Read Sharp ER-A280 / ER-A280N / ER-A280F (serv.man5) Service Manual online
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 14
■
REAR DISPLA
Y I/F
2/5
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
G4
G3
G5
G2
G6
G8
G10
G9
G1
G2
G3
G6
G4
G5
G9
G7
G8
G10
B#
DP#
D#
G#
C#
F#
E#
G1
B#
DP#
D#
A#
G#
C#
F#
E#
A#
G7
G7
G8
G9
G10
CHK_REAR
G1
G2
G3
G4
G5
G6
A#
B#
C#
D#
E#
F#
G#
DP#
VLED
VLED
v5p_STB1#
v5p_STB2#
v5p_STB3#
v5p_STB4#
v5p_STB5#
v5p_STB6#
v5p_STB7#
v5p_STB8#
v5p_STB9#
v5p_STB10#
c
d
e
f
g
dp
CHK_REAR
a
b
to Pop-Up RearDisplay
max 1.2A/Line
5.7v ~ 5.0v
signal
VLED = 5.0V
1.2A/each pin
max 0.2A/Line
from MAIN-PWB
3.3v -5.0v
signal OK
P-ch.FET
N-ch.FET
POP-UP
REAR
DISPLAY
(LED)
Vf 2.0v(Typ.)
2.9v(Max)
Id 30mA*8seg
*10digit
max 0.2A/Line
SAME AS
ER-A277P
2009,4,4
R10
23R7/F [1/2W 5025]
R10
23R7/F [1/2W 5025]
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
CN4
52610-2071
CN4
52610-2071
R4
23R7/F [1/2W 5025]
R4
23R7/F [1/2W 5025]
R6
23R7/F [1/2W 5025]
R6
23R7/F [1/2W 5025]
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6K1
Q9
QS6K1
Q9
R9
23R7/F [1/2W 5025]
R9
23R7/F [1/2W 5025]
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6J1
Q3
QS6J1
Q3
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6J1
Q1
QS6J1
Q1
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6J1
Q4
QS6J1
Q4
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6J1
Q2
QS6J1
Q2
R3
23R7/F [1/2W 5025]
R3
23R7/F [1/2W 5025]
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6J1
Q5
QS6J1
Q5
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6K1
Q7
QS6K1
Q7
R5
23R7/F [1/2W 5025]
R5
23R7/F [1/2W 5025]
R7
23R7/F [1/2W 5025]
R7
23R7/F [1/2W 5025]
R8
23R7/F [1/2W 5025]
R8
23R7/F [1/2W 5025]
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6K1
Q6
QS6K1
Q6
1D
6
1S
5
2D
4
1G
1
2S
2
2G
3
QS6K1
Q8
QS6K1
Q8
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