Sharp ER-A520 - Scale Entry Procedures

ER-A520U/ER-A530U CIRCUIT DIAGRAM AND PWB LAYOUT
– 27 –
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
6/7
OPTION RAM CONNECTOR / PRINTER CONNECTOR / DRAWER
TO OPTION RAM PWB TO PRINTER PR58HM
RIGHT-ANGLE CON
DRAWER1 DRAWER2
RIGHT-ANGLE CON
OPTION STANDARD
UP-S02MB
EFCB322513TS X 25
A16 WR# A3 A8 A14 A20 A21 VDD A4 A9 A13 A18 RAMCS3# A19 A2 A5 A12 A15 A17 RD# A10 A1 A7 A11 A6 A0 D7 D6 D2 D3 D0 D4 D1 D5
A[0..21]1,2,3
D[0..7]1,2,3
RD#1,2
DRAWER21 DRAWER11
DSEN 1
RAMCS3#2
WR#1,2,3
JPFB#4
VH4
JPES#4 STRB2#1,4 RPfB#4 VRCOM4 PHUPS14 SO1
SI1
VJCOM4 JPFC#4 PCLK1 VH4 TM14 STRB1#1,4 RPFC#4 RPFA#4 FVHS4 STRB3#1,4 JPFA#4 JPFD#4 LATCH#1 STRB4#1,4 RPES#4 RPFD#4
VCC
VDD
VCC
+24V
FB8
D19
1SS355
FB4
R151
1.8K
R154 47K
CN7 5046-03A 1 2 3
Q5 2SD2143
FB30
BFR601009C8NG
FB21 FB13 FB17 FB9
F3
T400mA/250V
FB5
R153 10K
R152
1.8K
C125 1000pF
FB14 FB22
+
C136
22uF/16V
FB18
CN6 5046-03A 1 2 3
FB10
C124 0.1uF
FB25 FB6 FB24
CN5 T_PRINTER CN(40Pin)00 6229 640 003 800
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
R165
C122 0.1uF
CN4 OPTION RAM STACK CN.35774-4050
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
C121 0.1uF
R164
FB28
BFR601009C8NG
D18
1SS355
FB29
BFR601009C8NG
FB19 FB11
R155 2.2K
FB26 FB15 FB7 FB3
Q4 2SD2143
D13
1SR154-400
+
C137
22uF/16V
C123 0.1uF
FB23
D12
1SR154-400
FB20 FB12
FB31
BFR601009C8NG
FB27 FB16