Advertisement
(3) Detector circuit of sensor signal
The LS151 selects one signal of D0 ∼ D7 according to the combina-
tion of SEL A ∼ C signals (H, L) and outputs it to Y.
Selection of D0 ∼ D7 for SEL A ∼ C is made as shown in the table
below.
SEL C
SEL B
SEL A
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
4
D0
3
D1
2
D2
1
D3
15
D4
14
D5
13
D6
12
D7
11
SEL A
A
10
SEL B
B
9
SEL C
C
7
G
74LS151
The sensor signal is in the following composition with the matrix of
SEL A ∼ C and S0 ∼ 2.
S0
S1
SEL A
PED1
—
⁄
A
SEL B
SW
POD
B
SEL C
PPD1
PNC
SEL A
+5V
1K
4.7K
I/O
10K
22K
2.2K
DTA123YS
PE1
EE-SX1042
CSD0
SW601
MOTOR PWB 2 LS151
MOTOR PWB 3 LS151
Y
0
1
2
3
4
5
6
7
IC15
5
Y
CPU
S2
CSD 0
CSD 1
CSD 2
+5V
HC04
24K
+5V
HC04
24K
SEL B
+5V
CSD1
I/O
SW602
4.7K
4.7K
22K
POD
GP1S53
MAIN LS151
TMOTOR2 LS151
TMOTOR3 LS151
SEL C
+5V
1K
4.7K
I/O
22K
PPD1
GP1S53
4.7K
CSD
(4) Start/stop control circuit
This circuit detects ON/OFF of the power and controls start/stop of
S0
the circuits.
The DC power section provides each power voltage (VH=+32V,
+24V, VC=+1-V, VD1=5V, VD2=5V).
When the power voltage reaches the specified level, the operation of
each circuit is started. Before the paper voltage falls below the
specified level, the operation of each circuit is stopped to prevent
against malfunctions.
S2
5V2
C5
C42
470µ F
22000PF
10V
12 – 8
+5V
24K
+5V
24K
+5V
10K
24K
2.2K
DTA123YS
+5V
10K
24K
2.2K
DTA123YS
+5V
PNC
24K
+5V
24K
5V2
RESET
R8
IC13
2.7KJ
1
VCC
/RESET
2
5
NC
GND
4
3
CAP
M51953BL
C4
1µ F
50V
S2
HC04
S0
HC04
S1
HC04
S0
HC04
S1
HC04
S2
HC04
63
CPU
(IC 6)
Advertisement
