Read Sharp ER-A280 / ER-A280N / ER-A280F (serv.man5) Service Manual online
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 15
■
LCD I/F PWB
3/5
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
D9
D10
D1
1
D8
D12
D13
D14
D15
D9
D10
D11
D8
D12
D13
D14
D15
CS#
A0
E_A
R/W#
RES#
CS#
A0
E_A
R/W#
RES#
LCDON
VREF-L
LCDON_PWM
LCDON_PWM
LCDON
VCC3
VCC5
VBL-
VBL+
VCC3
VCC5
VBL+
VBL-
VCC5
f
/
i
e
l
u
d
o
M
D
C
L
f
/
i
B
W
P
N
I
A
M
to Back-Light
USE RIGHT ANGLE CONNECTOR
not mount
not mount
C24
(470pF)
C24
(470pF)
1
2
CN7
S2B-ZR-SM4A-TF(JST)
CN7
S2B-ZR-SM4A-TF(JST)
R231
16KF
R231
16KF
R234
(NU)
R234
(NU)
C16
1uF
C16
1uF
C7
1uF
C7
1uF
C20
0.33uF
C20
0.33uF
1
TP3
TEST
POINT
TP3
TEST
POINT
C15
1uF
C15
1uF
C22
2.2uF (2125)
C22
2.2uF (2125)
C6
1uF
C6
1uF
R235
100
R235
100
C32
10uF
C32
10uF
C21
2.2uF (2125)
C21
2.2uF (2125)
C9
1uF
C9
1uF
C14
0.1uF
C14
0.1uF
C13
1uF
C13
1uF
R232
150K
R232
150K
C18
1uF
C18
1uF
C10
1uF
C10
1uF
R13
15F
R13
15F
PA
D
1
PA
D
1
C26
0.1uF
C26
0.1uF
C1
1
1uF
C1
1
1uF
C8
1uF
C8
1uF
R1
1
1M
R1
1
1M
C25
1uF
C25
1uF
C31
0.1uF
C31
0.1uF
C23
(470pF)
C23
(470pF)
C19
0.47uF
C19
0.47uF
C5
1uF
C5
1uF
A
C
D21
RB160M-40
D21
RB160M-40
D
G
S
Q10
2SK3541
Q10
2SK3541
C12
1uF
C12
1uF
R17
47K
R17
47K
B
E
C
Q1
1
(DT
A1
14EKA)
Q1
1
(DT
A1
14EKA)
3.3V
1
3.3V
2
CS#
3
A0
4
E-CLK
5
R/W#
6
GND
7
GND
8
D8
9
D9
10
D10
11
D1
1
12
D12
13
D13
14
D14
15
D15
16
GND
17
RES#
19
GND
18
LCDON
20
VCC5
21
VCC5
22
00 6200 227 032 800+
CN6
00 6200 227 032 800+
CN6
R70
(10K)
R70
(10K)
R236
16KF
R236
16KF
R233
(100)
R233
(100)
C17
1uF
C17
1uF
VCI1
36
C11
-
35
C11
+
34
C12-
33
C12+
32
VOU
T
31
VSH
30
VM
29
VREFM
28
VREFL
27
C86
26
VSS
25
VDD
24
VCC
23
CSB
22
A0
21
E
20
R/WB
19
D8
18
D9
17
D10
16
D11
15
D12
14
D13
13
D14
12
D15
11
VCI2
10
C21-
9
C21+
8
C22-
7
C22+
6
VCH
5
VCL
4
CEM
3
CEP
2
RESB1
1
CN5
04-6240-036-013-894+(ELCO)
CN5
04-6240-036-013-894+(ELCO)
L1
22uH (#A915A
Y
-220M=P3)
L1
22uH (#A915A
Y
-220M=P3)
SHDN
1
OVD
2
VIN
3
SW
4
FB
6
GND
5
TB62752AFUG
IC4
TB62752AFUG
IC4
R12
(47K)
R12
(47K)
1
TP2
TEST
POINT
TP2
TEST
POINT
A
C
D1
1
RB521S-30
D1
1
RB521S-30
R237
75KF
R237
75KF
R230
(NU)
R230
(NU)
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