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Main Unit Theory of Operation Conveyance Section
2-93
II Composition/Operation
• 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 machine determines that
there is a media misfeed and stops operating.
15.3.9 Conveyance system media misfeed detection control
• A specific sensor is assigned for each section of the conveyance system to detect a
media misfeed that could occur along the path.
• When a media misfeed is detected, the machine suspends the print cycle and gives the
message “MEDIA JAM (magicolor 5430 DL/5440 DL)” or “PAPER JAM (magicolor 5450)”
on the panel. The machine thereafter attempts to detect any sheet of media left inside it.
Misfeed type Misfeed detection starting point Misfeed detection condition
Misfeed at vertical con-
veyance section
Lower Feeder Paper Feed Sensor
(PC3 PF: Tray 2) activated
PC4 not activated
PC3 PF: Tray 2 not deactivated
Lower Feeder Paper Feed Sensor
(PC3 PF: Tray 3) activated
PC4 not activated
PC3 PF: Tray 3 not deactivated
Misfeed at 2nd transfer
section
Synchronizing Roller Sensor (PC4)
activated
PC4 not deactivated
PC8 not activated
Synchronizing Roller Clutch (CL2)
activated
PC4 not deactivated
Misfeed at exit/fusing
section
Exit Sensor (PC8) activated PC8 not deactivated
Exit Sensor (PC8) deactivated PWB-E-DU not activated
Misfeed at Duplex Unit Duplex Unit Feed Sensor activated PC4 not activated
PWB-E-DU not deactivated
4138to2104c1
Lower Feeder Paper Feed
Sensor (PC3 PF)
Synchronizing Roller Sensor (PC4)
Synchronizing Roller/
Synchronizing Roller Clutch
(CL2)
Exit Sensor (PC8)
Duplex Unit Feed Sensor
(PWB-E-DU)
Paper Loop Sensor (PC6)
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