JVC-UXG300-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2008 Victor Company of Japan, Limited No.MB665 2008/9 MICRO COMPONENT SYSTEM MB66520089 SERVICE MANUAL UX-G300B, UX-G300E, UX-G300EN, UX-G300EV, UX-G303E, UX-G303EN, UX-G303EV, UX-G305E, UX-G305EN, UX-G305EV, UX-G300A, UX-G300US, UX-G300UF, UX-G300UT, UX-G300UW, UX-G300UG, U

2、X-G300UN, UX-G305UT COPYRIGHT 2008 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 5TROUBLESHOOTING .

5、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 UX-G300EV UX-G303EV UX-G305EV SP-UXG300 SP-UXG300 CA-UXG300 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB665) SPECIFICATION UX-G300 B/E/EN/EV UX-G303 E/EN/EV UX-G305 E/EN/EV Spe

6、cifications and appearance are subject to change without prior notice. Amplifier section OUTPUT POWER 60 W (30 W + 30 W) at 4 (10% THD) Speakers/Impedance 4 - 16 Audio input AUDIO IN 500 mV/47 k (at “IN LVL1”) 250 mV/47 k (at “IN LVL2”) 125 mV/47 k (at “IN LVL3”) Digital input USB MEMORY Tuner secti

7、on FM tuning range 87.50 MHz - 108.00 MHz AM (MW) tuning range 522 kHz - 1 629 kHz CD player section Dynamic range 88 dB Signal-to-noise ratio 85 dB Wow and flutter Immeasurable USB storage USB specification Compatible with USB 2.0 Full Speed Compatible device Mass storage class Compatible file syst

8、em FAT16,FAT32 Bus power supply Max. 500 mA Speakers Speaker units 10 cm cone x 1 Impedance 4 Dimensions (approx.) 160 mm x 250 mm x 150 mm (W/H/D) Mass (approx.) 1.6 kg each General Power requirements AC 230,50 Hz Power supply to USB mass storage class device DC 5 V =500 mA Power consumption 20 W (

9、power on) 6.5 W (standby mode) 1 W or less (Save Mode) Dimensions (W x H x D) 165 mm x 251 mm x 269 mm Mass 2.6 kg RadioFans.CN 收音机爱 好者资料库 (No.MB665)1-3 UX-G300 US/UN/UB/UG/A/UW/UF/UT UX-G305UT Specifications and appearance are subject to change without prior notice. Amplifier section OUTPUT POWER60

10、 W (30 W + 30 W) at 4 (10% THD) Speakers/Impedance4 - 16 Audio input AUDIO IN500 mV/47 k (at “IN LVL1”) 250 mV/47 k (at “IN LVL2”) 125 mV/47 k (at “IN LVL3”) Digital inputUSB MEMORY Tuner section FM tuning range87.50 MHz - 108.00 MHz AM (MW) tuning range530 kHz - 1 710 kHz (in 10 kHz spacing) 531 kH

11、z - 1 710 kHz (in 9 kHz spacing) CD player section Dynamic range88 dB Signal-to-noise ratio85 dB Wow and flutterImmeasurable USB storage USB specificationCompatible with USB 2.0 Full Speed Compatible deviceMass storage class Compatible file systemFAT16, FAT32 Bus power supplyMax. 500 mA Speakers Spe

12、aker units10 cm cone x 1 Impedance4 Dimensions (approx.)160 mm x 250 mm x 150 mm (W/H/D) Mass (approx.)1.6 kg each General Power requirementsAC 110 V - AC 240 V , 50/60 Hz AC 240 V , 50 Hz (only Australia) AC 220 V , 50 Hz (only Hong Kong) Power supply to USB mass storage class deviceDC 5 V =500 mA

13、Power consumption20 W (power on) 6.5 W (standby mode) 1 W or less (Save Mode) Dimensions (W x H x D)165 mm x 251 mm x 269 mm Mass2.6 kg RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB665) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and co

14、mponents 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 circuits. Services should be per- formed by qualified personnel onl

15、y. (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 the manufacture of responsibility for personal injury or proper

16、ty 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 them necessarily be obtained by us- ing replacement components

17、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 schematics and by ( ) on the Parts List in the Service Manual.

18、 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 products are routed and dressed with ties, clamps, tubings, barrier

19、s 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, and it should be confirmed that they have been returned to n

20、ormal, 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 jack, control shafts, etc.) to be sure the product is safe to

21、 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 parts of the cabinet, particular- ly any exposed metal part ha

22、ving 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 or more sensitivity in the following manner. Connect a 1,500

23、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, particularly any exposed metal part having a return path to t

24、he 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) This equipment has been designed and manufactured to meet in

25、ternational 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 safety critical components are replaced by approved parts. (5) If

26、 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 system. 1.4Critical parts for safety In regard with component

27、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 replacing them, be sure to use the parts of the same type and ra

28、ting 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 (No.MB665)1-5 1.5Preventing static electricity Electrostatic

29、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 Grounding to prevent damage by static electricity Static electricity in th

30、e 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 laying conductive material (such as a conductive sheet) or an iron plate over

31、 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 quality during transport and before installation, both sides of the laser diod

32、e 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 pickup. The testers internal power source can easily destroy the laser diode. 1.

33、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. after replacing the optical pickup. For specific details, refer to the repla

34、cement 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 when subjected to strong force. (4) I t is not possible to adjust the semi-fix

35、ed 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 card wire is disconnected from the connecto on the servo board. (If the card

36、 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 (conductive sheet) or iron palate (caption) Anti-static wrist strap Solder

37、short land section 1-6 (No.MB665) 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 invisible class 1M laser radiation when open. Do not view directly with opti

38、cal 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 and is equipped with safety switches which prevent emission of radiation when

39、 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, adjustments or performance of procedures other than those specified here i

40、n 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 PRINT (No.MB665)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS New CD mechanism

41、 was added. In a model using new CD mechanism for, it stick a blue label for identification on the back side. When it repair the CD mechanism of an article sticking this label on, please use a parts list of FMU-VK1-2M. SECTION 3 DISASSEMBLY 3.1Main body (Used figure are UX-G300E) 3.1.1Removing the M

42、etal Cover (See Fig.1, 2) (1) Remove the seven screws A attaching the Metal cover. (See Fig.1) (2) Remove the two screws B attaching the both side of the Metal cover. (See Fig.2) Fig.1 Fig.2 A label for identification AA B 1-8 (No.MB665) 3.1.2Removing the Tuner pack (See Fig.3, 4) (1) Disconnect the

43、 card wire from Tuner pack connected to connector CN306 of the Micom board. (See Fig.3) (2) Remove the two screws C attaching the Tuner pack. (See Fig.4) Fig.3 Fig.4 3.1.3Removing the Rear panel (See Fig.5) (1) Remove the five screws D attaching the Rear panel. Fig.5 3.1.4Removing the Amp board (See

44、 Fig.6) (1) Disconnect the connector wire from Power board connect- ed to connector CN640 of the Amp board. (2) Disconnect the card wire from Amp board connected to connector CN520 of the Micom board. (3) Remove the one screw E attaching the Amp board. Fig.6 CN306 C D ECN520 CN640 (No.MB665)1-9 3.1.

45、5Removing the CD mechanism (See Fig.7 to 9) (1) Disconnect the card wire from CD mechanism connected to connector CN360 and CN362 of the Connection board. (See Fig.7) (2) Disconnect the card wire from CD mechanism connected to connector CN205 of the Power board. (See Fig.7) (3) Remove the two screws

46、 F attaching the CD mechanism. (See Fig.8) (4) Disconnect the connector wire from USB jack board con- nected to connector CN802 of the CD servo control board. (See Fig.9) Fig.7 Fig.8 Fig.9 CN360CN362CN205 F CN802 1-10 (No.MB665) 3.1.6Removing the Mecha chassis (See Fig.10, 11) (1) Remove the two scr

47、ews G attaching the both side of the Front panel. (See Fig.10) (2) Disconnect the card wire from Connection board connect- ed to connector CN311 of the Micom board. (See Fig.11) Fig.10 Fig.11 G CN311 (No.MB665)1-11 3.1.7Removing the Front panel (See Fig.12 to 14) (1) Disconnect the card wire from FL

48、 board connected to con- nector CN304 of the Micom board. (See Fig.12) (2) Disconnect the card wire from Volume board connected to connector CN303 of the Micom board. (see Fig.12) (3) Remove the two screws H attaching the Front panel. (See Fig.13) (4) Disengage two hooks a engaged both side of the F

49、ront panel. (See Fig.14) (5) Disengage one hook b engaged bottom side of the Front panel. (See Fig.13) Fig.12 Fig.13 Fig.14 CN304 CN303 hook b HH hook a 1-12 (No.MB665) 3.1.8Removing the Micom board (See Fig.15, 16) (1) Remove the two screws J attaching the Micom board. (See Fig.15) (2) Disconnect the flat cable wire from Micom board connected to connector CN201 and CN203 of the Power board. (See Fig.16) (3) Disconnect the board to board connector connected to connector CN204 of the Power board. (See Fig.16) (4) Disconnect the board