NAD T571AH Service Manual Download | Manualshive

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3-19

3-20

5

5

6

Spindle Servo Loop

RF SIGNAL

Focus Servo Loop

Tracking Servo Loop

Sled Servo Loop

WAVEFORM

T571C/T571AH

2. DVD DSP CIRCUIT DIAGRAM

DVD/CD picture

audio abnormal

MPEG Interface

Line

µ-com

Interface Data

µ-com

Interface adress

CD/DVD picture

audio abnormal

Tracking/Focus

Servo fail

Tracking

Servo fail

Spindle Motor

abnormal

CD/DVD picture

audio abnormal

Focus Servo

fail

Tracking

Servo fail

Scratched

Disc abnormal

Sled Servo fail

DRAM Control

Disc Detect

Error

Spindle Servo fail

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Summary of Contents for T571AH

Page 1: ...SERVICE MANUAL SERVICE MANUAL T571C T571AHDVD VIDEO PLAYER T571C T571AH DVD VIDEO PLAYER T571C T571AH DVD VIDEO PLAYER MODELS T571C T571AH SERVICE MANUAL NAD 2001 NAD ELECTRONICS INTERNATIONAL TORONTO ...

Page 2: ...21 R10581B T571C T571AH 3 17 3 18 CIRCUIT DIAGRAM 1 POWER SMPS CIRCUIT DIAGRAM 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 ...

Page 3: ...VD CD picture audio abnormal MPEG Interface Line µ com Interface Data µ com Interface adress CD DVD picture audio abnormal Tracking Focus Servo fail Tracking Servo fail Spindle Motor abnormal CD DVD picture audio abnormal Focus Servo fail Tracking Servo fail Scratched Disc abnormal Sled Servo fail DRAM Control Disc Detect Error Spindle Servo fail ...

Page 4: ...Sled Servo Loop T571C T571AH Turntable not operate Tray Loading Speed control Turn table speed control Spindle Motor unstable Actuator spindle sled not operate DVD laser not operate CD laser not operate Servo fail DVD Mode fail DVD Laser not operate Tracking Servo fail Focus Servo fail µ com Interface line CD DVD picture abnormal ...

Page 5: ...AL OUT Y Pb Pr Component Y c S VHS Audio L R OUT CVBS T571C T571AH 3 23 3 24 4 PANTERA CIRCUIT DIAGRAM No Power on Audio DAC Interface System not operate DSP interface line Spindle Motor unstable System not working or Digitron not display ...

Page 6: ...7 Glitch Ch1 Ch3 500mV T T 3 IC501 Pin 114 Luminance Super video out Mode Tek Stop 1 00kS s 3290 Acqs M 500µs CH1 280 mV Edge Slope Type Edge Source Ch1 Coupling DC Level 280mV Mode Holdoff 3 Ch3 1 00V T T Slope T IC501 Pin 99 PANTER MAIN IC501 Pin 112 Component Pb IC501 Pin 110 Component Pr TURN from Motor Drive Reverse turn Sensor 1 disc position Sensor 2 disc ready TURN Signal from µ com TE TZC...

Page 7: ...n Not memoried setup Menu Turntable not operating No Disc display Tray not open close Tray not closed Pick up not initial operating Disc Detec Error Disc number detect error Digitron all not display and system not operate Digitron all not display System not working Digitron all not display System not working ...

Page 8: ...3 29 3 30 6 TIMER KEY CIRCUIT DIAGRAM T571C T571AH System not operate Remocon not operate Power not control Digitron abnormal Digitron abnormal ...

Page 9: ... 31 3 32 7 A V CIRCUIT DIAGRAM L R T571C T571AH Q401 is defective 2CH Audio out bad IC401 is defective 2CH Audio out bad IC401 is defective 2CH Audio out bad IC403 Q404 are defective Digital data out bad ...

Page 10: ...3 33 3 34 8 A V JACK CIRCUIT DIAGRAM T571AH ONLY T571C T571AH Component S Video out can t be changed ...

Page 11: ...3 35 3 36 9 SCART CIRCUIT DIAGRAM T571C ONLY T571C T571AH Component S Video out can t be changed ...

Page 12: ... 97 98 99 100 3 1 3 1 3 1 3 1 3 1 3 1 3 1 0 5 0 3 1 3 1 3 1 3 1 3 1 1 6 0 0 3 1 0 3 1 0 3 2 0 3 1 0 3 0 0 2 5 0 3 19 3 19 4 4 3 19 4 4 0 4 4 0 0 0 0 0 3 17 3 17 3 1 0 P A N T E R A M E M O R Y I C 3 0 1 I C 5 0 1 EE PLAY MODE PIN NO D S P IC201 SP3301 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 5...

Page 13: ... 50 1 50 1 50 1 50 1 50 2 60 1 50 3 10 3 10 3 38 3 40 2 50 2 53 3 44 3 44 3 45 3 44 EE PLAY MODE PIN NO 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 3 48 3 43 2 52 2 52 2 52 2 52 2 56 2 48 2 98 0 00 4 50 0 00 0 00 4 96 0 00 4 95 5 00 2 52 1 55 4 97 0 00 2 55 2 51 4 90 0 00 0 00 0 ...

Page 14: ...3 41 3 42 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...

Page 15: ...3 43 3 44 LOCATION GUIDE 2 AV JACK P C BOARD 4 FRONT P C BOARD LOCATION GUIDE 3 SMPS P C BOARD ...

Page 16: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM SECTION 5 REPLACEMENT PARTS LIST ...

Page 17: ...MMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS 1 3 SERVICING PRECAUTIONS 1 4 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS 1 5 ...

Page 18: ...se specified to comply with X ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission 3 Use Specified internal wiring Note especially 1 Double insulated wires 2 High voltage leads 4 Use specified insulating materials for hazardous live parts Note especially 1 Insulation Tape 2 PVC tubing 3 Spacers...

Page 19: ...el only Note This table is unofficial and for reference only Be sure to confirm the precise values for your particular country and locality Leakage Current test Confirm specified or lower leakage current between B earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals micro phone jacks earphone jacks etc...

Page 20: ...0dB EIAJ Harmonic distortion audio 0 003 Wow and flutter Below measurable level less than 0 001 W PEAK EIAJ Operations Temperature 5 C 41 F to 35 C 95 F Operation status Horizontal OUTPUTS Video outputs 1 0V p p 75Ω negative sync RCA jack x 1 SCART TO TV T571C ONLY S video outputs Y 1 0V p p 75Ω negative sync Mini DIN 4 pin x 1 C 0 286V p p 75Ω Component video output Y 1 0V p p 75Ω negative sync R...

Page 21: ...1 SECTION 2 CABINET MAIN CHASSIS CONTENTS 1 DISASSEMBLY 2 2 CABINET DISASSEMBLY 2 2 CIRCUIT BOARD DISASSEMBLY 2 3 2 EXPLODED VIEWS 2 4 1 Cabinet and Main Frame Section 2 4 2 Packing Accessory Section 2 5 ...

Page 22: ...e pitch screws used to secure metal parts If they are used improperly the screw holes will be easily damaged and the parts can not be fixed Top Case A A A A A A A Disc Tray Tray Door Front Panel Stopper Stopper CABINET DISASSEMBLY 1 Top Case 1 Release 7 screws A See Fig 2 1 2 Lift the top case with holding the back of it and remove it in the direction of the arrow Fig 2 1 Fig 2 2 Fig 2 3 3 Front P...

Page 23: ...in chassis 6 Unscrew 4 screws D at MD Ass y DPM1 7 Turn the portion the direction of arrow to move the Base Assembly Tray in front of you 8 Release the other 3 screws E 9 Disassemble MD Ass y DPM1 from Main chassis 10 Unscrew 4 screws F at Power circuit 11 Disassemble power circuit board from Main chassis CIRCUIT BOARD DISASSEMBLY Note Before removing the main circuit board be sure to shortcircuit...

Page 24: ...EXPLODED VIEWS 1 Cabinet and Main Frame Section 465 465 250 462 462 300 465 260 465 A46 A47 463 463 275 463 463 463 467 A48 463 463 463 463 463 A00 A43 280 285 262 452 452 DIG901 PBTOO 283 A 5 4 3 2 1 B C D ...

Page 25: ...2 5 2 Packing Accessory Section BATTERY 808 PACKING SHEET 804 PACKING OPTIONAL PARTS 803 811 812 OWNER S MANUAL 810 CABLE SET ASS Y 801 REMOCON 900 BOX CARTON 802 PACKING 803 ...

Page 26: ...4 Audio Block Diagram 3 15 5 MPEG Block Diagram 3 16 CIRCUIT DIAGRAMS 3 17 1 Power SMPS Circuit Diagram 3 17 2 DVD DSP Circuit Diagram 3 19 3 Drive RF Circuit Diagram 3 21 4 MPEG Circuit Diagram 3 23 WAVEFORMS 3 25 5 Audio DM 5 1CH Circuit Diagram 3 27 6 TIMER Key Circuit Diagram 3 29 7 A V Circuit Diagram 3 31 8 A V Jack Circuit Diagram 3 33 9 SCART Circuit Diagram 3 35 CIRCUIT VOLTAGE CHART 3 37...

Page 27: ...Replace R102 Replace BD101 Bridge rectifier Is R102 R104 normal Is about AC 100V app ied to IC101 Pin 3 Check IC101 Is 5 2V applied to IC102 Pin 1 Is there a DC voltage at the terminal of BD101 Check R127 128 SHUTDOWN CKT 1 Power SMPS Circuit No FLD Is 5 2VA section working Replace SMPS trans T101 Replace the inferior components Are D109 L103 open NO NO NO NO NO NO YES YES YES YES YES YES YES A B ...

Page 28: ...01 normal Are IC501 Pins 193 808 and 81 normal Do Hello appear at FLD Is P3901 connected normally Is P3901 Pin 8 9 18 normal The waveform on 3 5 7 pin of IC502 normal Check the oscillation Check short OK Replace IC501 or IC306 Check power Refer to power If power is normal OK POWER ON 1 1 YES YES YES YES NO YES YES YES A NO NO NO NO NO NO NO YES A ...

Page 29: ...YES YES If OK YES If OK YES If OK Refer to Audio part Refer to Decoder part Refer to PANTERA part Replace B D Check Front Reconnect it Refer to SERVO part Check the connection of MD AUDIO ABNORMAL OPEN CLOSE ABNORMAL C Video abnormal Check Video jack YES If OK YES If OK YES If OK Refer to Video part Refer to PANTERA part Replace B D VIDEO ABNORMAL ...

Page 30: ...re abnormal Check the disc If OK YES If OK YES If OK Refer to Servo part Check DSP Check PANTERA Replace B D PICTURE ABNORMAL F Disc Error Check Disc YES If OK YES If OK Refer to Servo part Replace B D DISC ERROR ...

Page 31: ...es the audio sound output from PANTERA decoder Does the moving picture of the video CD play on the screen normally Does the audio sound output normally END Check power clock Check CD DVD DSP output signal Check CD DVD DSP output signal Check CD DVD DSP output signal Check clock signal Check clock signal YES YES YES YES YES YES YES YES YES YES NO NO NO OK NO NO NO NO NO 3 PANTERA Circuit _ OPTION _...

Page 32: ...rm of IC901 Pin 22 Does pulse waveform of RC901 Pin 1 appear Is IC901 Pin 17 connected to RC901 Pin 1 Is RC901 Pin 2 5V Power on Check and replace R926 R925 Solder defective parts again Solder defective parts Replace IC901 Solder Key part Check Power Replace IC902 Replace IC901 Replace LED901 Replace RC901 Re solder Recheck Replace IC901 Complete repairing Front B D NO NO NO NO NO NO NO NO NO YES ...

Page 33: ... TTL pulse output to IC201 Pins 140 142 Does 33 8688MHz clock input to IC201 Pin 63 Is IC201 Pins 83 84 88 89 voltage about 2 2V Replace IC201 IC206 soldering or IC defect Check power circuit Check 2 PANTERA Part Replace X201 or IC206 30MHz clock defect CHECK POINT General 5 RF Servo Circuit A END NO NO NO NO NO YES YES YES YES YES ...

Page 34: ...e up and down Check Focus Driver output IC201 Pin 83 IC2M1 Pins 37 38 Check SLED Driver output IC201 Pin 88 IC2M1 Pins 28 29 IC201 Pin 88 no output IC201 is defective IC2M1 Pins 28 29 no output IC2M1 is defective IC201 Pin 83 no output IC201 is defective IC2M1 Pins 37 38 no output IC2M1 is defective DECK assembly is defective Slide the pick up to inner track Power on Check loading Part Push Pick u...

Page 35: ...pear OPEN CLOSE Replace IC501 or IC201 Replace IC201 Check IC2A1 Pin 11 12 13 14 in DVD Mode Fig 3 FOCUS ERROR waveform IC201 no output Pick up is defective Check IC201 and IC2M1 when PMD03 Pin 5 is abnormal Check IC2M1 Pin 21 PMD03 Pin 5 turn when the IC2M1 Pin 21 is less than 2 2V Check A Video Part is defective Check PANTERA Circuit Check 7 OSD Video Circuit Replace PANTERA part IC2A1 is defect...

Page 36: ... RF 1 5 1 6V IC2A1 Pin 57 Fig 5 RF waveform Check IC2A1 Pins 5 6 7 8 No signal Pick up is defective Replace IC201 Check IC201 Pin84 No signal at IC201 IC201 is defective Check IC201 Pin 162 Check the clock at the IC201 Pins 28 30 Both are normal IC201 is defective Replace IC2A1 CHECK A D END NO NO NO NO YES YES YES YES ...

Page 37: ...O10 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_CLOSE 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 IC3F1 FLASH ROM F_IN MRESET 74573 FLASH_CS RD PWEO LA0 LA1 LA2 LA3 ALE AD 04 19 LA...

Page 38: ...am 5V_D 5V_A 27VA VF RECTIFIER LINE FILTER SWITCHING TR TRANS FEED B REG 8V 8V 5 2VA VF RECTIFIER FLD RECTIFIER 9V RECTIFIER 5 2V LPF LPF RECTIFIER 14V LPF 12VA PWR ON OFF REG 3 3V REG 3 3V 3 3V 3 3V 3 3V_M RECTIFIER 3 8V LPF 12VA ...

Page 39: ...COM I F focus tracking loading sled Spindle M D PICK UP MCK IC206 DVDSP 3301 CD DVD DSP DVD SERVO IC2A1 33P3721 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 DRAM 256K x 16bit 16 9 ICADDR 0 8 ICDATA 00 15 DO 0 7 AO 0 5 DVD_DATA 0 7 MON MDP SPINDLE_FG MPEG I F 2 2 DSP_CS WR RD 3 3 8 8 3 RF CD DSP DVD DSP DVD SERVO Block Diagram ...

Page 40: ...3 15 4 Audio Block Diagram IC401 PCM1716 Audio DAC IC402 LPF Buffer NJM4580D OP AMP U COM I F A_0WT3 SRST DAC COMM_DATA COMM_CLK DAC_CS LRCK DA_BCK DA_XCK L R L R MPEG I F ...

Page 41: ... 7 8 LA 0 3 4 SCLK SDATA SQCK SQS0 REQP SDCLK1 PSYNC DSP_INT SENSE DSP_CS AD 00 19 RF MOTOR I F MIRR LDON SCLK SDATA EE_CS F_IN 32 MD 00 31 MCLK2 CKE MA 00 10 MA12 13 CS0 RAS CAS WE DQM 0 3 SPINDLE_FG ALE AD 04 19 16 LADD 04 19 16 LA 0 3 4 AD 00 15 16 AUDIO I F DA_DATA DA_BCK DA_LRCK DA_XCK 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 ...

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