Control panel message Description Recommended action
back to the first program and try printing
a different file. If the message appears
only with a certain software program or
print job, contact the software vendor for
assistance.
6. If the message persists, contact
HP Support.
50.1 FUSER ERROR AC power is not being provided to the fuser
assembly. AC voltage is necessary to
generate heat in the fuser assembly.
1. Verify that the fuser power cable at the
back of the device is connected and the
ECU is fully seated.
2. If the message persists, replace the
fuser assembly.
50.6 FUSER ERROR The main or sub thermistors are unable to
provide temperature feedback to the ECU.
The main and sub thermistors monitor the
fuser assembly hot-roller temperature and
provide feedback to regulate the fusing
temperature.
1. Verify that the seven-wire connector is
firmly seated in connector J405 on the
ECU. You might have to remove the
main cooling fan to see this connection.
2. Verify that the four-wire connector at the
rear of the device is firmly seated in the
fuser assembly.
3. Verify that the AC voltage is being
provided to the fuser assembly.
4. If the message persists, replace the
fuser assembly.
51.XY ERROR
alternates with
To continue turn off then on
A device error has occurred. 1.
Press
to continue or press for
more information.
2. If the message persists after exiting
help, turn the device off and then on.
3. If the message persists, contact
HP Support.
52.00 ERROR A scanner motor error has occurred. Scanner
motor rotation is verified at the initialization of
a print job.
1. Verify that the scanner motor connector
and the ribbon cable from the ECU are
firmly seated on the laser/scanner
assembly.
2. Verify that the scanner motor connector
is firmly seated in connector J402 on the
ECU. You might have to remove the
main cooling fan to see this connection.
3. Verify that the ribbon cable installed in
connector J403 on the ECU is fully
seated. (See
Figure 6-9 ECU wiring
on page 195.) You must remove the
ECU in order to verify this connection.
4. If the message persists, replace the
laser/scanner assembly.
53.10.01 ERROR UNSUPPORTED RAM The memory DIMM is not a supported DIMM. Install a supported DIMM. See Install
memory on page 26.
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