Nad-T-572-Service-Manual(1) 电路图 维修手册.pdf

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1、NAD SERVICE MANUAL T 572 T 572 DVD / VCD / CD PLAYER DVD / VCD / CD PLAYER DRAFT DATE: 30 OCT, 2002 RadioFans.CN 收音机爱 好者资料库 CONTENTS SECTION 1 . . . . SUMMARY SECTION 2 . . . . CABINET CONNECT A 1500 OHM 10 WATT RESIS- TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH

2、 GROUND (WATER PIPE, CON- DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED

3、 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT: GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL

4、TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG- NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN- GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SU

5、BJECT : X-RADIATION 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER- SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN- TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC- TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEV

6、EL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA- TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC- TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR- CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR- ABLE LEVELS. 2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST

7、 BE USED. DEGAUSSING SHIELDS ALSO SERVE AS AN X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA- TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS T

8、HE ONE AVAILABLE AT YOUR DISTRIBUTOR. 4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIG

9、H VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT YOU AND YOUR SERVICE ORGA- NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU- LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE- DURE AND THAT THE HIGH VOLTAGE READING BE RECORDED ON EACH CUSTO

10、MERS INVOICE. 5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IT IS NECESSARY TO LOCATE THE CAUSE OF EXCES- SIVE VOLTAGE

11、. 6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE- GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, A

12、VOID SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT. 2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES. SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY- HOLE OR CLOSELY FITTING SHELF SPACE, OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2

13、. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA- TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC- ORATIVE SCARVES OR OTHER COVERINGS

14、 WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER- CIAL MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS. A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AI

15、R FLOW ACROSS THE BOTTOM. BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A R

16、OLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ- ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC.

17、FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS. EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN- GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO

18、HOME AND FAMILY. PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS A.C. VOLTMETER GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC PLACE THIS PROBE ON EACH EXPOSED METAL PART 1-3 SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service data and its supplements and

19、ADDENDUMS, read and fol- low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir- cumstances create conflict between the following servicing precautions and any of the safety precautions in this publi- cations, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1

20、. Always unplug the DVD AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, module, or any other assembly. (2)Disconnection or reconnecting any internal electrical plug or other electrical connection. (3)Connecting a test substitute in parallel wi

21、th an elec- trolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this DVD or any of its assemblies. 3. Unless specified otherwise in this service data, clean elect

22、rical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks

23、 with whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this DVD and/or any of its electrical assemblies unless all solid-state device heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before con

24、nection the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resi

25、s- tance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more than 1M- ohm. Note 1 : Accessible Conductive Parts including Metal pan- els, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) de

26、vices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help

27、 reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor compo- nent or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commer- cially a

28、vailable discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic c

29、harge buildup or exposure of the assembly. 3. Use only a GROUNDED-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do n

30、ot use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec tive package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorte

31、d together by conductive foam, aluminum foil, or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be s

32、ure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor ca

33、n generate static elec- tricity sufficient to damage an ES device.) 5 SPECIFICATIONS GENERAL Power requirementsAC120V, 60Hz Power consumption14W Dimensions(approx.)430 x 118 x 408mm (16.9 X 4.7 X 16.1 inches)(wxhxd) Mass(approx.)5.7kg(12.6 lbs) Operating temperature5C to 40C (41F to 104F) Operating

34、humidity5 % to 90 % SYSTEM LaserSemiconductor laser, wavelength 650nm Signal systemNTSC Frequency responseDVD (PCM 96kHz): 8Hz to 44kHz DVD (PCM 48kHz): 8Hz to 22kHz CD: 8Hz to 20kHz Signal-to-noise ratioMore than 100dB (ANALOG OUT connectors only) Harmonic distortionLess than 0.008% Dynamic rangeMo

35、re than 100dB(DVD) More than 95dB(CD) OUTPUTS VIDEO OUTPUTS1Vp-p, 75 ohms, sync negative, RCA jack x 1 S-V IDEO OUTPUTS(Y)1.0V(p-p), 75, negative sync., Mini DIN 4-pin x 1 (C)0.3V(p-p), 75 ohms COMPONENT VIDEO OUT(Y)1.0V(p-p), 75, negative sync., RCA jack x 1 (PB)/(PR)0.7V(p-p), 75 , RCA jack x 2 Au

36、dio output(digital audio)0.5V(p-p), 75, RCA jack X 1 Audio output(optical audio)0.5V(p-p), 75,Optical connector x 1 Audio output(analog audio)2.0Vrms (1kHz, 0dB), 330, RCA jack (L, R) x 2 2-1 SECTION 2 CABINET RF CD: A,B, E, F DVD: A,B,C,D, DVD; RF PICK UP IC203 DRAM 16bit 16M IC201 HDC25D811B DSP I

37、I IC501 PANTERA IC901 GMS812012 FL DISPLAY KEY Input REMOCON RECEIVER 6MHz X-TAL Pb IC301 CPLD I/O PORT 72 IC305 SDRAM 64M IC305 EEPROM IC2M1 KA3031 MOTOR DRIVER IC2A1 HD153702TF RF ICDATA 00:15 ICADD 0:8 LOADING FOCUS,TRACKING,SLED SPINDLE MIRR,TZC,PI,TE FE,DFECT_IN RFO SCLK,SDATA SCOR,SQCK,SQSO XL

38、AT , E_STI , E_ENB , E_DR RF_XLAT , LDON IC401 CS4391 2DAC XIO1,XIO2 ,XIO10 F_CLK F_OUT PCMCLK SPINDLE_FG MSDATO MDP1 FOK DEFECT DSP_SENSE LOCK E_SOUT ZISENB /XRST DAC_RST 16 : 9 , PAL_SW , AUTO_SW , MIC_ON Y_SEL /A_MUTE /DAC_CS1 /DAC_CS2 V_MUTE DAC_CLK DAC_OUT ADCCLK ACT_MUTE , LOAD_OPEN , LOAD_CLO

39、SE MIRR AD 00 : 19 PSENB FLD /FLD_CS FLD_CLK FLD_OUT /FLD_CS COMM_CLK COMM_OUT CPLD EE_CS , EE_CLK , EE _OUT F_IN IC306 FLASH ROM F_IN /MRESET /FLASH_CS, /RDPWEO LA0 LA1 LA2 LA3 AD 04 : 19 MD00:31 MCLK2 CKE MA00:10 MA12,13 /CS0 /RAS /CAS /WE DQM03 REQP SDCLKI , PSYNC DVD1:7 DSP_INT SENSE /DSP_CS LRC

40、K DAC-CS AOUT3 L Comp 12V TRIGGER osite FILTER Y Pr SW602 Video SW CVBS/Pr/R , C/Pb/, Y/G Y C L/R -VF AC 120V, 60Hz POWER BOARD -VF -27VA +8V +5.2VA +5V_D +5V_A +12V_A +3.3V_M AD0:7 LADD45 , LA03 AD 00 : 15 MDP,FDO,TDO,FMO,MON OPEN_SW CLOSE_SW LIMIT_SW CPLD SBADD , 27MHz X-TAL 33.8688 MHz X-TAL +3.3

41、V +3.3V_MI POWER_CTL /SRST R AMP 3-13 2. Power(SMPS) Block Diagram 5V_D 5V_A -27VA VF+ RECTIFIERLINE FILTER SWITCHING TR TRANS FEED B. REG(8V) 8V 5.2VA VF- RECTIFIER(FLD) RECTIFIER(9V) RECTIFIER(5.2V) LPF LPF RECTIFIER(14V)LPF12V_A AC120V PWR ON/OFF REG(3.3V) REG(3.3V) 3.3V_MI, 3.3V 3.3V,3.3V_M RECT

42、IFIER(3.8V)LPF REG (12V) 3-14 8 8 SENS, FOK, SLD_FG, MSDAT0, DEFECT,DSP_SENSE IC2M1 KA3031 SpindleMotor,LoadingMotor, Actuator Driver CD: A,B,C,D / E, F 4 4 4 4 MIRR,TZC 8 8 5 5 3 3 3 3 SQSO, SQCK, SCORSCOR 6 6 XLAT, S_CLK, S_DATA UCOM I/F focus, tracking, loading, sled Spindle M/D PICK UP MCK IC201

43、 HDC25D811B CD / DVD DSP DVD SERVO IC2A1 HD153702TF RF Signal Processor FDO,TDO,FMO Load open/close(loading control) UCOM I/F DVD: A,B,C,D, FE,TE,PI,SBADD 4 4 DVD/CD RF IC203 SDRAM 16 9 ICADDR0:8 ICDATA00:15 DO0:7 AO0:5 DVD_DATA0:7 MON,MDP SPINDLE_FG MPEG I/F 2 2 DSP_CS, /WR, /RD3 3 8 8 3. RF/CD DSP

44、/DVD DSP/DVD SERVO Block Diagram 3-15 4. Audio Block Diagram IC401 CS4391 Audio DAC IC402 LPF & Buffer NJM4580D OP AMP L R U-COM I/F A_0WT3 /SRST DAC COMM_DATA COMM_CLK DAC_CS LRCK DA_BCK DA_XCK L R MPEG I/F 3-16 5. MPEG Block Diagram IC501 PANTERA IC301 CPLD I/O PORT 72 IC305 SDRAM 64M IC502 EEPROM

45、 IC3F1 FLASH MEMORY AD0:78 DSP I/F DVD0:7 8 LA0:3 4 SCLK,SDATA SQCK,SQS0 REQP SDCLK1,PSYNC DSP_INT SENSE /DSP_CS AD00:19 RF & MOTOR I/F MIRR LDON SCLK,SDATA EE_CS F_IN 32 MD00:31 MCLK2 CKE MA00:10 MA12,13 /CS0 /RAS/ /CAS /WE /DQM0:3 SPINDLE_FG LA0:3 4 AD00:15 16 AUDIO I/F DA_DATA DA_BCK,DA_LRCK,DA_X

46、CK DAC_L0,DAC_L1 DAC_RST A/V JACK I/F C/R(B) CVBS/G(R) Y/B(G) CVBS V_MUTE,16:9 ZISENB /RD /PWED 3-173-18 NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. R1A1 56(2W) 02. 03. 19 R14140A CIRCUIT DIAGRAM 1. POWER(SMPS) CIRCUIT DIA

47、GRAM NOTE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode. Oscillation abnormal Digitron no Power 3.3V line dead. No Power 8V line dead 5V_A/5V_D, No Power No Power 3-193-20 56 Spindle Servo

48、Loop RF SIGNAL Focus Servo Loop Tracking Servo Loop Sled Servo Loop WAVEFORM D201 D202 R284 R283 02. 03. 19 R14135A 2. DVD DSP CIRCUIT DIAGRAM DVD/CD picture audio abnormal-com Interface adress CD/DVD picture audio abnormal Focus Servo fail Tracking Servo fail Scratched Disc abnormal Sled Servo fail

49、 DRAM Control Disc Detect Error Spindle Servo fail 3-213-22 3. DRIVE & RF CIRCUIT DIAGRAM 4 18 1920 21 1 6 2 3 21 18 20 19 WAVEFORM Spindle Servo Loop Turn Table Loop Focus Servo Loop Tracking Servo Loop Sled Servo Loop R2R3 R2R1 0 R2R4 02. 03. 19 R14133A Turntable not operate DVD laser not operate CD laser not operate Tray Loading Speed control Turn table speed control Actuator spindle sled not operate CD laser not operate Tracking Servo fail Servo fail Focus Servo fail 3-233-24 10 7 9 13 8 1112 WAVEFORM OPTICAL/COAXITAL OUT Y/Pb/Pr(Componen