Media Size Error Detection Control - Konica Minolta magicolor 5550 Service Manual

Theory of operation Ver. 1.0 Nov. 2006
19.3.8

Media size error detection control

• To prevent incorrect printed pages, the size of the media being conveyed is detected
using the registration sensor and media feed sensor.
• The length of the media is detected based on the value calculated using the period of
time that begins when the sensor is activated and ends when it is deactivated for each
media source.
• For the lower feeder unit, even if the media feed sensor does not detect a media size
error, the downstream registration sensor makes an error check again.
Media source
Tray 1
Tray 2
Tray 3
(Lower feeder unit)
Tray 4
(Lower feeder unit)
Duplex unit
• If there is a mismatch between the media size setting and the results of media size
detection, the main body suspends the print cycle and displays the message or "PAPER
ERROR" on the panel.
• The media that has caused size error is fed out of the main body after going through the
2nd transfer and fusing processes.
• The subsequent sheets of media are subjected to the following operation.
Media state
Media type error
Yet to be printed
Printed
Subsequent
sheets
Yet to be printed
Printed
• The size error display can be reset when the power switch is turned OFF and ON, or by a
reset command (media size error reset).
• If a media size error is detected during 2-sided printing, the main body determines that
there is a media misfeed and stops operating.
Media length detection
sensor
Registration sensor (PS4)
Registration sensor (PS4)
Media feed sensor
(PS2: Tray 3)
Registration sensor (PS4)
Media feed sensor
(PS2: Tray 4)
Registration sensor (PS4)
No media length is detected.
Feed operation
Yet to be
fed
Fed
19. Conveyance section (Registration roller)
Starting point
Registration roller clutch
CL2: ON
Registration roller clutch
CL2: ON
Media feed sensor PS2:
ON
Registration roller clutch
CL2: ON
Media feed sensor PS2:
ON
Registration roller clutch
CL2: ON
Print operation
Feed Print
Suspend Suspend
Feed Print
Feed Print
Feed Print
Ending point
Registration sensor
PS4: OFF
Registration sensor
PS4: OFF
Media feed sensor PS2:
OFF
Media feed sensor PS2:
OFF
Media feed sensor PS2:
OFF
Media feed sensor PS2:
OFF
Exit operation
Exit
Suspend
Exit
Exit
Exit
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