Kenwood NX-820G Quick Start Manual page 75

AO
TX-RX UNIT (X57-8240-1X)
THP1
TX Pre-Drive AMP
Q1 01
C 109 R 1 0 3
2S C335 6- A ( R24)
6p
L1 21
1 5n
DC Switch(50C)
Q 10 6
E MD5
B-BUS
.
C2 5 1
R2 18
0
S P -
S P +
M I C
ME
B-BUS
AP
SCHEMATIC DIAGRAM
E2 3 - 1 2 7 8 - 0 5
C N 1 4 C N1 0
C N 1 5 C N1 2
C 1 0 4 TX Drive AMP
Q1 0 2
22
47 0 p
2S C33 5 7- A C 1 1 9 R 1 8 8
1 2
6 p
1.4dBm
L 1 0 3
80T
Transient
DA3S101F
Voltage limiter
4.78V
C N 2 0 5
LNA
4.77V
Q 2 0 2
NE SG2 4 00 34
R2 9 0 C 2 5 4
C2 63
7 p
1 0 p 0 4 p
1.53V
D204,206
RX BPF Tune
fL : 1.52V
fC : 5.41V
fH : 8.92V
AQ
NX-820(G)/820
2.6V:25℃
TX Power Module
I C1 0 2
TH1
RA6 0 H4 0 47 1 10 1
CN 1 1
.
13dBm
R1 2 2
.
.
12
L 1 0 6
C1 3 6
R1 2 3
1 8 n
1 2
47 0 p
+B
80T
.
.
R 13 8 1 0 k
.
C1 45
.
I C 10 3
0 . 1u
NJM12904RB1
D1 0 2
.
1
MP
R 13 0
.
2
- +
15 k
R 13 1
3
1 0k
4 GND
R : 0.0V .
T(25W) : 1.9V
C155
T(5W) : 1.5V
OP AMP(APC)
R:0.0V
T(25W):0.0V
T(5W)3.3V
.
R 1 3 7
.
1 0 0k
Q1 05
FK 33 0 3 01
CN 20 3
C N2 04 CN 20 6
C 2 9 1 C 2 89 C2 9 7 C 2 9 6
2 p 1 00 p 1 0 0p 1 8 p
AR
D110,111
Antenna Switch
R:13.2V
D1 1 0
T(25W):12.7V
T(5W):13.0V
L 40 7 CD B
.
(32dBm:Lo-Pow)
D1 11
L 1 15
L4 0 7C DB
R:0.0V
T(25W):2.8V
T(5W):2.3V
R:0.0V
T:1.6V
R:0.0V
T:7.8V
R:0.0V
T:7.8V
TH2
V+
8
7
.
+ -
6
R1 49
5
10 k
470p
.
R 14 1
D112-114
3 3 k
Over DC
Supply Protection
DC Switch
Antenna Switch
(H/L Power)
B-BUS
R: 0V
T:0.80V
L 2 2 8
2 .7 n
AS
.
C1 7 7
1 0 0 p
2.6V:25℃
SP -
S P +
M I C
M E
B-BUS
75
X57-824 9/10