Sharp UX-B20 Service Manual

UX-B20U/UX-B20C/B25C
6 – 1
FAXUX-B20U/UX-B20C/B25CService ManualService ManualMarketE
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Control PWB circuit
1. Main Control Block (1/8)
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
D2
D0
D5
D6
D3
D7
D4
D1
A18 A17 A11 A13 A1 A2 A14 A16 A0 A10 A6 A8 A4 A7 A5 A3 A12 A9 A15
SEN6
SEN5
SEN4
ENABLE
CNPN-13
PCLK
CNPN-3
GACS- FLCS-
INT
CNPN-4
ENABLE
CLOCK
CNCIS-4
DWR-
PDAT
CNPN-14
WR-
CAS-
ROMCS-
VIN
BZOUT1
CNPN-12
PLAT
RD-
CNCIS-5
CNPN-11
CNPN-1
D[7:0]
RAS-
CNPN-2
SCANSYNC
A[18:0]
CNPN-16
CNPN-15
CNPN-10
CNPN-9
DG
DG
DG
DG
+3.3V
DG
DG
+3.3V
DG
DG
DG
DG
DG
+3.3V
DG
DG
+3.3V
VBATn
DG
VBAT
DG
DG
DG
+5V
DG
DG
(4-4A)
(4-3A)
(2-4A)
(2-3A)
<DG>
KEN2A
(4-3A)
(2-4G) (2-4G)
KEN1A
(7-3E)
KEN4A
E
(4-3A)
(2-3A)
¿T
(4-3A) (4-3A)
<G>
(2-4G)
(4-3A)
SEN2
SEN3
(4-3A)
(6-5D)
CISCLK
(2-5A)
(2-4D)
(4-3A)
(1-2A)
(4-2A)
SEN1
SEN0
(2-6A)
(1-1D)
C194
1u/10V
C327
100pFx8
C322
C325
C124
22pF
RA2 470
5
18
7
6
2
3
4
<D>
R131 220K
<F>
R128
68
C121
<H>
32.768KHz
X1
R133
0
C323
RA1
470
5
18
7
6
2
3
4
R205
R130
10M
C5
1u/10V
RA19 33
5
18
7 6
2 3 4
R170 270
C127
C129
1u/10V
<B>
R202 33
<E>
C7
1u/10V
C280 100pF
R121 33
C319
R200 33
C128
1u/10V
C328
R116 270
DG
C132
RA17 33
5
18
7 6
2 3 4
C6
1u/10V
R201 33
C316
N.M.
R126
68
<M>
C281 15pF
C122
R115 270
<I>
<A>
C30
1u/10V
C13
1u/10V
C131
1u/10V
R122
470
C123
1u/10V
C317
R118
10K
R28
0
IC13
1 2
4 5
3
R124 68
C1
C318
RA18 33
5
18
7 6
2 3 4
C120
R132
10K
<J>
R123
470
R120
33
C329
<K>
<CISCLK>
C130
1u/10V
<C>
C125 1u/10V
R119 33
C133 1u/10V
C153 100pF
C126
18pF
C192
1u/10V
C53
<L>
SCE209L (1/2)
IC5
TEST0
33
TEST1
32
D0
141
D1
142
D2
143
D3
144
D4
145
D5
146
D6
147
D7
148
A23
140
A22
139
A21
138
A20
137
A19
136
A18
135
A17
134
A16
131
A15
130
A14
129
A13
128
A12
127
A11
126
A10
125
A9
124
A8
123
A7
122
A6
121
A5
120
A4
118
A0
114
A3
117
A2
116
A1
115
RD
6
WR
5
ROMCS
3
SYNC/GPO20
4
REGDMA/GPO18/CLKDIV0
175
WAIT/GPO19/CLKDIV1
176
RAS
25
CAS
26
DWR
27
WRPROT
31
BATRST
34
VBAT
28
PWRDWN
36
INTPWRDOWNE
35
XOUT
30
XIN
29
VREFp
44
VREFn/CLREF
39
VIN
40
THADI
49
ALTTONE (BZ)
149
OPI0
19
OPI1
20
OPI2
21
OPI3
22
SM0
171
SM1
172
SM2
173
SM3
174
OPO0
12
OPO1
13
OPO2
14
OPO3
15
OPO4
16
OPO5
17
OPO6
18
SXIN
10
SXOUT
11
CLK2
69
START
67
STRB0
57
STRB1
58
STRB2
59
STRB3
60
PCLK
63
PDAT
62
PLAT
61
VSS
165
VSS
133
VSS
107
VSS
70
VSS
50
VSS
45
VSS
9
VSSPLL
2
TSTCLK
8
RESET
108
DEBUGn
7
VDDPLL
1
VDD
166
VDD
161
VDD
132
VDD
119
VDD
64
VDD
48
VDD
24
IVREFp
47
IVREFn
46
ADXG
43
ADGA
38
ADVA
42
LCDCS
23
VDD
97
CS3
54
FCS1
94
CS5
53
IRQ15n
55
ADGA
41
C326
<¿T>
C14
1u/10V
RA16 33
5
18
7 6
2 3 4
R117 270
R125
470
R173
33
R172 100
C324
R127
33
N.M.
N.M.
TC7SET08FU
N.M.
N.M.
<CS5> <CS5n>
<BATRST>
<BATRSTA>
N.M.
N.M.
Main Control Block
1/8
FAX CONTROLLER

Sharp UX-B20 Specifications

General

Brand	Sharp
Model	UX-B20
Category	Fax Machine
Language	English