Troubleshooting 225
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Reset All
All printer settings have been reset to the default configuration, 
or to the last settings that were saved.
Reset to Save
A control panel menu setting was changed while the printer was 
printing. Press the N Start/Stop button to clear this message. The 
setting will become effective after printing has finished.
Alternatively you can clear this message by performing Reset or 
Reset All on the control panel. However, the print data will be 
deleted.
ROM CHECK
The printer is checking the ROM.
Self Test
The printer is currently performing a self test and initialization.
Service Req Cffff
A controller error or a print engine error has been detected. Turn 
off the printer. Wait at least 5 seconds, then turn it back on. If the 
error message still appears, write down the error number listed 
on the LCD panel (Cffff), turn off the printer, unplug the power 
cord, then contact a qualified service representative.
TonerCart Error uuuu
A read/write error has occurred for the indicated toner cartridges 
(The letters C, M, Y, or K appear in place of uuuu and indicate the 
colors Cyan, Magenta, Yellow, and Black respectively.). Remove 
the toner cartridges and reinsert them. If that fails to clear the 
error, replace the toner cartridges.
To install the indicated cartridges. See “Toner Cartridge” on page 
161.