HP LaserJet 4345 Multifunction Printer series - 3‑bin mailbox output bins

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3-bin mailbox output bins

If you are using the 3-bin mailbox, three output bins are available. You can configure these
bins to act as individual mailboxes, or they can be combined as a single bin to stack
documents. You can set up these options in the CONFIGURE DEVICE menu, on the MBM-3
submenu. This menu is available only when the 3-bin mailbox is
installed. For more information about using the 3-bin mailbox, see

3-bin mailbox


The top two bins hold up to 100 sheets of paper. A sensor causes the MFP to stop when the
bin is full. MFP operation continues when you empty or reduce the amount of media in the

The lower bin holds up to 500 sheets of paper.