Specifications
262 Using the Control Panel
Service Req Cffff/Service Req Exxx
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/Exxx), turn off the printer, unplug the 
power cord, then contact a qualified service representative.
Sleep
The printer is currently in the power-save mode. This mode is 
canceled when the printer receives print data or the Reset button 
is pressed. In this mode, the remaining amount of the toner 
cartridge for each color is displayed in seven levels.
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 
312.
Unable Clear Error
The printer cannot clear an error message because the error status 
still remains. Try solving the problem again.
uuuu Toner Low
This message indicates that the toner cartridge for the indicated 
color is near the end of its service life. Prepare a new toner 
cartridge.
Warming Up
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