Epson AcuLaser C1900 - Page 301

Troubleshooting 301
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If a photoconductor unit is already installed, open the front cover,
then remove the waste toner collector. Remove the
photoconductor unit, then reinstall it correctly. Reinstall the waste
toner collector, and close the front cover. The error clears
automatically if the photoconductor unit is installed correctly.
Install Waste T Box
The waste toner collector is not installed, or is installed
incorrectly. If there is no waste toner collector installed, install one
in the printer. If there is a waste toner collector already installed,
try removing it and reinstalling it. See “Replacing the waste toner
collector” on page 251 for instructions.
Invalid AUX I/F Card
This message means that the printer cannot communicate with
the installed optional interface card. Turn off the printer, remove
the card, then reinstall it.
Invalid HDD
Either the optional Hard Disk Drive is damaged or it cannot be
used with this printer. Turn off the printer and remove the Hard
Disk Drive.
Invalid PS3
An optional PostScript 3 ROM module that cannot be used on this
printer is installed. Turn off the printer and remove the module.
Invalid ROM A
The printer cannot read the installed optional ROM module. Turn
off the printer and remove the ROM module.
Jam XX
The location where the paper jam occurred is displayed at xxxx.
xxxx indicates the location of the error.