JVC-UXQD9S-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB3382004/12MICRO COMPONENT SYSTEMMB338200412UX-QD9STABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIF

2、IC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTM

3、ENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-285TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

4、2(CA-UXQD9S)(SP-UXQD9S)(SP-UXQD9S)Area suffixA - AustraliaUS - SingaporeUN - AseanRadioFans.CN 收音机爱 好者资料库1-2 (No.MB338)SPECIFICATIONDVD receiver (CA-UXQD9S)Speaker (SP-UXQD9S)Micro component system (UX-QD9S) U.S. and foreign patents licensed from Dolby Laboratories. Design and specifications are sub

5、ject to change without notice.AmplifierOutput power20 W + 20 W at 4 (10% THD)Input terminalsAnalogAUX1,500 mV/47 k:LEVEL1250 mV/47 k:LEVEL2Output terminalsAnalogSpeaker1, 20 W/4 , Impedance 4 - 16 Headphone (1), 25 mW/32 , Impedance 16 - 1 kDigitalDVD/CD optical input 1-23 dBm to -15 dBm (Optical sq

6、uare terminal)OtherAV COMPU LINK 2 ( 3.5)TunerFrequencyFM87.50 MHz - 108.00 MHzAM531 kHz - 1 710 kHz (9 kHz spacing)530 kHz - 1 710 kHz (10 kHz spacing)DVD playerPlayable discsDVD VIDEO, DVD AUDIO, CD, VCD, SVCD, CD-R/CDRW (CD, VCD, SVCD, MP3/ WMA/JPEG format), DVD-R/ DVD-RW (video format)Cassette d

7、eck Frequency response Normal (type I)60 Hz - 14 000 HzWow and flutter 0.15% (WRMS)GeneralPower requirementAC 240 V , 50/60 Hz (UN,US only)AC 240 V , 50 Hz (A only)Power consumption70 W (at operation) 1.3 W (on standby)Dimensions165 mm (W) 200 mm (H) 355 mm (D)Mass (approx.)4.6 kgSystem3-way bass re

8、flex type, Magnetically shielded typeSpeakersWoofer10 cm 1Midrange4 cm 1Tweeter1.5 cm 1Power handling capacity20 WImpedance4 Frequency range55 Hz - 40 kHzSound pressure level85 dB/WmDimensions140 mm (W) 231 mm (H) 204.5 mm (D)Mass (approx.)2.2 kg (1 unit)GeneralDimensions445 mm (W) 231 mm (H) 355 mm

9、 (D)Mass (approx.)9.0 kgRadioFans.CN 收音机爱 好者资料库(No.MB338)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 unle

10、ss authorized in writing by themanufacturer. 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 shouldn

11、ot be made. Any design alterations 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.

12、 These characteris-tics are often 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 L

13、ist of Ser-vice Manual. Electrical 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 Pa

14、rts 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 the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and fir

15、ehazard. When service is required, 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 part

16、s 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 danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using

17、 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 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 cor

18、d 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 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 AC

19、voltmeter. Move the resistor 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 (

20、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 the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the

21、 relevantsafety standards.(4) 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 b

22、urrs 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 (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the ma

23、rk 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 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 se

24、nsitivity)1500 10W0.15 F AC TYPE1-4 (No.MB338)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 performin

25、g repairs.1.5.1 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 wo

26、rkbench by 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 ma

27、intain quality 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 opti

28、cal pickup. The testers internal 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,

29、 etc. after 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 brea

30、k when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.7Attention 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 th

31、e flexible 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.1MConducti

32、ve material(conductive sheet) or iron palate(caption)Anti-static wrist strapPickupShort land sectionsConnectorCard wire(No.MB338)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.

33、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 when the d

34、rawer 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 re

35、sult 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)VA

36、RO : 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 caut

37、ion 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

38、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 eksponering til

39、 strling. (d)WARNING LABEL1-6 (No.MB338)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB338)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the rear cover (See Figs.1 and 2)(1) From the back side of the main body, remove the el

40、evenscrews A attaching the rear cover. (See Fig.1.)(2) From the bottom side of the main body, remove the threescrews B attaching the rear cover. (See Fig.2.)(3) Remove the rear cover from the main body.Fig.1Fig.2Rear coverAAAARear coverB1-8 (No.MB338)3.1.2Removing the side panels (L)/(R) (See Fig.3)

41、 Remove the rear cover.(1) From the bottom side of the main body, remove the twoscrews C attaching the side panels (L)/(R).(2) Slide the side panels (L)/(R) in the direction of the arrowand remove the side panels (L)/(R).Fig.33.1.3Removing the top cover assembly (See Figs.4 and 5) Remove the rear co

42、ver and side panels(L)/(R).(1) From the left side of the main body, disconnect the cardwires from the connectors (CN703, CN709) on the miconboard. (See Fig.4.)(2) Remove the screw D attaching the top cover assembly.(See Fig.4.)(3) From the right side of the main body, disconnect the cardwire from th

43、e connector CN105 on the main board. (SeeFig.5.)(4) Disconnect the wire from the connector CN108 on the mainboard. (See Fig.5.)Reference:When connecting the wire, pass it through the slot b ofthe main board as before. (See Fig.5.)(5) From the both sides of the main body, remove the twoscrews E and s

44、crew F attaching the top cover assembly.(See Figs.4 and 5.)(6) Release the joints a and remove the top cover assembly.(See Figs.4 and 5.)Fig.4Fig.5Side panel(R)Side panel(R)CCEDMicon boardCN703CN709Top cover assemblyaEMain boardaCN108CN105Top cover assemblybF(No.MB338)1-93.1.4Removing the front pane

45、l assembly (See Figs.6 to 8) Remove the rear cover, side panels(L)/(R) and top cover as-sembly.(1) From the left side of the main body, disconnect the cardwires from the connectors (CN702, CN710) on the miconboard. (See Fig.6.)(2) From the right side of the main body, disconnect the earthwire from t

46、he micon board. (See Fig.7.)(3) From the both sides and bottom sides of the main body, re-lease the joints c and joint d. (See Figs.6 to 8.)(4) Remove the front panel assembly in the direction of the ar-row. (See Figs.6 to 8.)Fig.6Fig.7Fig.8Micon boardCN710CN702Front panel assemblycFront panel assem

47、blyMicon boardEarth wirecdFront panel assembly1-10 (No.MB338)3.1.5Removing the fan motor (See Figs.9 and 10) Remove the rear cover, side panels(L)/(R) and top cover as-sembly.(1) From the back side of the top cover assembly, remove thescrew G attaching the fan motor. (See Fig.9.)Reference:When attac

48、hing the screw G, attach the spacer with it.(See Fig.9.)(2) Take out the fan motor.Reference:When attaching the fan motor, pass the wire through the slote. (See Fig.10.)3.1.6Removing the tuner (See Figs.9 and 10) Remove the rear cover, side panels(L)/(R) and top cover as-sembly.(1) From the back sid

49、e of the top cover assembly, remove thetwo screws H attaching the tuner bracket. (See Fig.9.)(2) From the inside of the top cover assembly, remove thescrew J attaching the tuner bracket. (See Fig.10.)(3) Take out the tuner with the tuner bracket.(4) Remove the tuner from the tuner bracket.3.1.7Remov

50、ing the cassette mechanism assembly (See Fig.10) Remove the rear cover, side panels(L)/(R) and top cover as-sembly.(1) From the inside of the top cover assembly, remove thescrew K, screw L, screws L and screw L” attaching thecassette mechanism assembly.(2) Loosen the screw M attaching the cassette m