User Guide

IPTU jam detection
The IPTU is equipped with paper detection sensors to detect the presence of paper and to determine
operational status:
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Top of page sensor (SR8301)
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Delivery sensor (SR8302)
The CPU on the IPTD PCB determines a paper jam by checking whether paper is present at the
sensors at the checking timing. The checking timing is stored in the memory of the CPU. If the CPU
determines a jam, it stops the intermediate paper transfer operation and notifies the MFP of the jam.
Pickup delay jam
The CPU determines a pickup delay jam when the top-of-page sensor (SR8301) does not detect the
paper within the specified period after the cassette pickup solenoid (SL2) or the MP tray pickup
solenoid (SL1) is turned ON.
Pickup stationary jam
The CPU determines a pickup stationary jam when the top-of-page sensor (SR8301) does not detect
the trailing edge of the paper within the specified period after the top-of-page sensor (SR8301)
detects the leading edge.
Delivery delay jam
The CPU determines a delivery delay jam when the delivery sensor (SR8302) does not detect the
leading edge of the paper within the specified period after the top-of-page sensor (SR8301) detects
the trailing edge.
Delivery stationary jam
The CPU determines a delivery stationary jam when the delivery sensor (SR8302) does not detect
the trailing edge of the paper within the specified period after the top-of-page sensor (SR8301)
detects the trailing edge.
3-bin mailbox
When the 3-bin mailbox (MBM) is installed, it receives printed media from the print engine and
delivers it to one of its three bins. The 3-bin mailbox has the following components:
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One feed motor that drives the rollers
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Two solenoids that operate the inlet deflector and the bin deflector
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Six sensors that detect the presence of print media and the stack height in the output bins
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One switch that determines whether the 3-bin mailbox is attached to the MFP correctly
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One fan that cools components inside the 3-bin mailbox
The 3-bin mailbox has three operating modes: stacker mode, mailbox mode, and function separator
mode.
The MBM driver PCB controls all functions in the 3-bin mailbox. To deliver media to the different
bins, the inlet deflector and the bin deflector change position as required.
228 Chapter 5 Theory of operation ENWW