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(4) 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
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
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
74LS151
S2
CSD 0
CSD 1
CSD 2
+5V
HC04
24K
DTA123YS
+5V
HC04
24K
SEL B
+5V
CSD1
I/O
SW602
4.7K
4.7K
POD
CPU
GP1S53
MAIN LS151
TMOTOR2 LS151
TMOTOR3 LS151
SEL C
+5V
1K
4.7K
I/O
PPD1
GP1S53
4.7K
CSD
(5) 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 speci-
fied level, the operation of each circuit is stopped to prevent against
malfunctions.
S2
5V2
C5
C42
470µ F
22000PF
10V
12 – 11
24K
24K
10K
24K
22K
2.2K
DTA123YS
10K
24K
22K
2.2K
DTA123YS
PNC
24K
24K
5V2
R8
2.7KJ
IC13
1
VCC
/RESET
2
5
NC
GND
4
3
CAP
M51953BL
C4
1µ F
10V
+5V
S2
HC04
+5V
S0
HC04
+5V
S1
HC04
+5V
S0
HC04
+5V
S1
HC04
+5V
S2
HC04
RES ET
63
CPU
(IC 6)
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