Sharp UX-B20 Service Manual

UX-B20U/UX-B20C/B25C
6 – 7
7. Analog Signal Block (7/8)
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
SIGTX
DTMFMUTE
CN
TXOUT
LIU-9
RCVOL SIGRX
W-TONE
SPOUT
BZOUT1
VOLA
VOLC
VOLB
MICIN
CNSP-2
CNSP-1
SPMUTE
SIGMUTE
C(3-5H) D CRST
FSYNC
(3-6H)
(3-6H)
(3-5H)
(3-5H)
(3-4H) (3-4H)
MCLK
DATAI
CTRLSIN
ICLK
DATAO
CNM
MIC+ MIC-
IC-1
(8-2D) (8-2D)
CNMIC-2
CNLIU-13
CNLIU-6
CML
CNLIU-8
+3.3V
+3.3V
+3.3V
+5V
+3.3V
+3.3V
+3.3V
+5V
ADG
ADG
ADG
ADG
ADG ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG ADG
ADG
ADG ADG
ADG
ADG
ADG
ADG
VREF
VREF
VREF
+24V
ADG
+3.3V
ADG
ADG
+24V
ADG
ADG
VREF
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
ADG
+5V
DG
DG
+24V
C290 1u/10V
R141
R11
1k
C42
0
R16
3.3k
R208
Q102
RT1N141C
BC
E
R239
R232
39K
C289 0
L101
R13
39k
R228 220k
C292 220p
C136
4700pF
C295
R210
7.5K
TP203
C344
10u/10
(2012)
V
R191
R147
C249
+ Ð
IC12C
LM2902NSR
10
9
8
4
11
C158
Q100
BC
E
R21
TP204
C199
R136 100K
C342
N.M.
N.M.
N.M.
SP+ SP-
R139
18K
R20
C200
C138
0.01uF
TP205
R238
C209
N.M.
N.M.
N.M.
N.M.N.M.
N.M.
C339
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
C250
0.1uK
C287 220pF
C160 0.1uF
IC11
DVSS
20
DVDD
21
AVSS_TX
16
AVSS_RX
8
AVDD
15
AGND
14
NC6
32
NC1
25
NC2
27
NC3
28
NC4
29
NC5
30
VREF
13
MICINP
10
MICINN
11
LINEIN
9
SPKRON
19
SPKROP
18
LINEO
17
XCLOKO
22
MODE1
23
MODE0
24
TEST
3
SOUT
4
SIN
5
MICBIAS
12
FSYNC
6
ICLK
26
MCLK
31
CTRLSOUT
2
CTRLSIN
1
POR
7
C340
C203
C248
R19
0
C246
R190
C208
R135
20K
C335
N.M.
C35
0.1uK
R148
C139 0.1uF
L107
0
C20
C36
C291
0
C207
0.1uF
C22
10uF
C49 0.1uF
R140
82K
C337
2200pF
R12 39k
R209 3.9K
C43
N.M.
C247
C244
R241
10k
C44
R233
C32
47uF/25V
12
C333
C21
C40
N.M.
C293
C159
C343
R142
R226 3.3k
C205
C135
1u/10V
R230
13k
C349
0
R194
1M
R146
R138
1k
R192
C19
+ Ð
IC12D
LM2902NSR
12 13
14
411
R15
N.M.
N.M.
R189
N.M.
N.M.
N.M.
N.M.
N.M.
R145
D106
1SS355
AK
C294
0
C334
R5
C251
R144
A
C
X0 X1 X2 X3 X4 X5 X6 X7
X B
VDD
GND
VEE
E-
IC2
IC9
16 7 11 10 9 6 313
14 15 12
1 5 2 4
8
R6
C252
1u/10V
Q106
BC
E
+ Ð
IC12B
LM2902NSR
5 6
7
411
R9
N.M. N.M.
N.M.
N.M.
N.M.
D105
AK
C198
N.M.
C253
0.1uK
Q101
RT1N141C
BC
E
R137
0
C338 2200pF
C245
C34 220pF
C161 220pF
C336 0.1uF
R14
1k
C41
R207
R175 220K
C45
2 1
53 4
Q107
BC
E
C39
22uF/50V
12
C201
C137
0.1uF
C162
C202
Ð +
IC6
NJM2113
5
4 3 2
1
7
8
6
R143
(3-5B)
(3-2H)
(3-3C)
(3-3H)
(3-3H)
(3-4B)
(3-5B)
(3-5B)
(3-2H)
(1-1F)
(3-1C) (3-2C) (3-2C)
(3-5B)
(8-2D)
(8-2D)
RXIN
TELOUT
TELIN
Analog Signal Block
7/8

Sharp UX-B20 Specifications

General

Brand	Sharp
Model	UX-B20
Category	Fax Machine
Language	English