Service manual

UX-A260U
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
6 6
5 5
4 4
3 3
2 2
1 1
CNLIUA-5
CNLIUA-14
SPOUT
DTMFMUTE
CNSP-1
VOLA
VOLB
VOLC
BZOUT1
RCVOL
SIGMUTE
SIGTXCNLIUA-8
CNSP-3
W-TONE
SPMUTE
CNLIUA-9
CNSP-2
CNLIUA-7 SIGRX
TELOUTi
VREG
+3.3V
+3.3V
+3.3V
+3.3V
DG
DG
DG
DG
(3-5A)
N.M.
N.M.
N.M.
DG
DG
DG
DG
(3-2H)
SP-
SP+
DG
DG
DG
(3-5A)
(3-1A)
(3-3A)
(3-1A)
(3-1A)
TELOUT
DG
(1-1F)
(3-2H)
TELIN
DG
(3-5A)
(3-3H)
RXIN
Q103
RT1N141C
BC
E
R160
C188
0.1u/16V-K
R165
6.8K
A
C
LV4051
TC4S66
X0
X1
X2
X3
X4
X5
X6
X7
X
B
VDD
GND
VEE
E-
IC5
IC4
16
7
11
10
9
6
313
14
15
12
1
5
2
4
8
R121
150K
D102
1SS355
R137
20K
Q104
RT1N141C
BC
E
C212
0.1u/50V
Q112
BC
E
ZD101
N.M.
C208
1u/10V-K
C189
1u/10V
R164
1M
R180 39K
R184
R194
C2
47u/25V
12
C187
0.1u/16V-K
R143 39K
R144 24K
C182
1u/10V-K
C181 0
R140 470K
R142 200K
R138
N.M.
R122
100K
C186
0
C156
0.1u/50V
R146 91K
C125
1u/10V
C150
1u/10V
R136
3K
R124 220K
R145 6.2K
R131
15K
R141 1.5M
Q106
BC
E
R195
0
R200
Q105
RT1N141C
BC
E
D103
1SS355
2
1
53
4
C133
0.01u/50V
R139 220K
C134 220p/50V
C151
4700p/50V
R182
R167
4.7K
-
+
NJM2113
IC7
5
4
3
2
1
7
8
6
C155
C180
C179
1u/10V-K
DGDG
(3-5A)
(3-3H)
(3-4A)
CML
TXOUT
DG
N.C
Analog signal block 6/6
6 – 6