NAD CI 940 - Page 11

2.DISPLAY & POWERKEY BOARD
13
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
12
S901
PUSHBUTTON
R901
10K
2
1
3
4
D902
BL-BUBJFB52C4V-1
C902
100nF
+
C901
1000uF
+5VD
POWER
/10V
TO MA IN BOARD P801B
MOSI/P1.5
1
MISO/P1.6
2
SCL K /P1.7
3
P4.7/RST
4
RX D/P3.0
5
SCL K /CCP1/P4.3
6
TX D/P3.1
7
INT0/P3.2
8
INT1/P3.3
9
CL K OUT0/TO/P3.4
10
CL K OUT1/T1/P3.5
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/P2.5
23
A 14/P2.6
24
A 15/P2.7
25
NA /P4.4
26
A L E/P4.5
27
P4.1/ECI/ M OSI
28
EX _L V D/P4.6/RST2
29
A D7/P0.7
30
A D6/P0.6
31
A D5/P0.5
32
A D4/P0.4
33
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
EC
Q901
C1015
+
C905
10uF
R902
10K
B
EC
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
+5VD
I
G
O
Q908
DTA114EKA
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
GO
Q906
DTA114EKA
I
G
O
Q907
DTA114EKA
+5VD
R912 1K
1
3
2
4
J901
CON4
DGND
RXD
TXD
+5VD
RST
I
G O
Q911
DTA114EKA
R916 1K
C
GR
D904
DUAL LED
I
G
O
Q910
DTA114EKA
R917 1K
+5 V D
1
2
X901
11.0592MHZ
C903 22pF
C904 22pF
FIRMWARE 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
+5VD
L901
742792662
C909
0.1uF
C908
0.1uF