C7085-90921 Chapter 7 Troubleshooting 231
To turn off Lossy mode once the file has
printed, use the following commands:
ESC%-12345X@PJL
@PJL Default Diagnostics=OFF
@JPL Default Service Mode=EXIT
@PJL EOJ
ESC%-12345X@PJL
Note Putting the printer in Lossy mode
might affect performance and
print quality
49 FFFF
Description:
Issue reported by life test when replacing the fuser.
This error might also occur during the boot cycle.
Action:
Replace the formatter.
49FFOX
Description:
This error message allows you to scroll through the
printer control panel to obtain all of the error
information.
Action:
No action required.
49 OBOA
Description:
A request is not understood. This error message is
generated when the I/O card does not support a
command that was sent to it.
Action:
Check the command being sent; the I/O card might
not support a particular feature.
49 OB22
Description:
This error message is generated when the I/O card
receives a control panel menu action that it does not
recognize.
Action:
Verify the action being sent.
50.x Fuser Error
Description:
The fusing assembly contains two heating bulbs, two
thermo-switches, and two thermistors. AC power is
provided to the fusing assembly via the DC power
supply, which is controlled by the DC controller PCB.
The thermistors monitor the temperature of the
fusing assembly and provide feedback to the DC
controller PCB to regulate the fusing temperature.
The two thermo-switches are wired in series with the
fusing bulbs, and “open” if the temperature exceeds
240° C (464° F).
X Description:
1 Low temperature error
2 Fuser warm-up service
3 High fuser temperature
4 Faulty fuser
5 Fuser voltage mismatch (verify that you have
NOT installed a 110V fuser in a 220V printer or
vice-versa).
6 Fuser heater cutoff
7 Fuser motor malfunction (see recommended
action for 50.7 Fuser error)
Action:
Note To visually check if the fusing
assembly is functional, you can
defeat the rear door interlock
switch (see Figure 7-33). Press
in on the white plastic above the
left rear corner of the fan, then
turn on the printer. If the fusing
bulbs and thermo-switches are
good, you should observe light
from the lower fusing bulb as the
printer warms up.
1. Turn the printer off and on to reset the printer. If
the error persists, try re-installing the fusing
assembly. If the error continues to persist,
proceed to step 2.
2. Turn the power off and remove the fusing
assembly. Measure the resistance between pin
3 and pin 4. The resistance should be between
6+/-2 ohms. If there is no continuity between
pins, it can be assumed that either a heating
bulb and/or a thermo-switch is “open.” Replace
the fusing assembly. If resistance limits are
acceptable, proceed to step 3.
(Continued on next page)
Table 7-3 Numerical printer error messages (continued)
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