JVC-UXTB30-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2010 Victor Company of Japan, Limited No.MB725 2010/3 COMPACT COMPONENT SYSTEM MB72520103 SERVICE MANUAL UX-TB30B, UX-TB30E, UX-TB30EN, UX-TB30EV COPYRIGHT 2010 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Cent

2、igrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . 1-10 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 AX-UXTB30 XT-UXTB30 SP-UXTB30SP-UXTB30 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB725) SPECIFICATION Designs &

5、 specifications are subject to change without notice. Amplifier unit (AX-UXTB30) Output Power20 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion. (IEC268-3) Speakers/Impedance6 - 8 Player/tuner unit (XT-UXTB30) Tuner section FM tuning range87.50 MHz - 1

6、08.00 MHz CD player section Measurement Condition2W, IEC-A weighted Dynamic range75 dB Signal-to-noise ratio75 dB Wow and flutterImmeasurable Terminals AUDIO INInput sensitivity/Impedance250 mV/50 k USB MEMORYUSB specificationCompatible with USB 2.0 Full-Speed Compatible deviceMass storage class Com

7、patible systemFAT16, FAT32 Output powerDC 5 V 500 mA General Power requirementAC 230 V , 50 Hz Power consumption50 W (at operation) 1.00 W or less (on standby) Dimensions (approx.)Player/tuner unit230 mm 81 mm 230 mm (W H D) Amplifier unit230 mm 81 mm 243 mm (W H D) Mass (approx.)Player/tuner unit1.

8、70 kg Amplifier unit2.94 kg Speakers (SP-UXTB30) Type2-way Bass reflex Speaker unitsTweeter4 cm cone 1 Woofer10 cm cone 1 Dimensions (approx.)160 mm 250 mm 160 mm (W H D) Mass (approx.)1.81 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB725)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of th

9、is 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 original circui

10、ts. 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 further relieve th

11、e 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 afforded by th

12、em 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 shading on the s

13、chematics 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 in the produc

14、ts 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 should be observed,

15、 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 heads, headphone

16、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 exposed metal p

17、arts 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, 1,000 per volt

18、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 exposed metal part,

19、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.). 1.2Warning (1)

20、 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 essential that safe

21、ty 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 repair of this s

22、ystem. 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 safety. When rep

23、lacing 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 0.15 F AC TYPE

24、RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB725) 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 rep

25、airs. 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 repairs are being performed. (1) Ground the workbench Ground the work

26、bench 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 up in your body. (3) Handling the optical pickup In order to m

27、aintain 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 use a tester to check the condition of the laser diode in the op

28、tical 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. (2) Cut off the shorted part of the flexible cable using nipp

29、ers, 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 the connector. (3) Handle the flexible cable carefully as it ma

30、y 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 (No.MB725)1-5 1.7Important for laser products 1.CLASS 1 LASER PRO

31、DUCT 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.CAUTION : Visible and/or invisible laser radiation when open and i

32、nter 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 and the safety interlocks have failed or are defeated. It is dang

33、erous 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 hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and

34、 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 1-6 (No.MB725) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. SECTION 3 DISASSEMBLY 3.1Amplif

35、ier unit (Used model is UX-TB30E) 3.1.1Removing the Top cover (See Fig.1, 2) (1) Tear off the Rubber foots. (See Fig.1) (2) Remove the four screws A attaching the Top cover. (See Fig.1) Fig.1 (3) Remove the five screws B and two screws C attaching the Rear cover. (See Fig.2) Fig.2 3.1.2Removing the

36、Main board (See Fig.3, 4) (1) Disconnect the card wire from Display board connected to connector CN303 of the Main board. (See Fig.3) (2) Disconnect the connector wires from Display board con- nected to connectors CN302 and CN305 of the Main board. (See Fig.3) (3) Disconnect the connector wires from

37、 Power transformer connected to connectors CN1101 and CN1104 of the Main board. (See Fig.3) (4) Disconnect the connector wire from Rectifier board con- nected to connector CN402 of the Main board. (See Fig.3) (5) Remove the three screws D attaching the Main board. (See Fig.3) Fig.3 AA Rubber foot B

38、C D D CN303CN302 CN305 CN402 CN1101 CN1104 (No.MB725)1-7 (6) Remove the three screws E attaching the Heat sink. (See Fig.4) Fig.4 3.1.3Removing the Rectifier board (See Fig.5) (1) Disconnect the connector wire from Power transformer connected to connector CN1102 of the Rectifier board. (2) Remove th

39、e four screws F attaching the Rectifier board. Fig.5 3.1.4Removing the Front panel (See Fig.6, 7) (1) Remove the two screws G attaching the Front panel. (See Fig.6) Fig.6 (2) Disengage two hooks a engaged both side of the Front panel. (See Fig.7) Fig.7 3.1.5Removing the Display board (See Fig.8) (1)

40、 Remove the five screws H attaching the Display board. (2) Disconnect the connector wire from Volume board con- nected to connector CN702 of the Display board. Fig.8 3.1.6Removing the Rectifier board (See Fig.9) (1) Remove the Volume knob. (2) Remove the two screws J attaching the Volume board. Fig.

41、9 E F F CN1102 G hook a CN702 H H J J 1-8 (No.MB725) 3.2CD unit (Used model is UX-TB30E) 3.2.1Removing the Top cover (See Fig.1, 2) (1) Tear off the Rubber foots. (See Fig.1) (2) Remove the four screws A attaching the Top cover. (See Fig.1) Fig.1 (3) Remove the five screws B and two screws C attachi

42、ng the Rear cover. (See Fig.2) Fig.2 3.2.2Removing the Front panel (See Fig.3, 4, 5) (1) Disconnect the connector wire from USB board connected to connector CN603 of the CD board. (See Fig.3) (2) Disconnect the connector wire from Control board connect- ed to connector CN703 of the Equalizer board.

43、(See Fig.3) Fig.3 (3) Remove the two screws D attaching the Front panel. (See Fig.4) Fig.4 (4) Disengage two hooks a engaged both side of the Front panel. (See Fig.5) Fig.5 AA Rubber foot B B C CN603 CN703 D hook a (No.MB725)1-9 3.2.3Removing the CD mechanism (See Fig.6, 7) (1) Disconnect the connec

44、tor wire from Equalizer board con- nected to connector CN2701 of the CD door switch board. (See Fig.6) (2) Remove the four screws E attaching the CD mechanism. (See Fig.6) Fig.6 (3) Turnover the CD mechanism, disconnect the card wire from pickup connected to connector CN905 of the CD board. (See Fig

45、.7) (4) Disconnect the connector wire from CD mechanism con- nected to connector CN907 of the CD board. (See Fig.7) Fig.7 3.2.4Removing the CD board (See Fig.8) (1) Disconnect the card wire from Equalizer board connected to connector CN702 of the CD board. (2) Disconnect the connector wire from Equa

46、lizer board con- nected to connector CN901 of the CD board. (3) Remove the three screws F attaching the CD board. Fig.8 3.2.5Removing the Equalizer board (See Fig.9) (1) Remove the three screws G attaching the Equalizer board. Fig.9 3.2.6Removing the Control board (See Fig.10) (1) Remove the five sc

47、rews H attaching the Control board. Fig.10 3.2.7Removing the USB board (See Fig.11) (1) Remove the two screws J attaching the USB board. Fig.11 CN2701 EE CN905 CN907 CN702 CN901 F G H J 1-10 (No.MB725) SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. SECTION 5 TROUBLESHOOTING T

48、his service manual does not describe TROUBLESHOOTING. (No.MB725) VSE Printed in Japan Victor Company of Japan, Limited Home Entertainment Business Division Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 3-1 PARTS LIST * All printed circuit boards and its assemblies are

49、 not available as service parts. - Contents - Exploded view of general assembly and parts list (Block No.M1) Speaker assembly and parts list (Block No.M2) Electrical parts list (Block No.0110) Packing materials and accessories parts list (Block No.M3) 3- 2 3- 6 3- 7 3-13 UX-TB30B, UX-TB30E, UX-TB30EN, UX-TB30EV AUX-TB30B BUX-TB30E CUX-TB30EN MODELMARK DUX-TB30EV MB725PAR 3-2 Exploded view of general assembly and parts list CD BOX section CD unit section Block No.M MM1 64 57 58 26 64 9 91 86 61 80 30 85 25 59 29 22 95 95 9