HP LaserJet 4250 Service Manual - Page 226

3 Slide the formatter assembly toward the rear of the printer to remove it. Figure 6-38 Formatter assembly (2 of 2) CAUTION Correct reinstallation of the formatter is critical to correct operation of the printer. If you are installing a new formatter, follow instructions in the reinstallation tips. If you are installing a new formatter and a new dc controller in an HP LaserJet 4250 or 4350 Series printer, see the special section that follows this formatter section-Installing a new formatter and a new dc controller (LJ 4250/4350 only). 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. Reinstallation notes, formatter If you install a replacement formatter, complete the following steps: 1 Perform an NVRAM initialization (see To initialize NVRAM). 2 Use the control-panel display to open the service menu and specify the total page count, the maintenance count, the service ID, the cold reset paper size, and the serial number (see Service menu (service PIN codes)). 3 Reset the printer display language to the customer's choice (see Setting the control-panel display language). 212 6 Removing and replacing parts