Kenwood NX-411 Service Manual page 79

Z
TX-RX UNIT (X57-8120-10) (A/2)
5 6 7 8 9 10
1 2 3
VCO_MOD
AMT
/SCSW
11
RXAF
RXEO
RXEI
BEEP
19
OPT9
AI
TONE
11
TONESW
INAMT
19
EXAMT
STSW
OPT6
AO
TXO
11 11 VOX
19
33A
11 19
R36
100k
11 19
C31
47p
R31 R32
18k 120k
C25 R34
0.1u 47k
TXI
C23 R29 C26 R35
DTI
0.1u 100k 0.1u 150k
11
11
AA
5
R18 0
RXAF SMF
C21 0.1u
IC2
TC75S51FE(F)
1
IN+ VDD
2
VSS
C19 R19 R20 3
IN- oUT
1u 56k 56k
OP AMP (AF)
C17 220p
R14
68k
C10 0.1u
C11 0.1u
R11 R15 C16 R17
47k 10k 0.1u 330k
C18
0.01u
C12
0.1u
R10 R13 C15 R16
47k 10k 0.01u 100k
DC SWITCH
R8
4.7k Q1
SSM3K15TE(F)
C7 0.1u
C6 0.1u
C48
4.7u
DAC_23
CN7
DI
TC75S51FE(F)
OP AMP
(AF) 4
oUT
A : MIC SUM2/
B : MOD SUM
5
VDD
C64 0.01u
SCSW(MIC)
R49 C42
47k 0.1u
D1
KDR731
D2
KDR731
LOGIC SWITCH
(MIC)
AB
SCHEMATIC DIAGRAM
6 7 8 9 10
1 2 3
LOGIC SWITCH (AF)
33A
IC7
TC7W53FK(F)
5 5 4
A GND
6 3
CH1 VEE
4 R45 7 2
CH0 INH
0
8 1
VCC CoMMoN
C36 0.01u
SCSW (RXAF)
R44
47k
R40 47k
SIDE TONE MUTE
R39 R41
560k 220k
LOGIC SWITCH (AF)
C34 R42
IC6
TC7W53FK(F)
0.01u 330k
C35 R43
1 8
CoMMoN VCC
0.01u 330k
2 7
INH CH0
3 6
VEE CH1
4 5
GND A
C32 0.01u
33A
D3,4
SPEED UP
DIODE
C65 D3
R78
KDR731
47p 0
C68
R75
1u
68k
IC12
3
IN-
2
VSS
1
IN+
IC14
OPAMP
OPAMP
(AF)
(AF)
ME
R74
A : MIC SUM1/
1M
B : VOX
C63
15p
D1,2
MIC AGC
Q3
2SC4738(GR)F
R69
10k
Q3,4
MIC AGC
R70
10k
Q4
2SA1832(GR)F
11
AC
NX-411
33A
OP AMP (AF)
IC10
TC75W51FK(F)
5
IN+B
6
IN-B
7
oUTB
8
VDD oUTA
A : VREF/
B : RX SUM
VGS REC SEL
LOGIC SWITCH (AF)
IC9
TC7W53FK(F)
5
A
6
CH1
7
CH0
8
VCC CoMMoN
C51 0.01u
D4
DA221
Q8
DC SWITCH
C85 R101 C86
68p 15k 0.039u
R100
680k
R102
12k
R96
33k
Q6
2SJ243-A
R91 C79 R93 C80
47k 0.1u 47k 1u
R94 C81
68k 0.1u
R98
R92 R95 C82
1k
0 560k 0.1u
11
X57-812 (A/2) 5/11
AD
5 6 7 8 9 10
1 2 3
VCO_MOD
1
2
3
2 3
1
C72
1000p
4
VSS
3 C73
IN+A
1u
1
2
IN-A
R83
1
100k
C69
0.01u
4
GND
3
VEE
2
INH
1
1
Q9
DC SWITCH
(MIC)
3.31V
Q9
2SJ347F
Q8
SSM3K15TE(F)
R134
470
C99
1u
DC SWITCH
(MIC)
79