Jvc-NXD-4-A-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2010 Victor Company of Japan, Limited No.MB726 2010/2 COMPACT COMPONENT SYSTEM MB72620102 SERVICE MANUAL NX-D4B,NX-D4E,NX-D4A COPYRIGHT 2010 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free so

2、lder used in the board (material : Sn-Cu, melting point : 230 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 except NX-D4A SP-NXD3SP-NXD3CA-NXD4

5、 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB726) SPECIFICATION NX-D4 for Europe Amplifier section Output Power230 W (115 W + 115 W) at 3 (10% THD) Audio InputAUDIO INStereo mini ( 3.5 mm) 500 mV/47 k (at “AUDIO LVL3”) 250 mV/47 k (at “AUDIO LVL2”) 125 mV/47 k (at “AUDIO LVL1”) Digital Input/OutputOPTICAL DIG

6、ITAL OUTPUT (output only)-21 dBm to -15 dBm (660 nm 30 nm) USB REC/PLAY (input and output) VIDEO OUTColor systemPAL/NTSC (interlaced/progressive) VIDEO (Composite)1 V(p-p)/75 COMPONENT(Y) 1 V(p-p)/75 (PB/PR) 0.7 V(p-p)/75 Speaker impedance3 - 16 Tuner section FM tuning range87.50 MHz - 108.00 MHz AM

7、 (MW) tuning range522 kHz - 1 629 kHz Disc player section Dynamic range80 dB Horizontal resolution500 lines Wow and flutterImmeasurable iPod section Power supplyDC 5 V 500 mA (each iPod dock) USB section USB specificationCompatible with USB 2.0 Full Speed Compatible deviceMass storage class Compatib

8、le systemFAT16, FAT32 Output powerDC 5 V 500 mA General Power requirementsAC 230 V , 50 Hz Power consumption90 W (at operation) 1.00 W or less (at standby) Dimensions (approx.)195 mm 333 mm 313 mm (W H D) Mass (approx.)3.6 kg System Speaker-SP-NXD3 Type3-way 3-speaker Bass Reflex Type (Magnetically-

9、Shielded Type) Speaker unitsTweeter2.0 cm cone 1 Mid Range5.0 cm cone 1 Woofer16.0 cm cone 1 Impedance3 Power handling capacity115 W Frequency range40 Hz - 20 000 Hz Sound pressure level84 dB/Wm Dimensions205 mm 409.5 mm 290.5 mm (W H D) Mass3.6 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB726)1-3 NX-D4 fo

10、r A Amplifier section Output Power230 W (115 W + 115 W) at 3 (10% THD) Audio InputAUDIO INStereo mini ( 3.5 mm) 500 mV/47 k (at “AUDIO LVL3”) 250 mV/47 k (at “AUDIO LVL2”) 125 mV/47 k (at “AUDIO LVL1”) Digital Input/OutputOPTICAL DIGITAL OUTPUT (output only)-21 dBm to -15 dBm (660 nm 30 nm) USB REC/

11、PLAY (input and output) VIDEO OUTColor systemPAL/NTSC (interlaced/progressive) VIDEO (Composite)1 V(p-p)/75 COMPONENT(Y) 1 V(p-p)/75 (PB/PR) 0.7 V(p-p)/75 Speaker impedance3 - 16 Tuner section FM tuning range87.50 MHz - 108.00 MHz AM (MW) tuning range522 kHz - 1 629 kHz Disc player section Dynamic r

12、ange80 dB Horizontal resolution500 lines Wow and flutterImmeasurable iPod section Power supplyDC 5 V 500 mA (each iPod dock) USB section USB specificationCompatible with USB 2.0 Full Speed Compatible deviceMass storage class Compatible systemFAT16, FAT32 Output powerDC 5 V 500 mA General Power requi

13、rementsAC 240 V , 50 Hz Power consumption90 W (at operation) 16 W or less (at standby) 1 W or less (at ECO mode) Dimensions (approx.)195 mm 333 mm 313 mm (W H D) Mass (approx.)3.6 kg System Speaker-SP-NXD3 Type3-way 3-speaker Bass Reflex Type (Magnetically-Shielded Type) Speaker unitsTweeter2.0 cm c

14、one 1 Mid Range5.0 cm cone 1 Woofer16.0 cm cone 1 Impedance3 Power handling capacity115 W Frequency range40 Hz - 20 000 Hz Sound pressure level84 dB/Wm Dimensions205 mm 409.5 mm 290.5 mm (W H D) Mass3.6 kg each RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB726) SECTION 1 PRECAUTION 1.1Safety Precautions (1) Thi

15、s design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the o

16、riginal circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will furt

17、her relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection

18、afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having such features are identified by sh

19、ading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. (4) The leads

20、 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 is required, the original lead routing and dress shoul

21、d be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal cabinet, screw hea

22、ds, headphone jack, control shafts, etc.) to be sure the product is safe to operate 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 current from each e

23、xposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1

24、,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled 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 voltmeter. Move the resistor connection to each expose

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

26、1.2Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance with the relevant safety standards. (4) It is essen

27、tial that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming re

28、pair of this system. 1.4Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for sa

29、fety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0

30、.15 F AC TYPE (No.MB726)1-5 1.5Preventing static electricity Electrostatic 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. 1.5.1

31、 Grounding to prevent damage by static electricity Static 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 workbench Ground the workbench by la

32、ying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain qua

33、lity during transport and before installation, both sides of the laser diode on the replacement optical pickup 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 picku

34、p. The testers internal power source can easily destroy 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, etc. a

35、fter replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break whe

36、n 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 the c

37、ard wire is disconnected from the connector on the servo board. (If the card wire 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 card wire. 1M Conductive material

38、 (conductive sheet) or iron palate (caption) Anti-static wrist strap Solder short land section 1-6 (No.MB726) 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not stare into beam. (Others) Visible and/or

39、invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.CAUTION : This laser product uses visible and/or invisible laser radiation a

40、nd 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 to function. 6.CAUTION : Use of controls

41、, 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 or operation check. WARNING LABEL and

42、PRINT (No.MB726)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. SECTION 3 DISASSEMBLY 3.1Main body (Used figure were NX-D4E) 3.1.1Removing the Top cover (See Fig.1, 2, 3, 4) (1) Remove the six screws A attaching the both Side panel. (S

43、ee Fig.1) Fig.1 (2) Remove the six screws B attaching the both Side panel. (See Fig.2) Fig.2 (3) Disconnect the card wire from iPod board connected to connector CN400 of the Main board. (See Fig.3) (4) Disengage two hooks a engaged both side of the Top cov- er. (See Fig.3) Fig.3 (5) Disconnect the c

44、onnector wire from Main board connected to connector CN401 of the iPod switch board. (See Fig.4) Fig.4 AA B hook a CN400 CN401 1-8 (No.MB726) 3.1.2Removing the Rear panel (See Fig.5, 6) (1) Disconnect the connector wire from FAN connected to con- nector CN303 of the Main board. (See Fig.5) (2) Disco

45、nnect the card wire from Tuner pack connected to connector CN306 of the Main board. (See Fig.5) Fig.5 (3) Remove the six screws C attaching the Rear panel. (See Fig.6) Fig.6 3.1.3Removing the Main board (See Fig.7) (1) Disconnect the card wire from Front panel connected to connectors CN301, CN312 of

46、 the Main board. (2) Disconnect the parallel wire from Front panel connected to connector CN315 of the Main board. (3) Disconnect the card wire from Loader board connected to connector CN307 of the Main board. (4) Disconnect the connector wire from Power board connect- ed to connector CN180 of the M

47、ain board. (5) Disconnect the card wire from DVD mechanism connected to connector CN309 of the Main board. (6) Disconnect the card wire from USB board connected to connector CN502 of the Main board. (7) Disconnect the card wire from DVD board connected to connector CN500 of the Main board. (8) Disco

48、nnect the card wire from Amp board connected to connector CN503 of the Main board. (9) Disconnect the card wire from DVD board connected to connector CN310 of the Main board. (10) Disconnect the parallel wire from Amp board connected to connector CN181 of the Main board. (11) Disconnect the card wir

49、e from the Mic board connected to connector CN304 of the Main board. (12) Remove the two screws D attaching the Main board. Fig.7 CN303 CN306 CC DD CN301 CN312 CN309 CN502 CN500 CN503 CN310 CN181 CN304 CN315 CN307 CN180 (No.MB726)1-9 3.1.4Removing the DVD mechanism (See Fig.8) (1) Disconnect the connector wire from USB board connected to connector CN811 of the DVD board. (2) Remove the two screws E attaching the both side of the DVD mechanism. (3) Disengage two hooks b engaged both side of the DVD mechan