JVC-RXD402B-avr-sch维修电路原理图.pdf

《JVC-RXD402B-avr-sch维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-RXD402B-avr-sch维修电路原理图.pdf（87页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB448 2005/9 AUDIO/VIDEO CONTROL RECEIVER MB44820059 RX-D402B, RX-D401S Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 5TROUBLESHOOTING . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Area suffix J - U.S.A. RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB448) SPECIFICATION *Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz).

5、Designs and specifications are subject to change without notice. AmplifierOutput Power At stereo operationFront channels110 W per channel, min. RMS, driven into 6 at 20 Hz to 20 kHz with no more than 0.8% total harmonic distortion. At surround operationFront channels110 W per channel, min. RMS, driv

6、en into 6 at 1 kHz with no more than 0.8% total har- monic distortion. Center channel110 W, min. RMS, driven into 6 at 1 kHz,with no more than 0.8% total harmonic distortion. Surround channels110 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total har- monic distortion. Sur

7、round back channels110 W per channel, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total har- monic distortion. AudioAudio Input Sensitivity/ Impedance DVR/DVD, VCR, DBS, TV270 mV/47 k Audio Input (DIGITAL IN)* CoaxialDIGITAL IN 1(DVR/DVD): 0.5 V(p-p)/75 OpticalDIGITAL IN 2(DBS), 3(VCR):

8、 -21 dBm to -15 dBm (660 nm 30 nm) USBUSB Audio Output LevelDVR, VCR270 mV 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, 4 kHz, 16 kHz Control range8

9、dB VideoVideo Input Sensitivity/ Impedance Composite video:DVR/DVD, VCR, DBS1 V(p-p)/75 S-video:DVR/DVD, VCR, DBSY (luminance): 1 V(p-p)/75 C (chrominance, burst):0.286 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 vide

10、o: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONITOR OUTY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.286 V(p-p)/75 Component: MONITOR OUTY (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)MONIT

11、OR OUT FM tuner (IHF) Tuning Range87.5 MHz to 108.0 MHz Usable SensitivityMonaural12.8 dBf (1.2 V/75 ) 50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 ) Stereo37.5 dBf (20.5 V/75 ) Stereo Separation at REC OUT35 dB at 1 kHz AM tunerTuning Range530 kHz to 1 710 kHz GeneralPower RequirementsAC 12

12、0 V , 60 Hz Power Consumption150 W/200 VA (at operation) 0.9 W (in standby mode) Dimensions (W H D)435 mm 91.5 mm 371 mm (17 3/16 inch- es 3 5/8 inches 14 5/8 inches) Mass7.1 kg (15.7 lbs) RadioFans.CN 收音机爱 好者资料库 (No.MB448)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this produc

13、t 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. Servi

14、ces 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 manufac

15、ture 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 necess

16、arily 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

17、 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 ro

18、uted 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 s

19、hould 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, con

20、trol 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 t

21、he 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 s

22、ensitivity 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, particula

23、rly 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 equ

24、ipment 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 critic

25、al 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.

26、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 th

27、em, 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.M

28、B448) 1.5Importance administering point on the safety Caution: For continued protection against risk of fire, replace only with same type 4 A/125 V for F101, 4 A/125 V for F102, 6.3 A/125 V for F103. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplace

29、z le fusible de surete de F101 comme le meme type que 4 A/125 V, 4 A/125 V pour F102, et 6,3 A/125V pour F103. Ce sont des fusibles suretes qui functionnes rapide. Primary board (Forward side) F103 Main amplifier board (Forward side) F102 F101 (No.MB448)1-5 1.6Caution after repairs There are two pow

30、er supply as the second power supply of the transformer. One is a power supply for power IC(3pin), and another is a power supply for the control(5pin). There are two power supply as the second power supply of the transformer. One is a power supply for power IC(3pin), and another is a power supply fo

31、r the control(8pin). Please connect first of all and confirm the power supply for the control when you do the energizing examination after it completes of the repair. Please never do the energizing examination in a power supply of power IC alone. Moreover, when the control system breaks down, power

32、IC is occasionally damaged. +B for power IC (3pins) +B for control section (8pins) For power IC(3pins) 1-6 (No.MB448) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB448)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing th

33、e top cover (See Figs.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 B and screw C attaching the top cover. (See Fig.2) (3) Remove the top cover in the direction of the a

34、rrow. (See Fig.1.) Fig.1 Fig.2 3.1.2Removing the HDMI board (See Fig.3) Remove the top cover. (1) From the back side of the main body, remove the three screws D attaching the HDMI board to the rear panel. (2) From the top side of the main body, remove the screw E at- taching the HDMI board to the su

35、pport bracket. (3) Disconnect the card wires from the connectors (CN731, CN732, CN762) on the HDMI board. (4) Take out the HDMI board from the main body and discon- nect the parallel wires from the connectors (CN771, CN772) on the reverse side of the HDMI board. Reference: Remove the shield from the

36、 HDMI board as required. Fig.3 A Top cover B Top cover BB C E D Shield CN732 CN731 CN771 CN762 CN772HDMI board Rear panel Support bracket 1-8 (No.MB448) 3.1.3Removing the front panel assembly (See Figs.4 and 5) Remove the top cover and HDMI board. (1) From the top side of the main body, remove the t

37、ie band bundling the wires. (See Fig.4.) Reference: After reassembling, bundle the wires with a new tie band as before. (See Fig.4.) (2) Release the wire holders bundling the wires. (See Fig.4) (3) Disconnect the card wire from the connector CN102 on the main amplifier board. (See Fig.4) (4) Disconn

38、ect the wire from the connector CN351 on the main amplifier board. (See Fig.4) (5) Disconnect the wire from the connector CN552 on the input board. (See Fig.4) (6) Disconnect the wire from the connector CN661 on the DSP board. (See Fig.4) (7) Remove the three screws F attaching the front panel as- s

39、embly. (See Fig.4) (8) Remove the screw F attaching the OSD connect 2 board. (See Fig.4) (9) From the bottom side of the main body, remove the four screws F attaching the front panel assembly. (See Fig.5) (10) Release the joints a and remove the front panel assembly in the direction of the arrow. (S

40、ee Fig.5) Fig.4 Fig.5 F F Tie bandWire holders Wire holder CN552 Input board CN661 CN351 DSP board OSD connect 2 board CN102 F F Wire holder Main amplifier board F Front panel assembly F a (No.MB448)1-9 3.1.4Removing the rear panel (See Fig.6) Remove the top cover. (1) From the back side of the main

41、 body, remove the strain re- lief from the rear panel in the direction of the arrow and re- move the power cord. (2) Remove the three screws G and twenty-seven screws H attaching the rear panel. Fig.6 3.1.5Removing the tuner (See Fig.7) Remove the top cover. (1) From the top side of the main body, d

42、isconnect the card wire from the connector CN1 on the tuner. (2) From the back side of the main body, remove the two screws J attaching the tuner to the rear panel and take out the tuner. 3.1.6Removing the subwoofer board (See Fig.7) Remove the top cover. (1) From the top side of the main body, disc

43、onnect the wire from the connector CN524 on the subwoofer board. (2) From the back side of the main body, remove the screw K attaching the subwoofer board to the rear panel and take out the subwoofer board. 3.1.7Removing the DSP board (See Fig.7) Remove the top cover. (1) From the back side of the m

44、ain body, remove the five screws M attaching the DSP board to the rear panel. (2) Remove the screw N attaching the DSP board. (3) Disconnect the DSP board from the DSP connect board while releasing the claw b of the connector CN681 on the DSP board. Note: When releasing the claw b, take care not to

45、break it. (4) Take out the DSP board and disconnect the wires from the connectors (CN661, CN682, CN683) on the forward side of the DSP board. (5) Disconnect the card wires from the connectors (CN651, CN652) on the forward side of the DSP board. Fig.7 Strain relief H Rear panel Power cord GHH GH N CN

46、682 CN683 DSP board CN661CN652 CN651Tuner Rear panelRear panel CN1CN524 Subwoofer board KJM CN681 DSP board b DSP connect board 1-10 (No.MB448) 3.1.8Removing the compulink board (See Fig.8) Remove the top cover and HDMI board. (1) From the top side of the main body, disconnect the wire from the conn

47、ector CN565 on the compulink board. (2) From the back side of the main body, remove the screw P attaching the compulink board to the rear panel and take out the compulink board. 3.1.9Removing the primary board (See Fig.8) Remove the top cover and HDMI board. (1) From the top side of the main body, r

48、emove the screw Q attaching the support bracket on the chassis base. (2) Release the wire holders and disconnect the wire from the connector CN101 on the main amplifier board. (3) Disconnect the power cord from the connector CN120 on the primary board. (4) Remove the two screws R and two screws R at

49、taching the primary board. Reference: When attaching the screws R, attach the wire holders with them as before. (5) Take out the primary board from the main body and remove the wires from the soldered sections c on the reverse side of the primary board. Fig.8 R R c R R Q P Compulink board Rear panel Wire holder CN120 Support bracket Main amplifier board Wire holderCN101 Wire holder Chassis basePrimary board CN565 (No.MB448)1-11 3.1.10 Removing the power transformer (See Fig.9) Remove the top cover. (1) From the top