Control panel message Description Recommended action
Corrupt Firmware In External Device The MBM needs a firmware upgrade. 1. Go to http://www.hp.com/support to
download the latest firmware and
review the upgrade procedure.
2. Install the latest firmware on the device.
3. If the new firmware does not correct
the problem, replace the MBM unit.
Output Bin <X> Full The control panel indicates that the output
bin is full; however, there is no paper in the
output tray.
The signal is generated by sensor PS1503
(bin 1 delivery-full sensor), PS1505 (bin 2
delivery-full sensor), or PS1507 (bin 3
delivery-full sensor). Sensors PS1503 and
PS1505 are located behind the front cover
of the MBM. Sensor PS1507 is located
above the bin 3 delivery rollers, close to the
MBM rear frame.
1. Bins 1 and 2: Verify that the upper Y-
shaped sensor actuator arms are
actually activating the associated
sensors. The bin 1 and bin 2 bin-full
sensors are the left sensors of the
sensor set.
Verify that the output flappers used to
actuate the sensor are actually
activating sensor PS1507 and have
the full range of motion needed to
actuate the sensor.
2. Check the sensor flag actuator arms
for free, quick, and unobstructed
movement when rising and falling.
3. Clean the problematic sensor by
gently blowing air into the sensor.
4. Check the problematic sensor to make
sure it is mounted properly and is in
correct alignment with the sensor flag
(not touching the sides of the plate).
5. For bins 1 and 2, check the wiring
connector at the sensor board as well
as connector J1502 on the MBM
driver board.
6. If none of the above corrects the
problem, replace the MBM driver board.
7. If none of the above corrects the
problem, replace the MBM unit.
Output Paper Path Open The control panel indicates that the MBM is
not latched to the MFP; however, it is
physically attached to the MFP.
This signal is generated by switch SW1501
(engine-connection switch). Switch
SW1501 is located behind the front cover,
near the bottom of the MBM. This switch is
actuated by a tab on the MFP that engages
the actuation arm on the MBM when the
MBM is moved against the MFP and they
become latched together.
1. Verify that the MBM is latching
properly to the MFP.
2. Inspect the actuator tab on the MFP
for damage.
3. Remove the front cover of the MBM
and inspect SW1501 and the actuator
assembly for damage or mounting
problems. If either is damaged beyond
repair, go to step 5.
4. Check wiring connection J1502 on the
MBM driver board.
5. If none of the above corrects the
problem, replace the MBM unit.
ENWW Solve 3-bin mailbox problems 453
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