the three screw

40、s E and take out the fan motor as- sembly. (4) Remove the two screws F attaching the fan motor to the fan bracket. Fig.4 3.1.4Removing the HDMI board (See Figs.5 and 6) Remove the top cover. (1) From the back side of the main body, remove the three screws G attaching the HDMI board to the rear panel

41、. (See Fig.5) (2) From the top side of the main body, remove the screw H at- taching the HDMI board. (See Fig.6) (3) Disconnect the card wires from the connectors (CN731, CN732, and CN762) on the HDMI board. (See Fig.6) (4) Disconnect the parallel wire from the connector CN711 on the HDMI board. (Se

42、e Fig.6) (5) Take out the HDMI board from the main body. (See Fig.6) 3.1.5Removing the DSP board (See Figs.5 and 6) Remove the top cover and fan motor. (1) From the back side of the main body, remove the five screws J attaching the DSP board to the rear panel. (See Fig.5) (2) From the top side of th

43、e main body, remove the screw K at- taching the DSP board. (See Fig.6) (3) Disconnect the connector CN681 on the DSP board from the DSP connect board. (See Fig.6) Note: When removing the DSP board, take care not to break the claw of the connector on it. (4) Take out the DSP board and disconnect the

44、wires from the connectors (CN661, CN682, and CN683) on the forward side of the DSP board. (See Fig.6) (5) Disconnect the card wires from the connectors (CN651, CN652) on the DSP board. (See Fig.6) (6) Take out the DSP board from the main body. Fig.5 Fig.6 Fan motor assembly CN103 Main amplifier boar

45、d F Fan motor F Fan bracket E E Rear panel G J HK HDMI board CN771 CN762 CN651 CN681 DSP board CN661 CN683 CN682 CN652 CN731 CN732 1-8 (No.MB500) 3.1.6Removing the SCART board (See Fig.7 and 8) Remove the top cove, USB board, DSP board and HDMI board. (1) Remove the six screws L attaching the SCART

46、board. (See Fig.7) (2) Disconnect the card wire from CN537 and CN539 of the SCART board. (See Fig.8) Fig.7 Fig.8 3.1.7Removing the input board (See Fig.9 and 10) (1) Remove the seven screws M attaching the input board.(See Fig.9) (2) Remove the three screws N attaching the input board. (See Fig.10)

47、(3) Disconnect the each wire from each connector of the input board. Fig.9 Fig.10 3.2Other item For the other items, please refer to RX-D701S,RX-D702B No.MB441. LLL CN537 SCART board CN539 M N Input board (No.MB500)1-9 SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. SECTION 5

48、TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.MB500) Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Victor Company of Japan, Limited VPT Printed in Japan SCHEMATIC DIAGRAMS RX-D701SB,RX-D701SE,RX-D701SEN RX-D702BB,RX-D702BE,RX-D702BE

49、N Contents Block diagrams Standard schematic diagrams Printed circuit boards 2-1 2-2 2-15 to 21 CD-ROM No.SML200601 AUDIO/VIDEO CONTROL RECEIVER No.MB500SCH 2006/1 COPYRIGHT 2006 Victor Company of Japan, Limited. Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) 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