Sharp FO-1850, Service Manual

Page: 91 / 120

[2] IC signal name
CONTROL PWB UNIT
IC104: VHiNJM4558MF-(NJM4558M)
IC12: VHiNJM318M/-F (NJM318M)
IC102: VHiMC74H00F-(MC74HC00)
IC6: VHiS2B257SL70 (SRM2B257SL70)
IC10, 11: VHiMC14053DR2 (MC14053DR2)
6
11
10
9
12
13
2
1
Inhibit
Controls
14
15
Common
Out/In
5
Switches
In/Out
4
3
A
B
C
X0
X1
Y0
Y1
Z0
Z1
X
Y
Z
VDD: Pin 16
VSS: Pin 8
VEE: Pin7
Signal
A0~A12
CE1/CE2
WE
OE
I/O1~I/O8
VCC
GND
N.C.
Address input
Chip enable
Write enable
Write enable
Data I/O
Power source
Ground
No connection
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ1
DQ2
DQ3
GND
28
27
26
25
24
23
22
21
20
19
18
17
DQ5
DQ6
DQ7
DQ8
S1
A10
S2
A11
A9
A8
A13
W
VCC
(TOP VIEW)
16
15 DQ4
28P2W-C (CFP)
Pin name
1
2
3
4
8
7
6
5
–
+
OUTPUT 1
INVERTING INPUT 1
NON-INVERTING INPUT 1
VCC
VCC
OUTPUT 2
INVERTING INPUT 2
NON-INVERTING INPUT 2
-
–
+
+
1
2
3
4
8
7
6
5
–
+
TOP VIEW
BAL/COMP
INPUT
INPUT
V ¯
COMP –2
V
OUTPUT
BAL/COMP3
+
14 13 12 11 10 9
1 2 3 4 5 6
1A 1B 1Y 2A 2B 2Y
VCC 4B 4A 4Y 3B 3A
8
3Y
7
GND
FO-1850TH
8 – 4