Sharp ER-A520 - Successive Multiplication Entries

ER-A520U/ER-A530U CIRCUIT DIAGRAM AND PWB LAYOUT
– 24 –
A B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A A
B
C D
87654
3
21
12345678
D C
B A
3/7
LCD I/F / KEY I/F
VCC:20pin GND:10pin
D[0. .7]
KEY I/F R ELAY CN
*IC 14
TO POP UP & KEY I/F
g
KR6 LS2
a
f
LRS
c
KS0 LS3 KS2
e
LS1
LR/W#
KR8
g
a
c d
KS1
dp
D[0..7]
VCC
KR0 KR3 FSR#
d
b
KR4
dp
KR7 LS0 KR1 KR2
GND
e
LE
MODE#
f
b
KR5 KR9
D0
D5
D4 D3 D0
D4
D2
D3
D1 D7 D2
D6
D4
D2 D1 D0
D6
D7
D6 D5
DB[0..7]
D1 D5 D3
D7
DB7
DB4
DB3
DB5 DB7
DB6
DB1 DB4
DB5
DB0 DB2
DB3
DB3 DB2
DB0
DB7
DB6
DB1
DB5
DB2 DB6
DB0
DB4
DB1
KS3 M_RESET#
KS01
FSR#1
A01,2,6
KR4#1
LE1
DATALE1
KS31
WR#1,2,6 A23#1,2
KR6#1
LCDON1
KR5#1
LEDS01 LEDS21
BLON1
LEDS31
KR7#1
LRS1
A221,2
LEDS11
LR/W#1
KR0#1
KS21
KR8#1 KR9#1
A211,2,6
KR1#1
KS11
MODE#1
D[0..7]1,2,6
KR2#1
A201,2,6
KR3#1
M_RESET#1
RES# 1,2 POFF# 1,2
VCC
VCC
VCC
VCC
VCC
VCC
VLED
VLED
VCC
VCC
C76
100pF
C80
100pF
IC12 74HC273
3 4 7 8
13 14 17 18 11
1
2 5 6 9 12 15 16 19
D1 D2 D3 D4 D5 D6 D7 D8 CLK CLR
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8
R106
10K
C82
0.1uF
+
C81
22uF/16V
R110
2.4KF
C73
0.1uF
R111 12K
C78
0.1uF
+
C77 10uF/50V
IC7C 74LV08
9 10
8
IC16
74HC245
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
DIR A1 A2 A3 A4 A5 A6 A8 GND A7
VCC
1G
B1 B2 B4 B3 B5 B6 B7 B8
+
C72 10uF/50V
R109
10K
+
C79
22uF/10V,OS
CN1
52045-4045
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
R108 10K
IC15 BA00ASFP
2 1
4 5
3
C75
0.1uF
R107 5.6K
CN2
LCD CN(16Pin)5483-16X
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
IC14
74HC138
1 2 3 4 5 6 7 8
16 9 10 11 12 13 14 15
A B C G2A G2B G1 Y7
GND
VCC
Y6
Y5 Y4 Y3 Y2 Y1 Y0
+
C74
10uF/50V
IC13
74HC374
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
QE
Q0 D0 D1 Q1 Q2 D2 Q3 GND D3
VCC
Q7
D7 D6
Q5 Q6
D5 D4
Q4
LE
C71 0.1uF