Specifications
254 Using the Control Panel
Install LC3
The paper trays of the optional 1100-sheet paper cassette unit are 
not installed, or not installed properly. Install the paper trays 
correctly to clear this error.
Install Photoconductr
There is no photoconductor unit installed or the photoconductor 
unit is not installed properly. Turn off the printer and install the 
photoconductor unit if it is not installed.
If a photoconductor unit is already installed, confirm cover D is 
closed. Otherwise, turn off the printer, open cover A, and then 
open cover D. Remove the photoconductor unit, then reinstall it 
properly. Close covers D and A. The error clears automatically if 
the photoconductor unit is properly installed. 
Install Transfer Unit
There is no transfer unit installed or the transfer unit is not 
installed properly. Turn off the printer, then install the transfer 
unit if it is not installed. 
If a transfer unit is already installed, turn off the printer, open 
cover A, then remove the transfer unit. Reinstall the unit properly, 
then close cover A. The error clears automatically if the transfer 
unit is properly installed. 
Install uuuu TnrCart
The indicated toner cartridges are not installed in the printer. (The 
letters C, M, Y, or K appear in place of uuuu and indicate the colors 
Cyan, Magenta, Yellow, and Black respectively.)
Install the indicated cartridges. See "Toner Cartridge" on page 312.
Invalid AUX I/F Card
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