NAD T571C Bedienungsanleitung

SERVICE MANUAL

T571C

T571AH

DVD VIDEO PLAYER

T571C

T571AH

DVD VIDEO PLAYER

T571C

T571AH

DVD VIDEO PLAYER

MODELS : T571C/T571AHSERVICE MANUAL

NAD ELECTRONICS INTERNATIONAL

TORONTO

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

3-19 3-20

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

3-21 3-22

3. DRIVE & RF CIRCUIT DIAGRAM

WAVEFORM

Spindle Servo Loop

Turn Table Loop

Focus Servo Loop

Tracking Servo Loop

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

43752 6

WAVEFORM

OPTICAL/COAXITAL 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.

3-25 3-26

• WAVEFORMS

IC2A1 Pin 42, Focus Error

IC2A1 Pin 36, Pi

IC2A1 Pin 41

Tracking Error IC501 Pin 114

Component Y

IC2A1 Pin 41

VBR TRACKING Error

IC2A1 Pin 57,

IC201 Pin 88, SLED Drive(FMO)

IC201 Pin 18, SLED FG

IC2A1 Pin42, Focus Error(in Focus Search)

IC201 Pin 83, Focus Drive(FDO)

IC501 Pin 118, Composite IC501 Pin 112, Chrominance

(Super video out Mode)

Tek Stop : 2.50MS/s 4 Acqs

M20.0µs2 Apr 1999

14:47:27

Glitch Ch1

Ch3 500mV

[T ]

IC501 Pin 114, Luminance

(Super video out Mode)

Tek Stop : 1 00kS/s 3290 Acqs

M 500µsCH1 280/mV

Edge Slope

Type

<Edge>

Source

Ch1

Coupling

Level

280mV

Mode

Holdoff

Ch3 1.00V

[ T ][ T ]

Slope

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 After tracking

servo ON (Play mode)

TURN(+)(-) from Motor Drive

Forward turn

TE/TZC Before tracking

servo ON

TZC/MIRR (Search mode) FG Signal from M/D

(Play mode)

TE/SLD(+) Search mode

(outter &inner) Tray open Tray closed

3-27 3-28

5. MEMORY CIRCUIT DIAGRAM

T571C/T571AH

Program download fail

Digitron abnormal

Not used

Not power on

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

3-29 3-30

6. TIMER & KEY CIRCUIT DIAGRAM

T571C/T571AH

System not

operate

Remocon

not operate

Power not

control

Digitron

abnormal

Digitron

abnormal

3-31 3-32

7. A/V CIRCUIT DIAGRAM

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.

3-33 3-34

8. A/V JACK CIRCUIT DIAGRAM (T571AH ONLY)

T571C/T571AH

Component, S-Video out

can,t be changed.

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