Kenwood NX-700 Service Manual page 84

U
NX-700/700H
TH1
L104
33n
L105
39n
C121
TX
9p
PM DRAIN BIAS
PROTECTION
+B
80T
R126
100k
AUTO
POEWR CONTROL
IC101
NJM2904V-ZB
1 8
V+
7
2
3 6
4 5
GND
C132
470p
R119
10k
2
C282 C287
RX
1000p 15p
VARI-CAP TUNE
14.33V
R273
150C
0
2
1
X57-738X-XX D103 IC102 L107
0-10 K NO RA30H1317M123 NO
0-12 HK L407CDB RA60H13171123 L92-0179-05
84
X57-738 (A/2) 5/16
V
SCHEMATIC DIAGRAM
∗
IC102
ANTENNA
SWITCH
L407CDB
∗
R124
L407CDB
R : 0V
∗
R125 C135
T : 1.60V
470p
(K)
FC-H : 3.80V
FC-L : 2.80V
(HK)
FC-H : 4.57V
FC-L : 4.22V
(K) (HK)
FC-H : 13.12V FC-H : 12.38V
FC-L : 13.41V FC-L : 13.12V
ANTENNA
SWITCH
R140
100k
AUTO
POEWR CONTROL
IC103
NJM2904V-ZB
1
2
R134
∗
R132 100k 3
4
GND
SW
(RF PWER H/L)
C157
Q105 470p
DTC114EE
SW
(RF PWER H/L)
R138
100k
L223
C297
150n
15p
VARI-CAP TUNE
FL : 1.63V
FC : 2.45V
FH : 4.36V
IC205
LMC7101BIM5
1 OUTPUT 5
V-
2
V+
3 4
INPUT+ INPUT-
BUFFER AMP
(BPF TUNE)
R115 R116 R120 R123 R124 R125 R127 R132 R135
47k 22k 47k 270 39 39 270 330k 330k
56k 18k 56k 220 47 47 220 100k 390k
W
∗
D103
L112 L113
D104 5T 5T
C165
120p
POWER
DET
R : 0V
T : 0.8V
8
V+
7
6
∗
R145
5
Q106
2SK1830F
2
5.43V
R302 C335 C311 R304
0.88V
0 150p 1000p 2.2k
0.12V
C315
1000p
Q210
2SC3357-A
LNA
IC206
LMC7101BIM5
1 OUTPUT 5
14.33V
V-
2
V+
3 4
INPUT+ INPUT-
BUFFER AMP
(BPF TUNE)
2
1
R139 R142 R143 R145 R146 C138 C139 C162 C163
100k 820k 82k 100k 82k 3.3u NO 820p NO
9p
120k 390k 100k 47k 120k NO 4.7u NO
X
TX-RX UNIT (X57-738X-XX) (A/2)
L114 L115
5T 5T
R150
0
POWER POWER
DET DET
FC-H : 2.04V
FC-L : 0.70V
TH2
ANTENNA
SWITCH
R305 R322 R347 R341 C316
0 0 0 0 18p
VARI-CAP VARI-CAP
TUNE TUNE
R299
100k
FL : 1.63V
FC : 2.45V
FH : 3.86V
C167 C169 C171 C173 C174 C176 C177 C179 C182
43p 2p 0.5p 47p NO 1.5p 0.5p 39p 22p
27p 6p 0.3p 22p 18p 5p 0.3p 36p 27p
Y
ANT
2
2
2
1
C184 C186 C188
3p 0.5p 18p
6p 0.3p 15p