NAD T571C Manuel utilisateur
SERVICE MANUAL
SERVICE MANUAL
T571C
T571AH
DVD VIDEO PLAYER
T571C
T571AH
DVD VIDEO PLAYER
T571C
T571AH
DVD VIDEO PLAYER
MODELS : T571C/T571AHSERVICE MANUAL
© NAD 2001
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
5
56
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
4
1
6
2
3
1
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
4
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,
RF
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 ]
T
3
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
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 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
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.
3-33 3-34
8. A/V JACK CIRCUIT DIAGRAM (T571AH ONLY)
T571C/T571AH
Component, S-Video out
can,t be changed.
Ce manuel convient aux modèles suivants
1
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