Kenwood NX-900 Service Manual page 95

BD
TX-RX UNIT (X57-8060-10) (A/2)
C938
L919
R938
100
C982
2p
4.62V
C146
L921
2p
10n
C86
Q420
2SC5108(Y)F
3p
1.86V
RF BUFFER AMP
50R
Fin
R339
R346 R204
22k 47
R213
1k
C330
0.22V
D201
D201
DAN235E
CF
SWITCH
(W/N)
W5K : 0V
W4K : 0V
SWITCH NW : 0.90V
C332
(W/N) DN : 0V
DV : 0.90V
Q201
RT1P141U-T111
W5K : 5mV
SWITCH
W4K : 5mV
(W/N)
NW : 3.29V
DN : 5mV
DV : 3.29V
Q202
RT1N441U-T111
W5K : 2.86V
W4K : 2.86V
NW : 0.26V
DN : 2.86V
DV : 0.26V
2
9
MI1
ME
BE
SCHEMATIC DIAGRAM
C973 C975
2p 3p
C967 C969 C970 C971 L914 L915
2p 1.5p 5p 47p 47p
5.6n 5.6n
C173 C564
2.5p 2p
C107 C160 C163 C167 C168 C182
L450 L451
100p 2p 5p 1.5p 47p 15p
5.1n 5.1n
R : 2.18V
T : 4.21V
T/R
SWITCH
R : 2.86V
T : 0V
R261
4.7k
R : 1.83V R : 4.75V
T : 0V T : 0V
C267
C344
2.5p
Q208
47 100p
R : 1.21V
2SC5636
T : 0V
BUFFER AMP
(LOCAL)
R : 4.89V
L202
560n
R207 R332 C211
330k 0 10p
C208
0.01u
Q203
2SC5636
2nd LOCAL
BUFFER AMP (X3)
WIDE
CF201
L72-1027-05
R343
0.1u 0 C331
IN oUT
CF
SWITCH
0.1u
W5K : 0.90V
(W/N)
W4K : 0.90V
NW : 0V D202
DN : 0.90V DAN235E
DV : 0V
NARROW
CF202
L72-1041-05
R344 C333
IN oUT
0.1u 0 0.1u
BF
C977
1p
D101
T/R
SWITCH
TX PRE-DRIVE AMP
R : 7mV FL : 1.08V
T : 4.91V FH : 1.05V
L152
D101 C151 C152 C648 C153
R152
6.8n
HVC131 5p 47p 4p 6p
33
80T
C215
100p
L204
C220 C222 C223
47n
47p 0.01u 0.01u
C210
0.1u
R210 10
C225 R338 0
0.1u
C217 0.1u
R216 C228 0.1u
0
C218 4.7u
C219 4.7u
C227 82p
10
CD201
11
12
L79-1850-05
R215
3.3k
Q212
EMD9
WIDE/NARROW
SWITCH
2
9
BG
NX-900
FL : 5.97V
FL : 2.04V
FH : 5.60V
FH : 2.02V
C158 R159 C112 C155
4p 12 10p 4p
Q150
2SK3077F
R171
10k
R : 4.94V
IF IC
IC202
TK10931VTL-G
R345 C234
1 24
OSC<B> RFin
0 0.01u
2 23
GND
OSC<E>
C232 0.1u
3 22
COMPo
MIXo
R227 100k
4 21
COMPi
VCC
R223
5 20
NAMPo
AMIFi
270k
C341 R334
6 19
NAMPi
AMIFdecp
1u 0
7 18
AGC
FMIFi
8 17
FMIFdecp1 AGCAMPo
9 16
RFAGCo
FMIFdecp2
15
RSSIo
LIMo
14
QUADi AMSW
R228
22k
13
FMDETo AMDETo
R : 4.98V
R : 1.38V
C230
0.1u
C212 R212
0.1u 0
BUFFER AMP
(2nd IF DET)
X57-806 (A/2) 12/14
BH
FL : 7.60V
FH : 7.55V
TX DRIVE AMP
Q151
RD01MUS1-T113
C116
7p
80T
80T
R237
100k
R : 4.34V
Q204
2SC3356(R23)
1st
IF AMP
R230
1k
R234
10k
R209
10
CF203
L72-1040-05
oUT IN
2
9
MI1
ME
95