Kenwood NX-820 Service Manual page 110

Z
NX-820
B-BUS
.
C622
.
0.01u
IC512
TC7WBD125AFK
1 oE1
VCC 8
I2CCK 2 A1
o E 2 7
I2CDT 3 B2
B1 6
4 GND
A 2 5
Leval Shift
/INT15P
S P 2
50MC
F1CNT
F34CNT
F2CNT
SB
50MC
DATO
DEO_AFO
D AT AI
33M
1
2
CTS0 3
4
/IGN
RXD0
D 504
RXD0
DB 2 S3 10
Reverse
Current Provention
50M
Dual BUS Buffer(FNC3/FUNC1)
TC7W T126 FU - F
1 G 1
RTS0
2 A 1
3 Y2
4 GND
T XD0
CN705
TXD0
CN 707
S P-
S P+
M IC
M E
B-BUS
110
X57-824 6/10
AA
SCHEMATIC DIAGRAM / 原理图
.
CP703
100kX4
.
R 63 6
4 7 0k
19 SCL
Io1.2
1 2
20 SDA
Io1.1
1 1
.
I/O Expander
21
VDD Io1.0
I C 51 5 1 0
22 IN T
PCA 95 3 5B S .
VSS
9
2 3 A 1 C P7 0 5
Io0.7
8
2 4 A 2
Io0.6
7
100kX2
.
CP704
.
100kX4
C P7 0 6
100kX2
RXD_FNC2
IC514
TC7 WH 126 FU- F
7 15
G1
VCC 8
A1
G2 7
Y 2
Y1 6
GND
A2 5
C624
0.01u
Dual BUS Buffer
(FNC2/FUNC4)
F34CNT
50MC
I C5 13
VCC 8
G2 7
RTS_FNC3
Y1 6
A2 5
TXD_FNC1
D512,513
Reverse
Current
Prevention
AB
50C
.
.
11
R6 5 9
0
12
.
R663
.
R 65 8
.
0
1 3
14 R660
10
.
R665
DI_MI2
.
RS-232C Driver
9 R2oUT RXD
R2IN 8 9.9V
TXD
10 T2IN
T2oUT 7
DC Switch(Horn Alert)
11 T1IN
V- 6
12 R1oUT 1 u 25
C628
L TC0 14 TEB FS8
C2- 5
13 R1IN
C2+ 4
14 T1oUT 1 u 25
C 6 2 9
C1- 3
C 6 3 0 1 u 25
15 GND
V+ 2
16 VCC
C1+ 1
9.9V
I C 5 1 6
AD M 2 0 2 EAR N Z
C627
1 u 25
.
R637
.
.
1 k
D 5 1 3
R638
C N7 20
.
DC Switch(IGN)
1 k
D B2 S3 1 0 D_RXD2
D 5 1 2
L TC0 14 TEB FS8
.
Line Protection
DB2 S3 1 0
D 6 0 1
D B2 S3 1 0
AC
TX-RX UNIT (X57-8240-13)
D505-510
Line Protection
5
R6 6 4
R 6 67
FN C1
10 0 C 6 3 4
0
6
1 0 0 p
R 66 8
FNC6
. 4 7 0 C 63 5
9
R 6 6 2
R6 6 9 1 0 0p
FNC2
1 0 0
C 6 3 6
0 .
R 50 6 1 0 0p
5 0 M C
C6 3 7
0
R6 7 0 1 00 p
FNC3
1 0 0
C6 38
1 0 0p
S P 2
C6 39
R 6 7 1 10 0 p
FNC4
1 0 0 C 6 4 0
1 0 0p
R6 34 D ATO
C6 41
10 0
R6 7 2 10 0 p
FN C5
47 0
C 6 42
R6 2 6 1 0 0p
D ATAI
C6 4 3
. 10 0
F5 01
0. 0 22 u SB
C6 4 4
GN D
R666
1 0 0p
6
Q 5 0 2
.
R 64 3
R 65 7 R6 6 1
4 7 k
4.7k
0
MTM981400BF
Q 5 0 3
DC Switch
.
(Horn Alert)
R 64 1
C6 3 2
1 00 0 p
0
.
R674
1M
.
Q 5 0 4
AD
B-BUS
D-Sub15
.
J 50 1
6
1
1 1
7
2
1 2
8
3
1 3
9
4
1 4
10
5
1 5
SP -
S P+
MI C
ME
B-BUS