JVC-UXL40-cs-sm 电路图 维修手册.pdf

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1、1-1 UX-L40/UX-L30 SERVICE MANUAL MICRO COMPONENT SYSTEM No.21105 Jul. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. UX-L40/UX-L30 UX-L40/UX-L30 Safety precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Contents Flow of functional operation

2、 until TOC read (CD) Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1-2 1-3 1-4 1-5 1-19 1-24 1-25 1-25 1-2635 STANDBY/ON DISPLAY CLOCK /TIMER SLEEP BASSTREBLE UP DOWN CANCELSET CDTAPEFM/AMAUX/MD CD PRGMRANDOMREPEAT SURROUND AHB PRO DIMMER VOLUME REV.MODE FM MODE AU

3、TO PRESET RM-SUXL40U REMOTE CONTROL COMPACT DIGITAL AUDIOCD-R/RW PLAYBACK RECSURRONDAHB PRO VOLUME BASSTREBLE PHONES A UT O REVERSE CDTAPE FM/AM MICRO COMPONENT SYSTEM UX-L40 CLOCK/TIMERAUX/MD DOWNUP STANDBY / ON + PUSH OPEN SP-UXL40SP-UXL40CA-UXL40SP-UXL30SP-UXL30CA-UXL30 STANDBY/ON DISPLAY CLOCK /

4、TIMER SLEEP BASSTREBLE DOWN CANCELSET CD PRGMRANDOMREPEAT AHB PRO DIMMER VOLUME REV.MODE FM MODE AUTO PRESET 1 4 7 10 2 5 8 3 6 9 +10 RM-SUXL30U REMOTE CONTROL UP CD/TAPEFM/AMAUX/MD COMPACT DIGITAL AUDIOCD-R/RW PLAYBACK RECREV. MODEAHB PRO VOLUME BASSTREBLE PHONES A UT O R E V E R S E CDTAPE FM/AM M

5、ICRO COMPONENT SYSTEM UX-L30 CLOCK/TIMERAUX/MD DOWNUP STANDBY / ON + PUSH OPEN US - Singapore UP - Korea UW - Brazil,Mexico,Peru UJ - U.S.Military Area Suffix UX-L30 US - Singapore UP - Korea UW - Brazil,Mexico,Peru Area Suffix UX-L40 RadioFans.CN 收音机爱 好者资料库 1-2 UX-L40/UX-L30 1. This design of this

6、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 manufacturer. Replacement parts must be identical to those used in the original circuits. S

7、ervices should be performed 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 the manufa

8、cture 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 characteristics are often not evident from visual inspection nor can the protection afforded by them necessar

9、ily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by

10、( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics 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 dr

11、essed 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, and it should be co

12、nfirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphon

13、e 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 meta

14、l parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current 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 ohms per v

15、olt or more sensitivity in the following manner. Connect a 1,500 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 across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal par

16、t, particularly any exposed metal part having a return path to the chassis, and meausre 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. This equ

17、ipment 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 safety critical

18、components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage. 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 ! Burrs formed during molding may be

19、 left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. 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

20、( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. (This regulation does not correspond to J and C version.) RadioFans.CN 收音机爱 好者资料库 1-3 UX-L40/UX-L30 Preventing static electricity 1.Grounding to prevent damage by static electricity Electrostatic discharge (ESD), wh

21、ich 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. 2.About the earth processing for the destruction prevention by static electricity Static electricit

22、y in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. 2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate o

23、ver it before placing the traverse unit (optical pickup) on it. 2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. 3. Handling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser

24、 diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2. 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 d

25、iode. 4.Handling 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

26、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 when subjected to strong force. 4. It is not possible to adjust the semi-f

27、ixed resistor that adjusts the laser power. Do not turn it Attention when traverse unit is decomposed 1.Solder is put up before the card wire is removed from connector on the CD substrate as shown in Figure. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)

28、 2.Please remove solder after connecting the card wire with when you install picking up in the substrate. *Please refer to Disassembly method in the text for pick-up and how to detach the substrate. (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate CN601 on mecha

29、nism board Shorting round Shorting round Flexible wire RadioFans.CN 收音机爱 好者资料库 1-4 UX-L40/UX-L30 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable

30、parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlo

31、cks have failed or are de feated. 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 herein may result in hazardous radiation exposu

32、re. VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg uds

33、ttelse for strling. ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTION AND POSITION OF LABELS WARNING LABEL CLASS 1 LASER PRODUCT !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or

34、 operation check. 1-5 UX-L40/UX-L30 Remove the six screws A on the back of the main body. Remove the screw B on each side and remove the cover in the direction of the arrow. 1. 2. Disassembly method Removing the Metal cover (See Fig.1 to 3) Fig.1 Fig.2Fig.3 A A A BB 1-6 UX-L40/UX-L30 Remove the meta

35、l cover. Remove the two screws C retaining the rear cover.1. Removing the Rear cover (See Fig.4) Remove the metal cover and the rear cover. Remove the twelve screws D retaining the rear panel. Release the two joints a on the rear side and the joint b on each side. 1. Removing the Rear panel (See Fig

36、.5) Fig.4 Fig.5 C C D D D DD D a bb 1-7 UX-L40/UX-L30 Remove the metal cover. Disconnect the card wire from connector CN1 on the tuner board. Remove the two screws E on the rear side and the screw F on the side. 1. 2. Removing the Tuner board (See Fig.6) Remove the metal cover. Disconnect the shield

37、 wire from connector CN905 on the optical digital board. Remove the screw G on the rear side and the screw H on the upper side. 1. 2. Removing the Optical digital board (See Fig.7) Fig.6 Fig.7 E F G H CN1 CN905 Tuner board Optical digital board 1-8 UX-L40/UX-L30 Remove the metal cover, the rear cove

38、r, the rear panel, the tuner board and the optical digital board. Disconnect the card wire from connector CN903 and CN904 on the main board. Pull the joint c in the direction of the arrow and remove the CD-R/RW mechanism assembly backward while releasing the joint d. 1. 2. Removing the CD-R/RW mecha

39、nism assembly (See Fig.8) Fig.8 c d CD-R/RW mechanism assembly Main board CN904 CN903 1-9 UX-L40/UX-L30 Remove the metal cover, the rear cover and the rear panel. Disconnect the card wire from connector CN902, CN903, CN904 and CN905 on the main board and remove the CD-R/RW mechanism assembly. 1. Rem

40、oving the Main board/ the Heat sink board (See Fig.9 to 11) Remove the two screws I to remove the main board. Disconnect the card wire from connector CN931, CN935, CN933, CN934, CN913, CN901, CN900 and CN917 on the main board. Remove the band f and disconnect the card wire from connector CN951 on th

41、e power transformer assembly. Remove the main board / the heat sink board from the body. Release the joint e of the main board and disconnect connector CN944 and CN945 of the heat sink board from connector CN915 and CN916 of the main board respectively. 2. 3. 4. 5. Refer to the method of removing th

42、e CD-R/RW mechanism assembly and Fig.8. REFERENCE: Fig.9 CN916 CN900 CN901 CN913 CN934 CN933 CN935 CN917 CN951 CN905 CN902CN904 CD-R/RW mechanism assembly CN903 CN915 Fig.10Fig.11 CN945 CN944 I f I e Main board Main board Main board Heat sink board Heat sink board Power transformer assembly CN931 1-

43、10 UX-L40/UX-L30 Remove the metal cover, the rear cover, the rear panel, the CD-R/RW mechanism assembly and the main board. Disconnect the power cord from connector J1000 on the power transformer assembly. Remove the four screws J. 1. 2. Removing the Power transformer assembly (See Fig.12) J JJ J100

44、0 Power transformer assembly Fig.12 1-11 UX-L40/UX-L30 Remove the metal cover. Remove the screw K on each side. Pull the joint h on both sides and lift the front panel assembly to release the joint g. Disconnect connector CN931, CN935, CN933 and CN934 on the main board. Disconnect the card wire from

45、 connector CN33 and CN34 on the cassette mechanism board. 1. 2. 3. Removing the Front panel assembly (See Fig.13 to 16) Fig.13 Fig.14 Fig.15Fig.16 K K h hh g g h g Main board Front panel assembly Front panel assembly CN935CN931 CN933 CN934 CN34 CN33 Cassette mechanism boardCassette mechanism assembl

46、y 1-12 UX-L40/UX-L30 Prior to performing the following procedure, remove the metal cover and the front panel assembly. Disconnect connector CN913 on the main board.1. Removing the Phones board (See Fig.17) Prior to performing the following procedure, remove the metal cover and the front panel assemb

47、ly. Remove the four screws L retaining the cassette mechanism assembly. 1. Removing the Cassette mechanism assembly (See Fig.18) Main board CN913 Phones board Fig.17 Fig.18 L L Cassette mechanism assembly 1-13 UX-L40/UX-L30 Prior to performing the following procedure, remove the metal cover and the

48、front panel assembly. Remove the seven screws M to remove the control board. 1. Removing the Control board (See Fig.19) Prior to performing the following procedure, remove the metal cover and the front panel assembly. Remove the four screws N attaching the volume panel on the front panel assembly. Remove the six screws O attaching the volume board on the vo