JVC-RX5040B-avr-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 Victor Company of Japan, Limited No.MB269 2004/6 AUDIO/VIDEO CONTROL RECEIVER MB26920046 RX-5040B TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . 1-5 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . 1-13 Area suffix UJ - U.S.Military RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB269) SPECIFICATION *1: Measured on AC 110 V, 127 V, 220 V, and 240 V *2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz) Designs and specificati

5、ons are subject to change without notice. Amplifier Output Power At Stereo operationFront channels100 W*1 per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion (IEC268-3/DIN). At Surround operationFront channels100 W per channel, min. RMS, driven into 8 , a

6、t 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 channels 100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. AudioAudio Inp

7、ut Sensitivity/Im- pedance (1 kHz) CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 k Audio Input (DIGITAL IN)*2 CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 Audio Input Sensitivity/Im- pedance (1 kHz) OpticalDIGITAL 2 (CD):-21 dBm to -15 dBm (660 nm 30 nm) Recording Output LevelTAPE/CDR, VCR:220 mV Signal-to-Noi

8、se Ratio(66 IHF/DIN) CD, TAPE/CDR, VCR, TV SOUND, DVD:87 dB/62 dB Frequency Response (8 ) CD, TAPE/CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB) Equalization (5 bands)63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz:8 dB (in 2 dB steps) VideoVideo Input Sensitivity/Im- pedance Composite videoDVD, VCR:1

9、V(p-p)/75 Video Output LevelComposite videoVCR, MONITOR OUT:1 V(p-p)/75 SynchronizationNegative Signal-to-Noise Ratio45 dB FM tuner (IHF) Tuning Range87.50 MHz to 108.00 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

10、V/75 ) Stereo Separation at OUT (REC)35 dB at 1 kHz AM tuner Tuning Range531 kHz to 1 602 kHz (at 9 kHz intervals) 530 kHz to 1 600 kHz (at 10 kHz intervals) General Power RequirementsAC 110 V/127 V/220 V/230 V - 240 V , adjustable with the voltage selector, 50 Hz/60 Hz Power Consumption210 W (at op

11、eration) 4.5 W (in standby mode) Dimensions (W H D)435 mm 146.5 mm 369.5 mm Mass8.0 kg RadioFans.CN 收音机爱 好者资料库 (No.MB269)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 cont

12、inued 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 t

13、he 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

14、 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. Replacem

15、ent 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 no

16、t 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, hi

17、gh 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 haz

18、ard 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

19、 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

20、 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 capacit

21、or 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

22、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

23、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

24、 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 (p

25、arts 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 regul

26、ation 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.MB269) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE I

27、NSTRUCTIONS. (No.MB269)1-5 SECTION 3 DISASSEMBLY 3.1Removing 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

28、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 3.2Removing 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 connect

29、or CN402 on the front board. (See Fig.2.) (2) Disconnect the card wire from the connector CN201 on the main board. (See Fig.2.) (3) Remove the tie band and wire protection board fixing the card wire. (See Fig.2.) (4) Remove the three screws C attaching the front panel as- sembly. (See Fig.2.) (5) Fr

30、om 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 ar- row. (See Fig.3.) Fig.2 Fig.3 B A A 2 1 1 Top cover C Front panel assembly Card wire CN201 Main board Tie band Wire protectio

31、n board Card wire CN402 Front board CC DD Front panel assembly 1-6 (No.MB269) 3.3Removing 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 re- lief from the rear panel in the direction of the arr

32、ow. (2) Remove the twenty-one screws E attaching the rear panel. (3) Remove the two screws F attaching the rear panel. Fig.4 3.4Removing the tuner (See Figs.5 and 6) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the two screws G a

33、ttaching the tuner to the rear panel. (See Fig.5.) (2) From the top side of the main body, disconnect the card wire from the connector CN411 on the front board. (See Fig.6.) (3) Take out the tuner. Fig.5 Fig.6 E E E EEE Strain relief Rear panel F G Rear panel Card wire CN411 Front board Tuner (No.MB

34、269)1-7 3.5Removing the DSP board, audio input board, DVD board and video board (See Fig.7) Prior to performing the following procedure, 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) Di

35、sconnect 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.7 3.6Removing the front board (See Fig.8) Prior to performing the foll

36、owing 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 m

37、ain board and front board. (3) Disconnect the wires from the connectors (CN471, CN472, CN473) on the front board. (4) Remove the two screws H attaching the front board. (5) Loosen the screw J attaching the front board. (6) Take out the front board from the main body. Fig.8 3.7Removing the speaker te

38、rminal board (See Fig.9) 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.9 CN481 Front board DVD boardVideo board CN421 Audio input board DSP board

39、 CN431 CN441 CN482 CN491 CN402 Front board Relay board Main board H H J CN473 CN471 CN472 CN291 Card wire Soldered sections a Parallel wires Speaker terminal board 1-8 (No.MB269) 3.8Removing the power amplifier board (See Fig.10) Prior to performing the following procedures, remove the top cover. (1

40、) From the top side of the main body, remove the tie bands fixing the wires. (2) Remove the tie band and wire protection board fixing the card wire. (3) Remove the solders from the soldered section b on the speaker terminal board attaching the parallel wires. (4) Disconnect the relay board from the

41、connectors (CN291, CN491) on the main board and front board. (5) Disconnect the parallel wire from the connector CN241 on the main board. (6) Disconnect the wire from the connector CN251 on the pow- er transformer board 1. (7) Disconnect the wires from the connectors (CN471, CN472, CN473) on the fro

42、nt board. (8) Remove the screw J, two screws K and four screws L at- taching the power amplifier board. (9) Take out the power amplifier board from the main body. Fig.10 3.9Removing the heat sink (See Figs.11 and 12) Prior to performing the following procedures, remove the top cover and power amplif

43、ier board. (1) Remove the three screws M attaching the heat sink. (See Fig.11) (2) From the reverse side of the power amplifier board, remove the two screws N attaching the heat sink. (See Fig.12) 3.10 Removing the power ICs (See Figs.12) Prior to performing the following procedures, remove the top

44、cover, power amplifier board and heat sink. (1) From the reverse side of the power amplifier board, remove the solders from the soldered sections c on the power am- plifier board. (2) Remove the power ICs from the forward side of the power amplifier board. Fig.11 Fig.12 Soldered section b CN471 CN47

45、2 CN491 Front board CN473 Card wire K L Tie band Wire protection board L Tie bands Power amplifier board Relay board L CN241 Main board CN251 Tie band CN291 Power transformer board 1 J Parallel wires Speaker terminal board Heat sink Power amplifier board M Power IC Heat sink NN Power amplifier board

46、 Soldered section c (No.MB269)1-9 3.11 Removing the voltage selector board (See Figs.13 and 14) Prior to performing the following procedure, remove the top cover. (1) From the back side of the main body, remove the two screws P attaching the voltage selector board. (See Fig.13) (2) Remove the solder

47、s from the soldered sections d on the power transformer board 2. (See Fig.14) (3) Remove the tie band fixing the wires. (See Fig.14) (4) Take out the voltage selector board. Fig.13 Fig.14 3.12 Removing the power transformer (See Fig.15) Prior to performing the following procedures, remove the top co

48、ver and voltage selector board. (1) From the top side of the main body, remove the tie bands fixing the wires. (2) Remove the solders from the soldered section e on the power transformer board 1. (3) Remove the solders from the soldered sections f on the power transformer board 2. (4) Disconnect the

49、 wire from the connector CN251 on the pow- er transformer board 1. (5) Remove the four screws Q attaching the power transform- er. (6) Take out the power transformer from the main body. 3.13 Removing the power/fuse board (See Fig.15) Prior to performing the following procedures, remove the top cover and voltage selector board. (1) From the back and top sides of the main body, remove the screw R and screw S attaching the power/fuse board. (2) Remove the solders from the soldered sections g attaching the power cord. (3) From the reverse si