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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
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