Parts - Pioneer C-AX10 Service Manual

C-AX10

7.2 PARTS

7.2.1 IC
• The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
•
List of IC
TC74VHC257FT, TC74VHC244F, TC7WT74FU, TC74VHC4040FT,
DF1704E, BC4094BCFV,
TC74VHC257FT (DSP ASSY : IC1505)
• Quad 2-Channel Multiplexer (3-state)
•
Block Diagram
SELECT 1
1A 2
1B
3
5
2A
2B
6
3A 11
3B 10
4A 14
4B 13
OE 15
TC74VHC244F (DSP ASSY : IC1506)
• Octal Bus Buffer
•
Pin Arrangement (Top view)
1
1G
1A1 2
2Y4 3
1A2 4
2Y3 5
6
1A3
7
2Y2
8
1A4
2Y1 9
GND
10
96
TC7W126FU, AT24C16N-10SI2.5, M30622SFP,
4 1Y
2Y
7
3Y
9
4Y
12
20
Vcc
19 2G
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
2A1
11
TC74VHC153FT, TC74VHC157F, TC74VHC163FT,
M38079SFP,
•
Truth Table
INPUTS
OUTPUTS
OE SELECT A B
H X X X
L L L X
L L H X
L H X L
L H X H
X : Don't Care
Z : High Impedance
•
Truth Table
INPUTS OUTPUTS
G An Yn
L L L
L H H
H X Z
X : Don't Care
Z : High Impedance
Yn : TC74VHC244F
AK5393VS
Z
L
H
L
H