Jvc-NXPB-10-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2010 Victor Company of Japan, LimitedNo.MB7302010/10CD PORTABLE SYSTEMMB730201010SERVICE MANUALNX-PB10B, NX-PB10E, NX-PB10EYCOPYRIGHT 2010 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS

2、1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . 1-85 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8Preliminary1-2 (No.MB730)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier sectionOutput

5、 Power 4 W (2 W + 2 W) at 16 (10% THD)Audio Input AUDIO IN: Stereo mini ( 3.5 mm)250 mV/47 kDigital input USB terminalTunerFM tuning range 87.50 MHz - 108.00 MHzDisc playerDynamic range 80 dBWow and flutter ImmeasurableUSBUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass sto

6、rage classCompatible system FAT16, FAT32Output power DC 5 V 500 mASDCompatible device SD, SDHCCompatible system FAT16, FAT32iPodOutput power DC 5 V 500 mAGeneralSpeaker type Bass-Reflex typeSpeaker unit 8 cm x 2Speaker impedance 16 Power requirements AC 230 V / 50 HzPower consumption 25 W (at operat

7、ion)1.00 W or less (on standby)Dimensions (approx.) 400 mm 215 mm 91 mm (W H D)Mass (approx.) 2.3 kg(No.MB730)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

8、, 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 the design or circuitry of the product shouldnot

9、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 therefrom.(3) Many electrical and mechanical parts in th

10、e 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-age, etc. Replacement parts which have these speci

11、alsafety 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 which does not have the same safety charac-teristi

12、cs 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 parts, high temperature parts, moving parts and/orsh

13、arp 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 hazard testingAfter reassembling the product, always

14、 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 a line isolation transformer during this check. Pl

15、ug 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 ground. Any leakage cur-rent must not exceed 0.5mA

16、 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 an ex-posed metal part and a known good earth groun

17、d.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, reverse the plug in the AC outlet andrepeat each meas

18、urement. 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 repairer to ensure thatthese safety standards are m

19、aintained.(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 CautionBurrs formed during molding may be left over on so

20、me 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 parts that areprinted over with black such as the

21、 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 version)Good earth groundPlace this probe on each e

22、xposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB730)1.5 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse

23、 unit (optical pickup). Take care to prevent this when performing 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 re

24、pairs 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 yourselfUse an anti-static wrist strap to release any static electricity built

25、 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 shorted parts to their original condition. (Refer to the text.) Do not us

26、e a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.6 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.

27、(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 unit. Be careful not to take too long atime when attaching it to the

28、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.1.7 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text fo

29、r the pickup unit. Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wireis disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the shor

30、t land sections after connecting the card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapsolder short(No.MB730)1-51.8 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. D

31、o 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 and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product uses

32、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 dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able

33、to 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 and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment

34、or operationcheck. WARNING LABEL and PRINT1-6 (No.MB730)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body (Used model: NX-PB10E)3.1.1 Removing the Rear cover (See Fig.1, 2, 3)(1) Remove the three screws A, thre

35、e screws B and twoscrews C attaching the Rear cabinet. (See Fig.1)Fig.1(2) Disconnect the antenna wire from post pin FM1 of the Mainboard. (See Fig.2)Fig.2(3) Disconnect the connector wire from Trans board connect-ed to connector CN402 of the Main board. (See Fig.3)Fig.33.1.2 Removing the Main board

36、 (See Fig.4)(1) Disconnect the card wire from iPod board connected toconnector CN103 of the Main board.(2) Disconnect the card wire from Key board connected to con-nector CN701 of the Main board.(3) Disconnect the connector wire from Left speaker connect-ed to connector J2 of the Main board.(4) Disc

37、onnect the connector wire from Right speaker con-nected to connector J3 of the Main board.(5) Disconnect the connector wire from Door switch board con-nected to connector CN405 of the Main board.(6) Disconnect the connector wires from USB board connect-ed to connectors J13, CN603 and CN306 off the M

38、ainboard.(7) Disconnect the card wire from USB board connected toconnector CN607 of the Main board.(8) Disconnect the connector wire from Door motor connectedto connector CN404 of the Main board.(9) Disconnect the connector wire from CD mechanism con-nected to connector CN902 of the Main board.(10)

39、Disconnect the flexible wire from CD pickup connected toconnector CN901 of the Main board.(11) Remove the six screws D attaching the Main board.Fig.4BC CAAABBFM1CN402DDDD DDCN405 J2 J3CN306 CN902 CN103CN404J13 CN607CN701CN603 CN901(No.MB730)1-73.1.3 Removing the Key board (See Fig.5)(1) Remove the n

40、ine screws E attaching the Key board.Fig.53.1.4 Removing the USB board (See Fig.6)(1) Remove the three screws F attaching the USB board.(2) Remove the two screws G and one screw H attaching theDoor switches.Fig.63.1.5 Removing the iPod boar (See Fig.7)(1) Remove the two screws J attaching the holder

41、.(2) Disengage the shaft of iPod bracket from Front cabinet.Fig.73.1.6 Removing the Door motor (See Fig.8)(1) Remove the three screws K attaching the Door motor.Fig.83.1.7 Removing the CD mechanism (See Fig.9)(1) Remove the three screws L attaching the CD mechanism.Fig.93.1.8 Removing the Trans boar

42、d (See Fig.10)(1) Disconnect the power cord from connector CN1103 of theTrans board.(2) Disconnect the connector wires from Power transformerconnected to connector CN1101 and CN1104 of the Transboard.(3) Remove the three screws M attaching the Trans board.Fig.10EGFHJshaftKLMMCN1103 CN1104 CN11011-8

43、(No.MB730)SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.SECTION 5TROUBLESHOOTINGThis service manual does not describe TROUBLESHOOTING.1-9 (No.MB730)(No.MB730)VSEPrinted in JapanVictor Company of Japan, LimitedPersonal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan