JVC-MXJD3-cs-sm 维修电路原理图.pdf

《JVC-MXJD3-cs-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-MXJD3-cs-sm 维修电路原理图.pdf（75页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUALCOPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB1912004/4COMPACT COMPONENT SYSTEMMB19120044MX-JD3TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFI

2、C SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTME

3、NT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-315TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38

4、Area suffixUS - SingaporeUX - Saudi ArabiaUN - AseanUE -TurkeyD I G I T A LRadioFans.CN 收音机爱 好者资料库1-2 (No.MB191)SPECIFICATIONDesign and specifications are subject to change without notice.AmplifierOutput Power100 W per channel, min. RMS, driven into 6 at 1 kHz withno more than 10% total harmonic dis

5、tortion.Audio input sensitivity/Impedance(Measured at 1 kHz, with tape re-cording signal 300 mV)AUX300 mV/47 k MIC 1/23.0 mV/50 k Digital outputOPTICAL DIGITALOUTPUT-21 dBm to -15 dBm (660 nm 30 nm)VIDEO OUTColor systemNTSC/PAL selectableVIDEO(composite)1 V(p-p)/75 S-VIDEOY (luminance):1 V(p-p)/75C

6、(chrominance, burst):0.286 V(p-p)/75COMPONENT (Interlace/Progressive)(Y):1 V(p-p)/75(PB/PR):0.7 V(p-p)/75Speaker Terminals Main speakers:6 - 16 Surround speakers:16 - 32 OthersAV COMPU LINK 2 (3.5)TunerFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range531 kHz - 1 602 kHz (at 9 kHz)530 kHz - 1

7、 600 kHz (at 10 kHz)Disc playerPlayable discDVD VIDEO/DVD AUDIOCD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/Video CD/ Super VideoCD/MP3/ WMA/JPEG format)DVD-R/DVD-RW (recorded in video format)Dynamic range90 dBHorizontal resolution500 linesWow and flutterImmeasurableCassette deck Frequency response N

8、ormal (type I)50 Hz - 14 000 HzWow and flutter0.15 % (WRMS)GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V , (ad-justable with the voltage selector), 50 Hz / 60 HzPower consumption135 W (at operation)17 W (on standby)Dimensions (approx.)265 mm 335 mm 352 mm (W/H/D)Mass (

9、approx.)8.6 kgSpeakersType3-Way 3-Speaker Bass Reflex TypeSpeaker SystemsWoofer15 cm cone 1Mid5 cm cone 1Tweeter2 cm dome 1Power handling capacity100 WImpedance6 Frequency range42 Hz - 37 000 HzSound pressure level83 dB/WmDimensions (approx.)205 mm 337 mm 240 mm (W/H/D)Mass (approx.)3.5 kg eachRadio

10、Fans.CN 收音机爱 好者资料库(No.MB191)1-3SECTION 1PRECAUTION1.1Safety Precautions(1) This design 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 t

11、hemanufacturer. Replacement parts must be identical tothose used in the original circuits. 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 altera

12、tions or additions will voidthe manufacturers warranty and will further relieve themanufacture 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 o

13、ften not evident from visual inspection nor can theprotection afforded by them necessarily 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. Elect

14、rical components having such featuresare identified by shading on the schematics and by ( ) 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 ma

15、y create shock, fire, orother hazards.(4) The leads in the products are routed and dressed 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 requ

16、ired, the original lead routingand dress should be observed, and it should be confirmedthat 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 te

17、rminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be 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 aLeakage Current Tester, mea

18、sure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any 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

19、. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. 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

20、connection to each exposed metalpart, particularly any exposed metal part having a returnpath 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

21、0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet 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)

22、 It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-formi

23、ng repair of this system.1.4Critical parts for safetyIn regard with component parts 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 saf

24、ety. When replacing them, be sure to use the parts of thesame type and rating 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 T

25、YPE1-4 (No.MB191)1.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.1 Grounding to

26、prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive

27、material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transpo

28、rt and before installation, both sides of the laser diode on the replacement opticalpickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers inter

29、nal power source can easilydestroy the laser diode. 1.6Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the opt

30、ical pickup. For specific details, refer to thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long atime when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong fo

31、rce. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.7Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnect

32、ed from the connecto on the servo board. (If the flexiblewire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.1MConductive material(conductive sheet)

33、 or iron palate(caption)Anti-static wrist strapTraverse mechanism assemblyPickupShort land sectionCard wireConnector(No.MB191)1-51.8Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAU

34、TION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the draw

35、er is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may resul

36、t in hazardous radiation exposure.REPRODUCTION AND POSITION OF LABELSCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO

37、: Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)!Please use enough caution

38、 not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rur

39、kopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til st

40、rling. (d)WARNING LABEL1-6 (No.MB191)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB191)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the metal cover (See Figs.1 to 3)(1) From the both sides of the main body, remove the twos

41、crews A attaching the metal cover. (See Figs.1 and 2.)(2) From the back side of the main body, remove the sixscrews B attaching the metal cover. (See Fig.23.)(3) Remove the metal cover from the main body while liftingthe rear section of the metal cover in the direction of the ar-row. (See Figs.1 and

42、 2.)Fig.1Fig.2Fig.3Metal coverAMetal coverAMetal coverBBB1-8 (No.MB191)3.1.2Removing the front panel assembly (See Figs.4 to 7) Prior to performing the following procedures, remove the metalcover.(1) From the right side of the main body, remove the screw Cattaching the earth wires on the reverse sid

43、e of the mainboard. (See Fig.4.)Reference:After attaching the earth wires, fix them with a spacer asbefore. (See Fig.4.) (2) Remove the plastic rivet attaching the main board. (SeeFig.4.)(3) From the inside of the main body, disconnect the card wiresfrom the connectors (CN303, CN860, CN880) on the f

44、or-ward side of the main board. (See Fig.4.)(4) Remove the wire clamp fixing the wires and disconnect thewires from the connector (CN301, CN302) on the forwardside of the main body. (See Fig.5.)Reference:After connecting the wires to the connectors, fix the wireswith the wire clamp as before. (See F

45、ig.5.)(5) From the left side of the main body, disconnect the parallelwire from the connector CN101 on the transformer board.(See Fig.5.)(6) Disconnect the wire from the connector CN119 on thetransformer board. (See Fig.5.)Reference:After connecting the wire, pass the wire through the slotb of the h

46、older board as before. (See Fig.5.)(7) Remove the tie band fixing the wire and disconnect thewire from the connector CN106 on the speaker terminalboard. (See Fig.5.)Reference: After connecting the wire, fix the wire with a new tieband as before. (See Fig.5.) After connecting the wire, pass the wire

47、through theslot b of the holder board as before. (See Fig.5.)(8) From the top side of the main body, remove the screw Dand screw D attach the front panel assembly to the mainbody. (See Fig.6.)Reference:When attaching the screw D, attach the earth wire withit. (See Fig.6.)(9) From the bottom side of

48、the main body, remove the twoscrews E and two screws F attaching the front panel as-sembly. (See Fig.7.)(10) Release the claws a, remove the front panel assembly fromthe main body in the direction of the arrow. (See Fig.7.)Fig.4Fig.5Main boardEarth wiresSpacerCN303CN860Plastic rivetCN880CCN301CN101C

49、N119Tie bandTransformer boardSpeaker terminal boardCN106Parallel wirebCN302wiresWire clampMain boardParallelwireWireHolder board(No.MB191)1-9Fig.6Fig.7Front panel assemblyDDEarth wireFront panel assemblyEEFaa1-10 (No.MB191)3.1.3Removing the tuner (See Figs.8 and 9.) Prior to performing the following

50、 procedures, remove the metalcover.(1) From the top side of the main body, disconnect the cardwire from the connector CN21 on the main board. (SeeFig.8.)(2) From the back side of the main body, remove the twoscrews G attaching the tuner to the rear panel. (See Fig.9.)3.1.4Removing the video board (S