Service Manual

iC33
IC 74HC157 SOP
Parts No. : 314-0634
II Top View
IC34
IC UPC78L05T CHIP
Parts No. : 313-5323
II Top View
IC35
1. OUTPUT
2. COMMON
(SHIELD
PLATE)
3.1NPUT
IC S-80723AN-DL CHIP
Parts No. : 313-5328
•Top View
0 0 0
2 3
Y1 Y2
4 7
IC TA78L05F CHIP
Parts No. : 313-5323-01
1. OUT
2.VDD
3. vss
liD
escnptron
No.
Name
Function
I SEL Common data select input
2 AI Data inputs from source
0
3
81 Data inputs from source 1
4
Yl Multiplexer outputs
5 A2 Data inputs from source
0
6 82
Data inputs from source I
7
Y2
Multiplexer outputs
8
GND Ground (OV)
9 Y3
Multiplexer outputs
10
83
Data inputs from source 1
Data inputs from source
0
Y3
Y4
9
11 A3
12
12
Y4
Multiplexer outputs
13
84
Data inputs from source I
14 A4
Data inputs from source
0
15
G
Enable input (active
LOW)
16
Vee
Positive supply voltage
r---------------------~
I
I
I
I I
L---------------------~
-62-