вот выдержка из сервис-мануала непосредственно по 3005
NVRAM initialization
CAUTION Initializing the NVRAM resets the serial number, the event log, the page counts, and
the EIO card (initializing the NVRAM resets SERVICE menu values to factory defaults). Use the
service menu to restore the serial number and page counts. Also reconfigure any computers that
print to this device so that the computers can recognize the device. Initialize the NVRAM only
when absolutely necessary. In most situations, use a cold reset rather than a NVRAM initialization
to reset device settings (this will retain the values in the SERVICE menu).
NOTE Before performing a NVRAM initialization, print a menu map and a configuration page
(see Use information pages on page 38). Use the information on the configuration page to reset
any customer-set device configuration values that the NVRAM initialization procedure changes.
Take special note of thetotal page count, maintenance count, and the serial number.
1. Remove any installed accessories.
2. Turn the device off.
3. Turn the device on. When the memory count begins, press and hold the "down" button. Continue
holding down the "down" button until all three device control-panel lights flash once and then remain
on. This might take up to 10 seconds.
4. Press the "UP" button.
5. Press the Menu button. The display should show SKIP DISK LOAD.
6. Press the "UP" button until NVRAM INIT is highlighted.
7. Press "ok". The device initializes NVRAM and then continues the power-on sequence