Paper Feed Operation; Paper Size Detection; Paper Width Detection Vr - Sharp AR-M455N Service Manual

Name
1 Take-up roller
2 Paper feed roller
3 Separation roller
4 Paper upper limit sensor
5 Paper sensor
6 Lift-up motor
C. Operational descriptions

[Paper feed operation]

(1) 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.
(2) 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.
Paper length and paper size
Vertical size
detection pattern
CSS1
1 ON
2 OFF
3 OFF
4 OFF
5 ON
6 ON
7 ON
0 OFF
AR-M355N/M455N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 28
Picks up paper and transports it to the paper feed roller.
Feed paper in the machine.
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.
Detects the top surface of paper and stops paper at the feed position.
Detects paper presence.
(Paper empty, upper limit detection: ON / Paper presence detection: OFF)
Lifts the paper feed base up to the paper feed position (upper limit detection position).
Detection SW status
CSS2 CSS3
ON OFF
ON OFF
ON ON
OFF ON
OFF ON
OFF ON
ON ON
OFF OFF
Function

[Paper size detection]

(1) Paper width detection VR (MPT/BPT/Machine tray)
Width detection is performed by calculating the voltage (A/D con-
version 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].)
Width detection
Paper size
pattern
A A3/A4
B WLT/LT
C B4/B5
D LG/LTR/Foolscap
E A4R
F Executive-R
G B5R
(2) 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.
CSS1
CSS3
AB series Inch series
size size
CSS4
ON B5 EXTRA
ON A4 LT
ON B5R EX-R
ON A4R LTR
ON Foolscap Extra
OFF B4 LGL
OFF A3 WLT
OFF Tray not installed
Remark
Except for BPT
Except for BPT
Standard
Range (mm)
value (mm)
297.0 303.0- 291.0
279.4 285.4 - 273.4
257.0 263.0 - 251.0
215.9 221.9 - 209.9
210.0 216.0 - 204.0
184.1 190.1 - 178.1
182.0 188.0 - 176.0
CSS2
CSS4
Detection width Same range
range size
147.0 - 198.0 Postcard
Monarch
198.0 - 237.0 DBL P/C
C5
DL
237.0 - 274.0 COM-10
ISO-B5
274.0 - 314.0
314.0 - 347.0
347.0 - 389.0
389.0 - 432.8