Service manual

11
ICP1
■ IC BLOCK DIAGRAM（IC ブロック図）
TC74VHC08FT (XV891A00)
Quad 2 Input AND
DM: IC102
TC74VHC74FT (XV892A00)
Dual D-Type Flip-Flop
DM: IC302
1
2
3
1A
1Y
4 2A
5 2B
6 2Y
7
VSS
1B
14
13
12
VDD
4A
11 4Y
10 3B
9 3A
8 3Y
4B
INPUTS OUTPUTS
PR CLR CLK D Q Q
L
H
H
L
H
Q
O
H
L
H
H
L
Q
O
X
X
X
H
L
X
X
X
X
f
f
L
H
L
L
H
H
H
L
H
L
H
H
H
1
2
3
4
5
6
7
1CLR
1D
1CK
1PR
1Q
1Q
GND
14
13
12
11
10
9
8
VCC
2CLR
CLR
2D
D
2CK
CK
2PR PR
2Q
2Q
Q
Q
CLR
D
CK
PR
Q
Q
TC74VHC14FT (XV890A00)
Hex Inverter
DM: IC304
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
GND
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
TC74VHC138FT (XZ495A00)
3 to 8 Demultiplexer
DM: IC401
1
2
3
4
5
6
7
A
A
Select
Enable
Output
Output
B
B
C
C
G2A
G2A
G2B
G2B
G1
G1
Y7
Y7 Y5
Y4
Y3
Y2
Y1
Y0
Y6
16
15
14
13
12
11
10
Vcc
YO
Y1
Y2
Y3
Y4
Y5
8
GND
9
Y6
TC7WH04FU (XY363A00)
Triple Inverter
DM: IC101
1
2
3
4
8
7
6
5
1A
GND
3Y
2A
Vcc
2Y
1Y
3A
NJM4558M-DTE2 (XV130A00)
Dual Operational Amplifier
DM: IC301
1
2
3
4-V
8
7
6
5
Output A +V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
3
Capacitor
6
Power supply
5
Input
Ground
4
2
1
Switch-Collector
Switch-Emitter
S
R
Q
+
Driver
8
7
Peak current detect
Generator
Comparator
1.17V
reference
voltage
M5291FP-600C (XR858A00)
DC-DC Converter
DM: IC303
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