Jvc-UXH-33-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.No.220442003/03UX-H33MICRO COMPONENT SYSTEM22044200303UX-H33TABLE OF CONTENTS1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Disassembly

2、 method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . 1-184 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24MICRO COMPONENT SYSTEMArea SuffixB - U.K.E - Continental EuropeEN - Northern EuropeUX-H331-2 (No.22044)SECTION 1Important Safety Precauti

4、ons1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For continued protection, no changes should be made to theoriginal design unless authorized in writing by the man-ufacturer. Replacement parts must be iden

5、tical to thoseused 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 alterations or additions will voidthe manufacturers

6、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 often not evident from visual inspection nor ca

7、n theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these special safetycharacteristics are identified in the Parts List of Service Manu-al. Electrical components having such features are iden

8、-tified by shading on the schematics and by ( ) on theParts List in the Service Manual. The use of a substitute re-placement which does not have the same safety character-istics as the recommended replacement parts shown in theParts List of Service Manual may create shock, fire, or oth-er hazards.(4

9、) 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 required, the original lead routingand dress

10、 should be observed, and it should be confirmedthat they have been returned to normal, after reassembling.(5) Leakage shock hazard testing)After reassembling the product, always perform an isolationcheck on the exposed metal parts of the product (antennaterminals, knobs, metal cabinet, screw heads,

11、headphonejack, control shafts, etc.) to be sure the product is safe tooperate 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 leakage currentfrom each exposed

12、 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. Use an ACvoltmeter having, 1,000 ohms p

13、er volt or more sensitivity inthe following manner. Connect a 1,500 ohm 10W resistorparalleled by a 0.15 F AC-type capacitor between anexposed 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 metal

14、part,particularly any exposed metal part having a return path tothe chassis, and measure the AC voltage across the resistor.Now, reverse the plug in the AC outlet and repeat eachmeasurement. Voltage measured any must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2 Warning(1

15、) 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) It is essential that safety cr

16、itical components are replacedby approved parts.(5) If 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 C

17、ritical 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 safety. When replacing them,

18、 be sure to use the parts of the same typeand rating as specified by the manufacturer. (Except the JC version)UX-H33(No.22044)1-31.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-tinued p

19、rotection, 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 will void the manufacturers guarantee; furthermore the manufa

20、cturer 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 parts other than those listed in the manual. Please note howev

21、er 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 safety characteristics as the recommended replacement partss

22、hown 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 parts, moving parts and/or sharp edges for the prevention

23、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.1.5.1 Warning(1) Service should be performed by qualified personnel only.(2) This equipment has be

24、en 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 standards.(5) It is essential that safety critical components ar

25、e 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 repair of this system.UX-H331-4 (No.22044)1.6 Preventing

26、 static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.6.1 Grounding to prevent damage by static elec

27、tricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive material (such as a conductive sh

28、eet) 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 transport and before installation, both

29、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 internal power source can easilydestro

30、y the laser diode. 1.7 Handling 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 optical pickup. For specific detail

31、s, refer to the replace-ment procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a timewhen attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) It is not possible to

32、 adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.8 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the CD pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connector CN1

33、01 on the CD servo board. (If the flexible wire is disconnected without applying solder, the CD 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.CN601 onmechanismboardShorting roundShorting round

34、Flexible wireUX-H33(No.22044)1-51.9 Important for laser products (1) CLASS 1 LASER PRODUCT(2) DANGER : Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam.(3) CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser

35、Unit. Replace thecomplete Laser Unit if it malfunctions.(4) CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches which prevent emission of radiation when the drawer is open andthe safety interlocks have failed or are de feated. It is dangerous to defea

36、t the safety switches.(5) CAUTION : If safety switches malfunction, the laser is ableto function.(6) CAUTION : Use of controls, adjustments or performance ofprocedures other than those specified herein may result inhazardous radiation exposure.CAUTIONPlease use enough caution not to see the beam dir

37、ectlyor touch it in case of anadjustment or operation check.VARNINGOsynlig laserstrlning r denna del r ppnad och sprren rurkopplad. Betrakta ej strlen.VAROAvattaessa ja suojalukitus ohitettaessa olet alttiina nkymt-tmlle lasersteilylle. l katso steeseen.ADVARSELUsynlig laserstrling ved bning, nr sik

38、kerhedsafbrydere erude af funktion. Undg udsasttelse for strling.ADVARSELUsynlig laserstrling ved pning, nr sikkerhetsbryteren er avs-lott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSCaution labelUX-H331-6 (No.22044)SECTION 2Disassembly method2.1 Main body2.1.1 Removing the rear

39、panel(See Fig.1,2)(1) From behind the body, remove the eight screws A attach-ing the rear panel.(2) Turing the body upside down, remove the two screws B at-taching the rear panel, and remove.Fig.1Fig.2AAAABBCCFront panel assemblyRear panelUX-H33(No.22044)1-72.1.2 Removning the side panel (L) and (R)

40、(See Fig.25) Prior to performing the following procedure, remove the rearpanel.(1) Turning the body upside down, remove the two screws Cattaching the front panel assembly.(2) Turning the body initial position, open the CD door whilepressing the upper OPEN button.(3) Moving the side panel (L) in the

41、arrow direction, remove thepanel from the left side of the body.(4) Moving the side panel (R) in the arrow direction, removethe panel from the right side of the body.Fig.3Fig.4Fig.5Side panel (L)Side panel (R)UX-H331-8 (No.22044)2.1.3 Removing the CD player assembly(See Fig.6,7) Prior to performing

42、the following procedure, remove the rearpanel and the left and right side panels.(1) Disconnect the card wires from the two connectors CN603and CN604 on the CD servo control board.(2) Remove the two screws D attaching the front panel assem-bly on the both sides.(3) Release the two joints a on the bo

43、th sides of the front panelassembly.(4) Move the CD player assembly in the direction of the arrow.Fig.6Fig.7CD player assembly CD servo control boardCN604DaCN603DCD player assemblyaUX-H33(No.22044)1-92.1.4 Removing the power amplifier board and heat sink(See Fig.810) Prior to performing the followin

44、g procedure, remove the rearpanel, the left and right side panels, and the CD player assem-bly.(1) Remove the five screws E and F attaching the heat sink.(2) Disconnect the wire from connector CN901 on the powersupply board.(3) Disconnect the card wire from connector CN305 on thepower amplifier boar

45、d.(4) Remove the screw G attaching the power amplifier board.(5) Disconnect the connector CN301 on the power amplifierboard, and release the two joints b.REFERENCE:Remove the screw F, then power amplifier board can be re-moved without removing heat sink.Fig.8Fig.9Fig.10EEFHeat sinkPower amplifier bo

46、ardCN301Power supply boardCN901 CN305Power amplifier boardGbbUX-H331-10 (No.22044)2.1.5 Removing the tuner board(See Fig.11) Prior to performing the following procedure, remove the rearpanel, the left and right side panels, and the CD player assem-bly.(1) Remove the screw H attaching the tuner board

47、 from theright side of the body.(2) Disconnect the card wire from the connector CN1 on thetuner board.(3) Release the joint c, and remove the tuner board backward.Fig.112.1.6 Removing the front panel assembly(See Fig.12,13) Prior to performing the following procedure, remove the rearpanel the left a

48、nd right side panels, the CD player assembly,the power amplifier board.(1) Disconnect the card wire from the connector CN714 on theLCD system CPU board.(2) Release the joint d on the bottom of the front panel assem-bly using a screwdriver, and remove the front panel assem-bly toward the front.Fig.12Fig.13HTuner boardCN1cLCD system CPU boardCN714dFront panel assembly