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[g] Original set detector (DED), original width sensor (DWS) input circuit
TLP1215(C1)
Original set
Constant voltage
power
sensor
DSD
TLP1217(C2)
Original width
Constant voltage
power
sensor
DWS
This circuit is used to input each sensor signal. The noise filter is composed of C and R. Both sensors use a photo interrupter which is integrated
with the LED and the photo transistor. The original set detector signal is inputted to IC13 53 pin, and the original width sensor signal is inputted to
IC13 54 pin.
[h] Open/close switch (AUOD, FGOD, TOD) input circuit
ADF open/close switch
CN2 7-1
(AUOD)
CN2 7-2
CN2 4-1
Paper feed guide open
/close switch (FGOD)
CN24-2
Reverse guide open
CN28-1
/close switch (TGOD)
CN2 8-2
This circuit is used to detect open/close of the ADF unit, the paper feed guide, and the reverse guide. It is connected with three microswitches. Each
switch is closed by closing the switch section. They are connected in series from the +24V to directly turn on/off the power to each drive section.
That is, only when all three switches are closed, the power is supplied to the drive section. When the ADF open/close switch is turned on, +24V is
applied to the cathode of ZD6 and the base current is supplied to Q13 through R64, conducting Q13 and the open/close signal (close in this case) is
inputted to IC13 60 pin.
The other open/close switches operate similarly, and each open/close signal is inputted to IC13.
R121 and C35 form the snubber circuit which absorbs an induced voltage generated when the open/close switch is opened during rotation of the
DC motor.
CN20
DF11-28DP-2DSA
1
17
VCC
CN1.17
+5V
2
18
VOUT
CN1.18
DSD
3
19
GND
CN1.19
SGND
Original sensor input circuit
CN15
DF11-28DP-2DSA
22
VCC
CN1.22
+5V
21
VOUT
CN1.21
DWS
20
GND
CN1.20
SGND
Original width sensor input circuit
DC+24V
3
3
DC+24V
CN3-3
DC+24V
4
4
AU0D
CN3-4
AU0D
B8P-VH
1
1
AU0D
CN5-1
AU0D
2
2
FGOD
CN5-2
FGOD
5
5
FGOD
CN3-5
FGOD
6
6
TGOD
CN3-6
TGOD
Open/close switch input circuit
+5V
1
R61
+5V
4.7K
CRG10G472J
2
R51
1
2
4.7K
CRG10G472J
GND
C9
3300pF
CRM40B332K50PT
+5V
R60
1
+5V
4.7K
CRG10G472J
2
R58
1
2
4.7K
CRG10G472J
GND
3300pF
CRM40B332K50PT
C
ZD6
R6 4
B
Q13
ZD5
E
B
+24V
ZD4
R121
+
C3 5
PGND
– 26 –
TP32
R22
1
2
1
4.7K
CRG10G472J
1
2
GND
TP33
R7
1
2
1
4.7K
CRG10G472J
C8
1
2
GND
+5V
R32
C
Q12
C
E
B
Q11
E
G/A
53
P0/MP0
54
G/A
P1/MP1
R2 6
R2 4
TP14
AU0D
TP13
FGOD
TP12
TGOD
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