Sharp UX-B20 Service Manual

UX-B20U/UX-B20C/B25C
6 – 3
3. FAX Modem Block (3/8)
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
FLTXD
SIGMUTE
SIGMUTE
DTMFMUTE
DTMFMUTE
CNLIU-5
CNPN-8
CNL
CI- HS- RHS-
IU-11
CNLIU-7
CNLIU-15 CNLIU-14 CNLIU-16 CNPRG-3
RCVOL
PIN
CML
CNPN-7
VOLB
W-TONE LEDON
FSYNC MCLK CTRLSIN DATAI
ICLK
CDCRST
CNBKL
BKL1 BKL2
-2
CNPRG-1
WAIT
CNLIU-12
CNLIU-10
CNBKL-3
SIGTX
DATAO
VOLA
SPOUT
SPMUTE
MICIN
VOLC
MICMUTE
SIGRX
ASICRES
DG
DG
DG
+3.3V
DG
DG DG
+3.3V
DG
DG
VREF
DG
ADG
ADG
ADG
ADG
ADG
+24V
ADG
ADG
ADG
+3.3V
DGDG
ADG
DG DG
DG
(7-4D)
(7-2E)
(7-2E)
(7-3D)
(7-3I)
(7-3A)
FLRXD
SPMUTE
TELMUTE CML DPON DPMUTE
ORGSNS- FRSNS-
(4-4A)
(7-2E)
RCVOL
C320
1000pF
R163
R174
C330
R223
C286
0
.
1u/50V
C350
R229 110k
R129
C283
10u/10V
C196
0.1uK
C285
10u/10V
C190
Q104
BC
E
R183
C189
C2
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M. N.M.
N.M.
N.M.
82
Q103
BC
E
R186
1K
C241
0.1uF
C156
R184
C288 100p
R188
R165 470
C331
R168 270
C345
0.1uK
+ Ð
IC12A
3 2
1
114
R222 270
R22
R166
R231
3.3k
R187 2.2K
C197
1000p F
R103
C346
0.1uK
R164 270
R161 270
R149
C242
10u/10 (2012) (2012)
(2012)
V
R185
R215
R204 100
C191
R108
C243 0.1uF
C284
0.1uF
C154
R216
R217
R162
R218
C193 1000pF
IC5
SCE209L (2/2)
MODEM BLOCK
GPIO4
56
GPIO16
52
AVDD (IIA)
85
GPO28
155
GPIO31
159
GPO27
154
GPO25
68
GPIO34
162
GPO30/SR3OUT
157
GPIO32
160
GPIO17
51
SPKR_OUTP (IIA)
88
GPO1
168
MIC_INM (IIA)
81
MIC_INP (IIA)
80
GPO29
156
MCDE0
91
GPO0
167
LINE_INP (IIA)
79
N.C.
37
SASRXD
110
GPIO3
109
RDY
66
GPIO11/SERIN/SR4IN
65
GPIO36
164
GPIO35
163
MIC_BIAS (IIA)
82
TESTC
73
GPIO29
158
GPIO5
105
DSS_PARK
106
SASRXD2
103
LINE_OUTP (IIA)
87
SASTXD2
104
GPO3
170
GPO2
169
GPIO26
150
GPIO27
151
GPO26
153
GPIO9
112
SOUT (IIA)
74
POR (IIA)
77
FSYNC (IIA)
76
ICLK (IIA)
92
MCLK (IIA)
71
CTRLI (IIA)
72
SIN (IIA)
75
SA1CLK
102
IA1CLK
98
IACLK
96
SR1IO
101
SR4OUT
100
SR3IN
99
IARESET
95
DVSS(IIA)
93
DVDD (IIA)
90
SPKR_OUTM (IIA)
89
AGND (IIA)
84
VREF (IIA)
83
AVSS2 (IIA)
78
AVSS1 (IIA)
86
GPIO8
113
GPIO28
152
SASTXD
111
R160 270
C195
1000pF
R182
270
C347
C52
L104
15
R203 100 R167 33
R242
R206
R240
R225 10k
C155
R224
110k
C321 1000pF
R169
1k
R227 10k
R171 270
C31 0.1uF
LM2902NSR
N.M.
N.M.
N.M.
N.M. N.M. N.M.
(6-1A)
(7-3E)
(4-3A)
(6-3F)
(7-3I) (7-3I) (7-3I)
(4-4H)
(7-6B)
(7-6B)
(7-6B)
(7-6B)
(7-5A)
(7-6B)
(7-6B)
(7-1A) (7-2E)
FAX Modem Block
3/8

Sharp UX-B20 Specifications

General

Brand	Sharp
Model	UX-B20
Category	Fax Machine
Language	English