Jvc-RXF-31-S-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4492005/7HOME CINEMA CONTROL CENTERMB44920057RX-F31SLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-155 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15Area suffixA - AustraliaUS - SingaporeUF - ChinaUJ - U.S.Military1-2 (No.MB449)SPECIFICATION*1: Measured on AC 110 V, 127 V, 220 V, and 240 V.*2: Corresponding to Linear PCM, Dolby Digital, and DTS (with

5、 sampling frequency -32 kHz, 44.1 kHz, 48 kHz).Designs and specifications are subject to change without notice.Amplifier Output Power At stereo operation Front channels 100 W*1 per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total har-monic distortion.At surround operation Front

6、channels 100 W*1 per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic distortion.Center channel 100 W*1, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distor-tion.Surround channels 100 W*1 per channel, min. RMS, driven into 6 at 1 kHz with no

7、more than 0.8% total harmonic distortion.Surround back channel 100 W*1, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distor-tion.Audio Audio Input Sensitivity/ImpedanceDVR/DVD (DVD MULTI), VCR, DBS, TV 330 mV/47 kAudio Input(DIGITAL IN)*2Coaxial: DIGITAL IN 1(DVR/DVD) 0.5

8、V(p-p)/75 Optical: DIGITAL IN 2(DBS), 3(VCR) -21 dBm to -15 dBm (660 nm 30 nm)Audio Output Level DVR, VCR, MONITOR OUT 330 mVSignal-to-Noise Ratio (66 IHF/DIN) 80 dB/62 dBFrequency Response (8 ) 20 Hz to 20 kHz (1 dB)Bass Boost +4 dB 1 dB at 100 HzEqualization(at DSP operation)Center frequency 63 Hz

9、, 250 Hz, 1 kHz, 4 kHz, 16 kHzControl range 8 dBVideo Video Input Sensitivity/ImpedanceComposite video: DVR/DVD, VCR, DBS 1 V(p-p)/75 S-video: DVR/DVD, VCR, DBS Y (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.286 V(p-p)/75 Component: DVR/DVD, VCR Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75

10、 Video Output Level/ImpedanceComposite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONITOR OUT Y (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.286 V(p-p)/75 Component: MONITOR OUT Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Synchronization NegativeFM tuner (IHF) Tuning Rang

11、e 87.50 MHz to 108.00 MHzUsable Sensitivity Monaural 12.8 dBf (1.2 V/75 )50 dB Quieting Sensitivity Monaural 16.0 dBf (1.7 V/75 )Stereo 37.5 dBf (20.5 V/75 )Stereo Separation at OUT(REC) 35 dB at 1 kHzAM tuner Tuning Range 531 kHz to 1 710 kHz (at 9 kHz intervals)530 kHz to 1 710 kHz (at 10 kHz inte

12、rvals)General Power Requirements AC 110 V/127 V/220 V/230 V - 240 V , adjust-able with the voltage selector, 50 Hz/60 HzPower Consumption 120 W (at operation)5 W (in standby mode)Dimensions (W H D) 435 mm 70 mm 317.2 mmMass 6.3 kg(No.MB449)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design

13、of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circui

14、ts. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanu

15、facture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessar

16、ily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by

17、 ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dres

18、sed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmed

19、that they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter 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

20、sure the productis safe to operate without danger of electrical shock.Do notuse 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 currentfrom each exposed metal parts of the cabinet, particular-ly a

21、ny exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manne

22、r. Connect a 1,500 10W resistorparalleled by 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 ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a re

23、turnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured t

24、omeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) I

25、f mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component part

26、s appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating

27、as specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB449)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual doe

28、s not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB449)1-5SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover (See Figs.1 and 2)(1) From the both sides of the main body, remove the fourscrews A attaching the top cover. (See Fig.1)(2) From the back side of the main body, remove the

29、fivescrews B attaching the top cover. (See Fig.2)(3) Remove the top cover in the direction of the arrow. (SeeFig.1.)Fig.1Fig.2ATop coverBBTop coverB1-6 (No.MB449)3.1.2 Removing the front panel assembly (See Figs.3 and 4) Remove the top cover.(1) From the top side of the main body, remove the tie ban

30、dsbundling the wires. (See Fig.3.)Reference:After reassembling, bundle the wires with the new tiebands as before. (See Fig.3.)(2) Disconnect the parallel wire from the connector CN412 onthe regulator connect board. (See Fig.3)(3) Disconnect the wire from the connector CN451 on the inputmother board.

31、 (See Fig.3)(4) Remove the four screws C and screw C attaching the frontpanel assembly. (See Fig.3)Reference:When attaching the screw C, attach the earth wires withit as before. (See Fig.3.)(5) From the bottom side of the main body, remove the fourscrews C attaching the front panel assembly. (See Fi

32、g.4)(6) From the both and bottom sides of the main body, releasethe joints (a, b) and remove the front panel assembly in thedirection of the arrow. (See Figs.3 and 4)Fig.3Fig.43.1.3 Removing the rear panel (See Fig.5) Remove the top cover.(1) From the back side of the main body, remove the strain re

33、-lief from the rear panel in the direction of the arrow and re-move the power cord.(2) Remove the twenty-nine screws D attaching the rear panel.Fig.5C C CFront panel assemblyCRegulator connect boardTie bandsEarth wiresCN451CN412Input mother boardaaCCFront panel assemblybStrain reliefDRear panelPower

34、 cordDD(No.MB449)1-73.1.4 Removing the tuner (See Fig.6) Remove the top cover.(1) From the top side of the main body, disconnect the cardwire from the connector CN1 on the tuner.(2) From the back side of the main body, remove the twoscrews E attaching the tuner to the rear panel and take outthe tune

35、r.3.1.5 Removing the DSP board (See Fig.6) Remove the top cover.(1) From the back side of the main body, remove the fivescrews E attaching the DSP board to the rear panel.(2) From the top side of the main body, disconnect the DSPboard from the vol IC board while releasing the claw c ofthe connector

36、CN601 on the DSP board.Note:When releasing the claw c, take care not to break it.(3) Take out the DSP board and disconnect the card wire fromthe connector CN602 on the forward side of the DSPboard.Reference:When attaching the DSP board, align the section d of thespeaker relay board in hole on the DS

37、P board.Fig.63.1.6 Removing the master clock board (See Fig.7) Remove the top cover.(1) From the top side of the main body, remove the screw F.Reference:When attaching the screw F, attach the holder with it asbefore.(2) Disconnect the connector CN771 on the master clockboard from the main amplifier

38、board in an upward direction.3.1.7 Removing the gate drive-2 board (See Fig.7) Remove the top cover.From the top side of the main body, disconnect the connectorCN311 on the gate drive-2 board from the main amplifier boardin an upward direction.3.1.8 Removing the S.S. setup board (See Fig.7) Remove t

39、he top cover.(1) From the top side of the main body, remove the tie band fix-ing the wire.Reference:After reassembling, fix the wire with a new tie band asbefore.(2) Disconnect the wire from the connector CN725 on the S.S.setup board.(3) Disconnect the S.S. setup board from the main amplifierboard w

40、hile releasing the claw e of the connector CN727on the main amplifier board.Note:When releasing the claw e, take care not to break it.Fig.7TunerCN1CN601CN602DSP boardSpeaker relay boarddRear panelERear panelECN601DSP boardVol ICboardcCN771 CN311CN725Gate drive-2 boardS.S. setup boardHolderMain ampli

41、fier boardMaster clock boardTie bandFCN727Speaker terminal boardS.S. setupboarde1-8 (No.MB449)3.1.9 Removing the vol sel board (See Fig.8) Remove the top cover.(1) Remove the strain relief from the rear panel in the directionof the arrow.(2) From the back side of the main body, remove the twoscrews

42、G attaching the vol sel board to the rear panel.(3) From the top side of the main body, disconnect the wiresfrom the connectors (CN204, CN205) on the vol sel board.(4) Take out the vol sel board from the main body and removethe wires from the soldered sections f on the reverse sideof the vol sel boa

43、rd.3.1.10 Removing the audio input/output board (See Fig.8) Remove the top cover.(1) From the back side of the main body, remove the twoscrews G attaching the audio input/output board to the rearpanel.(2) Disconnect the audio input/output board from the videoconnect board while releasing the claw g

44、of the connectorCN516 on the audio input/output board.Note:When releasing the claw g, take care not to break it.(3) Disconnect the card wires from the connectors (CN508,CN514) on the forward side of the audio input/outputboard.3.1.11 Removing the primary board (See Fig.8) Remove the top cover.(1) Fr

45、om the top side of the main body, disconnect the powercord from the connector CN203 on the primary board.(2) Disconnect the wires from the connector CN218 on the pri-mary board.(3) Remove the six screws H attaching the primary board onthe chassis base assembly.(4) Take out the primary board from the

46、 main body and removethe wires from the soldered sections h on the reverse sideof the primary board.Fig.83.1.12 Removing the power transformer (See Fig.9) Remove the top cover.(1) From the top side of the main body, remove the tie bandsbundling the wires.Reference:After reassembling, bundle the wire

47、s with the new tiebands as before.(2) Disconnect the wires from the connectors (CN201, CN702)on the main amplifier board.(3) Disconnect the wire from the connector CN202 on the pri-mary board.(4) Remove the four screws J attaching the power transformeron the chassis base assembly.Fig.9Primary boardV

48、ol sel boardCN203Power cordStain reliefHHCN218CN508CN205CN204Audio input/outputboardCN514Chassis base assemblyHhfVideoconnectboardCN516Audio input/outputboardgStrain relief Rear panelG GJJJPower transformerCN201CN702Tie bandsChassis base assemblyMain amplifier boardVol sel boardCN204CN205(No.MB449)1

49、-93.1.13 Removing the fan motor (See Fig.10) Remove the top cover.(1) Form the top side of the main body, remove the tie bandsbundling the wires.Reference:After reassembling, bundle the wires with the new tiebands as before.(2) Disconnect the wire from the connector CN552 on the inputmother board.(3) Remove the two screws K attaching the fan motor assem-bly on the chassis base assembly.(4) Take out the fan motor assemb