JVC-XVNA7SL-cd-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. No.A0036 2002/10 XV-NA7SL DVD AUDIO/VIDEO PLAYER A0036200209 XV-NA7SL TABLE OF CONTENTS 1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、3 2Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . 11 4Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . 27 6Glossary of term and abbreviations(for AV Decoder section) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 RadioFans.CN 收音机爱 好者资料库 XV-NA7SL 3 SECTION 1 Important Safety Precautions 1.1 Safety Precautions (1) This design of this product c

5、ontains 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. Services s

6、hould 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 manufacture of

7、 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 them necessarily b

8、e 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 ( ) o

9、n the Parts List in the Service Manual. The use of a sub- stitute 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 dres

10、sed 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 conf

11、irmed 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 metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.)

12、 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 parts of the cabinet, parti

13、cu- larly 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 volt or more sensitivity in

14、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 across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exp

15、osed 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.). 1.2 Warning (1) This equipment has

16、 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 compone

17、nts are replaced by approved parts. (5) If mains voltage selector is provided, check setting for lo- cal voltage. 1.3 Caution 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. 1.4 Criti

18、cal 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 replacing them, be

19、 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 XV-NA7SL 4 1.5 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can de

20、stroy 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 the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use p

21、roper 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 Use an anti-static wrist strap

22、 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 shorted parts to their original

23、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. 1.6 Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) to strong s

24、hocks, 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 replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to t

25、ake 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-fixed resistor that adjusts the laser power. Do not turn it. RadioFans.CN 收音机爱 好者资料库 XV-NA7SL 5 1.7 Important for

26、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 parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it mal

27、functions. (4) CAUTION : The compact disc 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 saf

28、ety 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 exposure. CAUTION Please use enough caution not to see the beam directly or touch it in case of anadjus

29、tment or operation check. VARNING Osynlig laserstrlning r denna del r ppnasd och sprren r urkopplad. Betrakta ej strlen. VARO Avattaessa ja suojalulitus ohitettaessa olet alttiina nkymt- tmlle lasersateilylle. l katso steeseen. ADVARSEL Usynlig laserstrling ved bning, nr sikkerhedsafbrydere er ude a

30、f funktion. Undg udsasttelse for strling. ADVARSEL Usynlig laserstrling ved pning, nr sikkerhetsbryteren er avslott. unng utsettelse for strling. XV-NA7SL 6 1.8 Precautions for Service 1.8.1Handling of Traverse Unit and Laser Pickup (1) Do not touch any peripheral element of the pickup or the actuat

31、or. (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 destroyed by the internal power supply of the tester.) (4) To replace the traverse unit, pull out the metal

32、 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 open the circuit. (6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to

33、match the characteristics of the optical block. Do not change the setting of these half-fixed resistors for laser power adjustment. 1.8.2Destruction of Traverse Unit and Laser Pickup by Static Electricity Laser diodes are easily destroyed by static electricity charged on clothing or the human body.

34、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 steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet

35、or the plate. (3) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip. (4) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solde

36、r to open the circuit. Please refer to Fig.8 of Disassembly method for details. XV-NA7SL 7 SECTION 2 Disassembly method There is a part different from the photograph according to the model and the destination though explains this disassembly method by using version for europe. 2.1 Main body section

37、2.1.1How to remove a top cover (See Figure 1) (1) Screw A attaches a top cover to the main part. Remove the two screws A from the both sides of the main part. (2) Screw B attaches the top cover to the main part. Remove the three screws B from the rear side of the main part. (3) Raise the both sides

38、and lower part of the rear of the top cover, with opening them slightly in an outward direction. And the top cover will be removed. Fig.1 2.1.2How to remove a front panel assembly (See Figure 2, 3, and 4.) Please remove a top cover before removing a front panel as- sembly. Front panel assembly can b

39、e removed without removing mechanism assembly. (1) Insert a kind of screwdriver in a hole located in the left side of mechanism assembly, and push a lever until it cannot be inserted any further. (2) And then, a tray will come out. Remove the tray in an up- per direction, with slightly opening the l

40、ower part of fitting in an outward direction. (3) Screw C attaches LCD display can be used as GPIO 71AOUT3OSerial audio output data to audio DAC for left and right channels for down-mix 72AOUT2OSerial audio output data to audio DAC for surround left and right channels 73AOUT1OSerial audio output dat

41、a to audio DAC for center and LFE channels 74AOUT0OSerial audio output data to audio DAC for left and right channels 75VDDio-Power supply terminal 3.3V 76PCMCLKOAudio DAC PCM sampling clock frequency, common clock for DACs and ADC 77VDD-Power supply terminal 1.8V 78ACLKOAudio interface serial data c

42、lock, common clock for DACs and AD converter 79LRCLKOLeft / right channel clock, common clock for DACs and ADC 80SRSTOActive low RESET signal for peripheral reset 81RSTPIRESET_Power : from system, used to reset frequency synthesizer and rest of chip 82VSSio-Connect to ground 83RXD1IUART1 Serial data

43、 input from external serial device, used for IR receiver 84SSPIN1I/OSSP1 Data in or 16X clock for USART function in UART1 85VSS-Connect to ground 86SSPOUT1I/OSSP1 Data out or UART1 data-terminal-ready signal 87SSPCLK1I/OSSP1 Clock or UART1 clear-to -send signal 88SSPCLK0I/OSSP0 Clock or request-to-s

44、end function in UART1 89VDD-Power supply terminal 1.8V 90SSPIN0I/OSSP0 Data in or 16X clock for USART function in UART0 91VDDio-Power supply terminal 3.3V Pin No.SymbolI/ODescription XV-NA7SL 43 92SSPOUT0I/OSSP0 Data out or UART0 data-terminal-ready signal 93TXD0I/OUART0 Serial data output to an ext

45、ernal serial device 94RXD0IUART0 Serial data input from external serial device 95CTS0I/OUART0 Clear-to-send signal 96RTS0I/OUART0 Request-to-send signal 97VSSio-Connect to ground 98CXIICrystal input terminal for on-chip oscillator or system input clock 99CXOOCrystal output terminal for on-chip oscil

46、lator 100OSCVSS-Connect to ground for oscillator 101OSCVDD-Power supply terminal for oscillator 1.8V 102MVCKVDD-Power supply terminal for main and video clock PLL 3.3V 103SCENIScan chain test enable 104MVCKVSS-Connect to ground for main and video clock PLL 105ACLKVSS-Connect to ground for audio cloc

47、k PLL 106SCMDIScan chain test mode 107ACLKVDD-Power supply terminal for audio clock PLL 3.3V 108VDDDAK-Power supply terminal for DAC digital 1.8V 109VSSDAC-Connect to ground for DAC digital 110Cr/ROVideo signal output (Cr output : composite/component Red output) 111IOMOCascaded DAC differential outp

48、ut used to dump current into external resistor for power 112C/Cb/BOVideo signal output (Chrominance output for NTSC/PAL S-Video 113VAA3-Cb output for component Blue output) 114Y/GOPower supply terminal for DAC analog 3.3V 115VSSA-Video signal output (Luminance for S-Video and component Green output)

49、 116VREF-Connect to ground for DAC analog 117VAA-Non connect 118CVBS/COVideo signal output (Composite video Chrominance output for S-Video) 119RSETOCurrent setting resistor of output DACs 120COMPOCompensation capacitor connection 121VSS-Connect to ground 122VCLK-Non connect 123VSYNC-Non connect 124HSYNC-Non connect 125VDDio-Power supply terminal 3.3V 126131VI0702-Non connect 132VSSio-Connect to ground 133,134VI01,00-Non connect 135VDD-Power supply terminal 1.8V 136139AD3128I/OMultiplexed address / data bus terminal 140VDDio-Power supply terminal 141144AD2724I/OM