Kenwood TH-D72A Service Manual page 68

K
TH-D72A/D72E
GP_BU
47C
R 77 7
1 8 k
1 +I N P U T
2 V -
3 -I N P U T
C 78 2 C 785
0 . 0 15 u
0. 0 1 5u
R 7 64
0
CURRENT
STEERING
RB706F-40
C 795
1u
T C 75W 51F K (F )
47C
1 oU T A
R 76 6 2 I N - A
3 I N + A
18 k
4 V S S
OP AMP
SWITCH
33C
R 77 4 47k
S S M 6L05F U -F
SAVE2
AF MUTE
AFM
SWITCH
B
VOLTAGE DETECTOR
7 .3 V
I C 713
R 3119N 042A F E
1 VDD
2 G N D 1
3 G N D 2
68
X57-784 (A/3) 3/8
L
SCHEMATIC DIAGRAM
Q 7 1 6
2 S K 1 8 3 0 F
4. 7 V
OP AMP
I C 712
SWITCH
N JM 2107F - Z B
5
Q 7 1 4
V+ 2 SK 1 8 3 0 F
C 8 1 1
4
oU T P U T
0 . 1 5 u
R 776 22 0 k SWITCH
C 784
5600p
R 78 2
D716
0
1
3
2
I C 714
8
V D D C 8 0 9
7
oU T B
5 6 0 0 p
6
I N -B
5
I N + B
C 8 0 8
0 . 0 4 7 u
C 9 8 9
0 . 1u
Q 709
C 7 9 1
4 7 0 p
R 7 3 1
6 8 0 k
C 8 4 7
Q718
4 7 0 0 p
2SC4617(R)
C 802
R 7 4 8
R 7 3 2
33k
0. 022u 5 . 6k
Q718
AMP
1 0 . 6 V
5
C D
4
. 3 3 V
D oU T
I C 71 5
T K 1 1 2 3 3 C U
M
TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION
R 8 1 1 I C 7 1 6
4 7 k
T C 7 5 W 5 1 F K ( F )
C 8 2 4 1 oUTA
R 8 1 0 C 8 1 8
C 8 1 2
2 IN-A
o U T B
0 . 0 1 u 1 0 k 3 IN+A
4 7 0 p 5 6 0 p
I N - B
4 VSS
I N + B
R 9 2 1
OP AMP
4 . 7 k
R773
0
Q 7 1 2
D 7 2 5
CURRENT
2 S C 4 7 3 8 ( G R ) F
R 7 9 1
1
STEERING
3 AMP
1 0 k
2
R B 7 0 6 F - 4 0
D 7 2 6
R B 7 0 6 F - 4 0
1
3
AMP
R792
2
CURRENT
1 0 k
Q713
STEERING
2 S A 1 8 3 2 ( G R ) F
R 8 0 8
3 3
3 . 2 V
R805
0 . 6 V
6 8 0 k
Q 7 1 5
4 7 0 0 p
C 8 2 5 2SC4617(R)
3 9 k
R 8 0 6
4 7 0 0 p
Q 7 1 5
AMP
3 . 3 V
A V R . 3
T A 4 8 S 0 3 3 A F
C819
0 . 1 u
N
GP_BU
3 .3 V
R 8 2 5
100k
V D D
8 R 9 1 7 R 8 2 6
C 8 3 9
7 2 2 k
0
6
1 8 0 0 p
R 8 2 4
5
1 0 0 k
C 8 4 0 0 .1 u
C 8 4 1 1 0 0 0 p
R 8 2 3
R 8 0 9
1 0 k
1 0 k
R 8 9 0
2 2 0 k
0 . 7 V
R 8 2 1
C 8 3 3
C 8 3 5 8 2 0 k
R837
C 8 3 7
4700p
0 . 0 1 u
6 . 8 k
Q 7 1 7
1 .3 V
2SC4617(R)
Q 7 1 7
AMP
3 . 3 V
3 V A V R
I C 7 1 8
CN716
O
MOD
B
33C
9600 TData