Service manual

UX-340L/UX-345L
UX-330L
[2] TEL/LIU PWB circuit
6 – 9
1
2 6
4
3
5
BDEFG
I
HCA
1
2 6
4
3
5
BDEFG
I
HCA
+5V
C15
0.022
IC1
2904
8 4
–
+
–
+
N.M.
N.M.
N.M.
–
+
ERZV5D471 x 2
+24V
MJ1-3
B
M
MJ1-4
MJ2-3 MJ2-4
TIP RING EXT-T EXT-R
C20
4.7/50
R14
3.3K
T1
2128
C6
0.033
ZD5
HZ2C1
ZD4
HZ2C1
R21
620
C5
0.01
D1
1SS133
Q2
2SC1815
+5V
B
B
C
Q1
DTC114
E
C1
4.7/50
R12
150
CML
Q3
DTC114
D2
1SS133
C4
0.82
R4
22K
R5
22K (1/2W)
R23
15K
CNLIU-10
TXOUT
C22
4.7/50
R19
10K
C16
2200P
2 3
1
R17
10K
R15
10K
C18
2200P
VREF
CNLIU-9
RX IN
ZD3
HZ27C
PC2
TLP521-1
CNLIU-11
CML B
E
L2
MJTEL-2
D3
E
CNLIU-12
+5V
VA1
VA2
R6
JUMPER
C19
N.M.
R18
10K
MJTEL-3
C8
1000P
HS
CNLIU-5
HOOK SW
CNLIU-8
RHS
R2
91
R3
30
ZD2
HZ2C1
ZD1
HZ2C1
PC1
PC814X
L6
L7
CML
C7
1000P
PC2
TLP521-1
CI
CNLIU-4
PC1
PC814X
VREF
R22
1K
R16
1K
C3
C17
22/50
L3
4
3
4
3
4
2
3
1
C
AR1
RA-391P-V6-2
N.M. N.M.
N.M. N.M.
ARG
N.M.
L5
VREF
R24
C21
N.M.
D4
R1
L4
FL05RD600ET
MJTEL-4 MJTEL-1
L1
C2
2200P
CNLIU-13
DG
C10
4.7/50
R10
1.5K
R7
1.5K
C14
1000P
R9
47K
6 5
7
CNLIU-1
TELOUT
R11
3.3K
R8
1K
R13
JP
C11
1000P
C12
1000P
VREF
C9
2.2/50
TP
TEL MUTE
TEL IN
CNLIU-3 CNLIU-2
C13
220P
+5V
CNLIU-14
+24V
CNLIU-7
P-IN
TP3
+5V
CNLIU-6
P-E
TP2
R20
100
P-IN
SG206S
PE
SG206S
C
IC1
2904
IC1
2904
NOTE:
These marks are all safety-critical parts.
N.M.