Jvc-UXG-45-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5332006/6MICRO COMPONENT SYSTEMMB53320066UX-G45B,UX-G45E,UX-G45EN,UX-G45EVLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-145 TROUBLESHOOTING . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15CA-UXG45 SP-UXG45SP-UXG451-2 (No.MB533)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier section Output Power 80 W per channel, min. RMS, driven in

5、to 6 at 1 kHz with no more than 10% total harmonic distortion. (IEC268-3)Speakers/Impedance 6 - 16 Audio Input AUX(Input sensitivity/Impedance)LEVEL1 : 150 mV/47 kLEVEL2 : 500 mV/47 kUSB Ver.1.1Tuner section FM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 522 kHz - 1 629 kHzCD player sect

6、ion Dynamic range 85 dBSignal-to-noise ratio 85 dBWow and flutter ImmeasurableGeneral Power requirement AC 230 V , 50 HzPower consumption 145 W (at operation)20 W (on standby)0.9 W (standby and on Display off)Dimensions (approx.) 175 mm 246 mm 415 mm (W/H/D)Mass (approx.) 6.2 kgSpeakers Type 2-way B

7、ass reflexSpeaker units Woofer 12 cm cone 1Tweeter 4 cm cone 1Impedance 6 Dimensions (approx.) 145 mm 246 mm 212 mm (W/H/D)Mass (approx.) 2.2 kg each(No.MB533)1-3SECTION 1PRECAUTIONS1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specia

8、lly 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 qualified personnel only.(2) Alterations of

9、 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 injury or propertydamage resulting theref

10、rom.(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 components rated for higher voltage, watt-

11、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. The use of a substitutereplacement

12、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 the like to be separated fromlive pa

13、rts, 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, after reassem-bling.(5) Leakage shock ha

14、zard 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 danger of electrical shock.Do notuse

15、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 any exposed metal part having a return path to thechassis, to a known good earth

16、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 a 0.15F AC-type capacitor between a

17、n 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 voltage acrossthe resistor. Now, rev

18、erse 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 tomeet international safety standards.(2) It is the legal responsibility of the r

19、epairer 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 setting for localvoltage.1.3 Caution

20、Burrs 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 parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the

21、 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 dose not Except the J and C v

22、ersion)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.MB533)1.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components specially for saf

23、ety 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 will void the manufacturers gua

24、rantee; 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 parts other than those listed in

25、 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 safety characteristics as the

26、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 parts, moving parts and/or s

27、harp 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.1.5.1 Warning(1) Service should be performed by qualified personnel

28、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 standards.(5) It is essential that

29、 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 repair of this system.(No.

30、MB533)1-51.6 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION :

31、 Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product uses visible and/or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the saf

32、ety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is ableto function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiati

33、on exposure. REPRODUCTION AND POSITION OF LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. WARNING LABEL and PRINT1-6 (No.MB533)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE

34、INSTRUCTIONS.(No.MB533)1-7SECTION 3DISASSEMBLY3.1 Main Body3.1.1 Removing the side panel (See Fig.1, 2)(1) Remove the four screws A attaching the rear cover. (SeeFig.1)(2) Remove the six screws B attaching the side panel . (SeeFig.1)(3) Remove the four screws C attaching the side panel. (SeeFig.2)Fi

35、g.1Fig.2ABBAAECC1-8 (No.MB533)3.1.2 Removing the top cover (See Fig.1, 3)(1) Remove the four screws D attaching the top cover and theside panel. (See Fig.3)(2) Remove the one screw E attaching the top cover. (SeeFig.1)Caution:When take out the top cover, raise slowly, take care not tobreak the two c

36、laws of the front panel.Fig.33.1.3 Removing the power trans board (See Fig.4)(1) Remove the two screws F attaching the power trans board.(2) Disconnect the connector wire from the connector CN103of the main board.(3) Disconnect the connector wires from the connectorsCN901, CN902 of the trans board.F

37、ig.4DDbbFCN901CN902CN103Connector wire a(No.MB533)1-93.1.4 Removing the tuner pack (See Fig.5, 6)(1) Remove the two screws G attaching the tuner pack. (SeeFig.5)(2) Disconnect the card wire from the connector CN351 of themain board. (See Fig.6)3.1.5 Removing the fan (See Fig.5, 6)(1) Remove the four

38、 screws H attaching the fan. (See Fig.5)(2) Disconnect the connector wire from the connector CN141of the main board. (See Fig.6)3.1.6 Removing the main board (See Fig.5, 7)(1) Remove the two screws J attaching the main board. (SeeFig.5)(2) Remove the tow screws K attaching the main board andthe fron

39、t board. (See Fig.7)(3) Disconnect the card wires from the connectors CN401,CN402 of the main board. (See Fig.7)(4) Disconnect the card wire from the connector CN403 of themain board. (See Fig.7)(5) Disconnect the parallel wire from the connector CN502 ofthe main board. (See Fig.7)(6) Disconnect the

40、 connector wires from the connectorsCN101, CN102, CN204, CN361 of the main board. (SeeFig.7)(7) Remove the five screws L attaching the main board. (SeeFig.7)(8) (8) Remove the two screws M attaching the main boardand CD mechanism cover. (See Fig.7)Fig.5Fig.6Fig.7GHHHJJSCN351CN141CN402CN401CN403KCN50

41、2CN102CN101CN204MLLLCN3611-10 (No.MB533)3.1.7 Removing the front panel assembly (See Fig.3, 4, 8, 9)(1) Pull out the tow connector wires a on the bottom chassis.(See Fig.4)(2) Remove the two screws N attaching the front panel. (SeeFig.8)(3) Disconnect the connector wire from the connector CN860of the CD board. (See Fig.9)(4) Disengage the four hooks b are remove the front panel as-sembly. (See Fig.3)Fig.8Fig.9NCN860RBN702BN703RRCN701