68
TH-D72A/D72E
SCHEMATIC DIAGRAM
X57-784 (A/3) 3/8
K
L
M
N
O
3 . 3 V
3 . 3 V
0 . 7 V
3 . 2 V
1 . 3 V
0 . 6 V
3 . 3 V
4 . 7 V
7 . 3 V
1 0 . 6 V
AFB
33M
33C
VOX_IN
MICM
TONE
C_S
DTMF
C 8 1 1
0 . 1 5 u
C793
0.1u
C792
0.1u
2 S A 1 8 3 2 ( G R ) F
Q 7 1 3
R794
68k
C806
1u
D 7 2 6
R B 7 0 6 F - 4 0
2
1
3
D 7 2 5
R B 7 0 6 F - 4 0
2
1
3
R 7 9 1
1 0 k
C807
1u
R793
68k
2 S C 4 7 3 8 ( G R ) F
Q 7 1 2
R 7 9 2
1 0 k
R 7 6 4
0
I C 7 1 6
T C 7 5 W 5 1 F K ( F )
1 o U T A
2 I N - A
3 I N + A
4 V S S
5
I N + B
6
I N - B
7
o U T B
8
V D D
C 8 2 4
5 6 0 p
R 8 1 1
4 7 k
R 8 2 5
1 0 0 k
R 8 2 4
1 0 0 k
C826
180p
C 8 3 9
1 8 0 0 p
C 8 4 0 0 . 1 u
C 8 4 1 1 0 0 0 p
2 S K 1 8 3 0 F
Q 7 1 4
C843
560p
R 8 2 6
2 2 k
C836
0.047u
R 8 2 1
8 2 0 k
C 8 3 5
4700p
C834
1000p
C 8 3 7
0 . 0 1 u
R804
4.7k
C 8 3 3
4 7 0 0 p
R 8 0 5
6 8 0 k
R819
10k
R 8 0 8
3 3
R820
1k
R 8 0 6
3 9 k
R803
470
2SC4617(R)
Q 7 1 7
2SC4617(R)
Q 7 1 5
C 8 0 2
0 . 0 2 2 u
R 8 3 7
6 . 8 k
C838
3300p
C801
0.1u
2SK1830F
Q711
R 7 8 2
0
C796
0.22u
R779
56k
C 7 9 5
1 u
D 7 1 6
RB706F-40
2
1
3
R 8 2 3
1 0 k
R 8 0 9
1 0 k
C804
470p
C805
470p
C820
1u
C800
0.1u
C819
0 . 1 u
R 8 1 0
1 0 k
C790
2200p
C822
1000p
I C 7 1 5
T K 1 1 2 3 3 C U
1
NP
2
GND
3
CoNT
4
VIN
6
VoUT
C779
470p
C799
470p
C821
470p
R783
18k
C813
0.01u
R797
39k
2 S K 1 8 3 0 F
Q 7 1 6
C827
0.047u
R798
33k
C823
4.7u
R818
100k
I C 7 1 8
T A 4 8 S 0 3 3 A F
1E
N
2
IN
3
GND
4
oUT
5N
C
C829
470p
C832
470p
C830
0.33u
35
C831
10u
C 7 9 1
4 7 0 p
R 7 7 4 47k
Q 7 0 9
S S M 6 L 0 5 F U - F
R778
47k
R780
47k
I C 7 1 4
T C 7 5 W 5 1 F K ( F )
1 o U T A
2 I N - A
3 I N + A
4 V S S
5
I N + B
6
I N - B
7
o U T B
8
V D D
R775
18k
C810
0.039u
R767
1M
C 8 0 8
0 . 0 4 7 u
C797
1000p
R768
18k
R795
22k
R 7 6 6
1 8 k
C783
39p
C 8 0 9
5 6 0 0 p
R781
470k
R 7 7 7
1 8 k
R765
12k
I C 7 1 2
N J M 2 1 0 7 F - Z B
1 + I N P U T
2 V -
3 - I N P U T
4
o U T P U T
5
V +
C798
1000p
R796
4.7k
C845
10u
R828
22k
CN716
R986
0
R 8 9 0
2 2 0 k
R900
470
R 9 2 1
4 . 7 k
R971
6.8k
C 8 1 8
4 7 0 p
C853
0.012u
R 7 7 3
0
2SC4617(R)
Q 7 1 8
R733
4.7k
C 8 4 7
4 7 0 0 p
C 8 2 5
4 7 0 0 p
R 7 3 2
3 3 k
R 7 3 1
6 8 0 k
C762
1u
R 7 4 8
5 . 6 k
R730
470
C778
1u
I C 7 1 3
R 3 1 1 9 N 0 4 2 A F E
1 V D D
2 G N D 1
3 G N D 2
4
D o U T
5
C D
C753
2.2u
6.3
R 9 1 7
0
C752
1u
C751
1u
C 8 1 2
0 . 0 1 u
C781
2.2u 6.3
R 7 7 6
2 2 0 k
C 7 8 5
0 . 0 1 5 u
C 7 8 2
0 . 0 1 5 u
C794
0.1u
C 7 8 4
5 6 0 0 p
C 9 8 9
0 . 1 u
C756
1u
C776
1000p
1200
OP AMP
AF MUTE
OP AMP
SWITCH
SWITCH
CURRENT
STEERING
STEERING
CURRENT
STEERING
CURRENT
AMP
AMP
OP AMP
SWITCH
AMP
Q 7 1 8
Q 7 1 7
Q 7 1 5
SWITCH
VOLTAGE DETECTOR
R
V
A
V
3
.
3
R
V
A
V
3
.
3
GP_BU
GP_BU
GP_BU
47C
47C
33C
SAVE2
AFM
33C
B
B
9600 TData
9600 TData
MOD
AMP
AMP
TX-RX UNIT (X57-784X-XX) (A/3) : CONTROL SECTION