Nad T 571 AH Service Manual

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3-19 3-20 5 5 6 Spindle Servo Loop RF SIGNAL Focus Servo Loop Tracking Servo LoopSled 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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3-21 3-22 3. DRIVE & RF CIRCUIT DIAGRAM 4 16 23 1 WAVEFORM Spindle Servo Loop Turn Table Loop Focus Servo Loop Tracking Servo LoopSled 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

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2-4 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 BCD

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3-2 ELECTRICAL TROUBLESHOOTING GUIDE No 5V_D or 5V_A . No 5.2VA. Is 5.2VA section working? (Is the POWER CTL at Pin6 High/low?) Is oscillation present at the Base of Q108? Replace Q108. Check D109, C123, R125, R124. 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 YESYES YES YES YES YES A.B. NO NO

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3-10 FOCUS ON? Check the focus error moving the lens up and down. (IC2A1 Pin 42) Does the TTL level change at IC201 Pin 78 and 132 moving the lens? Does the disc turn? IC201 Pin169 is "High"? Is OK the track jump. Does the signal pulse appear at IC2A1 Pins 39, 29? Does the screen appear? 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 defective. DISC IN C. END NO NO NO NONO NONO NO YESYES YES YES YES YESYES YES

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3-12 BLOCK DIAGRAMS 1. Overall Block Diagram M M DISC SPINDLE MOTOR LOADING MOTORDECK M ECH A NI SM CD: A,B, E, F DVD: A,B,C,D, DVD; RF CD: A,B, E, F DVD: A,B,C,D, DVD; RF PICK UP IC205 DRAM 16bit 4M IC201 HY25D801C CD / DVD DSP IC501 PANTERA -II/2E IC901 Upd78032 FROM FL DISPLAY KEY Input REMOCON RECEIVER 5MHz X-TALPb IC301 XC9572VL CPLD I/O PORT 72 IC304 SDRAM 16/32BIT 64M IC502 93C46 EEPROM IC2M1 KA3032 MOTOR DRIVER IC2A1 TA33P3721 RF ICDATA [00:15]ICADD [0:8] LOADING FOCU S,TRA CK I N G,SL EDSPI N D L E M I RR,TZC,PI ,TE FE,D FECT_I NRFO SCLK,SDATA SCOR,SQCK,SQSO XLAT,E_STI ,E_ENB,E_DR RF_XLAT , LDON IC401 PCM1716 DAC XIO1,XIO2 ,XIO10 F_CLK F_OUT PCMCLK SPINDLE_FGMSDATO MDP1 FOK DEFECT DSP_SENSE LOCK E_SOUT ZISENB /XRST D A C_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] PSE N B FL D /FLD_CS FLD_CLK FLD_OUT /FLD_CS COMM_CLK COMM_OUTCPL D EE_CS , EE_CLK , EE _OUT F_IN IC3F1 FLASH ROM F_IN /MRESET 74573 /FLA SH_CS , /RD PW E O LA0 LA1 LA2 LA3 ALE AD[ 04:19] LADD [04:19] MD[00:31] MCLK2 CKE MA[00:10] MA12,13 /CS0 /RAS /CAS /WE DQM0`3 REQP SDCLKI , PSYNC DVD[1:7] DSP_INT SENSE /DSP_CS LRCK DAC-CS AOUT3 L Composi te FILTER YPr SW602 Video SW CVBS/Pr/R , C/Pb/, Y/G Y C L/R -VF AC 240V, 60Hz POWER BOARD -VF-24VA+8V +5.2VA+5V_D+5V_A +12VA +3.3V_M AD[0:7] LADD4~5 , LA0~3 AD[ 00:15] MDP,FDO,TDO,FMO,MON OPEN_SW CLOSE_SW LIMIT_SW CPL D SB A D D , 27MHz X-TAL 33.8688MHz X-TAL +3.3V POWER_CTL /SRST R AMP

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SERVICE MANUAL SERVICE MANUAL T571C T571AH DVD VIDEO PLAYER T571C T571AH DVD VIDEO PLAYER T571C T571AH DVD VIDEO PLAYER MODELS : T571C/T571AH SERVICE MANUAL © NAD 2001 NAD ELECTRONICS INTERNATIONAL TORONTO