JVC-NXT5-cs-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2010 Victor Company of Japan, Limited No.MB744 2010/5 COMPACT COMPONENT SYSTEM MB74420105 SERVICE MANUAL NX-T5B, NX-T5E, NX-T5EN, NX-T5EV, NX-T5EE COPYRIGHT 2010 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Cen

2、tigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

4、 . . . . . . . . . . . . . . . . . . . . . 1-11 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 CA-NXT5SP-NXT5FSP-NXT5FSP-NXT5W RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB744) SPECIFICATION Main unit-CA-NX

5、T5 Input/output HDMI outputHDMI OUT USB terminalUSB MEMORY PLAY Analog audio inputAUDIO IN 500 mV/50 k Digital audio inputDIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm30 nm) Analog video outputVIDEO OUTColor systemPAL Composite video, 1 V(p-p)/75 Tuner FM tuning range87.50 MHz - 108.00 MHz Disc pl

6、ayer Playable discDVD Video/CD/VCD/SVCD CD-R/CD-RW (CD/SVCD/VCD/MP3/JPEG/MPEG-1/MPEG-2/DivX format) DVD-R/-RW (DVD Video/DVDVR/MP3/JPEG/MPEG-1/MPEG-2/DivX format) +R/+RW (DVD Video/MP3/JPEG/MPEG-1/MPEG-2/DivX format) Dynamic range80 dB Horizontal resolution500 lines Wow and flutterImmeasurable USB P

7、layable filesMP3/JPEG/MPEG-1/MPEG-2/DivX format USB specificationCompatible with USB 2.0 Full Speed Compatible deviceMass storage class Compatible systemFAT16, FAT32 Bus power supplyDC 5 V 500 mA HDMI Video resolution576p, 720p, 1080i, 1080p Output power (HDMI OUT)DC 5 V 55 mA General Mass (approx.)

8、2.3 kg Dimensions (approx.)Placed verticallyA: 240 mm B: 420 mm C: 64 mm D: 70 mm E: 134 mm Placed horizontallyF: 420 mm G: 70 mm H: 240 mm Subwoofer-SP-NXT5W Output powerFront100 W (50 W + 50 W) at 6 (10% THD) Subwoofer100 W at 3 (10% THD) SpeakerBass reflex type 16 cm cone x 1 Power handling capac

9、ity100 W Frequency range40 Hz - 150 Hz Sound pressure level77 dB/W m G F H CD E A B RadioFans.CN 收音机爱 好者资料库 (No.MB744)1-3 Design and specifications are subject to change without notice. Power requirementsAC 230 V , 50 Hz Power consumption40 W (at operation of the System) 1.00 W or less (on standby)

10、Mass (approx.)9.2 kg Dimensions (approx.)231 mm 393 mm 370.5 mm (W/H/D) Speakers-SP-NXT5F Speaker1 way bass reflex type 8 cm cone x 1 Impedance6 Power handling capacity50 W Frequency range75 Hz - 20 kHz Sound pressure level82 dB/W m Mass (approx.)0.83 kg each Dimensions (approx.)100 mm 240 mm 128 mm

11、 (W/H/D) 1-4 (No.MB744) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This 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 th

12、e manufacturer. Replacement parts must be identical to those used in the original 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 a

13、lterations or additions will void the manufacturers warranty and will further 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-

14、 tics are often not evident from visual inspection nor can the protection 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- vi

15、ce Manual. Electrical components having such features are identified by shading 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

16、 of Service Manual 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 of electric shock and fire h

17、azard. When service is required, the original lead routing and dress should 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

18、parts of the product (an- tenna terminals, knobs, metal cabinet, screw heads, 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 outle

19、t. Using a Leakage Current Tester, measure the leakage current from each exposed 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 t

20、he AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 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 r

21、esistor with the AC voltmeter. Move the resistor connection to each exposed 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 mu

22、st not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 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

23、 be made in accordance with the relevant safety standards. (4) It is essential 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 chas

24、sis. Therefore, pay attention to such burrs in the case of pre- forming repair 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 ( ),

25、diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. 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 p

26、art. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE (No.MB744)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

27、(optical pickup). Take care to prevent this when performing repairs. 1.5.1 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 repair

28、s are being performed. (1) Ground the workbench Ground the workbench by laying 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

29、 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 optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not u

30、se a tester to check the condition of the laser diode in the optical pickup. 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

31、. (2) Cut off the shorted part of the flexible cable using nippers, etc. after 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

32、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. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap 1-

33、6 (No.MB744) 1.7Important 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 invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CA

34、UTION : 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 and is equipped with safety switches which prevent emission of radiation when the drawer is open a

35、nd 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, adjustments or performance of procedures other than those specified here in may result in hazar

36、dous 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 PRINT (No.MB744)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe

37、 SPECIFIC SERVICE INSTRUCTIONS. SECTION 3 DISASSEMBLY 3.1Main body (Used model: NX-T5E) 3.1.1Removing the DVD door (1) Connect the Main unit and Subwoofer. (2) Power to ON and then open the DVD door. (3) Slide to front side and pull up the DVD door. 3.1.2Removing the Top cabinet (See Fig.1,2, 3, 4)

38、(1) Disconnect the card wire from DVD MPEG board connect- ed to connector CNC1 and CNC5 of the Connect board. (See Fig.1) Fig.1 (2) Remove the four screws A attaching the Top cabinet. (See Fig.2) Fig.2 (3) Remove the three screws B attaching the Top cabinet. (See Fig.3) Fig.3 (4) Disconnect the card

39、 wire from DVD MPEG board connect- ed to connector CON401 of the Display board. (See Fig.4) Fig.4 3.1.3Removing the DVD mechanism (See Fig.5) (1) Remove the four screws C attaching the DVD mechanism. (2) Remove the two screws D attaching the Connect board. Fig.5 CNC5CNC1 A B CON401 CC D 1-8 (No.MB74

40、4) 3.1.4Removing the Display board (See Fig.6) (1) Remove the six screws E attaching the Display board. (2) Disconnect the card wire from Key board connected to con- nector CON402 and CON403 of the Display board. Fig.6 3.1.5Removing the DVD MPEG board (See Fig.7, 8) (1) Remove the two screws F attac

41、hing the DVD MPEG board. (See Fig.7) Fig.7 (2) Disconnect the card wire from DVD MPEG board connect- ed to connector SCON1 of the UPGRADE board. (See Fig.8) (3) Disconnect the connector wire from DVD VCC board con- nected to connector SCON2 of the DVD MPEG board. (See Fig.8) (4) Disconnect the card

42、wire from Main board connected to connector CN702 of the DVD MPEG board. (See Fig.8) (5) Disconnect the connector wire from Main board connected to connector CON101 of the DVD MPEG board. (See Fig.8) (6) Disconnect the connector wire from USB board connected to connector CON703 of the DVD MPEG board

43、. (See Fig.8) Fig.8 3.1.6Removing the USB board (See Fig.9) (1) Disconnect the connector wire from USB board connected to connector CON301 of the Main board. (2) Disconnect the card wire from USB board connected to connector CON201 of the Main board. (3) Remove the two screws G attaching the USB boa

44、rd. Fig.9 3.1.7Removing the Main board (See Fig.10, 11, 12) (1) Remove the two screws H attaching the Main board. (See Fig.10) Fig.10 (2) Remove the three screws J and two screws K attaching the DC motor. (See Fig.11) (3) Disconnect the connector wire from DC motor connected to connector MTCON1 of t

45、he Main board. (See Fig.11) (4) Disconnect he card wire from Tuner pack connected to connector CON603 of the Main board. (See Fig.11) Fig.11 CON403 CON402 E E F SCON1CON703 SCON2CN702CON101 CON301CON201 G H JM M JK CON603 MTCON1 (No.MB744)1-9 (5) Remove the four screws L attaching the bracket. (See

46、Fig.12) Fig.12 (6) Remove the three screws M attaching the Main board. (See Fig.11) 3.2Subwoofer (Used model: SP-NXT5WE) 3.2.1Removing the Power amp unit (See Fig.1, 2, 3) (1) Remove the six screws A attaching the Power amp unit. (See Fig.1) Fig.1 (2) Remove the three screws B attaching the Power am

47、p unit. (See Fig.2) Fig.2 (3) Pull out the Power amp unit for half way; disconnect the connector wire from Subwoofer speaker connected to con- nector CON805 of the Power amp board. (See Fig.3) Fig.3 3.2.2Removing the Power cover and Amp cover (See Fig.4, 5, 6, 7) (1) Remove the five screws C attachi

48、ng the Cover. (See Fig.4) Fig.4 (2) Remove the three screws D attaching the Cover. (See Fig.5) Fig.5 (3) Remove the six screws E attaching the Cover. (See Fig.6) Fig.6 L A A B CN805 C D E 1-10 (No.MB744) (4) Lift up the cover; remove the two screws F attaching the Cover. (See Fig.7) Fig.7 3.2.3Remov

49、ing the Power board (See Fig.8) (1) Disconnect the power cord connected to connector CON01 of the Power board. (2) Disconnect the connector wires from Amp board connect- ed to connectors CON901 and CON902 of the Power board. (3) Remove the eight screws G attaching the Power board. Fig.8 3.2.4Removing the Amp board (See Fig.9, 10) (1) Remove the four screws H attaching the Back plate. (See Fig.9) Fig.9 (2) Remove the four screws J attaching the Amp board. (See Fig.10) Fig.10 F G G G CON902CON901 CON01 H J J (No.MB744)1-11 SECTION 4 ADJ