Nad T 571 C Service Manual
This is the 41 pages manual for Nad T 571 C Service Manual.
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Extracted text from Nad T 571 C Service Manual (Ocr-read)
Page 1
NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. 470µF/2.3V '01. 09. 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 2
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
Page 8
3-31 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 21
2-2 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. Several kinds of screws are used and some of them need special cautions. That is, take care of the tapping screws securing molded parts and fine 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 PanelStopper 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. 2-2Fig. 2-3 3. Front Panel 1. Eject the disc tray. (See Fig. 2-2) 2. Remove the tray door. (See Fig. 2-2) 3. Pull the front panel toward you while pressing 5 stoppers to disengage, and remove the front panel. (See Fig. 2-3) 2. Tray Door 1. Eject the disc tray. 2. Lift up the tray door in the direction of the arrow.
Page 40
3-16 5. MPEG Block Diagram IC501 PANTERA -2 IC301 XC9572VL CPLD I/O PORT 72 IC304 SDRAM 16/32BIT 64M IC502 93C46 EEPROM IC3F1 FLASH MEMORY IC302/IC303 LATCH AD[0:7] 8 DSP I/F DVD[0:7] 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 S C L K ,S D A T A 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