Sharp ER-A220 (serv.man2) Service Manual ▷ View 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
KEY MATRIX
4.7K
47
K
OUT
P
UT
COMMON
B
C
E
IN
PU
T
10
KRC106S
2SD2170
B
C
E
30
0
3.5K
KRC111M, KRC111S
7.2K
2.7K
3K
COMMON
OUT
P
UT
GND
IN
PU
T
KID65083
4.7K
47
K
IN
PU
T
OUT
P
UT
COMMON
KRA101M, KRA106S
1
2
3
4
5
6
7
0
8
17
26
32
38
44
50
51
45
39
33
27
18
9
1
23
3
11
20
29
35
41
47
53
55
49
43
37
31
22
13
5
24
25
4
12
21
30
36
42
48
54
52
46
40
34
28
19
10
2
NU
NU
NU
8
9
10
MODE SW
/S0
/S1
/S2
/S3
/S4
/S5
/S6
/S7
/S8
43
42
55
54
49
48
1
2
3
4
5
6
7
8
9
10
11
CN1
1
52
045
-114
5
K/
B C
N
1
7
6
5
4
12
13
14
15
16
25
24
23
22
21
30
31
37
36
3
2
1
08
9
10
11
20
19
18
17
26
27
28
29
35
34
33
32
41
40
39
38
53
52
47
46
45
44
50
51
P
9
1
P
9
2
P
9
3
P
9
4
P
9
5
P
9
6
P
9
7
/
S
7
/
S
6
/
S
5
7
61
4
1
5
1
6
^
NU
12345678
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
CN6
52
044
-214
5
K/
B C
N
2
/S9
/S1
/
S
4
/
S
3
/
S
2
/
S
1
/
S
0
G
N
D
/
R
E
S
E
T
G
N
D
M
O
R
V
O
F
F
2/2
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
G1
'..G7'
G1
'
G2
'
G3
'
G4
'
G5
'
G6
'
G7
'
41
7
1 8
12
3
1 5
1 6
97
1 2
5
681
0
1 1
1 4
1 3
FND
4
41
7
1 8
1
231
5
1 6
971
2
56
81
0
1 1
1 4
1 3
FND
2
41
7
1 8
123
1 5
1 6
97
1 2
568
1 0
1 1
1 4
1 3
FND
3
41
7
1 8
1231
5
1 6
971
2
5681
0
1 1
1 4
1 3
FND
1
HDSP5
621 X 4
G1
'
G2
'
G1
1
G2
2
G3
3
G4
4
G5
5
G6
6
G7
7
A'
8
B'
9
C'
10
D'
11
E'
12
F'
13
G'
14
DP'
15
CN1
52807
-1510
G3
'
G4
'
G5
'
G6
'
G7
'
A'
B'
C'
D'
E'
F'
G'
DP'
R1
27
R2
27
R3
27
R4
27
R5
27
R6
27
R7
27
R8
27
F'
G'
DP'
C'
D'
E'
A'
B'
A'..DP'
4. CUSTOMER DISPLAY PWB CIRCUIT DIAGRAM
5. MAIN PWB LAYOUT
(1) Side-A
(2) Side-B
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