NAD CI940, Руководство по обслуживанию, Страница: 11 / 36

2.DISPLAY & POWERKEY BOARD
1 3
PROT
BGND
TRIG
SEN DEFEAT
SIG
+5VD
SPA
SPB
STANDBY
Thermal Protect
1
2
3
4
5
6
7
8
9
10
11
P901A
11PIN2.54-A200B
1 2
S901
PUSHBUTTON
R901
10K
2
1
3
4
D902
BL-BUBJFB52C4V-1
C902
100nF
+
C901
1000uF
+5VD
POWER
/10V
T
O
M
A
IN
B
O
A
R
D
P
80
1B
M
O
SI
/P
1.
5
1
M
IS
O
/P
1.
6
2
SC
L
K
/P
1.
7
3
P
4.
7/
R
S
T
4
R
X
D
/P
3.
0
5
SC
L
K
/C
C
P
1/
P
4.
3
6
T
X
D
/P
3.
1
7
IN
T
0/
P
3.
2
8
IN
T
1/
P
3.
3
9
C
L
K
O
U
T
0/
T
O
/P
3.
4
10
C
L
K
O
U
T
1/
T
1/
P
3.
5
1
1
WR/P3.6
12
RD/P3.7
13
XTAL2
14
XTAL1
15
GND
16
SS/P4.0
17
A8/P2.0
18
A9/P2.1
19
A10/P2.2
20
A11/P2.3
21
A12/P2.4
22
A
13
/P
2.
5
2
3
A
14
/P
2.
6
2
4
A
15
/P
2.
7
2
5
N
A
/P
4.
4
2
6
A
L
E
/P
4.
5
2
7
P
4.
1/
E
C
I/
M
O
SI
2
8
E
X
_L
V
D
/P
4.
6/
R
S
T2
2
9
A
D
7/
P0
.7
3
0
A
D
6/
P0
.6
3
1
A
D
5/
P0
.5
3
2
A
D
4/
P0
.4
3
3
AD3/P0.3
34
AD2/P0.2
35
AD1/P0.1
36
AD0/AD0
37
VCC
38
P4.2/CCP0/MISO
39
P1.0/CLKOUT2
40
P1.1
41
P1.2/ECI
42
P1.3/CCP0
43
P1.4/CCP1/SS
44
IC901
STC12C5A 16S2-35C-LQ FP44
B
E
C
Q901
C1015
+
C905
10uF
R902
10K
B
E
C
Q902
C1015
R903
10K
+
C906
10uF
R904
10K
R905
4.7K
R906
4.7K
R907
10K
R913 1K
B
E
C
Q904
C1815
R908 1K
+
C907
10uF
B
E
C
Q903
C1815
+5V D
I
G
O
Q908
DTA 114EK A
R915 1K
C
G R
D903
DUAL LED
I
G
O
Q909
DTA114EKA
+5VD
R909 510
R910 510
R911 510
I
G
O
Q905
DTA114EKA
I
G
O
Q906
DTA114EKA
I
G
O
Q907
DTA114EKA
+5VD
R
91
2
1K
1
3
2
4
J901
CON4
DGND
RXD
TXD
+5VD
R
S
T
I
G
O
Q911
DTA114EKA
R916 1K
C
G R
D904
DUA L LED
I
G
O
Q910
DTA 114EK A
R917 1K
+5 V D
1
2
X 901
11.0592MHZ
C903 22pF
C904 22pF
FI RMWARE UPDATE
1
2
3
4
5
JA20
5pin/2.54
1
2
3
4
5
JA21
5pin/2.54
Power key board
R914
1K
D409
4V7
In put M ute
R918 4.7K
+5V D
L901
742792662
C909
0.1uF
C908
0.1uF