Sharp AR-M35 / AR-M450 (serv.man8) Service Manual ▷ View online
AR-350/450 BASIC PAPER FEED SECTION 2-1
[2] PAPER FEED SECTION
1. Composition of paper feed section
2. Paper feed operation
A. Preliminary operation except for the manual feed tray
1) Load paper and insert the tray, and the tray sensor will be turned on.
2) The lift-up motor rotates.
3) The upper limit sensor turns on.
3) The upper limit sensor turns on.
B. Paper feed operation
1) The take-up roller descends.
2) The take-up roller rotates to feed paper.
3) At the same time the paper feed roller rotates to feed paper to the transport section.
4) At that time, the separation roller rotates to prevent against overlapped feed.
4) At that time, the separation roller rotates to prevent against overlapped feed.
Name
Function
Remark
1
Take-up roller
Picks up paper and transports it to the paper feed roller.
2
Paper feed roller
Feed paper in the machine.
3
Separation roller
Rotates simultaneously with the paper feed roller to prevent against overlapped feed.
For the manual feed tray, the separation pad is used instead of the roller.
For the manual feed tray, the separation pad is used instead of the roller.
4
Paper upper limit sensor
Detects the top surface of paper and stops paper at the feed position.
Except for BPT
5
Paper sensor
Detects paper presence.
(Paper empty, upper limit detection: ON / Paper presence detection: OFF)
(Paper empty, upper limit detection: ON / Paper presence detection: OFF)
6
Paper width sensor
Detects the paper width in linkage with the paper guide.
Machine tray/MPT/
BPT
BPT
7
Paper length sensor PWB
Detects the paper length in linkage with the paper guide. For the manual feed tray, the
paper guide is not attached and detection is made with the actuator.
paper guide is not attached and detection is made with the actuator.
Except for BPT
8
Paper remaining quantity
sensor
sensor
Detects the remaining quantity of paper in each tray. (3 steps + paper empty)
Except for BPT
9
Lift-up motor
Lifts the paper feed base up to the paper feed position (upper limit detection position).
Except for BPT
1
3
4
2
5
6
9
1
2
3
7
"# $%&'(
AR-350/450 BASIC PAPER FEED SECTION 2-2
3. Paper size detection
A. Paper width detection VR (MPT/BPT/Machine tray)
Width detection is performed by calculating the voltage (A/D conversion value) of the slide VR in linkage with the side guide plate.
Paper width and paper size
(The range is set to Standard value ± 6 [mm].)
B. Paper length sensor (MPT/2nd and 3rd steps of 3-step paper feed desk)
Length detection is performed by combination of cassette size sensors 1 - 4.
Paper length and paper size
Width
detection
pattern
detection
pattern
Paper size
Standard value
(mm)
(mm)
Range (mm)
A
A3/A4
297.0
303.0- 291.0
B
WLT/LT
279.4
285.4 - 273.4
C
B4/B5
257.0
263.0 - 251.0
D
LG/LTR/Foolscap
215.9
221.9 - 209.9
E
A4R
210.0
216.0 - 204.0
F
Executive-R
184.1
190.1 - 178.1
G
B5R
182.0
188.0 - 176.0
Vertical size
detection
pattern
detection
pattern
Detection SW status
AB series size Inch series
size
Detection
width range
width range
Same range
size
size
CSS1
CSS2
CSS3
CSS4
1
ON
ON
OFF
ON
B5
EXTRA
147.0 - 198.0
Postcard
Monarch
Monarch
2
OFF
ON
OFF
ON
A4
LT
198.0 - 237.0
DBL P/C
C5
DL
C5
DL
3
OFF
ON
ON
ON
B5R
EX-R
237.0 - 274.0
COM-10
ISO-B5
ISO-B5
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
"# $%&'(
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
) "# $%&'(
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)
* "# $%&'(
Click on the first or last page to see other AR-M35 / AR-M450 (serv.man8) service manuals if exist.