NAD C427 - Circuit Diagrams; Main Board Circuit Diagram

C 6 0 8
1N 2
C 6 16
1N 2
R 6 0 7
4 7 R J
R 6 2 3
4 7 R J
C 6 0 9
2 2 0 P
C 6 17
2 2 0 P
L
R
chassis3
1
3
2
K603A
JRC-27F/012-S
R 6 0 6
4 7 0 R
R 6 2 2
4 7 0 R
A G N D
J601A
J601B
+12V A
A G N D
C669
3 3 U /2 5 V
C668
3 3 U /2 5 V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
P601
1.0-9-17PW B
R D S_D AT A
R D S_C LK
ST ER E O
PL L_DO
PL L_C E
TUN ER D
PL L_C LK
PL L_DI
D G N D
A G N D
+12V A
A G N D
C644
10 0 N
C646
2 2 0 U /2 5 V
C645
10 0 N
C674 47nF
R677
2K2
IR B
R678
10k
232G N D
R676
1K
1
2
3
4
5
6
7
8
9
11
10
J608
D Connector 9
/EN
1
C1+
2
V +
3
C1-
4
C2+
5
C2-
6
V -
7
RIN
8
RO U T
9
/INV
10
D IN
11
FCO N
12
D O U T
13
G N D
14
V CC
15
/FCO FF
16
U 617
M A X 3221
C681
100N
C682
100N
C690
100N
C691
100N
232G N D
C686
100N
3V 3S
232G N D
232G N D
R683
330R
R685
330R
R232_RX
R232_TX
C685
10U /10V ,
R679
10R
TP S A 106M 010R 0900
C687
22N
R680
10R
D 604
1SS352
D 605
1SS352
232G N D
D G N D
R684
100R
C _M U T E
C688
22N
R681
10R
D 606
1SS352
D 607
1SS352
A G N D
ch assis3
R649
470R
R648
470R
FM /A M _RO
FM /A M _LO
R654
4k7
R652
0R
Q602
2SC1815
C649
10N
D602
1N4148
C652
100P
A G N D
+12V A
4
6
5
K603B
3V 3S
D G N D
3V 3S
C 6 5 9
100N
Y 6 0 1
18.432 MHz
C 6 6 7
20P
C 6 6 6
20P
D G N D
R 6 7 0
100K
dgnd
C 6 6 0
100N
3V 3S
1
2
J 6 0 4
CO N 2
R 6 6 7
10R
R 6 7 5
1M EG
C 6 5 8
22U F/16V
P102
57
P9 1
1
P9 0
2
C N V SS
3
P8 7/X C IN
4
P8 6/X C O U T
5
R E SE T
6
X O U T
7
V SS
8
X IN
9
V C C
10
P8 5/N M I
11
P8 4/IN T 2
12
P8 3/IN T 1
13
P8 2/IN T 0
14
P8 1
15
P8 0
16
P77
17
P76
18
P75
19
P74
20
P73
21
P72
22
RX D 2/P71
23
TX D 2/P70
24
TX D 1/P67
25
RX D 1/P66
26
P65
27
P64
28
P33
29
SO 3/P32
30
SI3/P31
31
CLK 3
32
T X D 0/P6 3
33
R X D 0/P6 2
34
C L K 0/P61
35
P6 0
36
P2 7
37
P2 6
38
P2 5
39
P2 4
40
P2 3
41
P2 2
42
SC L /P21
43
SD A /P20
44
P1 7
45
P1 6
46
P1 5
47
P0 3
48
P02
49
P01
50
P00
51
P107
52
P106
53
P105
54
P104
55
P103
56
P101
58
A V SS
59
P100
60
V REF
61
A V CC
62
P93
63
P92
64
U 6 11
M30281F A HP
RESET
1
G N D
2
RESET
3
V D D
5
M R
4
U 6 14
TP S 3825
D G N D
R 6 6 2
47K
D G N D
CLK 1
BU SY
R 6 7 3
33R
CN V ss
CE
RESET
D G N D
3V 3S
R 6 6 8
0R
1
2
J 6 0 3
CO N 2
R 6 7 2
47K
3V 3S
R232_RX
R232_TX
3V 3S
D G N D
1 2
3 4
5 6
7 8
9 10
11 12
13 14
J 6 0 6
HE A D E R 7X2 2.54 pitch
CLK 1
BU SY
CN V ss
CE
RESET
R232_RX
R232_TX
R 6 6 3 A
120R
R 6 6 3 B
120R
R 6 6 4 A
120R
R 6 6 4 B
120R
K E Y _ST B
SC L SD A
K EY _M ISO
IRF
IRB
A 0
1
A 1
2
A 2
3
V ss
4
SD A
5
SCL
6
W P
7
V dd
8
U 6 12
24LC 16
D G N D
3V 3S
C 6 5 7
100N
SCL
SD A
D G N D
R 6 6 4 C
120R
R 650B
120R
R 650C
120R
R 650D
120R
R 650A
120R
ST B Y
D G N D
LED _B
FPCLK a
FPM O SIa
V FM ISO
K EY M ISO a
V FSTBa
K EY STBa
IRFa
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
J602
To FPP Board
8V D
D G N D
E N C A a
E N C B a
LED _B
1G
1
A 1
2
1Y 1
18
A 2
4
1Y 2
16
A 3
6
1Y 3
14
A 4
8
1Y 4
12
V C C
20
G N D
10
2G
19
B1
11
2Y 1
9
B2
13
2Y 2
7
B3
15
2Y 3
5
B4
17
2Y 4
3
U610
74LCX244
D G N D
C650
100n
D G N D
D G N D
R 6 5 9 B
120R
R 6 5 9 C
120R
R 6 5 9 D
120R
R 6 5 9 A
120R
D G N D
FPM O SI
FPCLK
V STB
K EY _STB
R 6 5 7 B
120R
R 6 5 7 C
120R
R 6 5 7 D
120R
R 6 5 7 A
120R
IRF
E N C A
E N C B
K EY _M ISO
E N CA
E N CB
V FM ISO
FPCLK
FPM O SI
V ST B
V FM ISO
A 0
1
G N D
2
A 1
3
Y
4
V cc
5
S
6
U 609
N C7SZ157
D G N D
M ISO
Sel
3V 3S
C647
100N
D G N D
3V 3S
3V 3S
5
1
4
J 6 0 5 A
S C J 3 5 1-D S S W
C 6 6 5
10 0 nZ
R 6 7 4
3 3 K J
232G N D
trig i
TRIG
R 6 7 1
10 0 K J
3V 3S
b
e c
Q 6 0 4
D T C 114
232G N D
TRIG
ST ER E O
PL L_DO
PL L_C E
TUN ER D
PL L_C LK
PL L_DI
R 6 6 5 A
120R
R 6 6 5 B
120R
R 6 6 5 C
120R
R 6 6 5 D
120R
R 6 6 6
47K
R 6 6 9
47K
3V 3S
R D S_D AT A
R D S_C LK
M U TE
R 655 120R
C689
22N
R682
10R
A G N D
D G N D
+12V A
3V 3S
8V D
D G N D
D G N D
G
1
O U T
2
IN
3
O
4
U613
AMS1117-3.3
D G N D
C654
100N
C656
3 3 U /2 5 V
C653
100N
C655
3 3 U /2 5 V
+5V S
+5V S
D G N D
Q 6 0 3
DT C 114
D G N D
STBY
25
21
J 6 0 5 B
S C J 3 5 1-D S S W
232G N D
7
8
K603C
JRC-27F/012-S
C683
EM I100p
C684
EM I100p
D G N D
R 6 2
10K
R 6 1
10K
3V 3S
R 6 4
10K
E N C _E nter
EN C_Enter
D G N D
8V D
R 14 3
1K
TRIG_D EC
Q 6 0 0 1
D T C 114
a1
1
gnd
2
a2
3
y2
4
vcc
5
y1
6
U6001
NC7WZ17
C1011
100n
3V 3S232G N D
D 6 0 3
1S S 3 5 2
3V 3S
R 14 0
2 K
R 14 1
2 0 K
TRIGB
V FD _BU SY a
V FD _B U SY a T R IG B
3V 3S
232G N D
C_M U TE
Q 1010
2SA 1015
Q1011
2SC1815
R1352
12K
R1345
4K7
+12V A
D 1054
BA T54S
R1347
47K
C1443
10 0 U /2 5 V
C1444
4 7 U /2 5 V
A G N D
+12V A
R1348
4k7
Q1007
DTC114EKA
D G N D
Q1008
DTC114EKA
D G N D
R1355
10K
3V 3S
M U TE
LED _A
LED _A
A
A
K
K
D 119
M M 3Z4V 7T1G
R 6 8 6
120R
R 6 8 7
120R
1
2
3
4
5
6
7
8
9
P602
TO PSU board
R690
100K
R691
100K
A G N D
C 6 9 2
10 0 P
C 6 9 3
10 0 P
R 6 6 3 C
120R
C695
100N
C 6 9 4
22U F/16V
D G N D
R692
0
C696
N.I.
R695
0
R694
220
R693
220
D G N D
8V D
C1000
N .I.
C1001
N .I.
C1002
N .I.
R1000
0R
R1001
0R
R1002
0R
D G N D
X M 300
H O LE
X M 301
H O LE
X M 302
H O LE
D G N D A G N D
B L E N D
B L E N D
R698
3K9
4
6
5
K601B
JRC-27F/012-S
R696
4k7
R697
0R
Q601
2SC1815
C697
10N
D601
1N4148
C698
100P
A G N D
+12V A
78
K601C
JRC-27F/012-S
CIRCUIT DIAGRAMS
1.MAIN BOARD VM2.0
1010
8