Service manual

IC BLOCK DIAGRAM
RC-SREV1
15
1 2 3 4 5 6 7 8 9
IN2 IN1
Vcc
OUT2
NC
GND
VS
OUT1
Vref
8
REG
Heat
protector
6
7
3
519
2
Vcc Vref
Vs
OUT1
OUT2
IN1 IN2
GND
M
MM74HC14SJX (XW104A00)
Hex Inverter
REM: IC2
MM74HC74ASJX (XY153A00)
Dual D-Type Flip-Flop
REM: IC23
MM74HC138SJX (XY353A00)
3 to 8 Demultiplexer
REM: IC10, 11
TC74ACT174F (XY938A00)
Hex D-Type Flip-Flop
REM: IC16, 26
MM74HC245ASJX (XW107A00)
Octal 3-State Bus Transceiver
REM: IC19
TC74AC273F (XR281A00)
Octal D-Type Flir Flop
REM: IC14, 15
SN75179BPSR (XT619A00)
Line DRIVER
REM: IC4
TA7291S (XF557A00)
Motor Driver DRIVER
REM: IC101–104
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
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
2PRPR
2Q
2QQ
Q
CLR
D
CK
PR
Q
Q
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
Q
Q
DC K C K
C K
DC K
GG
CLEAR
1Q
1D
2D
2Q
3D
3Q
GND
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8 9
Vcc
6Q
6D
5D
5Q
4D
4Q
CK
Q
D
GG
Q
DC K
G
C K
Q
D
G
Q
D
1
2
3
4
5
6
7
20
19
18
17
16
15
14
Vcc
G
B1
B2
B3
B4
B5
B6
B7
B8
8
9
10
12
11
GND
A8
A7
A6
A5
A4
A3
A2
A1
D1R
13
CLEAR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
VCC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLOCK
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
Q
DCK
CL
D
Q
CK
CL
Q
DCK
CL
D
Q
CK
CL
D
Q
CK
CL
Q
DCK
CL
D
Q
CK
CL
Q
DCK
CL
1
2
3
4
Vcc
R
D
GND
8
7
6
5
A
B
Z
Y
DIFFERENTIAL INPUT
OUTPUTS
VID 0.2V
-0.2V < VID < 0.2V
VID -0.2V
R
A-B
H
?
L
INPUTS
Receiver
Driver
D
OUTPUTS
Y
H
L
H
L
Z
L
H
H: "H" Level
L: "L" Level
?: incertitude