Kenwood NX-800 Service Manual page 134

U
NX-800
R126
39
R116 R121 R127
TX
0 0 39
PM DRAIN BIAS
PROTECTION
+B
80T
R132
100k
AUTO
POEWR CONTROL
IC101
TA75W01FUF
1
VCC
2
3
4
VEE
C134
470p
R117
10k
2
R277 R279 C281
0 12 470p
RX
14.33V
R282
150C
0
2
1
134
X57-775 (A/2) 5/16
V
SCHEMATIC DIAGRAM /
IC102
RA55H4047A123 ANTENNA
SWITCH
L407CDB
L407CDB
C136
470p
R : 0V
T : 1.59V
FC-H : 3.63V
FC-L : 3.40V
FC-H : 12.37V
FC-L : 12.83V
ANTENNA
SWITCH
R142
AUTO
POEWR CONTROL
IC103
TA75W01FUF
8 1
7
2
R134 R136
6 330k 100k 3
5 4
VEE
SW
(RF PWER H/L)
Q105
RT1N141U-T111
SW
(RF PWER H/L)
R140
100k
D207-210
VARI-CAP TUNE
C286 C291 C296
7p 10p 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)
W
原理图
D103
C186 L112
120p
D104 1.5T
POWER
DET
R : 0V
T : 0.78V
100k
8
VCC
7
6
R147
5
100k
C158
470p
Q106
2SK1830F
2
8.01V
LNA
R294 C301
3.37V
Q210
0 6p
2SC3357-A
2.62V
C315
10p
IC206
LMC7101BIM5
1 OUTPUT 5
14.33V
V-
2
V+
3 4
INPUT+ INPUT-
BUFFER AMP
(BPF TUNE)
2
1
X
TX-RX UNIT (X57-7752-71) (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 3p
R313 R317
0 0
R303
D212,213
100k FL : 3.70V
VARI-CAP TUNE
FC : 6.16V
FH : 9.21V
Y
ANT
2
2
2
1