JVC-RXD302B-avr-sch维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB479 2005/10 AUDIO/VIDEO CONTROL RECEIVER MB479200510 RX-D301S, RX-D302B 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 5TROUBLESHOOTING . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 Area suffix RX-D301S Area suffix RX-D302B B - U.K. E - Continental Europe EN - Northern Europe A - Australia B - U.K. E - Continental Europe EN - Northern Europe RadioFans.CN 收音机爱 好者

5、资料库 1-2 (No.MB479) SPECIFICATION *2: Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz). Designs and specifications are subject to change without notice. Amplifier Output Power At stereo operationFront channels110 W per channel, min. RMS, driven i

6、nto 6 at 1 kHz with no more than 0.8% total harmonic dis- tortion. At surround operationFront channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis- tortion. Center channel110 W, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic d

7、istortion. Surround channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis- tortion. Surround back channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis- tortion. AudioAudio Input Sensitivity/Impedance DVR

8、/DVD (DVD MULTI), VCR, DBS, TV270 mV/47 k Audio Input (DIGITAL IN)*1Coaxial: 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) USB: USB WIRELESSUSB TERMINAL Audio Output LevelDVR, VCR270 mV Signal-to-Noise Ratio (66 IHF/78 IHF)80 dB/62 dB Frequenc

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

10、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/ImpedanceComposite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONITOR OUTY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 V(p-p)/75 Co

11、mponent: MONITOR OUTY (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 SynchronizationNegative FM tuner (IHF) Tuning Range87.50 MHz to 108.00 MHz Usable SensitivityMonaural12.8 dBf (1.2 V/75 ) for A version 17.0 dBf (1.9 V/75 ) for Europe version 50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 )

12、for A version 21.3 dBf (3.2 V/75 ) for Europe version Stereo37.5 dBf (20.5 V/75 ) for A version 41.3 dBf (31.8 V/75 ) for Europe version Stereo Separation at REC OUT35 dB at 1 kHz AM tuner Tuning Range531 kHz to 1 710 kHz (at 9 kHz intervals) 522 kHz to 1 629 kHz (at 10 kHz intervals) General Power

13、RequirementsAC 240 V ,50 Hz for A version AC 230 V , 50 Hz for Europe version Power Consumption180 W (at operation) 5.8 W (in standby mode) for A version 0.9 W (in standby mode) for Europe version Dimensions (W H D)435 mm 91.5 mm 371 mm Mass6.8 kg USB WIRELESS SYSTEMThe USB wireless transmitter supp

14、lied with this re- ceiver supports Direct Sequence Spreading Spec- trum (DSSS) using 2.4 GHz frequency band. RadioFans.CN 收音机爱 好者资料库 (No.MB479)1-3 SECTION 1 PRECAUTIONS 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safe

15、ty 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 d

16、esign 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 therefr

17、om. (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, w

18、att- 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 re

19、placement 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 separa

20、ted 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

21、. (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

22、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 c

23、hassis, 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

24、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

25、 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 standard

26、s. (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

27、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

28、-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 ma

29、nufacturer. (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.MB479) 1.5 Safety Precautions (U.K only) (1) This design of this product contain

30、s 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 writing by the manufacturer. Replace- ment parts must be identical to those used in the original circuits. (2) Any unau

31、thorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the

32、 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 safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than speci

33、fied 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, or other hazards. (4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the lik

34、e 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

35、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. (3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (4) Repairs

36、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 provided, check setting for local voltage. Burrs formed during molding may be left over on some parts of the chassis. Th

37、erefore, pay attention to such burrs in the case of preforming repair of this system. (No.MB479)1-5 1.6Caution after repairs 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 for the control(8pin). There

38、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 for 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

39、 repair. Please never do the energizing examination in a power supply of power IC alone. Moreover, when the control system breaks down, power IC is occasionally damaged. +B for power IC (3pins) +B for control section (8pins) For power IC(3pins) 1-6 (No.MB479) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS

40、This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB479)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the 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

41、of the main body, remove the five screws 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 A Top co

42、ver B Top cover BB C B Top cover BB C For Australia For Europe 1-8 (No.MB479) 3.1.2Removing the front panel assembly (See Figs.3 and 4) Remove the top cover. Reference: Remove the tie bands and wire holder bundling the wires. (1) Disconnect the card wire from the connector CN102 on the main amplifie

43、r board. (See Fig.3) (2) Disconnect the wire from the connector CN351 on the main amplifier board. (See Fig.3) (3) Disconnect the wire from the connector CN552 on the input board. (See Fig.3) (4) Disconnect the wire from the connector CN661 on the vol- ume board. (See Fig.3) (5) Remove the three scr

44、ews D attaching the front panel as- sembly. (See Fig.3) (6) Remove the screw D attaching the OSD connect 2 board. (See Fig.3) (7) From the bottom side of the main body, remove the four screws E attaching the front panel assembly. (See Fig.4) (8) Release the joints a and remove the front panel assemb

45、ly in the direction of the arrow. (See Fig.4) Fig.3 Fig.4 D Front panel assembly D D OSD connect 2 board Main amplifier board CN351 Volume board CN552 Input board CN661 For Australia For Europe D Front panel assembly D D OSD connect 2 board Main amplifier board CN351 Volume board CN552 Input board C

46、N661 CN102 CN102 E Front panel assembly E aa (No.MB479)1-9 3.1.3Removing the rear panel (See Fig.5) 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 and re- move the power cord. (2) Remove the twenty-nine scre

47、ws F attaching the rear panel. For Australia (3) Remove the thirty screws F attaching the rear panel. For Europe (4) Remove the nut and washer attaching the coaxial connec- tor to the rear panel. Fig.5 Strain relief F Rear panel Power cord F F Strain relief F Rear panel Power cord FF For Australia F

48、or Europe F Rear panel Coaxial connector Nut and washer Rear panel Coaxial connector Nut and washer F 1-10 (No.MB479) 3.1.4Removing the tuner (See Fig.6) Remove the top cover. (1) Disconnect the card wire from the connector CN1 on the tuner. (2) From the back side of the main body, remove the two sc

49、rews G attaching the tuner to the rear panel and take out the tuner. 3.1.5Removing the subwoofer board (See Fig.6) Remove the top cover. (1) Disconnect the wire from the connector CN524 on the sub- woofer board. (2) From the back side of the main body, remove the screw H attaching the subwoofer board to the rear panel and take out the subwoofer board. 3.1.6Removing the front video board (See Fig.6) Remove the top cover. Reference: Rem