HP LaserJet 4 Service Manual - Page 364

Removal and Replacement This section describes the complete disassembly of the Duplexer. Tasks that must be performed before beginning the procedure are listed first. Remove the assemblies in the order listed to prevent damage. The assembly procedure is the reverse of the removal procedure, except where specific instructions are provided. In the removal and replacement procedures that follow, the number inside the parentheses, such as (4), refers to the number of screws to remove. Warning Power OFF the printer and disconnect the power cord from the outlet and the printer before servicing the Duplexer. Some sheet metal edges are sharp. Be careful when working in these areas to avoid being cut. Caution The Duplexer contains parts that are sensitive to Electro-Static Discharge (ESD). Always observe proper ESD procedures when servicing the Duplexer. This symbol appears when the parts being serviced are especially susceptible to ESD damage. Required Tools #2 Magnetized Phillips Screwdriver Small Flat-head Screwdriver (6-inch shaft) Needle-nose Pliers Caution Do not use a Pozidriv screwdriver. Damage to the screw heads will result. A -8 Duplexer