JVC-RX7012VSL-avr-sm维修电路原理图.pdf

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1、SERVICE MANUAL AUDIO/VIDEO CONTROL RECEIVER No.21005 Jul. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. RX-7012VSL RX-7012VSL A US UT Australia Singapore Taiwan Area Suffix Contents Safety precautions -1-2 Disassembly method -1-3 Adjustment method -1-8 Description of major ICs -1-921 D I G I T A

2、 L CONTROL + + + 231 564 897/P 0+1010 BASS BOOSTEFFECT MENU ENTER TEST+ REARL SOUND SUB WOOFER + REARR + MUTING CHTV VOL PLAY STOP /REWFF/ VOLUME CA TV/DBS CONTROL TV/VIDEO REC PAUSE PAUSE RETURNFM MODE100+ CONTROL A/V CONTROL RECEIVER CATV/DBSVCRTVAUDIO DSP MODEINPUTON/OFF DVD MUILTIDVDCD TAPE/CDR

3、TREBLE TV/DBSVCRPHONO FM/AM BASS SURROUNDANALOG/DIGIT ALSLEEP + CENTER TUNING + + DVDVCRTV SOUND/DBS ADJUST AUDIO/VIDEO CONTROL RECEIVER SETTING MASTER VOLUME CONTROL DOWNUP CDTAPE/CDR SOURCE NAME BASS BOOST INPUT ANALOG/DIGITAL SPEAKERS ON/OFF DSP MODE PHONES SURROUND ON/OFF FM/AM TUNING STANDBY FM

4、/AM PRESETFM MODE MEMORY INPUT ATT FM/AM D I G I T A L D I G I T A L SURROUND DVD MULTI PHONO SOURCE NAME 12 COMPULINK Remote STANDBY/ON Because the A version of this model has no AV COMPU LINK function, the AV COMPU LINKs logo mark is not attached on the A version model. RadioFans.CN 收音机爱 好者资料库 RX-

5、7012VSL 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 should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to tho

6、se 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. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty

7、and will further relieve the manufacture 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 characteristics are often not evident from visual inspection nor can the p

8、rotection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified b

9、y 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 the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. 4. The lead

10、s 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 sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress shou

11、ld be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage current check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, m

12、etal 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 transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the lea

13、kage 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 leakage 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

14、 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 exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor c

15、onnection to each exposed metal part, particularly 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

16、 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 ensure that these safety standards are maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It

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

18、 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 regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed ov

19、er 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. (Except the J&C version) RadioFans.CN 收音机爱 好者资料库 RX-7012VSL 1-3 Remove t

20、he 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. Disassembly method Removing the top cover (See Fig.1) Prior to performing t

21、he 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 eight screws E attaching the each boards to the rear panel on the back of the body. Remove the four screws F attaching the rear panel on the b

22、ack 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 on the audio board and CN201 on the power supply board in the front panel assembly. Cut off the tie band fixing the harness.

23、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 panel assembly (See Fig.2 and 3) Removing the voltage selector (See Fi

24、g.4) 1. 2. 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 two screws E attaching the rear panel on the back of the body. Fig.1 Fig.2 Fig.3 Fig.4 A 2 A 2 B Top cover C Power su

25、pply board Audio board CN402 Main board Tie band D E E F E F F Cord stopper C Front panel assembly Front panel assembly D Rear panel CN201 F EEE E E RX-7012VSL 1-4 Prior to performing the following procedure, remove the top cover and the rear panel. Cut off the tie band fixing the harness. Disconnec

26、t 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. Disconnect the tuner board from connector CN411 on the audio board. 1. 2. 3. 4. Removing each board c

27、onnected to the rear side of the audio board (See Fig.5 to 8) 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 CN421 CN431 CN441 CN411 Tie band CN421 CN431CN441 Audio input board DVD board Video board Tuner boa

28、rd Audio board CN461 S Video board CN461 S Video board CN461 RX-7012VSL 1-5 Prior to performing the following procedure, remove the top cover and the rear panel. Removing the audio board (See Fig.9) Disconnect the card wire from connector CN402 on the audio board. Disconnect the relay board from the

29、 audio board and the power supply board. (CN291,CN491) Disconnect the harness from connector CN473, CN471, CN472, and CN385. Remove the three screws G attaching the audio board assembly. Remove the screw H attaching the audio board assembly. 1. 2. 3. 4. 5. Remove the ten screws K and four screws L a

30、ttaching the heat sink. Remove the two screws M attaching the heat sink from the rear side of main board. 1. 2. Removing the Heat sink (See Fig.11 to 12) Prior to performing the following procedure, remove the top cover, the rear panel and audio board. Disconnect the harness from connector CN241 and

31、 CN203 on the power supply board respectively. Remove the four screws I and the two screws J attaching the main board. 1. 2. Removing the main board (See Fig.10) Fig.9 Fig.10 Fig.11 Fig.12 power supply board Power / Fuse board Relay board CN473 Audio board Main board rear side Main board Heat sink C

32、N291 CN203 CN491 H G CN471 CN385 CN402 CN472 Power transformer G G CN241I I I I J J L L KKK MM Voltage select board RX-7012VSL 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 power cord and ot

33、her harnesses connected to the power / fuse board. 1. 2. Removing the power / fuse board (See Fig.13 to 14) Prior to performing the following procedures, remove the top cover. Unsolder the two harnesses connected to the power transformer. Disconnect the harness from connector CN251 and unsolder the

34、harnesses connected to FW201 on the power transformer board. Remove the four screws N attaching the power transformer. 1. 2. 3. Removing the power transformer (See Fig.14) Removing the voltage select board (See Fig.13) 1. 2. Prior to performing the following procedures, remove the top cover and the

35、rear panel. Cut off the tie band fixing the harness. Unsolder the six harnesses connected to the power transformer. Fig.13 Fig.14 Power supply board CN251 Power transformer N Solder points N Solder points Solder points O Power / fuse board Power cord Power transformer board FW201 Power transformer S

36、older points Solder points Tie band Power cord Voltage select board Voltage selector Solder points RX-7012VSL 1-7 Prior to performing the following procedure, remove the top cover and the front panel assembly. Pull out the volume knob on the front side of the front panel and remove the nut attaching

37、 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 attaching the system control board on the back of the front panel. On the back of the front panel, release the eight joi

38、nts 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 system control board / power switch board (See Fig.17 to 19) Prior to performing the following procedure, remove the top c

39、over and the front panel. Remove the one nut attaching the headphone jack of the power supply board on the front side of the body. Disconnect the harness connected to connector CN201,CN203,CN241 on the power supply board (If necessary, cut off the band fixing the harness on the side of the base chas

40、sis). Disconnect the relay board to connector CN291 on the power supply board. Remove the three screws P attaching the power supply board and pull out the power supply board from the front bracket backward. Unsolder the three harnesses connected to the power supply board. 1. 2. 3. 4. 5. Removing the

41、 power supply board (See Fig.15 and 16) Fig.17 Fig.18 Fig.19 Front panel assembly Nut MASTER VOLUME knob System control board Power switch board R R CN714 Q Joint Joint JointJointJointJointHook Hook Operation switch panel JointJoint Fig.15 Fig.16 CN241 Power supply boardNut Headphone jack Headphone

42、jack Tie band Solder points P P P Solder points CN201 CN291 Hook CN203 RX-7012VSL 1-8 Adjustment method 1.Set the volume control to minimum during this adjustment.(No signal & No load) 2.Set the surround mode OFF. 2.Turn VR301 and VR302 fully counterclockwise to warm up before adjustment. If the hea

43、t sink is already warm from previous use the correct adjustment can not be made. 3.For L-ch,connect a DC voltmeter between TP301s B216 and B217 (Lch) And,connect it between TP302s B218 and B219(Rch). 4.30 minutes later after power on, adjust VR301 for L-ch, or VR302 for R-ch so that the DC voltmeter

44、 value has 1mV10mV. 1.Tuner range FM 87.5MHz108.0MHz AM(MW) 522kHz1629kHz : (A model) 531kHz1602kHz (9kHz step) : (US,UT model) 530kHz1600kHz (10kHz step) : (US,UT model) Tuner section Power amplifier section TP302(Rch) VR301 (Lch) VR302 (Rch) Heat sink Adjustment of idling current Measurement locat

45、ionTP301(Lch) , TP302(Rch) Adjustment partVR301(Lch) , VR302(Rch) Attention This adjustment does not obtain a correct 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 pow

46、er supply of the amplifier and falling an internal temperature. * It is not abnormal though the idling current might not become 0mA even if it is finished to turn variable resistance (VR301,VR302) in the direction of counterclockwise. TP301(Lch) RX-7012VSL 1-9 DLCKS terminal L L H H DLONterminal L H

47、 L H DLL clock setting SCKI input (DLL circuit OFF) Four times XI clock Three times XI clock Six times XI clock 1 2 3 4 5 6 7 811 12 13 14 15 1618 19 20 21 22 23 24 25 26 27,28 2931 32,33 34 35 36 37 38,39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 5461 62 6370 71 7280 81 8289 90 91 92,93 94 95 96 97

48、 98,99 100 Pin No.SymbolI/OFunction RST MIMD MICS MILP MIDIO MICK MIACK FI03 IRQ VSS LRCKA BCKA SDO02 SD03 LRCKB BCKB SDT0 SDT1 VDD LRCKOA BCKOA TEST0,1 LRCKOB,BCKOB,TXO TEST2,3 RX VSS TSTSUB0 FCONT TSTSUB1,TSTSUB2 PDO VDDA PLON AMPI AMPO CKI VSSA CKO LOCK VSS WR OE CE VDD IO70 VSS AD07 VDD AD816 VSS PO07 VDDDL LPFO DLON,DLCKS SCKO VSSDL SCKI VSSX XO,XI VDDX I I I I I/O I O I I - I I O - I I I I - O O I - I I - I O I O - I I O I - O O - O O O - I/O - O - O - O - O I - - I - I/O - Reset signal input ter