Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
CIRCUIT DIAGRAM AND PWB LAYOUT
– 20 –
LCD & USB
3/7
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
TO DRAWER SOLEN
I
O
D
LCD I/F
<<USB I/F>>
<<DRAWER I/F>>
<<LCD I/F>>
USB B Type
5V --> 3.3V
24MHz
1
E
C
2
B
3
2SD2212
XE-A404/50
5
NOT INSTA
L
L
ESD REF
modified 06
,
0
1
D[0..7]
DR
DB[0..7]
RW
K
E
DB0
DB4
DB2
DB1
DB3
DB6
DB5
DB7
7
B
D
0
B
D
7
D
0
D
D1
DB5
DB6
DB1
DB2
D2
D6
D5
4
B
D
3
B
D
4
D
3
D
DB1
DB0
D0
D1
DB2
D3
DB3
DB[0..7]
DB4
D4
D2
DB5
D6
D5
DB7
DB6
D7
CS3#
WR#
RD#
CS3#
A[0..19]
D2
DREQUSB#
D[0..7]
D2
A0
WR#
D0
D7
INTUSB
#
RD#
D1
D6
D4
D0
CS1#
D5
D3
D6
D3
D4
RS
T
#
D7
D5
D1
A6
A0
A3
A6
A2
A4
A4
A5
A0
A5
A1
A2
A3
A[0..6]
A1
LCD5V
RS
D[0..7]
DR
1
LCDON
BLON1
BLON0
LCDR
W
1
LCDE
1
LCDRS
1
LCDCS#
1
CS3#
WR#
RD#
CS3#
A[0..19]
INTUSB
#
1
DREQUSB#
1
WR#
RD#
U
S
B
RESET#
CS1#
A[0..6]
VLED
7
VCC
7
24
V
VCC
VLE
D
VLE
D
VCC
VCC
VCC
VCC
VCC3
VCC
VCC3
VCC
VCC
VCC
R19
10K
C66
0.47uF
IC12
BA033
F
8
6
4
R131
1.5K
+
C37
22uF/16V
1
2
CN5
22-04-10
3
1
1
2
3
C53
22pF
+
C33
10uF/50V
1
2
TP4
L2
DLP31SN121
S
L
2
1
4
2
3
R20
10K
CN4
UBR20-4W2C00
1
2
3
4
5
6
7
8
C45
100pF
IC8
74HCT37
4
1
2
3
4
5
6
7
9
10
8
20
19
18
17
15
16
14
13
12
11
QE
Q0
D0
D1
Q1
Q2
D2
Q3
GND
D3
VCC
Q7
D7
D6
Q5
Q6
D5
D4
Q4
LE
R133
1M
C50
0.1uF
IC1
1
M
6
6
291G
P
1
2
3
4
5
7
6
8
9
10
11
12
13
14
15
17
18
19
20
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
21
22
23
24
25
26
27
28
16
CoreVcc
GND
D-
D+
Vbus
TEST
T
rON
Dack1#
Dreq1#
TC1#
INT1#/SOF#
IOVcc
Xout
Xin
GND
A1
A2
A3
A4
Dack0#
Dreq0#
RST#
CS#
LW
R
#
RD#
INT0#
HWR#/BYTE#
D15/A0
D14/P6
D13/P5
D12/P4
GND
IOVcc
D1
1/P3
D10/P2
D9/P1
D8/P0
D7
D6
A5
A6
D0
D1
D2
D3
D4
D5
CoreVcc
IC7
BA00CC0WFP
2
1
4
5
6
3
L4
BLM21PG
221S
N
1D
+
C34
22uF/10V
,OS
1
2
R127
0
F1
T500mA/
2
5
0
V
S
E
M
K
O
ZD6
UDZS 6.2B
1
2
X4
CSTCW
2
4
M
0
X
1
1
-R
0
2
3
1
C39
0.33uF
C48
0.1uF
IC21C
SN74LV
3
2
A
9
10
8
14
7
R134
470
R126
0
C40
100pF
C49
0.1uF
IC21D
SN74LV
3
2
A
12
13
11
14
7
R123
2.4KF
R1
19
2.4KF
R121
5.6KF
+
C41
10uF/50V
1
2
FB3
EFCB32
2513T
S
R130
27
ZD7
UDZS 6.2B
1
2
C42
100pF
R125
0
C47
0.1uF
R18
10K
C31
0.1uF
C46
100pF
C51
0.1uF NOT
M
O
U
N
T
C56
0.33uF
IC10
74L
V
5
4
1
A
1
2
3
4
5
6
7
9
10
8
20
19
18
17
15
16
14
13
12
11
OE1#
A1
A2
A3
A4
A5
A6
A8
GND
A7
VCC
OE2#
Y1
Y2
Y4
Y3
Y5
Y6
Y7
Y8
R17
10K
D8
1SS3
5
5
1
2
L1
BLM21PG
221S
N
1D
R129
27
CN3
TJC3-1
6
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
+
C43
10uF/50V
1
2
IC9
BA00CC0WFP
2
1
4
5
6
3
C35
0.33uF
R1
17
5.6KF
R21
10k
+
C58
22uF/10V OS-CON
D5
1SR154-40
0
1
2
Q2
2SD221
2
C
B
E
FB2
E
F
C
B
3
2
2513T
S
R128
47
K
+
C55
10uF/50V
1
2
C52
22pF
C32
0.1uF
C44
100pF
R124
0
+
C38
22uF/10V
,OS
1
2
C54
1uF
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