Read Sharp ER-A770 (serv.man4) Service Manual online
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
2/2
KEY I/F
1
2
3
4
5
6
7
8
9
10
11
12
CON6
/S
9
1
2
3
4
5
6
7
8
9
10
11
12
13
CON1
/KS0
/KS1
D1
D2
D3
/S
0
/S
1
/S
0
/S
1
ST
0
ST
1
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
IC
1
74L
S138
ST
0
ST
1
ST
2
ST
3
VCC
ST
2
ST
3
A
1
B
2
C
3
G1
6
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
IC
2
74L
S138
/S
2
/S
3
/S
4
/S
5
/S
6
/S
7
/S
8
/S
9
/S
1
0
/S
1
1
/S
2
/S
3
/S
4
/S
5
/S
6
/S
7
/S
8
/S
9
/S
1
0
/S
1
1
/S
1
2
/KS2
/KS3
/KS4
/KS5
/KS6
/KS7
/KS8
/KS9
/KS10
/KS11
/KS12
D11
D4
D5
D6
D7
D8
D9
D10
D12
D13
1
2
3
4
5
6
7
8
CON7
/X
6
/X
7
/S
8
2
3
1
IC
3
A
74L
S125
5
6
4
IC
3
B
74L
S125
FB
10
BLM31
FB
11
BLM31
VCC
/X
5
/S
7
9
8
1
0
IC
3
C
74L
S125
FB
12
BLM31
/C
FS
R
/C
0
/C
1
/C
2
/C
3
/C
4
/C
5
D19
X 20
D14
D15
D20
D21
D22
D23
1SS
353
/C
6
/S
2
/S
3
/S
4
/S
5
/S
6
/S
7
/S
8
/S
1
2
x1
2
VCC
R1
47K
R2
R4
R3
R5
R6
R8
R7
R9
R10
/K
R
0
A
/K
R
1
A
/K
R
2
A
/K
R
3
A
/K
R
0
B
/K
R
1
B
/K
R
2
B
/K
R
3
B
/K
R
0
C
/K
R
0
A
/K
R
1
A
/K
R
2
A
/K
R
3
A
/K
R
0
B
/K
R
1
B
/K
R
2
B
/K
R
3
B
/K
R
0
C
1
2
3
4
5
6
7
8
9
10
11
12
CON2
/K
R
3
A
/K
R
3
B
/K
R
3
C
/K
R
2
A
/K
R
2
B
/K
R
2
C
R25
R21
R17
47K
R26
R18
R22
47K
VCC
x3
x3
1C0
6
1C1
5
1C2
4
1C3
3
2C0
10
2C1
11
2C2
12
2C3
13
A
14
B
2
1G
1
2G
15
1Y
7
2Y
9
IC
5
74HC153
/K
R
2
/KR3
/X
4
/S
6
/S
5
2
3
1
IC
6
A
74L
S125
12
11
1
3
IC
3
D
74L
S125
FB
14
BLM31
/X
2
/X
3
/S
4
5
6
4
IC
6
B
74L
S125
FB
13
BLM31
FB
15
BLM31
/K
R
0
VCC
x3
1C0
6
1C1
5
1C2
4
1C3
3
2C0
10
2C1
11
2C2
12
2C3
13
A
14
B
2
1G
1
2G
15
1Y
7
2Y
9
IC
4
74HC153
/K
R
0
A
/K
R
0
B
/K
R
0
C
R23
R19
R15
47K
/K
R
1
C
/K
R
2
C
/K
R
3
C
/K
R
1
C
/K
R
2
C
/K
R
3
C
R12
R11
/K
R
1
A
/K
R
1
B
/K
R
1
C
KEX
0
KEX
1
KEX
0
KEX
1
R24
R20
R16
47K
R13
4.
7K
x3
R14
4.
7K
/KR1
VCC
/X
1
/S
3
/S
2
9
8
1
0
IC
6
C
74L
S125
FB
16
BLM31
/X
0
12
11
1
3
IC
6
D
74L
S125
FB
17
BLM31
/C
FS
R
D24
1SS
353
R28
4.
7K
/C
FS
R
2-5
C
2-5
C
2-5
B
2-5
B
2-1
B
2-1
B
2-1
B
2-1
B
2-5
C
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