Kenwood NX-200 Service Manual page 155

BN
TX-RX UNIT (X57-7360-10) (A/2)
RF FINAL AMP
H : 2.44V
L : 1.92V
RD07MVS1BT122
L108
R171 C130 R146
TX
15n
0 1000p
R : 0V
T : 2.45V
R142
22k
50T
+B
R : 4.94V
T : 3.8mV
R237
4.7k
R : 4.94V
T : 4mV
R : 4.677V
T : 5mV
L206
560n
1st LO
MIXER
R : 0.889V
50R T : 3.2mV
R220 R225
47 680
RX
R307
50R
0
1
2
3
R : 0.308V
T : 1.63V
4
Note : The components marked with a dot (
BO
SCHEMATIC DIAGRAM /
L119
Q106
3T
0
L208 L209
33n 33n
C247 C250
5p 3p
CN200
BPF
R : 2.476V
T : 4.8mV
Q203
3SK318
C316 R241
1000p 0
R : 2.463V
T : 3.9mV
DC AMP for BPF DC AMP for BPF
IC200
TLV2381IDBV TLV2381IDBV
5 1
oUT VDD oUT
2
GND GND
4 3
IN+ IN- IN+
R : 69.9mV
T : 1.633V
•
) are parts of layer 1.
BP
D105
R : 0.5mV
ANTENNA
T : 1.615V
SWITCH
HVC131
L118 L114 D104
C166 C136
4T 5T
56p 1000p
HVC131
R : -35mV
T : 0.808V
50R
REVERSE
PROTECTION
R265
0
C251 R304 R303 C270 R263
6p 0 0 1.5p 0
VARI-CAP VARI-CAP
TUNE TUNE
R311 C362 R274 R302 C298
0 33p 0 0
R : 2.017V
T : 10.5V
VARI-CAP
TUNE
R313
0
IC201
5
VDD
4
IN-
BQ
NX-200
原理图
L109 L110 L113
8T 8T 6T
C142 C146 C180
9p 9p 12p
ANTENNA SWITCH
R280 L223
0 56n
R289
0
R : 4.893V
R : 4.53V T : 15.5mV
RF AMP
T : 7mV
Q204
R : 2.704V
R268
3SK294-FP
T : 14.6mV
68
R : 1.326V
T : 2.65mV
R301 R300 C317 C306
2p 0 0 10p 39p
R : 2.017V
T : 10.5V
VARI-CAP
TUNE
R450
0
X57-736 (A/2) 4/4
BR
1
ANT
2
3
4
5
6
7
155