Removal and replacement strategy This chapter documents the removal and replacement of field- replaceable units (FRUs) only. Replacement is generally the reverse of removal. Occasionally, notes are included to provide directions for difficult or critical replacement procedures. WARNING! Remove the power cord before attempting to service the product. If this warning is not followed, severe injury can result as well as damage to the device. Certain functional checks during troubleshooting must be performed with power supplied to the product. However, the power supply should be disconnected during removal of any parts.
Never operate or service the product 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 product can be sharp. Use caution when working on the product. CAUTION Some parts are electrostatic discharge (ESD)-sensitive. Always perform service work at an ESD-protected workstation. To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, then carefully turn it clockwise to tighten. Do not overtighten. If a self-tapping screw-hole becomes stripped, repair the screw-hole or replace the affected assembly.
Always remove the print cartridge before removing or replacing parts. See “Print cartridge” on page 110. Required tools #2 Phillips-head screwdriver with magnetic tip Small flatblade screwdriver Needle-nose pliers ESD mat Penlight #8 torx screwdriver CAUTION Do not use a PoziDriv screwdriver or any motorized screwdriver. These can damage screws or screw threads on the product. EN Removal and replacement strategy 109