JVC-RXDP20VBK-avr-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.22008 2003/7 AUDIO/VIDEO CONTROL RECEIVER RX-DP20VBK TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2S

2、PECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4

3、ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . 1-21 AUD O/V DEO CONTROL RECE VER RX DP20V STANDBY/ON STANDBY PHONES D MMER CC CONVERTER ZONE 1 ON/OFF ZONE 2 ON/OFF DOOR UP DOOR DOWN MASTER VOLUME S-V DEOD G TALVIDEOLAUDIOR VIDEO CHANNEL TV VIDEO MUT NG DVD N/ FO /O F ST NDB / NST NDB / N S AND Y TBS ON D MUCD C R HO O PE M XT 7 C AN LOG D G

5、 T L CC CO VER ER FFECT L V NESS SOUND EST THX X ES 7 1AN LOG DI ECT SLEEPDIMMER M MODE DSPURR DSPS RROUND RE URN0+ O F NPU SET TU M N A JU ENU DVD ME U E IT T XT I P A 123 456 7/89 10100 TV VOL VOLUME TUN NG STOPPAU E FF REW REC PLAY DOWNUP RM SR DP20J REOTE CO TROL A V CONTROL RECE VER CR 1CR 2 FM

6、 AMID OV DB ZO E 2 TR NSMTEA N ONE 1 Z NE 1 ZONE 2L ARNZO E 1 TV CA V BS Area Suffix J - U.S.A. C - Canada RadioFans.CN 收音机爱 好者资料库 1-2 (No.22008) SPECIFICATION AmplifierOutput PowerAt Stereo operation (Analog Direct On) Front channels 120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with

7、 no more than 0.02% total harmonic distortion. 120 W per channel, min. RMS, driven into 4 , 20 Hz to 20 kHz with no more than 0.07% total harmonic distortion. At Surround operation (Analog Direct On) Front channels 120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more than 0.02%

8、total harmonic distortion. Center channel 120 W, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more than 0.02% total harmonic distortion. Surround channels 120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more than 0.02% total harmonic distortion. Surround back channels 120 W

9、 per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more than 0.02% total harmonic distortion. AudioAudio Input Sensitivity /Impedance (1 kHz) PHONO IN (MC)0.25 mV/100 (MM)2.5 mV/47 k CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN200 mV/47 k DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO200

10、 mV/47 k Audio Input (DIGITAL IN)* Coaxial1(DVD), 2(CD), 3(TV/DBS) 0.5 V(p-p)/75 Optical4(CDR), 5(MD), 6(VCR1)-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) Audio Output LevelZONE 2 PREOUT2

11、00 mV PREOUT1 V Recording Output Level TAPE/MD OUT, CDR OUT, VCR 1 OUT, VCR 2 OUT 200 mV Digital outputOpticalDIGITAL OUT Signal wave length660 nm Output level Signal-to-Noise Ratio (66 IHF/78 IHF) (Analog Direct On) PHONO IN (MC)60 dB/72 dB (at REC OUT) (MM)72 dB/80 dB (at REC OUT) CD IN, CDR IN, T

12、APE/MD IN, EXT 7.1CH IN92 dB/80 dB DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO92 dB/80 dB Frequency Response (8 ) PHONO IN (MC) 20 Hz to 20 kHz (1 dB) (MM)20 Hz to 20 kHz (1 dB) CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN10 Hz to 100 kHz (+1 dB, -3 dB) DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN,

13、 VIDEO10 Hz to 100 kHz (+1 dB, -3 dB) RIAA Phono Equalization1.0 dB (20 Hz to 20 kHz) VideoVideo Input Sensitivity /Impedance Composite video DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO 1 V(p-p)/75 S-video DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO (Y: luminance)1 V(p-p)/75 (C: chromi

14、nance, burst)0.286 V(p-p)/75 Component 1 IN (DVD), 2 IN,3 IN (Y: luminance)1 V(p-p)/75 (PB, PR)0.7 V(p-p)/75 Video Output Level Composite video VCR 1 OUT,VCR 2 OUT,MONITOR OUT 1 V(p-p)/75 S-video VCR 1 OUT, VCR 2 OUT, MON- ITOR OUT (Y: luminance)1 V(p-p)/75 (C: chrominance, burst)0.286 V(p-p)/75 Com

15、ponent MONITOR OUT (Y: luminance)1 V(p-p)/75 (PB, PR): 0.7 V(p-p)/75 SynchronizationNegative Signal-to-Noise Ratio45 dB RadioFans.CN 收音机爱 好者资料库 (No.22008)1-3 Designs & specifications are subject to change without notice. FM tuner (IHF) Tuning Range87.5 MHz to 108.0 MHz Usable SensitivityMonaural12.8

16、 dBf (1.2 V/75 ) 50 dB Quieting SensitivityMonaural18.2 dBf (2.2 V/75 ) Stereo38.2 dBf (22.3 V/75 ) Signal-to-Noise Ratio (IHF-A weighted)Monaural78 dB at 85 dBf Stereo73 dB at 85 dBf Total Harmonic DistortionMonaural0.2% at 1 kHz Stereo0.3% at 1 kHz Stereo Separation at REC OUT40 dB at 1 kHz Altern

17、ate Channel Selectivity60 dB (400 kHz) Frequency Response30 Hz to 15 kHz (+0.5 dB, -3 dB) AM tunerTuning Range530 kHz to 1 710 kHz Usable SensitivityLoop antenna: 400 V/m Signal-to-Noise Ratio50 dB (100 mV/m) GeneralPower Requirements AC 120V, 60 Hz Power Consumption580 W/690 VA (at operation) 2.7 w

18、atts (in standby mode) Dimensions (W H D)445 mm 177 mm 475 mm (17 9/16 in. 7 in. 18 3/4 in.) Mass23.5 kg (52 lbs) 1-4 (No.22008) 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

19、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

20、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 electr

21、ical 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. Repl

22、acement 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 doe

23、s 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

24、, 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

25、 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

26、 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

27、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 cap

28、acitor 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

29、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 le

30、gal 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 set

31、ting 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 sid

32、e (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 r

33、egulation 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 (No.22008)1-5 1.5Importance administering point on the safety Caution: For continued protection against ris

34、k of fire, replace only with same type 8A/250V for F21, 0.5A/250V for F41 and 2A/125V for F42 and F43. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F21 comme le meme type que 8A/250V, et 0.5A/250V pour F41, et 2A/125V p

35、our F42 et F43. Ce sont des fusibles suretes qui functionnes rapide. C21 C22 C23 C24 C25 C26 C27 PW23 PW21 WR26 PW22 D21 D22 D23 D24 D25 D26 D27 R26 Q21 Q22 Q23 R21 R22 R23 R24 R25 RY21 T21 PW25 PW26 R27 R28 CN25 EP21 PW24 EP22 FC22 FC21 C41 C42 CN41 C43 D45 Q53 Q54 Q55 FC41 FC42 R51 R54 R42 T42 WR4

36、1 WR42 R41 C60 D41 TW51 FC43 FC44 R57 C40 WR48 C44 C49 C45 C46 C47 C48 R4011 R4012 C53 C54 C55 C56 R43 CN47 C59 IC44 D4001 D4002 D4003 D4004 C57 C58 R45 C51 D51 Q45 Q46 Q47 D48 D49 D50 FC401 FC402 TW42 CN46 Q41 Q42 Q43 Q44 C52 R55 R56 T41 R46 R47 R48 R49 R50 TH41 TW41 CN44 CN45 1-6 (No.22008) SECTIO

37、N 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.22008)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Fig.1) (1) Remove the eight screws A attaching the top cover on both sides of the body. (2) Remove the thre

38、e screws B on back of the body. (3) Remove the top cover from behind in the direction of the ar- row while pulling both sides outward. Fig.1 3.1.2Removing the front panel assembly (See Fig.2 and 3) Prior to performing the following procedure, remove the top cover. (1) Cut off the tie band 1 fixing t

39、he harness. (2) Remove the screw a, and remove the lug wire. (3) Remove the three screws C attaching the front panel as- sembly. (4) Remove the four screws D attaching the front panel as- sembly on bottom of the body. Detach the front panel as- sembly toward the front. (5) Disconnect the harness fro

40、m the connector CN971, CN977, CN983 and CN985 on the system control board (see fig.5), CN973 on the front AV in board and CN373 on the front DIGITAL board (see 2-3.Front panel assembly section/ fig.2). Fig.2 Fig.3 A(both sides) A(both sides) B Top cover C a (fixing the lug wire) Tie band 1 Harness b

41、and Tuner unit Compu link board Audio 7.1ch in board V compo 2 board Y/C separator board RF remote unit CN1 CN1 C Front panel assembly CN581 CN481 CN482 CN301 CN201 Tie band 2 Tie band 3 Audio signal 1 board D D Front panel assembly 1-8 (No.22008) 3.1.3Removing the V compo 2 board & RF remote unit &

42、 tuner unit & compu link board (See Fig.2 and 4) Prior to performing the following procedure, remove the top cover. (1) Disconnect the harness from the connector CN581 on the V compo 2 board. Remove the two screws E attaching the V compo 2 board to the rear panel. (2) Disconnect the harness from the

43、 connector CN1 on the RF remote unit. Remove the nut b attaching the RF remote unit to the rear panel. (3) Disconnect the card wire from the connector CN1 on the tuner unit. Remove the two screws E attaching the tuner unit to the rear panel. (4) Disconnect the harness from the connector CN301 on the

44、 compu link board. Remove the four screws E attaching the compu link board to the rear panel. 3.1.4Removing the Y/C separator board (See Fig.2) Prior to performing the following procedure, remove the top cover. (1) Cut off the tie band 2 fixing the harness. (2) Draw out up the Y/C separator board, d

45、isconnecting the connectors CN481 and CN482 on the Y/C separator board. 3.1.5Removing the audio 7.1ch in board (See Fig.2 and 4) Prior to performing the following procedure, remove the top cover. (1) Cut off the tie band 2 & 3 fixing the harness. (2) Disconnect the harness from the connector CN201 o

46、n the audio signal 1 board. (3) Remove the two screws E attaching the audio 7.1ch in board to the rear panel. 3.1.6Removing the rear panel (See Fig.4) Prior to performing the following procedure, remove the top cover. (1) Unsolder the two solder parts on the AC inlet. (2) Remove the forty four screw

47、s E & E & E & E & E and the nut b attaching each board to the rear panel. (3) Remove the thirteen screws F attaching the rear panel on the back of the body and bottom. Fig.2 Fig.4 C a (fixing the lug wire) Tie band 1 Harness band Tuner unit Compu link board Audio 7.1ch in board V compo 2 board Y/C s

48、eparator board RF remote unit CN1 CN1 C Front panel assembly CN581 CN481 CN482 CN301 CN201 Tie band 2 Tie band 3 Audio signal 1 board bE F E E FF F F Rear panel Red Black E E EEE E E F Solder part AC inlet (No.22008)1-9 3.1.7Removing the system control board (See Fig.5 and 6) Prior to performing the

49、 following procedure, remove the top cover and front panel assembly. (1) Disconnect the card wires and harness from the connector CN963, CN964 and CN981 on the system control board. (2) Cut off the tie bands fixing the harness. (3) Disconnect the harness from the connector CN45 on the power supply 2 board and CN25 on the power/ fuse board. (4) Disconnect the connector CN324 on the audio signal 2 board and