NAD T 175 Service Manual page 46

MAIN BOARD-2
-1 2 V _ A +1 2 V _ A
+5 V _ K +5 V _ K
R 2 0 5 0 R 2 0 5 1
2 .2 k 2 .2 k
4 0 9 4 (1 )_ C LK _ V O L 4 0 9 4 (1 )_ DA TA _ V O L
E E
B B Q 2 0 0 2
4 0 9 4 (1 )_ C LK 4 0 9 4 (1 )_ DA TA
DTA 1 1 4 E K A
Q 2 0 0 1 C C
DTA 1 1 4 E K A
DG N D DG N D
DS P_ S PI0 _ S O M I_ 5 V
J2 0 1 1 A
To C on n #1 J2 0 1 1 B
1
2 4 0 9 4 (6 )_ S TB
3 4 0 9 4 (5 )_ S TB
1 k
4 4 0 9 4 (1 )_ DA TA R 2 0 5 5
R 2 0 5 6
5 4 0 9 4 (1 )_ C LK
6 V 6 _ O PT
7 DA B _ IN
8 S PI0 _ S IM O _ 5 V
9 DS P_ S PI0 _ S O M I_ 5 V
S PI0 _ C LK _ 5 V
1 0
S PI0 _ S C S _ 5 V
1 1
1 2 S PI0 _ E N A _ 5 V
1 3 IN T_ 5 V
1 4
1 5
1 6 C V B S _ V 6 _ IN
1 7 S _ V 6 _ IN _ Y
1 8 S _ V 6 _ IN _ C
1 9 DG N D_ V
2 0 H P_ L
H P_ R
2 1
A G N D
2 2
2 3
2 4
2 5
2 6
IPO D_ TX D_ 3 V 3
2 7
IPO D_ R X D_ 3 V 3
2 8
A G N D
+5 V _ K +5 V _ K +5 V _ K +5 V _ K
R 2 0 4 6 R 2 0 4 5
1 0 k 1 0 k
J2 0 0 9 A
To C on n #1 J2 0 0 9 B
1 X M _ TX D
2 X M _ R X D
3 1 5 2 0 5 _ DA TA _ A
4 7 8 2 1 1 /PLL_ C E
5 1 5 2 0 5 _ DA TA _ B
6 PLL_ C LK
7 4 0 9 4 (4 )_ S TB
8 S TE R E O
TU N E D
9
PLL_ DO
1 0
1 1 PLL_ DI
1 2
R 2 0 5 4 N .I.
1 3 R DS _ DA TA 1
1 4
1 5 4 0 9 4 (2 )_ S TB
1 6 4 0 9 4 (3 )_ S TB
1 7 PG 1 0 _ S C L
1 8 PG 1 0 _ S DA
1 9 A N T_ R E V
LIN K A C TIV E
2 0
DA B /X M _ TX D
2 1
2 2 DA B /X M _ R X D
2 3 4 0 9 4 (1 )_ C LK _ V O L
4 0 9 4 (1 )_ C LK _ V O L
2 4 4 0 9 4 (1 )_ DA TA _ V O L
4 0 9 4 (1 )_ DA TA _ V O L
2 5 +5 V _ K
2 6 +5 V _ K
2 7 DG N D
2 8 DG N D
DG N D
J2 0 1 6 A
To Tu n er
R DS _ C LK
1
DG N D
2
3 R DS _ DA TA
DG N D
J2 0 0 5 A J2 0 0 6 A J2 0 0 8 A
To F ron t In pu t J2 0 0 5 B To F ron t In pu t J2 0 0 6 B TO F R O N T IN PU T J2 0 0 8 B
+5 V _ V
L2 0 0 1
1 0 u H
A G N D
DG N D_ V
+5 V _ K
R 2 0 4 2
1 0 k
H P_ DE T
M IC _ B IA S
4 0 9 4 (6 )_ S TB
4 0 9 4 (5 )_ S TB
4 0 9 4 (1 )_ DA TA
1 k 4 0 9 4 (1 )_ C LK
S PI0 _ S IM O _ 5 V
S PI0 _ C LK _ 5 V
S PI0 _ S C S _ 5 V
S PI0 _ E N A _ 5 V
IN T_ 5 V
+5 V _ K
DG N D_ V
R 2 0 4 4
4 .7 k
1 5 2 0 5 _ DA TA _ A
7 8 2 1 1 /PLL_ C E
1 5 2 0 5 _ DA TA _ B
PLL_ C LK
4 0 9 4 (4 )_ S TB
S TE R E O
TU N E D
PLL_ DO
PLL_ DI
R DS _ C LK
R DS _ DA TA
4 0 9 4 (2 )_ S TB
4 0 9 4 (3 )_ S TB
PG 1 0 _ S C L
PG 1 0 _ S DA
A N T_ R E V
LIN K A C TIV E
DA B /X M _ TX D
DA B /X M _ R X D
+5 V _ K +5 V _ K
R 2 0 3 5 R 2 0 3 6
2 .2 k 2 .2 k
IPO D_ TX D_ 5 V
C C
B B
IPO D_ TX D_ 3 V 3 Q 2 0 0 8 Q 2 0 0 9
DTC 1 1 4 E K A DTC 1 1 4 E K A
E E
DG N D DG N D
+3 V 3 _ K +3 V 3 _ K
A TM E G A _ R S T
R 2 0 3 7 R 2 0 3 8
2 .2 k 2 .2 k
IPO D_ R X D_ 3 V 3
C C
B Q 2 0 1 0 B Q 2 0 1 1
IPO D_ R X D_ 5 V
DTC 1 1 4 E K A DTC 1 1 4 E K A
E E
C N V S S
DG N D DG N D
M _ R S T
J2 0 0 2 A
To K eyboard J2 0 0 2 B
+5 V _ K+3 9 V A C 4 .8 V 1 A C 4 .8 V 2 +5 V _ K
C 2 0 4 5 C 2 0 4 6
1 0 0 0 u 0 .1 u
1 0 V 5 0 V
8 1
U 2 0 0 2
7 2
6 A T2 4 C 1 6 3
5 4
DG N D
+5 V _ K
DG N D
R 2 0 1 3 4 .7 k
R 2 0 1 4 4 .7 k
U 2 0 0 1
M 3 0 2 8 0 F C H P-U 3
A N T_ R E V
6 1 P0 _ 6
6 2 P0 _ 5
6 3 P0 _ 4
X M _ PW R
6 4 P0 _ 3
6 5 P0 _ 2
7 8 2 1 1 /PLL_ C E
6 6 P0 _ 1
4 0 9 4 (3 )_ S TB
6 7 P0 _ 0
K E Y0 3
6 8 P1 0 _ 7
K E Y0 2 6 9 P1 0 _ 6
K E Y0 1
7 0 P1 0 _ 5
K E Y0 0
7 1 P1 0 _ 4
TR IG _ O U T_ 3
7 2 P1 0 _ 3
TR IG _ O U T_ 2
7 3 P1 0 _ 2
TR IG _ O U T_ 1 7 4 P1 0 _ 1
+5 V _ K
7 5 A V S S
R 2 0 0 5
TR IG _ IN
7 6 P1 0 _ 0
N .I.
7 7 V R E F
7 8 A V C C
R 2 0 0 6
N .I.
S PI0 _ S O M I_ 5 V
7 9 P9 _ 7
S PI0 _ S IM O _ 5 V 8 0 P9 _ 6
DG N D
M C U
+5 V _ K +5 V _ K +5 V _ K +5 V _ K
C 2 0 5 0 C 2 0 4 9
J2 0 1 2 A
0 .1 u 4 7 u
R 2 0 0 2
F A ILS A F E 5 0 V 1 6 V
1 0 k
1
2
O U T
U 2 0 0 6
C 2 0 4 8 C 2 0 4 7 J2 0 1 4 A
A M E 8 5 3 0
4 7 u
1
1 6 V
5 1
R 2 0 1 2 V C C PW
2 G N D
0
3 4
X 2 0 0 1
2
N .I.
R 2 0 0 1 C 2 0 5 3 C 2 0 5 2
1 0 0 k 2 2 u
0 .1 u
1 6 V 5 0 V
DG N D DG N D DG N D DG N D DG N D DG N D DG N D DG N D
X 2 0 0 1 A
2 0 M H z
+5 V _ K +5 V _ K +5 V _ K
O U T
C 2 0 5 4 C 2 0 5 5 C 2 0 5 6 C 2 0 5 7 C 2 0 5 8 C 2 0 5 9
G N D
4 7 u 0 .1 u 4 7 u 0 .1 u 4 7 u 0 .1 u
1 6 V 1 6 V 1 6 V
DG N D DG N D DG N D DG N D DG N D
O S C _ C LK
DG N D DG N D
P8 0
J2 0 1 7 A
IS P H eader
DS P_ S PI0 _ S O M I_ 5 V
3 2 9 1
PD2 PD5 A TM E G A _ S O M I
2
+5 V _ K
3 1 1 0
PD1 PD6
3
S PI0 _ C LK _ 5 V
3 0 1 1 4
PD0 U 2 0 1 4 PD7 S PI0 _ S IM O _ 5 V
S PI0 _ S C S _ 5 V
5
R E S E T
2 9 A Tm ega4 8 1 2
PC 6 PB 0
DG N D 6
A TM E G A _ S O M I
2 8 1 3
PC 5 PB 1
2 7 1 4 P8 0
PC 4 PB 2
2 6 1 5
S PI0 _ S IM O _ 5 V
PC 3 PB 3
2 5 1 6
PC 2 PB 4 A TM E G A _ S O M I
R 2 0 3 9 N .I.
S PI0 _ C LK _ 5 V
R 2 0 4 0 N .I.
R 2 0 5 2
0
DG N D DG N D
46
R 2 0 1 5 0
R 2 0 1 6 0
R 2 0 1 5 & R 2 0 1 6
N .I. F O R C E
+5 V _ V +5 .3 V
R 2 0 1 7 & R 2 0 1 8
(+5 V for C E )
0 O H M F O R C E
R 2 0 1 7 N .I.
DA B /X M _ TX D
DA B /X M _ R X D
R 2 0 1 8 N .I.
A U TO /O F F
2 3 2 _ TX D
2 3 2 _ R X D
DA B /X M _ TX D
4 0
P6 _ 3
V F D_ C LK X M _ PW R
3 9
P3 _ 0
3 8 V F D_ C S TR IG _ IN
P3 _ 1
TR IG _ O U T_ 1
V F D_ DA TA TR IG _ O U T_ 2
3 7
P3 _ 2
TR IG _ O U T_ 3
4 0 9 4 _ S TB
3 6
P3 _ 3
PLL_ C LK
3 5
P3 _ 4
IR _ R
S TE R E O
3 4
P3 _ 5
TU N E D
P3 _ 6 3 3
3 2 PLL_ DO
P3 _ 7
R TS 1
3 1
P6 _ 4
C LK 1
3 0
P6 _ 5
2 3 2 _ R X D
2 9
P6 _ 6
2 3 2 _ TX D
2 8
P6 _ 7 DG N D
2 7 PG 1 0 _ S DA
P7 _ 0
PG 1 0 _ S C L
2 6
P7 _ 1
2 5
P7 _ 2
2 4
P7 _ 3
H P_ DE T
2 3
P7 _ 4 +5 V _ K +5 V _ K +5 V _ K
2 2
P7 _ 5 PO W E R _ O N
2 1 M IC _ B IA S
P7 _ 6
R 2 0 4 3 R 2 0 0 4
1 0 k 1 0 k
J2 0 1 3 A
JTA G C on n ector
+5 V _ K 1
R TS 1
R TS 1 2
C LK 1
C LK 1 3
2 3 2 _ R X D
2 3 2 _ R X D 4
P8 0 C E
C E 5
6
A TM E G A _ R S T
DG N D 7
R E S E T 8
C N V S S 9
2 3 2 _ TX D
2 3 2 _ TX D 1 0
R 2 0 4 7
1 0 k
+1 3 V
+5 V _ K +5 V _ K DG N D DG N D
R 2 0 0 9 R 2 0 1 0
R 2 0 0 3 1 0 k 0
0
D2 0 0 1
V +
LL4 1 4 8
C 2 0 4 2 R 2 0 1 1
C 2 0 5 1 0 .1 u 1 k
5 0 V 1 2 0 6
1 0 0 0 p
N C
DG N D
DG N D
V +
N C
+5 V _ K
U 2 0 1 5
7 4 H C 0 0
C 2 0 6 1 C 2 0 6 2
4 7 u 0 .1 u
1 1 A 1 4
V C C 1 6 V
+5 V _ K +3 V 3 _ K
2 1 B 1 3
4 B DG N D
U 2 0 1 6
3 1 Y 1 2
4 A
LM 1 1 1 7 - 3 .3
4 2 A 1 1
4 Y IN O U T
5 2 B 1 0
3 B
C 2 0 6 3 C 2 0 6 4 C 2 0 6 5 C 2 0 6 6
6 2 Y 3 A 9 4 7 u 0 .1 u 4 7 u 0 .1 u
1 6 V 1 6 V
7 G N D 8
3 Y S PI0 _ S O M I_ 5 V
DG N D DG N D DG N D DG N D DG N D
DG N D
+1 2 V _ D+5 V _ K
J2 3 0 1 B
TO TR IG G E R J2 3 0 1 A
$ $ $ 3 2 0 8 6 1
$ $ $ 3 2 3 2 4 2
DA B _ IN 3
4
5
6
A U TO /O F F 7
2 3 2 _ TX D 8
2 3 2 _ R X D 9
IR _ O _ 1 1 0
IR _ O _ 2 1 1
X M _ PW R 1 2
IR _ R _ M IX
1 3
TR IG _ IN 1 4
TR IG _ O U T_ 1 1 5
TR IG _ O U T_ 2 1 6
TR IG _ O U T_ 3 1 7
DG N D 1 8
+5 V _ K 1 9
+1 2 V _ D 2 0
IR _ R 2 1
+5 .3 V 2 2
+5 V _ V
2 3
2 4
2 5
2 6
C 2 0 6 7
0 .1 u
5 0 V
+5 V _ K +5 V _ K +5 V _ K
R 2 0 0 8 R 2 0 0 7 C 2 0 4 4 C 2 0 4 3
N .I. 1 0 0 k 1 0 u 0 .1 u
U 2 0 0 5 1 6 V 5 0 V
7 4 H C 1 3 2
DG N D
1 1 A V C C 1 4
+5 V _ K
IR _ F 2 1 B 1 3
IR _ F 4 B
3 1 Y 1 2
4 A
R 2 0 4 10
4 2 A 1 1
4 Y
5 2 B 1 0
3 B
6 2 Y 9
3 A
DG N D 7 G N D 8 IR _ O _ 2
3 Y
DG N D