JVC-EXA5-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB3962005/4COMPACT COMPONENT SYSTEMMB39620054EX-A5TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC

2、 SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84ADJUSTMEN

3、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-235TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27A

4、rea suffixB - U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeEE - Russian Federation(SP-EXA5)(CA-EXA5)(SP-EXA5)RadioFans.CN 收音机爱 好者资料库1-2 (No.MB396)SPECIFICATIONCA-EXA5SP-EXA5Designs and Specifications are subject to change without notice.GeneralPower sourceAC 230 V , 50 HzPower co

5、nsumption24 W (in operation)1 W (on standby)Weight3.0 kgExternal dimensions (W H D)232 mm 100 mm 269 mmDVD playerPlayable discsDVD VIDEO, DVD AUDIO, VCD,Super VCD, CD, CD-R/RW (CD,VCD, MP3, JPEG format), DVD-R/RW (video format)Video output Color systemPALHorizontal resolution500 linesSCART connector

6、 1Audio output Analog sound output Speakers 260 W (30W + 30 W) at 4 (10% THD)Output power (IEC 268-3) Fitting impedance: 4 to 16 Headphones 111 mW/32 Fitting impedance16 to 1 kSubwoofer 1500 mVrms/10 kDigital sound outputOptical 1-21 dBm to -15 dBmOther outputAV COMPU LINK 2 (3.5)Audio inputSound in

7、putAUX 1Level 1250 mV/50 kLevel 2500 mV/50 kTunerFM tunerReceiving frequency87.50 MHz to 108.00 MHzAntenna75 - unbalanced typeAM tunerReceiving frequency522 kHz to 1629 kHzAntennaExternal antenna jack (loop antenna)Type2-way bass-reflex type Magnetically shielded typeWoofer10.5 cm wood coneTweeter2

8、cm wood conePower handling capacity100 WImpedance4Crossover frequency3.5 kHzSound pressure level80.5 dB/W mDimension (W H D)143 mm 257 mm 243 mmWeight (1 unit)3.5 kgRadioFans.CN 收音机爱 好者资料库(No.MB396)1-3SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware a

9、ndmany 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 circuits. Services should be per-formed by qualif

10、ied 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 themanufacture of responsibility for personal inju

11、ry 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 necessarily be obtained by us-ing replacement compo

12、nents 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 ( ) onthe Parts List in the Service Manual

13、. 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 dressed with ties,clamps, tubings, barriers and

14、 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 confirmedthat they have been returned to normal, aft

15、er 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 sure the productis safe to operate without

16、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, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to

17、 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 manner. Connect a 1,500 10W resistorparalleled by

18、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 returnpath to the chassis, and measure the AC v

19、oltage 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.). 1.2Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is

20、 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) If mains voltage selector is provided, check se

21、tting 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-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (part

22、s 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 as specified by the manufacturer. (This regulation d

23、ose 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.MB396)1.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and

24、components specially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions wil

25、l void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by part

26、s other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same sa

27、fety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and 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

28、parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1Warning(1) Service should be perfor

29、med by qualified personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety standar

30、ds.(5) It is essential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.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

31、 repair of this system.(No.MB396)1-51.6Preventing 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.

32、1.6.1 Grounding to 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

33、 laying conductive 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 qua

34、lity during transport 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

35、. The testers internal power source can easilydestroy the laser diode. 1.7Handling 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. afte

36、r replacing the optical 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 sub

37、jected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.8Attention 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

38、 wire is disconnected 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 materia

39、l(conductive sheet) or iron palate(caption)Anti-static wrist strapShort land sectionCard wireTraverse mechanism assemblypickup1-6 (No.MB396)1.9Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to

40、 beam.3.CAUTION : 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 wh

41、en the drawer 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 i

42、n may result 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 ejstrle

43、n. (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 strling. (d)!Please use eno

44、ugh caution 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

45、 sprren rurkopplad. 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 ekspone

46、ring til strling. (d)WARNING LABEL(No.MB396)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.MB396)SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover (See Fig.1)(1) From the top side of the main body, remove the fou

47、r screwsA attaching the top cover.Fig.1AAATop cover(No.MB396)1-93.1.2Removing the AL panel L and AL panel R (See Figs.2 to 7.) Remove the top cover.(1) Remove the two screws B, screw C and screw C attachingthe bridge A. (See Fig.2.)Reference:When attaching the screw C attach the lug wire with it.(Se

48、e Fig.2.)(2) Remove the two screws C attaching the bridge B. (SeeFig.2.)(3) Remove the two screws C attaching the bridge C. (SeeFig.2.)(4) From the back side of the main body, remove the threescrews D attaching the bridge C. (See Fig.3.)Reference:When attaching the screws C attach the lug wires with

49、them. (See Fig.2.)(5) From the top side of the main body, remove the two screwsE attaching the AL panel L and AL panel R. (See Fig.4.)(6) From the bottom side of the main body, remove the threescrews F attaching the wood bar. (See Fig.5.)(7) Remove the six screws G and two screws H attaching theAL p

50、anel L and AL panel R. (See Fig.6.)(8) Remove the AL panel L and AL panel R in the direction ofthe arrow 2 while extending the back section of the AL pan-el L and AL panel R in the direction of the arrow 1. (SeeFig.7.)Fig.2Fig.3Fig.4Lug wiresBBridge ACCCCCCBridge BBridge CLug wireDEAL panel RAL pane