Kenwood NX-720 Service Manual page 75

AO
TX-RX UNIT (X57-8230-1X)
THP1
R:0.03V
T:3.22V
Drive:2.6dBm
C101 L130 R103 C104
56n
0
1000p 1000p
DC Switch(50C)
Q106
EMD5
B-BUS
4.61V
R249
4.7k
4.60V
.
LNA
C251
R259
Q202
0
5p NESG240034
SP+
SP-
MIC
ME
B-BUS
POWER
AP
SCHEMATIC DIAGRAM
25℃ : 2.6V .
L105
L104
33n
L106
C119 C121 39n (-92)
27p 6p
TX Drive AMP
Q102
2SC3357-A
L103
Over Voltage
Protection
80T
Transient
Voltage
.
limiter
DA3S101F
R:0.0V
T(25W):2.0V
T(5W):1.5V
C254
L221
5.6n
12p
1.36V
f L:2.50V
fC:3.58V
fH:5.21V
AQ
NX-720(G)/720
TX Power Module
IC102
RA60H1317M1A
R:13.2V
T:12.8V(25W)
T:13.0V(5W)
. 15dBm
R122
.
. (36dBm:5W)
22
C136
R123 L115
22 5T
470p
R:0.0V
T(25W):2.9V
T( 5W ):2.5V
3216
+B
80T
.
R138
.
10k
C145
.
OP AMP(APC)
0.1u
IC103
D102
NJM12904RB1
. 1
MP
R130
. 2
- +
27k
R131
3
+
10k
4
.
C155
DC Switch
.
(H/L Power)
.
Q105
FK330301
R137 100k
R:(H:0.0V/L:3.3V)
T(25W):0.0V
T(5W):3.3V
C258 C262
15p 1000p
AR
CN10 CN11
CN14
C15
CN12 CN13
.
D110
L407CDB
D110,111
C177
Antenna Switch
.
100p
D111
L407CDB
C178
100p
R:0.0V
T:1.6V
SideA 3216
R:0.0V
R:0.0V
T:7.8V
T:7.8V
D112-114
Over DC
Antenna Switch
Supply Protection
8
R:0.0V
T(25W):2.1V
7
T(5W):0.8V
.
-
6
R149
5
10k
470p
.
R141
33k
R:0V
C233 C231
T:0.79V
6p 6p
L232 L233
39n 39n
X57-823 9/10
AS
L116
3216
25℃ : 2.6V
SP+
SP-
MIC
ME
B-BUS
POWER
75