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NAD R10581B Circuit Diagram

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CIRCUIT DIAGRAM
1. POWER(SMPS) CIRCUIT DIAGRAM
NOTES)
Warning
NOTES)
Parts that are shaded are critical
NOTES)
With respect to risk of fire or
NOTES)
electricial shock.
Oscillation abnormal
No Power
No Power
Digitron no Power
8V line dead
3-17
3-18
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.
470µF/2.3V
3.3V line dead.
5V_A/5V_D, No Power
'01. 09. 21 R10581B
T571C/T571AH

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  • Page 1 Oscillation abnormal Digitron no Power 470µF/2.3V 8V line dead 3.3V line dead. No Power 5V_A/5V_D, No Power No Power '01. 09. 21 R10581B T571C/T571AH NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock.
  • Page 2 2. DVD DSP CIRCUIT DIAGRAM µ-com µ-com CD/DVD picture Interface Data Interface adress Spindle Servo fail audio abnormal MPEG Interface DVD/CD picture Line audio abnormal Tracking/Focus Servo fail Disc Detect Error Tracking Servo fail DRAM Control CD/DVD picture audio abnormal Scratched Disc abnormal Spindle Motor...
  • Page 3 3. DRIVE & RF CIRCUIT DIAGRAM CD/DVD picture abnormal µ-com Interface line Focus Servo fail Tray Loading Speed control DVD laser not operate Turntable not operate Tracking Servo fail CD laser not operate Turn table speed control Spindle Motor unstable Actuator spindle Servo fail T571C/T571AH...
  • Page 4 4. PANTERA CIRCUIT DIAGRAM System not operate No Power on Audio DAC Interface System not working or Digitron not display. DSP interface line Spindle Motor Y/Pb/Pr(Component) CVBS unstable WAVEFORM Y.c(S-VHS) Audio L/R OUT OPTICAL/COAXITAL OUT T571C/T571AH 3-23 3-24...
  • Page 5 • WAVEFORMS IC2A1 Pin 42, Focus Error IC2A1 Pin 41 IC2A1 Pin 41 IC2A1 Pin 36, Pi Tracking Error VBR TRACKING Error IC501 Pin 114 TURN(+)(-) Signal from µ-com TURN(+)(-) from Motor Drive Component Y Forward turn IC2A1 Pin 57, IC201 Pin 88, SLED Drive(FMO) IC2A1 Pin42, Focus Error(in Focus Search) IC201 Pin 18, SLED FG...
  • Page 6 5. MEMORY CIRCUIT DIAGRAM Program download fail Digitron abnormal Not power on Not memoried setup Menu Digitron all not display System not working Not used Digitron all not display System not working Disc number detect error Digitron all not display and system not operate “No Disc”...
  • Page 7 6. TIMER & KEY CIRCUIT DIAGRAM Digitron abnormal System not operate Power not control Remocon not operate Digitron abnormal T571C/T571AH 3-29 3-30...
  • Page 8 7. A/V CIRCUIT DIAGRAM 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. T571C/T571AH 3-31 3-32...
  • Page 9 8. A/V JACK CIRCUIT DIAGRAM (T571AH ONLY) Component, S-Video out can,t be changed. T571C/T571AH 3-33 3-34...
  • Page 10 9. SCART CIRCUIT DIAGRAM (T571C ONLY) Component, S-Video out can,t be changed. T571C/T571AH 3-35 3-36...
  • Page 11 • CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE MODE MODE LEVEL(V) LEVEL(V) LEVEL(V) LEVEL(V) LEVEL(V) LEVEL(V) LEVEL(V) PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.
  • Page 12 MODE MODE MODE PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. 1.40 1.40 3.48 3.44 2.40 0.90 3.20 0.00 3.43 3.41 1.60 1.75 2.52 2.70 0.00 0.00 2.52 2.70 0.00 3.10 2.52 2.60 0.00 3.10 2.52 2.60 5.00 2.50 2.56 2.70 0.00...
  • Page 13 PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD LOCATION GUIDE 3-41 3-42...
  • Page 14 2. AV JACK P.C.BOARD 3. SMPS P.C.BOARD LOCATION GUIDE LOCATION GUIDE 4. FRONT P.C.BOARD 3-43 3-44...
  • Page 15 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..MECHANISM SECTION 5 ..REPLACEMENT PARTS LIST...
  • Page 16 SECTION 1 SUMMARY 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 17 IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, the products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such com- pliance, it is equally important to implement the following precautions when a set is being serviced.
  • Page 18 SAFETY CHECK AFTER SERVICING Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. •...
  • Page 19 SPECIFICATIONS DVD VIDEO PLAYER Power supply AC 120 V, 60 Hz (T571AH) AC 110~240 V, 50/60 Hz (T571C) Power consumtion 16 W Mass 5.7 kg(12.6 lbs) External dimensions 440 x 118 x 423 mm (W x H x D) Signal system NTSC (T571AH) PAL (T571C) Laser...

  • Page 20: Table Of Contents

    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 21: Disassembly

    DISASSEMBLY CAUTION BEFORE STARTING SERVICING Electronic parts are susceptible to static electricity and may easily and damaged, so do not forget to take a proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing.

  • Page 22: Circuit Board Disassembly

    CIRCUIT BOARD DISASSEMBLY Note: Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector. (Refer to Mechanism Disassembly) 1. Disassemble Main circuit board, Jack 2.

  • Page 23: Exploded Views

    EXPLODED VIEWS 1. Cabinet and Main Frame Section...

  • Page 24: Packing Accessory Section

    2.Packing Accessory Section 810 CABLE SET ASS'Y BATTERY OWNER'S MANUAL REMOCON PACKING SHEET PACKING PACKING BOX CARTON OPTIONAL PARTS...
  • Page 25 SECTION 3 ELECTRICAL CONTENTS ELECTRICAL TROUBLESHOOTING GUIDE ..............3-2 1. Power(SMPS) Circuit.......................3-2 2. µ-com Circuit..........................3-3 3. MPEG Circuit..........................3-6 4. Front Circuit(Digitron & Key) ....................3-7 5. RF/Servo Circuit ........................3-8 BLOCK DIAGRAMS ........................3-12 1. Overall Block Diagram ......................3-12 2. Power (SMPS) Block Diagram....................3-13 3.

  • Page 26: Electrical Troubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) Circuit No 5V_D No FLD or 5V_A . Is 5.2VA section working? Is 5.2VA section working? (Is the POWER CTL at Pin6 High/low?) Is oscillation present at the Are D109, L103 open? Base of Q108? No 5.2VA.

  • Page 27: Μ-Com Circuit

    2. µ-COM Circuit A. No Power POWER ON Do “Hello” appear at FLD? Is P3901 Does Logo appear connected normally? on the screen? Reconnect it. Check power. (Refer to power) If power is normal Is P3901 Pin 8, 9, 18 normal? Refer to Front Part The waveform Is oscillation of...
  • Page 28 B. Audio abnormal C. Video abnormal AUDIO ABNORMAL VIDEO ABNORMAL Check Audio jack. Check Video jack. YES (If OK) YES (If OK) Refer to Audio part. Refer to Video part. YES (If OK) YES (If OK) Refer to Decoder part. Refer to PANTERA part.
  • Page 29 E. Picture abnormal PICTURE ABNORMAL Check the disc. Refer to Servo part If OK Check DSP YES (If OK) Check PANTERA YES (If OK) Replace B/D F. Disc Error DISC ERROR Check Disc YES (If OK) Refer to Servo part YES (If OK) Replace B/D...
  • Page 30 3. PANTERA Circuit Power is on Does TOSHIBA Logo appear Check power & clock. on the screen? Does the Check CD/DVD DSP output moving picture of the DVD Disc Is PANTERA play on the screen data signal normal? signal. normally? Check CD/DVD DSP output Is error signal normal? signal.

  • Page 31: Front Circuit(Digitron & Key)

    4. Front Circuit (Digitron & key) START Power on. Is oscillation of Check Power. LED ON? X901 normal? Check waveform Is Digitron on normally? Replace IC902. of IC901 Pin 6. Do all the Is waveform of IC901 Check waveform buttons work Pin 40 normal? of IC901 Pin 22.

  • Page 32: Rf/Servo Circuit

    5. RF/Servo Circuit CHECK POINT(General) Does signal goes "High" to IC201 Pin194 when the power is on? Does signal pulse Check "2.PANTERA Part". input to IC201 Pins 58, 59 when the power is on? Does Does Replace X201 or IC206 TTL pulse output to 33.8688MHz clock input (30MHz clock defect)
  • Page 33 No disc Power on Check loading Part. Push Pick-up to inner track to Does tray open or close? the end by hand. Does DECK assembly is defective. PMD03 Pin 6 change (Limit sw) high to low? Pressing the open/close key repeatedly, check the voltage of IC2M1 check PANTERA Part.
  • Page 34 DISC IN OPEN/CLOSE Fig.3. FOCUS ERROR waveform Check Check IC2A1 Pin 11,12,13,14 the focus error moving the FOCUS ON? lens up and down. in DVD Mode (IC2A1 Pin 42) IC201 no output : Pick-up is defective. Does the TTL level change at IC201 Replace IC201.
  • Page 35 CHECK A Fig.5. RF waveform Check RF Eye-Pattern. No signal: Pick-up is defective Check IC2A1 Pins 5, 6, 7, 8. RF : 1.5-1.6V(IC2A1 Pin 57) Does the sawtooth waveform emit See the eye-pattern vivid? Does the 1.6V emit? Replace IC2A1. at IC2A1 Pin 41? Replace IC201.

  • Page 36: Block Diagrams

    BLOCK DIAGRAMS 1. Overall Block Diagram , PAL_SW , AUTO_SW , MIC_ON DAC_RST PWEO /FLASH_CS , /RD /SRST PSENB CPLD SBADD , MIRR,TZC,PI,TE FE,DFECT_IN XLAT , E_STI , E_ENB , E_DR CPLD SPINDLE FOCUS,TRACKING,SLED LOADING DECK M ECHANI SM 3-12...

  • Page 37: Power(Smps) Block Diagram

    2. Power(SMPS) Block Diagram TRANS SWI TCHI NG TR RECTI FI ER L I NE FI L TER 3-13...

  • Page 38: Rf/Cd Dsp/Dvd Dsp/Dvd Servo Block Diagram

    3. RF/CD DSP/DVD DSP/DVD SERVO Block Diagram ICDATA[00:15] ICADDR[0:8] 3-14...

  • Page 39: Audio Block Diagram

    4. Audio Block Diagram 3-15...

  • Page 40: Mpeg Block Diagram

    5. MPEG Block Diagram AD[ 00 : 19 ] 3-16...
  • Page 41 © NAD 2001 T571C T571AH DVD VIDEO PLAYER NAD ELECTRONICS INTERNATIONAL TORONTO...

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