ER-A410/ER-A420 CIRCUIT DIAGRAM AND PWB LAYOUT
– 28 –
<FLAT KEYBOARD>
4 5 6 7 8 9 10 11 12 13 14 15 16 17
21 22 23 24 25 26 27 28 29 30 31 32 33 34
38 39 40 41 42 43 44 45 46 47 48 49 50 51
55 56 57 58 59 60 61 62 63 64 65 66 67 68
72 73 74 75 76 77 78 79 80 81 82 83 84 85
8990 91 92 93 94 95 96 97 98 99 100 101 102
106 107 108 109 110 111 112 113 114 115 116 117 118 119
MODE SW1
35
52
20
19 22
23
56
88
72
55
54
24
12
57
11
25
10
30
29
45
62
78
96 77
76
61
59
28
4336
21
53
70
NORMAL KEYBOARD1
FLAT KEYBOARD1
3
4
7
8
9
93
92
58
26
27
41
6
5
97 99 100 118
101838281
63
64
46
14 51
34
85
8448
31
32
15 49
33
50
67
R J 3
18 19 20
35 36 37
52 53 54
69 70 71
86 87 88
103 104 105
D1
1SS133
D2
1SS133
D3
1SS133
D4
1SS133
D5
1SS133
D6
1SS133
D7
1SS133
D8
1SS133
D9
1SS133
/S0
/S1
/S2
/S3
/S4
/S5
/S6
/S7
/S8
VCC
VCC
C1
0.1uF
C2
10uF/16V
C3
0.1uF
R
J
1
2
3
4
5
6
7
8
9
10
11
12
CN3
KEY_CN12 5597-12CPB
/S0
/S1
/S2
/S3
/S4
/S7 /S5
/S6
/S8
/S9
VCC
KS0
KS1
KS2
KS3
A
1
B
2
C
3
G2A
4
G2B
5
G1
6
Y7
7
GND
8
VCC
16
Y6
9
Y5
10
Y4
11
Y3
12
Y2
13
Y1
14
Y0
15
IC1
74HC138N
A
1
B
2
C
3
G2A
4
G2B
5
G1
6
Y7
7
GND
8
VCC
16
Y6
9
Y5
10
Y4
11
Y3
12
Y2
13
Y1
14
Y0
15
IC2
74HC138N
VLED
VCC
a
b
PLACE NEAR CONNECTER
FROM MAIN
a
b
C4
100uF/16V
C5
0.1uF
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
CN1
KEY I/F CN(40Pin)52045-4045
D10
1SS133
/S9
VCC
P
9
1
VLED
D11
1SS133
D12
1SS133
/S1
/S0
1 2 3 4 5 6 7 8 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
2
2
CN4
KEY_CN22 5597-22CPB
1 2 3 4 5 6 7 8 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
2
2
2
3
2
4
2
5
2
6
CN5
KEY_CN26 5597-26CPB
R16
47K*9(R16-R24)
R17
K
R
0
K
R
1
K
R
2
K
R
3
K
R
4
/
S
3
/
S
4
/
S
5
/
S
6
/
S
7
M
D
R
K
R
5
K
R
7
K
R
6
18
69
86
90
89
73
39 38
91
74
40
75
95
79
13 44
60
94
87
37
K
R
8
K
R
9
K
R
1
0
K
R
1
1
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
103
71
106
107 108
42
109
110 112 111
105
104
47
80
113
114 115 116 119
102
17
68
65
98 117
60
16
1SS133
(ER-A420 ONLY )
JUMPER (ER-A410)
/
S
0
/
S
1
/
S
2
VCC
/VON
/VON
/RESETP90
P90 /RESET
VLED
VLED
C6
100pF
/S9
D13
1SS133
(FLAT KEY ONLY )
R15
47K
R3
12K
R4
12K
R5
12K
R6
12K
R7
12K
R8
120
R9
120
R10
120
R11
120
R12
120
Q3 Q4 Q5 Q6 Q7
Q8Q9Q10Q11Q12
P91
KR[0..11]
KR[0..11]
R1
12K
R2
12K
R13
120
R14
120
Q1
KTA1271*7(Q1-Q7)
Q2
Q13Q14KRA101M*7(Q8-Q14)
P90
P91
KR0
KR1
KR2
KR3
KR6
P97
c
d
e
f
g
dp
/S3
/S4
/S6
/RESET
/S9
/RESET
P90
P91
/S9
/S3
/S4
c
d
e
f
g
dp
KR4
KR5
KR4
KR5
KR6
KR7
/S2
/S2
/S6
KS3
KS2
KS1
KS0
KR0S
KR1S
KR2S
KR3S
/VON
KR8
KR9
KR10
KR11
KR11
KR10
KR8
KR9
/VON
G1'
G2'
G3'
G4'
G5'
G6'
G7'
A'
B'
C'
D'
E'
F'
G'
DP'
POP UP
G1'
G2'
G3'
G4'
G5'
G6'
G7'
A'
B'
C'
D'
E'
F'
G'
DP' 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CN2
POP UP CN(15Pin)52806-1510
/S[0..6]
9 PIN :GND
10PIN : NC
KID65083AP
E
'
F
'
G
'
D
P
'
efg
d
p
/S[0..6]
G
7
'
1
8
1
IC3A
1
7
2
IC3B
1
6
3
IC3C
1
5
4
IC3D
IC3
B
'
C
'
D
'
bcd a
A
'
G
1
'
G
2
'
G
3
'
G
4
'
G
5
'
G
6
'
1
4
5
IC3E
1
3
6
IC3F
1
2
7
IC3G
1
1
8
IC3H
A
B
C
D
8 7 6 5 4
3
2 1
12345678
D
C
B
A
KEY I/F PWB
1/1
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