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Conveyance Section Main Unit Theory of Operation
2-94
II Composition/Operation
• The “MEDIA JAM (magicolor 5430 DL/5440 DL)” or “PAPER JAM (magicolor 5450)” dis-
play is reset when all doors are closed after any of the doors has been open. At the same
time, the information on media left is cleared. Thereafter, the machine attempts to detect
any sheet of media left inside it again.
15.3.10 Control of detection of media left in conveyance system
• Any sheet of media left inside the machine is checked when the Power Switch is turned
ON or a door is opened and closed.
A. Sensor activation detection
• The machine checks sensors sequentially and, if a sensor is found to be activated, deter-
mines that there is a sheet of media left there inside the machine. Then, the machine
gives the message of “MEDIA JAM (magicolor 5430 DL/5440 DL)” or “PAPER JAM
(magicolor 5450)” on the panel.
• If all sensors are found to be deactivated, the machine proceeds to the step of “detection
of media left between sensors along 1-sided conveyance path.”
B. Detection of media left between sensors along 1-sided conveyance path
• The Paper Exit Roller, Fusing Pressure Roller, and Synchronizing Roller are turned in the
direction of feeding media out of the machine.
• If the Exit Sensor (PC8) is activated, the machine determines that there is a sheet of
media left and gives the message “MEDIA JAM TRANSFER ROLLER (magicolor 5430
DL/5440 DL)” or “PAPER JAM VERTICAL TRANS (magicolor 5450)” on the panel.
C. Detection of media left between sensors along 2-sided conveyance path
• If the machine detects that the Duplex Unit Feed Sensor on the Duplex Board (PWB-E
DU) is activated, it determines that there is a sheet of media left and gives the message
“MEDIA JAM DUPLEX UPPER (magicolor 5430 DL/5440 DL)” or “PAPER JAM
DUPLEX1 (magicolor 5450)” on the panel.
• If the machine detects that the Synchronizing Roller Sensor (PC4) is activated, it deter-
mines that there is a sheet of media left and gives the message “MEDIA JAM DUPLEX
LOWER (magicolor 5430 DL/5440 DL)” or “PAPER JAM DUPLEX2 (magicolor 5450)” on
the panel.
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