Service manual
UX-A255U
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Control PWB circuit 1/6
Main control block
6 – 1
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
STRB3-
STRB2-
STRB1-
PCLK
DATA
LATCH-
DG
DG
DG
D0
D1
D2
D3
D4
D5
D7
DG
(2-4G)
(2-5A)
DG
!T
STRB4-
SEN3
SEN2
SEN1
E
SEN4
SEN0
DG DGDG
DG
D6
A0
A3
A13
A11
A15
(2-6A)
A8
A7
A18
A9
A16
A14
A17
A5
A4
A10
A12
A1
A6
A2
DG
DG
DG
DG
DG DG
DG
CISCLK
KEN1A
KEN4A
KEN2A
KEN3A
SEN6
SEN5
(2-4A)
(2-3A)
(2-3A)
(4-2D)
(5-2I)
(6-1E)
(5-5E)
(5-5E)
(5-5E)
(5-5E)
DG
DG
(5-6D)
N.M.
<G>
DG
DG
(2-4G)
(2-4G)
(6-2A)
(2-3F)
+3.3V
VBAT
+3.3V
+3.3V
C168
0.1u/50V
<D>
C166
1u/10V
C132
22p/50V
<L>
C104
R106
470
R132
1K
C138
0.1u/50V
C196
C1401u/10V
<K>
R175 270
C144
1u/10V
DG
C154
N.M.
C102
N.M.
<J>
C122
0.1u/50V
R105
470
C116
N.M.
C198
C129
0.1u/50V
R101
10K
IC 3
SCE214V(1/2)
FAX CONTROLLER
33
32
141
142
143
144
145
146
147
148
140
139
138
137
136
135
134
131
130
129
128
127
126
125
124
123
122
121
120
118
114
117
116
115
6
5
3
4
175
176
25
26
27
31
34
28
36
35
30
29
44
39
40
49
149
19
20
21
22
171
172
173
174
12
13
14
15
16
17
18
10
11
69
67
57
58
59
60
63
62
61
165
133
107
70
50
45
9
2
8
108
7
1
166
161
132
119
64
48
24
47
46
43
38,41
42
23
97
TEST0
TEST1
D0
D1
D2
D3
D4
D5
D6
D7
A23
A22
A21
A20
A19
A18
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A0
A3
A2
A1
RD
WR
ROMCS
SYNC
REGDMA/GPO18/CLKDIV0
WAIT/GPO19/CLKDIV1
RAS
CAS
DWR
WRPROT
BATRST
VBAT
PWRDWN
INTPWRDOWNE
XOUT
XIN
VREFp
VREFn/CLREF
VIN
THADI
ALTTONE (BZ)
OPI0
OPI1
OPI2
OPI3
SM0
SM1
SM2
SM3
OPO0
OPO1
OPO2
OPO3
OPO4
OPO5
OPO6
SXIN
SXOUT
CLK2
START
STRB0
STRB1
STRB2
STRB3
PCLK
PDAT
PLAT
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSSPLL
TSTCLK
RESET
DEBUGn
VDDPLL
VDD
VDD
VDD
VDD
VDD
VDD
VDD
IVREFp
IVREFn
ADXG
ADGA
ADVA
LCDCS
VDD
C121
0.1u/50V
<A>
C103
R130
1K
<! T>
<! T><! T>
<! T>
C147 1u/10V
C199
C113
100p
C111
R156
270
RA2
470
5
1
8
7
6
2
3
4
32.768KHz
X2
RA1
470
5
1
8
7
6
2
3
4
C145
1u/10V
C109
C141
0.1u/50V
C197
RA3
470
5
1
8
7
6
2
3
4
R134
220
R108
470
C123
0.1u/50V
R135
1K
C112
32.256MHz
X1
R128
220K
C174
R173 270
<BATRST>
R133
1M
C143
1u/10V
<M>
R155 270
C167
<F>
C115
100p
C170
1u/10V
C108
C131
22p/50V
C177
100p/50V x 7
C149
20p/50V
R104 0
C142
1u/10V
C194
<I>
C146
20p/50V
R116 270
<C>
C148
1u/10V
C130
0.1u/50V
R187
100
C118
N.M.
<H>
C119
0.1u/50V
C175
<CISCLK>
R118
1K
<E>
C200
1000p/50V x 3
C152
C176
<B>
R157
10M
C195
R117 150
C101
C110
100pF x 5
C107
WR-
THADI
BZOUT1
CNTH-10
CNTH-2
CNTH-12
CNCIS-5
CNTH-11
CNTH-3
CNPN-10
CNPN-12
CNPN-9
CNPN-13
A[18:0]
PWRDWN-
TPB-
TPA-
TPA
TPB
CNTH-14
CNTH-13
CNCIS-4
CNPN-14
CNPN-11
CNPN-2
CNPN-3
CNPN-4
CNPN-15
CNPN-16
CNPN-1
D[7:0]
RD-
CAS-
ROMCS-
VIN
DWR-
RAS-
RLYCONT
WP-