Kenwood NX-720 Service Manual page 72

Z
NX-720(G)/720
✽ 1
X57-823X-XX A801 CN801 C809
0-10 NX-720(G) E YES YES YES
0-11 NX-720 E
NO NO
B-BUS
.
C622
.
0.01u
IC512
TC7WBD125AFK
1 oE1
VCC 8
I2CCK
2 A1
oE2 7
I2CDT 3 B2
B1 6
4 GND
A2 5
Leval Shift
GPSC
/INT15P
DATO
50MC
/IGN
DATAI
SP2
F1CNT
F34CNT
F2CNT
SB
50MC
Dual BUS Buffer
33M
IC514
TC7WH126FU-F
1 G1
VCC
8
2 A1
G2 7
CTS0 3 Y2
Y1 6
4 GND
A2 5
C624
0.01u
D504
RXD0
DB2S310
Reverse Current Prevention
RXD0
Dual BUS Buffer
50M
IC513
TC7WT126FU-F
F34CNT
8
1
G1
VCC
7
2
RTS0 A1
G2
CN707 6
3
Y2
Y1
5
4
GND
A2
CN705
TXD_FNC1
TXD0
SP+
SP-
MIC
ME
B-BUS
72
X57-823 6/10
AA
SCHEMATIC DIAGRAM
C814 C815 C816 C820 C821 C822 C823 C824 C825 C826
YES YES YES YES YES YES YES YES YES
YES
NO NO NO NO NO NO NO NO NO NO NO
.
CP703
. 100kX4
R636 470k
F34CNT
19
SCL Io1.2
12
F2CNT
20
SDA Io1.1
11
.
21 I/O Expander
F1CNT
VDD Io1.0
IC515 10
22
PCA9535BS
.
INT VSS
9
23 CP705
A1 Io0.7
8
24
A2 Io0.6
7
100kX2
.
CP704
.
100kX4
CP706
100kX2
7
RXD_FNC2
RS-232C Driver
ADM202EARNZ
9
R2oUT
10
T2IN
RTS_FNC3
11
T1IN
12
R1oUT
13
R1IN
14
T1oUT
15
GND
50MC 16
VCC
AB
L802 R561 R802 R835 R839 R842 R843 R844 IC801
D801 D802 L801 L805 L806
YES YES YES YES YES YES YES
YES YES YES
NO
NO NO NO NO NO NO NO NO NO
✽ 1
Line Protection
D505-510
50C
.
R664
0
5
.
9
R662
0
.
11
R659
0
12
.
R663
.
13
R658
.
0
14 R660
10
.
R665
SB
.
R666
6
IC516
R657
RXD
4.7k
R2IN
8
Q502
TXD
T2oUT
7
V-
6
C2-
5
C628 1u 25
LTC014TEBFS8
C2+
4
C629 1u 25
C1-
DC Switch(Horn Alert)
3
1u 25
C630
V+
2
C1+
1
9.9V
DC Switch(IGN)
C627
1u 25
-9.9V
AC
YES YES YES YES
NO NO NO NO TX-RX UNIT (X57-8230-1X)
.
R561
GPSDET
0
D
Dual BUS
.
Buffer
IC801
TC7WH126FU-F
A2
5
4
GND
6 Y1
3
Y2
7 G2
2
A1
33A
8 VCC
1
G1
.
R839
10
GPS Module
D801,802
.
.
Over DC . .
L801
Supply Protection
C821
R842 R843
0 0
18p
R667
FNC1
100 C634
R668 100p
FNC6
470 C635
R669 100p
FNC2
100 C636
.
100p
R506
50MC
0
C637
100p
R670
FNC3
100
C638
100p
SP2
C639
100p
R671
FNC4
100
C640
100p
R634
DATO
C641
100
100p
R672
FNC5
470
C642
100p
R626
DATAI
100
. C643
F501
0.022u
C644
100p
.
DC Switch(Horn Alert)
3
R643
R661
47k
0
Q503
MTM981400BF
.
1000p R641
C632 0
1
.
.
Q504
LTC014TEBFS8
R674
1M
AD
.
CN801
.
J501
6
1
11
7
2
12
8
3
13
9
4
14
10
5
15
SP+
SP-
MIC
ME
POWER