Jvc-UXDAB-11-B-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2007 Victor Company of Japan, LimitedNo.MB6332007/8MICRO COMPONENT SYSTEMMB63320078SERVICE MANUALUX-DAB11B, UX-DAB11ENCOPYRIGHT 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)Lead free solder used i

2、n the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-195 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20CA-UXDAB11 SP-UXDAB11SP-UXDAB111-2 (No.MB633)SP

5、ECIFICATIONSpecifications and appearance are subject to change without prior notice.Amplifier section OUTPUT POWER 40 W (20 W + 20 W) at 6 (10% THD)Speakers/Impedance 6 - 16 Audio input LINE IN 500 mV/47 k (at “IN_LVL1”)250 mV/47 k (at “IN_LVL2”)125 mV/47 k (at “IN_LVL3”)Audio output LINE OUT 1.0 Vr

6、ms (47 k) (at “OUT_LVL1”)2.0 Vrms (47 k) (at “OUT_LVL2”)Digital input USB MEMORYTuner section FM Tuning range 87.50 MHz - 108.00 MHzAM (MW) Tuning range 522 kHz - 1 629 kHzDAB tuning range BAND III 174.928 MHz - 239.200 MHzL-BAND 1 452.960 MHz - 1 490.624 MHzCD player section Dynamic range 88 dBSign

7、al-to-noise ratio 85 dBWow and flutter ImmeasurableUSB storage USB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible file system FAT16, FAT32Bus power supply Max. 500 mASpeakers Speaker units Tweeter 1.5 cm dome x 1Woofer 10 cm cone x 1Impedance 6 Dimensi

8、ons (approx.) 145 mm x 251 mm x 175 mm (W x H x D)Mass (approx.) 1.7 kg eachGeneral Power requirements AC 230 V , 50 HzPower supply to USB mass storage class device 5 V/500 mAPower consumption 22 W (Power on)2.3 W (On standby)1.0 W or less (Save Mode)Dimensions (approx.) 175 mm x 251 mm x 247 mm (W

9、x H x D)Mass 2.6 kg(No.MB633)1-3SECTION 1PRECAUTION1.1 Safety 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

10、 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 shouldnot be made. Any design alte

11、rations 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

12、 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 List of Ser-vice Manual. Ele

13、ctrical 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

14、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 firehazard. When service is re

15、quired, 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

16、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 a“Leakage Current Tester“,

17、 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 cord directly into the AC ou

18、tlet. 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 resis

19、tor 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

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

21、s.(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 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre

22、-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 parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are crit

23、icalfor 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 sensitivity)1500 10W

24、0.15 F AC TYPE1-4 (No.MB633)1.5 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 protection, no changes should be made to the original design unless authorized in writing by the manuf

25、acturer. 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 manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Ess

26、ential 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 however that many electrical and mechanical parts inthe product have special safety related characteristic

27、s. 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 partsshown in the Parts List of the Service Manual and may create shock, fire, or other hazards.(4) The lea

28、ds 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 of electric shock and fire hazard. When service isrequired, the original lead routing and dress shoul

29、d 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 been designed and manufactured to meet international safety standards.(3) It is the legal responsibilit

30、y 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 are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local volta

31、ge.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.MB633)1-51.6 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, f

32、abric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.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 la

33、ser products. 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 sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfU

34、se 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 sides of the laser diode on the replacement opticalpickup are shorted. After replacement, return the shor

35、ted 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 easilydestroy the laser diode. 1.7 Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (o

36、ptical 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 details, refer to thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse

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

38、nit is decomposed*Please refer to “Disassembly method“ in the text for the pickup unit. Apply solder to the short land sections before the card wire is disconnected from the connecto on the servo board. (If the card wireis disconnected without applying solder, the pickup may be destroyed by static e

39、lectricity.) In the assembly, be sure to remove solder from the short land sections after connecting the card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapPickup Connector Card wireShort land part p1-6 (No.MB633)1.9 Important for laser products1.CLASS 1

40、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 : Visible and/or invisible laser radiation whenopen

41、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 safety interlocks have failed or are defeated. It is d

42、angerous 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 radiation exposure. REPRODUCTION AND POSITION OF LABELS an

43、d PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. WARNING LABEL and PRINT(No.MB633)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body3.1.1

44、Removing the METAL COVER (See Fig.1, 2)(1) Remove the six screws A attaching the METAL COVER.(See Fig.1)(2) Remove the two screws B attaching the both side of MET-AL COVER. (See Fig.2)Fig.1Fig.2AAB1-8 (No.MB633)3.1.2 Removing the FRONT PANEL assembly (See Fig.3, 4)(1) Remove the two screws C attachi

45、ng the FRONT PANELassembly. (See Fig.3)(2) Disengage one hook a of the bottom side and two hooks bof both side of the FRONT PANEL assembly. (See Fig.3, 4)(3) Disconnect the card wire from FRONT BOARD assemblyconnected to connector CN432 of the MAIN BOARD as-sembly. (See Fig.4)Fig.3Fig.4CChook ahook

46、bCN432(No.MB633)1-93.1.3 Removing the DAB TUNER PACK (See Fig.5, 6)(1) Disconnect the card wire from DAB TUNER PACK con-nected to connector CN372 of the MAIN BOARD assem-bly. (See Fig.5)(2) Remove the one nut D attaching the DAB TUNER PACK.(See Fig.6)3.1.4 Removing the TUNER PACK (See Fig.5, 6)(1) D

47、isconnect the card wire from TUNER PACK connected toconnector CN911 of the MAIN BOARD assembly. (SeeFig.5)(2) Remove the two screws E attaching the TUNER PACK.(See Fig.6)Fig.5Fig.6CN372CN911DE1-10 (No.MB633)3.1.5 Removing the REAR PANEL (See Fig.7, 8)(1) Remove the two screws F attaching the SPEAKER TERMI-NAL. (See Fig.7)(2) Remove the two screws G attaching the POWER BOARDassembly. (See Fig.7)(3) Disengage two hooks c engaged both side of REAR PAN-EL. (See Fig.8)Fig.7Fig.8FGhook c