UX-B20U/UX-B20C/B25C
6 – 12
2. LIU PWB Circuit (2/3)
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
HS
D
G
Vre
fA
DG
Vre
fA
DG
DG
DG
Vre
fA
Vre
fB
DG
DG
DG
DG
DG
DG
Vre
fB
Vre
fA
DG
Vre
fA
DG
24VA
DG
DG
DG
DG
CNLIU
-1
2
CN
LI
U
-8
CNHJ
-1
CN
LI
U
-7
TELOUT
CN
LI
U
-6
CNHJ
-2
IN
/O
U
T
CNL
IU
-1
3
TELOUT
CNHJ
-4
CNHJ
-3
CN
LI
U
-9
TX-
(1-1D)
RX
-
TE
LM
U
TE
RX
IN
TX+
TELOUT
M
ICM
UT
E
TE
LIN
TELOUT
TXO
U
T
RX
+
TELOUT
(1608&2125)
(1608&2125)
L1
R11
7
16k
C104
JP
3
JP
R116
3.3k
R1
1
10
0(
1/4W)
C1
23
33p
R1
32
C130
R1
06
C1
25
220p
C139
Q2 K
TC
31
98GR-AT
B
C
E
C1
38
ZD6
C128
R114
3.3k
R1
13
15k
R1
28
10k
C135
2200p
R1
12
22k
C1
22
0
C11
3
2200p
C124
1000p
C105
0
R13
0
3.
3k
D4
R12
9
13k
ZD4
HZ9
C3
R13
3
620
R126
3.3k
R107
R1
22
82k
R1
11
24k
C137
N.M.
R1
18
1k
E
Q105
R
T1
N
436C
B
C
JP
9
JP
R12
1
0
C129
R109
0
+
C11
C107
0
R12
150(1/4W)
C108
N.M.
N.M.
C115
1000p
C1
06
0.1u
/1
6V
(k
)
+ C12
C141
2200p
R1
10
39k
R1
27
11k
+
C1
0
N.M.
C136
2200p
L2
C127
2200p
R1
19
8.2k
L9
C102
+
C16
22u/16V
C1
26
0.1u
/1
6V
(k
)
+
C1
7
4.
7u/25V
R1
31
13k
D3
1N4148
R105
C1
16
1u
R1
9
E
Q104 R
T1
N
436C
B
C
C142
R134
1k
C114
220p
C1
09
820p
Q103
RT
1P141C
B
CE
IC101A LM2902
Ð
2
+
3
O
1
C112
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
IC101B LM2902
Ð
6
+
5
O
7
C1
10
33p
C132
C131
IC101C LM2902
Ð
9
+
10
O
8
R11
5
0
R1
25
82k
IC101D LM2902
Ð
13
+
12
O
14
R1
08
620
+ C2
N.M.
JP
2
JP
C140
N.M.
LIU
PWB
Circuit
2/3
Summary of Contents for UX-B20
Page 2: ... i UX B20U UX B20C B25C ...