Kenwood NX-820H Service Manual page 72

Z
NX-820H(G)/820H
✽ 1
X57-823X-XX
0-10 ,0-12 NX-820H(G) K,K2
0-11 ,0-13 NX-820H
B-BUS
C622
0.01u
IC512
TC7WBD125AFK
1 oE1
VCC 8
I2CCK 2 A1
o E 2 7
3 B2
I2CDT
B1 6
4 GND
A2 5
Leval Shift
/INT15P
S P 2
50MC
F1CNT
F34CNT
F2CNT
SB
50MC
D AT O
DEO_AFO
DAT AI
33M
1
2
CTS0 3
4
/IGN
RXD0
D50 4
RXD0
D B 2S 310
Reverse
Current Provention
50M
Dual BUS Buffer(FNC3/FUNC1)
TC 7W T126FU- F
1 G 1
RTS0
2 A 1
3 Y2
4 GND
T XD0
C N 705
TXD0
CN707
S P -
S P +
M I C
M E
B-BUS
72
X57-824 6/10
AA
A801 CN801 C809 C814 C815 C816 C820 C821 C822
YES YES YES YES YES YES
YES
K,K2 NO NO NO NO NO NO NO
CP703
100kX4
R63 6
4 70 k
19 S C L
Io1.2
1 2
20 S D A
Io1.1
1 1
I/O Expander
21
V D D Io1.0
I C51 5 1 0
22 I N T
PC A95 35 BS
VSS
9
23 A 1 C P7 05
Io0.7
8
24 A 2
Io0.6
7
100kX2
CP704
100kX4
C P7 0 6
100kX2
RXD_FNC2
IC514
TC 7 WH 126 FU- F
7 15
G 1
VCC 8
A 1
G2 7
Y 2
Y1 6
GND
A2 5
C624
0.01u
Dual BUS Buffer
(FNC2/FUNC4)
F34CNT
50MC
IC5 13
VCC 8
G2 7
RTS_FNC3
Y 1 6
A2 5
TXD_FNC1
D512,513
Reverse
Current
Prevention
AB
SCHEMATIC DIAGRAM
C823 C824 C825 C826 L802
D801 D802 L801
YES YES YES YES YES YES YES YES YES
YES
NO
NO NO NO NO NO NO NO NO NO
✽ 1
50C
1 1
R6 5 9
0
12
R663
R 65 8
0
1 3
R660
14
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
C628 1 u 25
LTC 01 4 TEBFS 8
C2- 5
13 R1IN
C2+ 4
14 T1oUT C6 2 9 1 u 25
C1- 3
C6 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 NZ
C627
1 u 25
R637
1 k
D 5 1 3 R638
C N 7 2 0
1 k DC Switch(IGN)
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
R561 R802 R835 R839 R842 R843 R844 IC801
L805 L806
YES YES YES YES YES YES YES YES
YES YES
NO NO NO NO NO NO NO NO NO NO
TX-RX UNIT (X57-8240-1X)
CN8 0 2
R561 Dual BUS Buffer
IC 8 01
0
TC7WH126FU-F
D
5 A2
GND 4
6 Y1
Y2 3
7 G2
A1 2
33A 8 VCC
G1 1
0.1u
C826
R 8 39
10
GPS Module
L 80 1
R 8 42 R 84 3
0 0
D505-510
D801,802
Line Protection
Over DC Supply Protection
5
R 6 6 4
R 66 7
FNC1
1 0 0 C6 3 4
0
6
R6 6 8 10 0 p
FNC6
4 70
C6 3 5
9
R6 6 2
R6 6 9 1 00 p
FNC2
10 0 C6 3 6
0
R 5 0 6 1 0 0 p
50 M C
C6 3 7
0
R6 7 0 1 00 p
FNC 3
10 0 C 6 3 8
1 0 0 p
S P 2
C 6 39
1 0 0 p
R 67 1
FNC4
1 00 C6 40
1 00 p
R 63 4
DATO
C6 41
1 0 0
R6 7 2 1 0 0 p
FNC5
4 70 C 64 2
R6 2 6 1 0 0p
DATA I
C6 43
1 00
F50 1
0. 0 22 u
SB
C 6 44
GN D
R666
1 00 p
6
Q 5 0 2
R6 4 3
R 65 7 R6 6 1
4.7k 4 7 k
0
MTM981400BF
Q 5 0 3
DC Switch
(Horn Alert)
R 64 1
C 63 2
1 0 00 p
0
R674
1M
Q 5 0 4
AD
B-BUS
C N 8 0 3
C 82 1
18p
D-Sub15
J 5 01
6
1
1 1
7
2
1 2
8
3
13
9
4
14
1 0
5
15
SP -
S P+
M I C
ME
B-BUS