JVC-XVN55SL-cd-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.A0041 2003/04 XV-N50BK,XV-N55SL DVD VIDEO PLAYER A0041200303 XV-N50BK,XV-N55SL TABLE OF CONTENTS 1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . 1-3 2Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . 1-15 4Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 213 546 879 010+10 TITLE/ GROUP TV/VIDEO CANCELRETURN VOLVOL+ CH + CH VFPZOOM AMP VOL AUDIO 3D PHONIC SUB TIT

4、LEANGLE DIMMERREPEAT OPEN/ CLOSE TV4TV5TV6 TV7TV8TV9 TV-/-TV0MUTING TVDVD NEXTPREVIOUS SELECTCLEAR SLOW-SLOW+ T O P M E N U M E N U O N S C R E E N C H O I C E ENTER STANDBY/ON TVDVD PROGRESSIVE SCAN TV1TV2TV3 Area Suffix (XV-N50BK) J - U.S.A. C - Canada Area Suffix (XV-N55SL) J - U.S.A. C - Canada

5、B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe EE - Russian Federation UF - China RadioFans.CN 收音机爱 好者资料库 XV-N50BK,XV-N55SL 1-2 (No.A0041) SPECIFICATION Specifications and appearance are subject to change without prior notice. Manufactured under license from Dolby Laborator

6、ies. “Dolby” and the double-D symbol are trademark of Dolby Laboratories. Manufactured under license from Digital Theater Systems, Inc. “DTS” and “DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc. GeneralReadable discsDVD VIDEO, DVD-R (Video format), DVDRW(Video format

7、), +RW (Video format),SVCD, Video CD, Audio CD (CD-DA),MP3/WMAformat, JPEG, CD-R/RW(CDDA,SVCD,Video CD, MP3/WMA format, JPEG) Video formatNTSC, 480i (Interlaced scan) / 480p(Progressive scan) selectable OtherPower requirementsAC 120 V, 60 Hz Power consumption11 W (POWER ON), 0.7 W (STANDBYmode) Mass

8、2.1 kg (4.7 lbs) Dimensions (W xH x D)435 mm x 45 mm x 270.5 mm (17-3/16 inch x 2-13/16 inch x 10-11/16 inch) Video outputsCOMPONENT (pin jacks)Y Output: 1.0 Vp-p (75 ohm) PB/PR Output: 0.7 Vp-p (75 ohm) VIDEO OUT (pin jack)1.0 Vp-p (75 ohm) S-VIDEO OUT (S jack)Y Output: 1.0 Vp-p (75 ohm) C Output:

9、286 mVp-p (75 ohm) Horizontal resolution500 lines or more Audio outputsANALOG OUT (pin jack)2.0 Vrms (10 kohm) DIGITAL OUT (COAXIAL)0.5 Vp-p (75 ohm termination) DIGITAL OUT (OPTICAL)-21 dBm to -15 dBm (peak) Audio characteristicsFrequency responseCD (sampling frequency 44.1 kHz):2 Hz to 20 kHz DVD

10、(sampling frequency 48 kHz):2 Hz to 22 kHz(4 Hz to 20 kHz for DTS and Dolby Digital bitstream signals) DVD (sampling frequency 96 kHz)2 Hz to 44 kHz Dynamic range16 bit: More than 98 dB 20/24 bit: More than 100 dB Wow and flutterUnmeasurable (less than + 0.002%) Total harmonic distortionless than 0.

11、006% RadioFans.CN 收音机爱 好者资料库 XV-N50BK,XV-N55SL (No.A0041)1-3 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

12、the original design unless authorized in writing by the 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 alt

13、erations 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 property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have sp

14、ecial 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 rated for higher voltage, watt- age, etc. Replacement parts which have these special safety cha

15、racteristics are identified in the Parts List of Service 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

16、as the recommended replacement parts shown in the Parts 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/

17、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 normal, after reassembling. (5) Leakage shock hazard testing) After reassembling the produ

18、ct, always perform an isolation check on the exposed metal 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 th

19、is 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 having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must n

20、ot 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 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

21、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 the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in

22、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.). 1.2 Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to

23、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 mains voltage selector is provided, check setting for local voltage. 1.3 Caution Bu

24、rrs 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. 1.4 Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams,

25、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 rating as specified by the manufacturer. (Except the JC version) RadioFans.CN 收音机爱 好

26、者资料库 XV-N50BK,XV-N55SL 1-4 (No.A0041) 1.5 Preventing 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

27、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 DVD players. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workben

28、ch 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 main

29、tain 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 optic

30、al pickup. The testers internal power source can easily destroy the laser diode. 1.6 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 nipper

31、s, 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 may

32、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. XV-N50BK,XV-N55SL (No.A0041)1-5 1.7 Importance admistering point on the safety C701 C706 C761 C762 C902 C904 C905 C907 C908 C913 C914 C918 C950 C951 C952 C953

33、 C955 C957 C958 C959 CN901 C963 C964 C965 C966 C967 C970 C973 C988 B112 CN904 CP951 B401 B201 D701 D901 D902 D903 D904 D951 D952 D953 D954 D955 D956 D957 D960 EP951 FC901 FC902 IC901 IC952 J603 J702 L709 L710 L901 L951 L952 L953 L954 L955 P704 P901 PC901 Q753 Q754 Q951 Q953 R901 R903 R906 R910 R912

34、R913 R915 R951 R954 R966 S901 S902 T901 X701 CN651 EP910 B16 B17 B18 CN902 CN903 C906 B803 B301 B107 C808 B802 C802 B1 B4 B601 B9 B8 B12 B10 B11 B19 B104 B103 B7 B206 B501 B102 EP952 EP952 EP952 EP952 EP952 EP952 EP952 EP952 EP952 EP952 EP952 B302 B204 B303 B304 B202 B15 B105 B14 B111 B13 B110 B901

35、B902 B203 B804 B205 B101 B801 B602 B2 B129 B6 B207 B402 B404 B403 WC801 B109 WC802 B106 B108 B603 B604 B128 B55 EP953 B3 Full Fuse Replacement Marking Graphic symbol mark (This symbol means fast blow type fuse.) should be read as follows ; FUSE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,

36、REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ; F901 : 1.6 A / 125 VF901 : 1.6 A / 125 V Marquage Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ; Le symbole graphique (

37、Ce symbole signifie fusible de type a fusion rapide.) doit etre interprete comme suit ; XV-N50BK,XV-N55SL 1-6 (No.A0041) 1.8 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) C

38、AUTION : 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 disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the

39、 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 able to function. (6) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herei

40、n may result in hazardous radiation exposure. CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. VARNING Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO Avattaessa ja suojalukitus ohitetta

41、essa olet alttiina nkymt- tmlle lasersteilylle. l katso steeseen. ADVARSEL Usynlig laserstrling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udsasttelse for strling. ADVARSEL Usynlig laserstrling ved pning, nr sikkerhetsbryteren er avs- lott. unng utsettelse for strling. REPRODUCTION A

42、ND POSITION OF LABEL and PRINT WARNING LABEL and PRINT CAUTION: Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) ADVARSEL: Usynlig laser- strling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udst- telse for strling (d) VARNING: Os

43、ynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s) VARO: Avattaessa ja suo- jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f) The inside of a chassis base XV-N50BK,XV-N55SL (No.A0041)1-7 1.9 Precautions for Service 1.9.1Hand

44、ling of Traverse Unit and Laser Pickup (1) Do not touch any peripheral element of the pickup or the actuator. (2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock. (3) Do not use a tester to examine the laser diode. (The diode can easily be d

45、estroyed by the internal power supply of the tester.) (4) To replace the traverse unit, pull out the metal short pin for protection from charging. (5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of the flexible wire to o

46、pen the circuit. (6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block. Do not change the setting of these half-fixed resistors for laser power adjustment. 1.9.2Destruction of Traverse Unit and Laser Pickup by Static E

47、lectricity Laser diodes are easily destroyed by static electricity charged on clothing or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection: (1) Wear an antistatic wrist wrap. (2) With a conductive sheet or a s

48、teel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate. (3) Please be sure to make the switch of a relay board into the SHORT side before drawing out a wire from the connector CN101 on a servo control board, when taking out a mechanism assembly from a main body. And please be sure to make a switch into the OPEN side after connecting a wire to CN101, when it mounts a mechanism as- sembly in a main body. (4) After removing the flexible wire from the con