HP 4550 Service Manual - Page 81

Toner catch tray and transport assembly Thoroughly clean the toner catch tray, and clean or replace the paper transport assembly. These assemblies are easily accessed once the fusing assembly has been removed (see "Toner catch tray and paper transport assembly" on page 204). To remove the toner catch tray, pull downward on the tab and slide the tray out of the rear of the printer. To remove the transport assembly, remove the one screw (shown in Figure 6-69 on page 204) and then slide the assembly to the left. Once the assembly is free of the spline gear drive, you can easily maneuver the assembly out of the rear of the printer. Thoroughly vacuum the assembly and the cavity where the transport assembly rests. When re-installing the transport assembly, there are two tabs on the right side of the assembly that must be aligned to the printer's frame; the white drive gear splines on the assembly must be aligned with the driving gear mechanism on the printer. C7085-90921 Chapter 4 Printer maintenance 79