HP LaserJet 1100 Service Manual - Page 58

Removal and replacement strategy This chapter documents removal and replacement of field replaceable units (FRUs) only. Replacement is generally the reverse of removal. Occasionally, notes are included to provide direction for difficult or critical replacement procedures. WARNING! Unplug the power cord from the power outlet before attempting to service the HP LaserJet 1100 Printer. If this warning is not followed, severe injury can result. Certain functional checks must be performed during troubleshooting with power supplied to the product. However, the power supply should be disconnected during removal. Never operate or service the HP LaserJet 1100 Printer with the protective cover removed from the laser/scanner assembly. The reflected beam, although invisible, can damage your eyes. The sheet metal edges of the HP LaserJet 1100 Printer can be sharp. Use caution when working on the HP LaserJet 1100 Printer. CAUTION: The HP LaserJet 1100 Printer contains parts that are electrostatic discharge (ESD) sensitive. Always perform servicing at an ESD-protected workstation. NOTE: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, then carefully turn clockwise to tighten. Do not overtighten. If a self-tapping screwhole becomes stripped, repair the screw-hole or replace the affected assembly. Always remove the Toner Cartridge before removing or replacing parts. 62 Removal and Replacement C4224-90962