Kenwood TH-D72A Service Manual page 77

P
TX-RX UNIT (X57-784X-XX) (C/3) : TX-RX SECTION
33CRF
+B
BPFA R10
10k
R3
0
RF SWITCH
D6
HSC277
45RUA
APC&BPFB
BPFA
APC&BPFB
LDB
Q
SCHEMATIC DIAGRAM
1ST MIXER
Q2
3SK294-FP
4.5V
2.2V
C60
1000p
C34
2p
C54
L16 C48
2.2V
82n
1000p
2p
R11
10k
1ST MIXER
Q4
3SK294-FP
4.5V 2.2V
C63
R4
0 1000p
C29
2p
C50 2.2V
C47
L13
82n
3p 1000p
TH2
NCP18XH103J0S
R12
10k
1ST MIXER
Q3
3SK318
4.5V
1.6V
R6
0
C38
C30
R18
0 3p
470p
TH1
R8
10k
Q1
1.6V
4.5V
3SK318
C55
R9
0
470p
Q1
1ST MIXER
1.4V
C31
R20 C25
0 2p
470p
R
TH-D72A/D72E
L25
L30
12n 390n
D12,13
BPF TUNING
L28 L32
12n 390n
D14,15
BPF TUNING
L24
C64
220n
12p
1.4V
D10,11 D18,19
BPF TUNING
BPF TUNING
L23
220n
D8,9 D16,17
BPF TUNING BPF TUNING
S
Q7
RF AMP
2.7V
C111
C89
1000p 1000p
L38
Q7 3SK294-FP
4.4V
1.6V
15n
D24,25
BPF TUNING
Q8
RF AMP
2.7V
C94
L40 1000p Q8
3SK294-FP
4.4V
15n
D26,27
BPF TUNING
3.8V
L34
C84
R135
270n 470p 0
Q6 1.9V
3SK318
4.4V
D22,23
BPF TUNING
3.0V
C82
L33 R128 C105
270n
4.7
470p 470p
Q5 1.6V
3SK318
4.4V
Q5
RF AMP
D20,21
BPF TUNING
X57-784 (C/3) 4/8
T
33CRF
+B
BPFA
BPFB
C113
1000p
1.5V
BPFA
C107
470p
Q6
RF AMP
BPFB
LDB
77