Kenwood NX-720 Service Manual page 110

Z
NX-720
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
/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
110
X57-823 6/10
AA
SCHEMATIC DIAGRAM / 原理图
.
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
SB
RS-232C Driver
ADM202EARNZ
IC516
9
R2oUT
10
T2IN
RTS_FNC3
11
T1IN
12
R1oUT
13
R1IN
14
T1oUT
15
GND
50MC 16
VCC
AB AC
D505-510
50C
.
R664
0
5
.
9
R662
0
.
11
R659
0
12
.
R663
.
13
R658
.
0
14 R660
10
.
R665
.
R666
6
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)
Q504
LTC014TEBFS8
C627
1u 25
-9.9V
AD
TX-RX UNIT (X57-8230-11)
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
.
R674
1M
.
J501
6
1
11
7
2
12
8
3
13
9
4
14
10
5
15
SP+
SP-
MIC
ME
POWER