Audio Circuit Diagram - NAD M55 Service Manual
Digital music player
Hide thumbs
Also See for M55:
- Owner's manual (38 pages) ,
- Specifications (4 pages) ,
- Technical bulletin (2 pages)
Table of Contents
Advertisement
7.AUDIO CIRCUIT DIAGRAM
MCLK-DSD
MCLK-DSD
GNDA
MCLK-O
RST#
H_DCLK
H_DBCK
0R
1
8
H_DSAR
2
7
H_DSAL
3
6
H_DSAML
4
5
40
H_DSMR
DSD3
41
DSD4
1
8
42
H_DSALS
DSD5
2
7
43
H_DSARS
DSD6
3
6
44
H_DSAC
DSD7
4
5
45
H_DSASW
DSD8
TP10
46
PDATA1
0R
TP11
47
PDATA2
TP12
48
PDATA3
49
TP13
PDATA4
TP14
50
PDBCK
51
TP15
PLRCK
52
VDD1
+3.3VA
GNDA
EAUX33
DAC_CS
MC
BCK-O
LRCK-O
4
SD0-O
5
3
SD3-O
6
2
7
SD1-O
1
8
SD2-O
+3.3V
0R
VCC33
+3.3V
+3.3V
1
MVO/DSD_CLK
2
GND
3
VDD3.3
4
GND
33R
5
NC
1
8
6
MR ML
TSD3
SDI78/DSD_6
2
7
7
C SW
TSD2
SDI56/DSD_5
3
6
8
TSD1
SDI34/DSD_4
LS RS
4
5
9
FR FL
TSD0
SDI12/DSD_3
10
LRCKI/DSD2
11
TWS
BICK/DSD_1
12
TBCK#
VDD3.3
13
GND
14
NC
15
RST#
RESET
16
PLLB
+3.3V
+3.3V
SDA
SCL
MCLK-DDX
VCC
1
RGB_AV/TV
1
b
RST#
GNDA
VCC
1
1
MMUTE
1
MMUTE
GNDA
+3.3VA
+5.5VA
1
2
1
2
1
2
+3.3VA
1
1
1
1
+5.5VA
GNDA
26
VCOM2
25
VCC7
24
VCC6
23
AGND5
22
VCC5
21
AGND4
20
VCC4
19
AGND3
18
VCC3
17
AGND2
16
VCC2
15
VCC1
14
VCOM1
GNDA
GNDA
1
1
1
1
ALL AUDIO OUT BAD
+3.3V
48
OUT2A
47
OUT2B
46
+3.3V
+3.3V
NC
45
GND
44
VDD3.3
43
OUT3A
42
OUT3B
41
OUT4A
40
OUT4B
39
OUT5A
38
OUT5B
37
NC
36
GND
35
VDD3.3
34
OUT6A
33
OUT6B
DDX8001
+3.3V
MCLK-SIL
1
1
1
b
-12V
VCC
GNDA
1
b
1
1
-12V
VCC33
+12V
GNDA
3-38
+12V
V+
2
1
1
3
V-
-12V
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
6
7
1
5
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
+12V
V+
2
1
1
3
-12V
V-
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
6
7
1
5
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
+12V
V+
2
1
1
3
-12V
V-
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
6
7
1
5
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
+12V
V+
2
1
1
3
-12V
V-
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
6
7
1
5
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
2
1
2
1
GNDA
VCC33
+3.3VA
-12V
+12V
-12V
+12V
-12V
NC
GNDA
GNDA
GNDA
GNDA
GNDA
1
9
8
1
2
VCC
5
6
11
10
1
1
3
4
13
12
SPDIF
1
GNDA
D4
D6
D12
D14
LL34
LL34
LL34
LL34
D5
D7
D13
D15
LL34
LL34
LL34
LL34
GNDA
GNDA
GNDA
GNDA
GNDA
D8
D10
D16
D18
LL34
LL34
LL34
LL34
D9
D11
D17
D19
LL34
LL34
LL34
LL34
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
VCC
VCC
U3
1
14
1A
VCC
2
13
1B
4B
3
12
1Y
4A
4
11
2A
4Y
5
10
2B
3B
6
9
2Y
3A
7
8
GND
3Y
74HC86
VCC
IR IN
+12V
+5.5VA
3
2
12V
VIN
VOUT
4
VOUT
+5.5VA
1
ADJ
GNDA
GNDA
3-39
1
2
3
4
VCC
3
2
1
B108 added
1
2
3
4
GNDA
GNDA
1
2
3
4
GNDA
5
6
7
8
GNDA
9
10
11
12
GNDA
GNDA
VCC
Q5
1
DTC114
b
VCC
NA
b
5V6
100K
Q6
DTC114
VCC
VCC
1
14
a1
vcc
2
13
b1
a4
3
12
y1
b4
4
11
a2
y4
5
10
b2
b3
6
9
y2
a3
7
8
gnd
y3
74HC132N
Advertisement
Chapters
Table of Contents
