Sharp AR-P350 / AR-P450 (serv.man6) Service Manual ▷ View online
AR-350/450 BASIC PAPER FEED SECTION 2-3
C. Paper detection method of each tray
1) Machine 1st tray
Paper detection is performed by VR in linkage with both side guides.
2)Multi-purpose tray
Paper detection is performed by VR in linkage with both side guides and the detector in linkage with the rear edge plate.
Paper detection is performed by VR in linkage with both side guides and the detector in linkage with the rear edge plate.
For the other than above, the paper size is considered as "Extra."
3) 2nd and 3rd steps of 3-step paper feed tray
Paper detection is performed by the detector in linkage with the rear edge plate.
Paper detection is performed by the detector in linkage with the rear edge plate.
Paper size for automatic detection
4) Manual feed tray
Paper detection is performed by VR in linkage with both side guides and the detector on the tray.
Paper size
Width detection pattern Vertical detection pattern
B5
C
1
A4
A
2
B5R
G
3
A4R
E
4
Foolscap
D
5
B4
B
6
A3
A
7
LT
B
2
EX-R
F
3
LTR
D
4
LGL
D
6
WLT
B
7
Vertical size
detection
pattern
detection
pattern
Detection SW status
AB series size Inch series
size
Detection
width range
width range
CSS1
CSS2
CSS3
CSS4
1
ON
ON
OFF
ON
B5
EXTRA
147.0 - 198.0
2
OFF
ON
OFF
ON
A4
LT
198.0 - 237.0
3
OFF
ON
ON
ON
B5R
EX-R
237.0 - 274.0
4
OFF
OFF
ON
ON
A4R
LTR
274.0 - 314.0
5
ON
OFF
ON
ON
Foolscap
EXTRA
314.0 - 347.0
6
ON
OFF
ON
OFF
B4
LGL
347.0 - 389.0
7
ON
ON
ON
OFF
A3
WLT
389.0 - 432.8
0
OFF
OFF
OFF
OFF
Tray not installed
CSS2
CSS1
CSS3
CSS4
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AR-350/450 BASIC PAPER FEED SECTION 2-4
4. Paper remaining quantity detection
A. Paper remaining quantity detection
Paper remaining quantity detection is common in each tray except for the manual feed tray. Remaining quantity is indicated in 3 steps plus paper empty
(4 steps in total).
(4 steps in total).
B. Detection method
Paper remaining quantity is detected by the number of times of changing of the remaining quantity sensor from when the tray starts lifting up to when
the upper limit sensor turns on.
Remaining quantity sensor status change when the tray is moving up and remaining quantity
Indication of remaining
quantity
quantity
Sensor status
Paper quantity: 100%
Paper quantity sensor: OFF
Paper quantity: 66%
Paper quantity sensor: ON
Paper quantity: 33%
Paper quantity sensor: OFF (2nd time)
Paper quantity: 0%
Paper sensor: OFF
Paper empty is detected by
the paper empty sensor.
the paper empty sensor.
1/3 area
sensor logic LOW
sensor logic LOW
2/3 area
sensor logic HIGH
sensor logic HIGH
3/3 area
sensor logic LOW
sensor logic LOW
When paper empty is detected
Paper remaining quantity at 1/3
Paper remaining quantity at 2/3
Paper remaining quantity at 3/3
Rotating plate
MCPED
(Paper empty sensor)
(Paper empty sensor)
Paper remaining quantity
detection actuator
detection actuator
MCSPD
(Paper remaining quantity sensor)
(Paper remaining quantity sensor)
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AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-1
[3]PAPER TRANSPORT PATH AND PAPER EXIT
1. Paper transport path with an option installed
A.
B.
Option
Model name
Desk
AR-D13
Duplex unit
AR-DU4
Finisher
AR-FN6
Option
Model name
Desk
AR-D13
Duplex unit
AR-DU3
Finisher
AR-FN7
Male bin stacker
AR-MS1
Punch unit
AR-PN1
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AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-2
C. Paper transport in duplex printing (with AR-DU3/DU4 installed)
(1) Switchback operation and paper exit to the left tray
1) Paper transported from the fusing section is sent to the paper exit section of the machine.
2) When the male bin stacker (AR-MS1) or the finisher (AR-FN5) is installed, the paper entry gate solenoid (FGS) selects the paper entry gate to
2) When the male bin stacker (AR-MS1) or the finisher (AR-FN5) is installed, the paper entry gate solenoid (FGS) selects the paper entry gate to
discharge paper outside the machine.
3) The paper exit sensor (POD2) detects the rear edge of paper, and the paper exit motor (DCBM) is rotated reversely.
4) Paper is taken into the machine again, passed over the reverse gate, and transported to the duplex unit.
5) When duplex printing is made, the ADU gate solenoid switches to the upper side of the ADU paper exit gate to switch the paper path to the ADU.
6) When paper is discharged to the left tray or when paper is transported to the console finisher (AR-FN7), the ADU gate solenoid switches to the
upper side of the ADU paper exit gate to switch the paper path to the ADU.
(2) Paper transport speed in duplex printing
The transport speed may be doubled in duplex printing depending on the paper position.
The positions of double speed are as follows:
The positions of double speed are as follows:
1) From when the rear edge of paper passes the fusing section to when switchback operation is started.
2) From switchback operation, after the lead edge of paper passes APPD1, until a certain amount is transported.
3) After that, paper is stopped at the ADU paper feed position, and fed to the laser printer again.
3) After that, paper is stopped at the ADU paper feed position, and fed to the laser printer again.
D. Transport with AR-FN6 installed
The AR-FN6 is provided with the decurler to improve alignment capability of finishing.
The decurler makes decurling against curling of paper by means of the difference in rigidity of the upper roller (metal) and the lower roller (sponge).
Metal
Sponge
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