JVC-RX7020RBK-avr-sm维修电路原理图.pdf

《JVC-RX7020RBK-avr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-RX7020RBK-avr-sm维修电路原理图.pdf（65页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL AUDIO/VIDEO CONTROL RECEIVER No.21101 May. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. RX-7022RSL RX-7020RBK RX-7022RSL/RX-7020RBK Contents Safety precautions -1-2 Disassembly method -1-3 Adjustment method -1-8 Description of major ICs -1-924 RX-7022RSL Area suffix B - U.K. E -

2、Continental Europe EN - Northern Europe EV - Eastern Europe RX-7020RBK Area suffix E - Continental Europe DVDVCRTV SOUND/DBS ADJUST RX-7022RAUDIO/VIDEO CONTROL RECEIVER SETTING MASTER VOLUME CONTROL DOWNUP CDTAPE/CDR SOURCE NAME BASS BOOST INPUT ANALOG/DIGITAL SPEAKERS ON/OFF SURROUND MODE PHONES SU

3、RROUND ON/OFF FM/AM TUNING STANDBY STANDBY/ON FM/AM PRESETFM MODE MEMORY INPUT ATT FM/AM DVD MULTI PHONO SOURCE NAME 12 COMPULINK Remote DISPLAY MODEDIMMERPTY SEARCHTA/NEWS/INFO CONTROL 231 564 897/P 0+1010 BASS BOOSTEFFECT MENU ENTER TEST REARL + DIMMER SUB WOOFER + REARR + MUTING CHTV VOL /REWFF/

4、TA/NEWS/INFO VOLUME CA TV/DBS CONTROL TV/VIDEO REC PAUSE RETURNFM MODE100+ CONTROL A/V CONTROL RECEIVER RM-SRX7022R REMOTE CONTROL CATV/DBSVCRTVAUDIO SURROUND MODEINPUTON/OFF DVD MULTIDVDCD TAPE/CDR TREBLE TV/DBSVCRPHONO FM/AM BASS SURROUNDANALOG/DIGIT ALSLEEP CENTER + TUNING SOUND PTY PTY SEARCH PT

5、Y DISPLAY MODE Model panel color top cover RX-7022RSL silver silver RX-7020RBK black black RadioFans.CN 收音机爱 好者资料库 RX-7022RSL/RX-7020RBK 1-2 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes s

6、hould 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 performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not be made. An

7、y 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 and mechanical parts in the produ

8、cts have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safet

9、y characteristics are identified in the Parts List of Service 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 not have the same safety characteristics as

10、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, high temperature parts, moving parts and/or sha

11、rp 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 re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re

12、-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna 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 use a line isolation

13、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, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leaka

14、ge current 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 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an expose

15、d 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 meausre the AC voltage across the resistor. Now, reverse

16、 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. This equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to e

17、nsure 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 for local voltage. Good earth ground

18、Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE ! 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. In rega

19、rd 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. (This regulation does not correspond to J and C ver

20、sion.) RadioFans.CN 收音机爱 好者资料库 RX-7022RSL/RX-7020RBK 1-3 Remove the four screws A attaching the top cover on both sides of the body. Remove the three screws B on the back of the body. Remove the top cover from behind in the direction of the arrow while pulling both sides outward. 1. 2. 3. Disassembl

21、y method Removing the top cover (See Fig.1) Prior to performing the following procedure, remove the top cover. Remove the power cord stopper from the rear panel by moving it in the direction of the arrow. Remove the twenty-seven screws E attaching the each boards to the rear panel on the back of the

22、 body. Remove the four screws F attaching the rear panel on the back of the body. 1. 2. 3. Removing the rear panel (See Fig.4) Prior to performing the following procedure, remove the top cover. Disconnect the card wire from connector CN402 CN403 on the audio board and CN201 on the power supply board

23、 in the front panel assembly. Cut off the tie band fixing the harness. Remove the three screws C attaching the front panel assembly. Remove the four screws D attaching the front panel assembly on the bottom of the body. Detach the front panel assembly toward the front. 1. 2. 3. 4. Removing the front

24、 panel assembly (See Fig.2, 3) Fig.1 Fig.2 Fig.3 Fig.4 A 2 A 2 B Top cover C Power supply board Audio board CN402 Main board Tie band D E FEF F Cord stopper C Front panel assembly Front panel assembly D Rear panel CN201 EEEE E CN403 RX-7022RSL/RX-7020RBK 1-4 Prior to performing the following procedu

25、re, remove the top cover and the rear panel. Cut off the tie band fixing the harness. Disconnect the DSP board from connector CN481 on the audio board. Disconnect the audio input board, DVD board Video board and the S video board from connector CN421, CN431, CN441 and CN461 on the audio board. Disco

26、nnect the tuner board from connector CN411 on the audio board. 1. 2. 3. 4. Removing each board connected to the rear side of the audio board (See Fig.5 to 9) Fig.5 Fig.6 Fig.7 Fig.8 CN411 Tie band DSP board DVD board Video board Tuner board Audio input board DSP board CN481 CN441CN431CN421 CN481 CN4

27、21 CN431 CN441 CN411 Tie band CN421 CN431 CN441 Audio input board DVD board Video board Tuner board Audio board CN461 S Video board CN461 S Video board Fig.9 Tie band RX-7022RSL/RX-7020RBK 1-5 Prior to performing the following procedure, remove the top cover and the rear panel. Removing the audio bo

28、ard (See Fig.10) Disconnect the card wire from connector CN402 CN403 on the audio board. Disconnect the relay board from the audio board and the power supply board. (CN291, CN491) Disconnect the harness from connector CN471, CN472, CN473. Remove the three screws G attaching the audio board assembly.

29、 Remove the screw H attaching the audio board assembly. 1. 2. 3. 4. 5. Removing the heat sink (See Fig.12 to 14) Prior to performing the following procedure, remove the top cover, the rear panel and audio board. Disconnect the harness from connector CN241 and CN203 on the power supply board respecti

30、vely. Disconnect the harness from connector CN251 on the power transformer board . Remove the four screws I and the two screws J attaching the main board. 1. 2. 3. Removing the main board (See Fig.11) Prior to performing the following procedure, remove the top cover and main board. Remove the two sc

31、rews K attaching the heat sink to the reverse side of main board. Disconnect the for connectors with each amp. board, and remove the main board. Remove the four screws M and ten screws L attaching the heat sink. 1. 2. 3. Fig.10 Fig.13 Fig.11 Fig.12 power supply board Power / Fuse board Relay board C

32、N473 Audio board Main board rear side Main board Heat sink CN291 CN203 CN491H G CN471 CN402 CN472 Power transformer G G CN241I I I I J J LL KK M M CN251 L Fig.14 Main board Rear Rch amp. board Front Lch amp. board Front Rch amp. board Center amp. board Rear Lch amp. board Heat sink CN802 CN801 CN302

33、 CN301 CN901 CN403 RX-7022RSL/RX-7020RBK 1-6 Prior to performing the following procedure, remove the top cover and the rear panel. Remove the screw O attaching the power / fuse board. Unsolder the solder points the power cord and other harnesses connected to the power / fuse board. 1. 2. Removing th

34、e power / fuse board (See Fig.15) Prior to performing the following procedures, remove the top cover. Cut off the tie band fixing the harness. Unsolder the solder points the two harnesses connected to the power transformer. Unsolder the solder points the harness connected to the FW201 on the power t

35、ransformer board. Remove the four screws N attaching the power transformer. 1. 2. 3. 4. Removing the power transformer (See Fig.15) Prior to performing the following procedure, remove the top cover and the front panel. Remove the one nut attaching the headphone jack of the power supply board on the

36、front side of the body. Disconnect the harness connected to connector CN241, CN201, CN203, and CN291 on the power supply board (If necessary, cut off the band fixing the harness on the side of the base chassis). Remove the three screws P attaching the power supply board and pull out the power supply

37、 board from the front bracket backward. Unsolder the solder points the three harnesses connected to the power supply board. 1. 2. 3. 4. Removing the power supply board (See Fig.16, 17) Fig.15 Fig.16 Fig.17 Power supply board Power transformer N CN241 Solder points (from the power / fuse board) N Sol

38、der points O Power / Fuse board Power cord Power supply board Nut Headphone jack Headphone jack Tie band Solder points P P P Solder points CN201 CN291 bracket Power transformer board FW201 CN203 Solder points RX-7022RSL/RX-7020RBK 1-7 Prior to performing the following procedure, remove the top cover

39、 and the front panel assembly. Pull out the volume knob on the front side of the front panel and remove the nut attaching the system control board. Remove the two screws Q attaching the power switch board. Disconnect the harness from connector CN714 on the power switch board. Remove the six screws R

40、 attaching the system control board on the back of the front panel. On the back of the front panel, release the six joints by pushing the joint tabs inward. Remove the operation switch panel toward the front. Release the two hook attaching the system control board. 1. 2. 3. 4. 5. 6. Removing the sys

41、tem control board / power switch board (See Fig.18 to 20) Fig.18 Fig.19 Fig.20 Front panel assembly Nut Volume knob System control board Power switch board R R CN714 Q Joint Joint JointJointJointJoint Hook Hook Operation switch panel RX-7022RSL/RX-7020RBK 1-8 Adjustment method 1.Tuner range FM 87.5M

42、Hz108.0MHz AM (MW) 522kHz1629kHz (LW) 144kHz 288kHz Tuner section Power amplifier section TP302(Rch) VR301 (Lch) VR302 (Rch) Heat sink Adjustment of idling current Measurement location TP301(Lch) , TP302(Rch) Adjustment part VR301(Lch) , VR302(Rch) Attention This adjustment does not obtain a correct

43、 adjustment value immediately after the amplifier is used (state that an internal temperature has risen). Please adjust immediately after using the amplifier after turning off the power supply of the amplifier and falling an internal temperature. * It is not abnormal though the idling current might

44、not become 0mA even if it is finished to turn variable resistance (VR301,VR302) in the direction of counterclockwise. TP301(Lch) 1. Set the volume control to minimum during this adjustment. (No signal & No load) 2. Set the surround mode OFF. 3. Turn VR301 and VR302 fully counterclockwise to warm up

45、before adjustment. If the heat sink is already warm from previous use the correct adjustment can not be made. 4. For L-ch, connect a DC voltmeter between TP301s B216 and B217 (Lch) and, connect it between TP302s B218 and B219 (Rch). 5. 30 seconds later after power on, adjust VR301 for L-ch, or VR302

46、 for R-ch so that the DC voltmeter value has 2.0mV. RX-7022RSL/RX-7020RBK 1-9 TC9162AF (IC423) : Analog switch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VSSGNDVDD 2 3 4 5 6 7 8 9 10 11 12 13 27 26 25 24 23 22 21 20 19 18 17 16 15 114 28 L-S1 L-S2 L-COM1 L-S3 L-S4 L-C

47、OM2 L-S5 L-S6 L-COM3 L-S7 L-COM4 ST R-S1 R-S2 R-COM1 R-S3 R-S4 R-COM2 R-S5 R-S6 R-COM3 R-S7 R-COM4 DATA CK LEVEL SHIFTER LATCH CIRCUIT SHIFT REGISTER LEVEL SHIFTER LATCH CIRCUIT 1. Pin layout 2. Block diaglam 1OUT1 2-IN1 3+IN1 4 8 7 6 5VEE VCC OUT2 -IN2 +IN2 2 1 - +- + BA15218 (IC451) : Ope. amp. 1.

48、 Pin layout / Block diaglam BA15218N (IC403) : Dual ope. amp. 12345678 OUT1 +IN1+IN1 GND +IN2 -IN2OUT2 Vcc 1+ - 2 + - 1. Pin layout / Block diaglam Description of major ICs RX-7022RSL/RX-7020RBK 1-10 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 1.Pin layout AK4527BVQP (IC601) : A/D,D/A converter Top View No. 1