User Guide

Reinstallation tip
Dc controller reinstallation for LJ 4250/4350 only
1 After installing a new dc controller, turn the printer on and wait for five minutes after the printer
reaches the Ready state.
NOTE Five minutes is required to allow for NVRAM settings to be written.
2 Turn the printer off.
3 Turn the printer on again, and then wait five minutes after the printer reaches the Ready state.
4 Print a configuration page to verify against original settings.
Installing a new formatter and a new dc controller (LJ 4250/4350
only)
CAUTION If you are installing a new formatter and a new dc controller on an HP LaserJet
4250 or 4350 Series printer, follow the instructions in this section.
Failure to follow these instructions can result in a printer-configuration downgrade. For
example, an HP LaserJet 4350 printer could perform as an HP LaserJet 4250.
1 Turn the printer off.
2 Remove the formatter (see
Formatter assembly ) and replace it with the new formatter.
3 Turn the printer on and then wait for five minutes after the printer reaches the Ready state.
NOTE Five minutes is required to allow for NVRAM settings to be written. The same five-
minute wait is required several times during this procedure.
4 Turn the printer off.
5 Turn the printer on again, and then wait five minutes after the printer reaches the Ready state.
6 Turn the printer off.
7 Remove the dc controller (see
Dc controller PCA) and replace it with the new dc controller.
8 Turn the printer on and wait for five minutes after the printer reaches the Ready state.
9 Turn the printer off.
10 Turn the printer on again, and then wait five minutes after the printer reaches the Ready state.
11 Print a configuration page to verify against original settings.
12 Verify the printer series (4250/4350).
Main assemblies 235