Kenwood NX-800H Service Manual page 84

U
NX-800/800H
R126
39
R116 R121 R127
TX
0 0 39
PM DRAIN BIAS
PROTECTION
+B
80T
R132
100k
AUTO
POEWR CONTROL
IC101
NJM2904V-ZB
1
V+
2
3
4
GND
C134
470p
R117
10k
2
R277 R279 C281
RX
0 0 470p
14.33V
R282
150C
0
X57-739X-XX
2
0-10 K
1
0-12 HK
84
X57-739 (A/2) 5/16
V
SCHEMATIC DIAGRAM
∗
IC102
ANTENNA
SWITCH
L407CDB
L407CDB
C136
470p
(K)
R : 0V
FC-H : 3.77V
T : 1.59V
FC-L : 3.34V
(HK)
FC-H : 3.71V
FC-L : 3.37V
(K)
FC-H : 13.01V
FC-L : 13.38V
(HK)
FC-H : 12.80V
FC-L : 13.25V
ANTENNA
SWITCH
R142
AUTO
POEWR CONTROL
IC103
NJM2904V-ZB
8 1
7
2
R136
∗
6 R134 100k 3
5 4
GND
SW
(RF PWER H/L)
Q105
DTC114EE
SW
(RF PWER H/L)
R140
100k
D207-210
VARI-CAP TUNE
C286 C291 C296
7p 7p 7p
FL : 1.60V
FC : 3.69V
FH : 5.64V
IC205
LMC7101BIM5
1 OUTPUT 5
V-
2
V+
3 4
INPUT+ INPUT-
BUFFER AMP
(BPF TUNE)
D103 IC102 L107 R134 R145 R151
NO RA30H4452M123 NO 270k 82k
L407CDB RA55H4452M123 L92-0179-05 220k 39k
W
∗
D103
L112
D104 1.5T
C186
120p
POWER
DET
R : 0V
T : 0.78V
100k
8
V+
7
6
R147
5
100k
C158
470p
Q106
2SK1830F
2
8.01V
LNA
R294 C301
3.37V
Q210
0 10p
2SC3357-A
2.62V
C315
5p
IC206
LMC7101BIM5
1 OUTPUT 5
14.33V
V-
2
V+
3 4
INPUT+ INPUT-
BUFFER AMP
(BPF TUNE)
2
1
C165 C168 C171 C174 C177 C179 C183 C184
120k 1p NO 3p 3p 6p 3p NO 1p
3p 1p 2p 2p 1p
100k NO NO NO
X
TX-RX UNIT (X57-739X-XX) (A/2)
L113 L114
1.5T 1.5T
R152
0
POWER
DET
POWER
DET
FC-H : 2.32V
FC-L : 0.81V
TH2
ANTENNA
SWITCH
C310 C335 C319
33p 12p 2p
R313 R317
0 0
R303
D212,213
100k FL : 3.70V
VARI-CAP TUNE
FC : 6.16V
FH : 9.21V
C185 C187 C189 C190
6p 3p 7p 5p
4p 5p 8p 4p
Y
ANT
2
2
2
1