Service manual

AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 28
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 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].)
(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.
Paper length and paper size
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.
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)
6 Lift-up motor Lifts the paper feed base up to the paper feed position (upper limit detection position). Except for BPT
Width detection
pattern
Paper size
Standard
value (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
CSS2
CSS1
CSS3
CSS4
Vertical size
detection pattern
Detection SW status
AB series
size
Inch series
size
Detection width
range
Same range
size
CSS1 CSS2 CSS3 CSS4
1 ON ON OFF ON B5 EXTRA 147.0 - 198.0 Postcard
Monarch
2 OFF ON OFF ON A4 LT 198.0 - 237.0 DBL P/C
C5
DL
3 OFF ON ON ON B5R EX-R 237.0 - 274.0 COM-10
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