JVC-UXH30-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No.22033 2003/03 UX-H30 MICRO COMPONENT SYSTEM 22033200303 UX-H30 TABLE OF CONTENTS 1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2Dis

2、assembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . 1-18 4Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 MICRO COMPONENT SYSTEM Area Suffix B - U.K. E - Continental Europe EN - Northern Europe RadioFans.CN 收音机爱 好者资料库 UX-H30 1-2 (No.2

4、2033) SECTION 1 Important Safety Precautions 1.1 Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the

5、 man- ufacturer. 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

6、alterations 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

7、- 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 Servic

8、e Manu- al. Electrical components having such features are iden- tified by shading on the schematics and by () on the Parts List in the Service Manual. The use of a substitute re- placement which does not have the same safety character- istics as the recommended replacement parts shown in the Parts

9、List of Service Manual may create shock, fire, or oth- er 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

10、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 normal, after reassembling. (5) Leakage shock hazard testing) After reassembling the product, always perform an isolation check on the exposed met

11、al parts of the product (antenna 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 out

12、let. 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

13、 the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 ohm 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage ac

14、ross 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 the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measu

15、red any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2 Warning (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) R

16、epairs 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 mains voltage selector is provided, check setting for local voltage. 1.3 Caution Burrs formed during molding may be left over on some parts

17、 of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4 Critical 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 r

18、esistor ( ), 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. (Except the JC version) RadioFans.CN 收音机爱 好者资料库 UX-H30 (No.22033)1-3 1.5 Safety Precautions (U.K on

19、ly) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace- ment parts must be identical to those

20、used in the original circuits. (2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by

21、( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident fro

22、m visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock, fire, or other hazards. (4) The leads in the products are routed and dressed with

23、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, and it should be confirmed tha

24、t they have been returned to normal, after re-assembling. 1.5.1Warning (1) Service should be performed by qualified personnel only. (2) This equipment has been designed and manufactured to meet international safety standards. (3) It is the legal responsibility of the repairer to ensure that these sa

25、fety standards are maintained. (4) Repairs must be made in accordance with the relevant safety standards. (5) It is essential that safety critical components are replaced by approved parts. (6) If mains voltage selector is provided, check setting for local voltage. Burrs formed during molding may be

26、 left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. RadioFans.CN 收音机爱 好者资料库 UX-H30 1-4 (No.22033) 1.6 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fab

27、ric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.6.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as C

28、D players. 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 it before placing the traverse unit (optical pickup) on it. (2) Ground yourself

29、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 diode on the replacement optical pickup are shorted. After replacement, return the sh

30、orted 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. 1.7 Handling the traverse unit (optical pickup) (1) Do not subject the traverse uni

31、t (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 replace- ment procedure in the text. Remove the anti-static pin when replacing the tr

32、averse 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.8 Attention when tr

33、averse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the CD servo board. (If the flexible wire is disconnected without applying solder, the CD pic

34、kup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire. CN601 on mechanism board Shorting round Shorting round Flexible wire UX-H30 (No.22033)1-5 1.9 Important for laser products (1) CLASS 1 LASER PRODUCT

35、 (2) DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. (3) CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. (4) CAUTION : The compact dis

36、c player uses 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 de feated. It is dangerous to defeat the safety switches. (5) CAUTION : If safety switches malfunction, the laser is a

37、ble to function. (6) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION Please use enough caution not to see the beam directly or touch it in case of anadjustment or operation check. VARNING Osynli

38、g laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymt- tmlle lasersteilylle. l katso steeseen. ADVARSEL Usynlig laserstrling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udsasttelse for strling.

39、ADVARSEL Usynlig laserstrling ved pning, nr sikkerhetsbryteren er avs- lott. unng utsettelse for strling. REPRODUCTION AND POSITION OF LABELS Caution label UX-H30 1-6 (No.22033) SECTION 2 Disassembly method 2.1 Main body 2.1.1Removing the rear panel (See Fig.1,2) (1) From behind the body, remove the

40、 eight screws A attach- ing the rear panel. (2) Turing the body upside down, remove the two screws B at- taching the rear panel, and remove. Fig.1 Fig.2 A A A A BB CC Front panel assembly Rear panel UX-H30 (No.22033)1-7 2.1.2Removning the side panel (L) and (R) (See Fig.25) Prior to performing the f

41、ollowing procedure, remove the rear panel. (1) Turning the body upside down, remove the two screws C attaching the front panel assembly. (2) Turning the body initial position, open the CD door while pressing the upper OPEN button. (3) Moving the side panel (L) in the arrow direction, remove the pane

42、l from the left side of the body. (4) Moving the side panel (R) in the arrow direction, remove the panel from the right side of the body. Fig.3 Fig.4 Fig.5 Side panel (L) Side panel (R) UX-H30 1-8 (No.22033) 2.1.3Removing the CD player assembly (See Fig.6,7) Prior to performing the following procedu

43、re, remove the rear panel and the left and right side panels. (1) Disconnect the card wires from the two connectors CN603 and CN604 on the CD servo control board. (2) Remove the two screws D attaching the front panel assem- bly on the both sides. (3) Release the two joints a on the both sides of the

44、 front panel assembly. (4) Move the CD player assembly in the direction of the arrow. Fig.6 Fig.7 CD player assemblyCD servo control board CN604 D a CN603 D CD player assembly a UX-H30 (No.22033)1-9 2.1.4Removing the power amplifier board and heat sink (See Fig.810) Prior to performing the following

45、 procedure, remove the rear panel, the left and right side panels, and the CD player assem- bly. (1) Remove the five screws E and F attaching the heat sink. (2) Disconnect the wire from connector CN901 on the power supply board. (3) Disconnect the card wire from connector CN305 on the power amplifie

46、r board. (4) Remove the screw G attaching the power amplifier board. (5) Disconnect the connector CN301 on the power amplifier board, and release the two joints b. REFERENCE: Remove the screw F, then power amplifier board can be re- moved without removing heat sink. Fig.8 Fig.9 Fig.10 E E F Heat sin

47、k Power amplifier board CN301 Power supply board CN901 CN305 Power amplifier board G bb UX-H30 1-10 (No.22033) 2.1.5Removing the tuner board (See Fig.11) Prior to performing the following procedure, remove the rear panel, the left and right side panels, and the CD player assem- bly. (1) Remove the s

48、crew H attaching the tuner board from the right side of the body. (2) Disconnect the card wire from the connector CN1 on the tuner board. (3) Release the joint c, and remove the tuner board backward. Fig.11 2.1.6Removing the front panel assembly (See Fig.12,13) Prior to performing the following proc

49、edure, remove the rear panel the left and right side panels, the CD player assembly, the power amplifier board. (1) Disconnect the card wire from the connector CN714 on the LCD system CPU board. (2) Release the joint d on the bottom of the front panel assem- bly using a screwdriver, and remove the front panel assem- bly toward the front. Fig.12 Fig.13 H Tuner board CN1 c LCD system CPU board CN714 d Front panel assembly UX-H30 (No.22033)1-11 2.1.7Remove the power transformer and power supply board (See Fig.14,15) Prior to pe