Kenwood NX-411 Service Manual page 85

BD
TX-RX UNIT (X57-8120-10) (A/2)
TH601
CN601
100k
-t
H : 1.16V
Q602
L : 1.10V
RD01MUS1-T113
DRIVE
AMP
50R
50T
7 /APCSW
+B
L814 L815
6.8n 5.6n
C861 C863 C865
1p 2p 4p
50R
R : 1.94V
MIXER (RX)
T : 0.16V
R : 0.76V
IC804
T : 0.20V
CMY210
C858
L811
3p
7.5n
6 1
IF OUT RF IN
5 2
GND GND
4 3
Vdd Lo IN
R : 0.76V
T : 0.25V
R177
0
Note : The components marked with a dot (
BE
FINAL
AMP
H :
Q604
RD07MUS2BT122 L :
H 6.55V :
H : 0.78V
L : 6.91V
L : 0.73V
L621 L607
C654 R664
3.9n 2.2n
3p 0
R646
1k
D604
VOLTAGE
LIMITING
Q605
SSM3K15TE(F)
DC SWITCH
C866
4p
50R
R874
27
L820
L79-1953-05
C870 C874
L817
100p 100p
5 2
R848 5.1n
18
OUT IN
•
) are parts of layer 1.
BF
SCHEMATIC DIAGRAM
C709
L622
100p
39n
R : 0V
T : 1.92V
D605
6.63V
6.90V
HVC131
R663
C687
0
100p
D606
HVC131
D605,606
TX/RX
RF SWITCH
50T
R 0V :
T : 5.02V
R655 R658
150k 4.7k
IC601
NJM12904RB1
C680
1
AoUT
100p
2
A-IN
R653
3
150k
A+IN
4
GND
R652
150k
APC AMP
+B
Q606
RT1N441U-T111
DC SWITCH
R : 4.98V
T : 0.12V
R : 1.51V
C880 L824 R859
T : 0.17V
10n C896
9p 2.7
27p
Q804
R : 0.39V
505CES-TL-E
T : 0V
BUFFER AMP (LNA)
BG
NX-411
R 0V :
T 1.12V :
L615
L79-1468-05
C694 C698 C705
100p 100p 6p
L616
4 1
C702
0.5p
D607,608
TX/RX
RF SWITCH
L610 C701
7.5n
100p
R : 4.97V
T : 0V
R661
100k
Q607
2SC5383-T111
R662 Q607
DC SWITCH
47k
R667
470k
8
V+
Q609
EMD5
7 DC SWITCH
BoUT
6
B-IN
5
B+IN
R666
Q608
2SK1824-A
0
DC SWITCH
L830
L79-1953-05
C909 C897 C899 C901 C908
100p 1.5p 22p 100p 100p
5 2
OUT IN
HSB88AS-E
X57-812 (A/2) 11/11
BH
1
C706
10p
ANT
2
3
4
5
L831
4.7n
D801
PROTECT of
RF POWER
6
7
85