Kenwood NX-200 Service Manual page 93

BN
TX-RX UNIT (X57-8950-12)
FINAL AMP
H : 2.44V
L : 1.92V
RD07MVS1BT122
L108
R171 C130 R146
TX
15n
0 1000p 0
R : 0V
T : 2.45V
R142
22k
50T
+B
IFC
1st LO
IFC
50R
R : 4.94V
T : 3.8mV
R237
4.7k
R : 4.94V
T : 4mV
R : 4.677V
T : 5mV
L206
RX
560n
MIXER
R : 0.889V
T : 3.2mV
R220 R225
47 680
R307
50R
0
33C
DC AMP for BPF
IC200
TLV2381IDBV
1 5
oUT VDD
2
GND
3 4
IN+ IN-
R : 0.308V
T : 1.63V
4
Note : The components marked with a dot (
BO
SCHEMATIC DIAGRAM
L119
Q106
3T
L501
33C
LNA
IC501
NJG1143UA2
1
GND1
R504
2
VCTL
390
R503
C501 3
RFoUT
18 2p
50R
L208 L209
33n 33n
C247 C250
5p 3p
CN200
BPF
R : 2.476V
Q203 T : 4.8mV
3SK318
C316 R241
1000p 0
R : 2.463V
T : 3.9mV
DC AMP for BPF
IC201
TLV2381IDBV
1 5
oUT VDD
2
GND
3 4
IN+ IN-
R : 69.9mV
T : 1.633V
•
) are parts of layer 1.
BP
D105
R : 0.5mV
ANTENNA
T : 1.615V
SWITCH
RN142S
L118 L114 D104
C166 C136
4T 5T
56p 82p
RN142S
R : -35mV
T : 0.808V
REVERSE
PROTECTION
L503
L502
C503
6
RFIN
8.2n
120p
5
GND2
4
VDD
R311 C362 R274 R302 C298
0 33p 0 0 2p
R : 2.017V
T : 10.5V
VARI-CAP
TUNE
L214
R265
0
C251 R304 R303 C270 R263
6p 0 0 1.5p 0
VARI-CAP VARI-CAP
TUNE TUNE
BQ
NX-200(G)
L109 L110 L113 L116
7T 6T 6T 9T
C142 C146 C180
15p 12p
10p
R280 L223
56n
0
ANTENNA SWITCH
C506 C507 C508
3p
1p 6p
CN881
R301 R300 C317 C306
0 0 10p 39p
R : 2.017V
T : 10.5V
VARI-CAP
TUNE
R289
0
R : 4.893V
R : 4.53V T : 15.5mV
RF AMP
T : 7mV
Q204
R268 R : 2.704V
3SK294-FP
T : 14.6mV
68
R : 1.326V
T : 2.65mV
R313
0
R314
0
R453
0
X57-895 4/4
BR
1
ANT
2
3
4
5
6
7
93