HP 4550 Service Manual - Page 165

Note CAUTION Drum drawer (top drawer) assembly To remove the drum drawer (top drawer) Turn the printer off, wait five seconds, and then unplug the printer. 1 Open the drum drawer (top drawer) until it stops and remove the imaging drum, protecting it from light. Exposure to light for more than 15 seconds can seriously damage the imaging drum. 2 Remove the top cover. 3 Remove the left side cover. 4 Remove the RFI shield. 5 For printer serial numbers xxG or lower, remove the top cover switch assembly. 6 Disconnect connectors J1004 and J1010 on the DC controller (see callouts 2 and 3 in Figure 7-37 on page 317) and remove the cables from the cable stays. 7 Disconnect the drum drawer (top drawer) switch (see callout 1, Figure 6-20). 1 Figure 6-20 Drum drawer (top drawer) switch 8 Free the main cable from all cable stays at the top and left side of the printer; push the cables back toward the rear of the printer. 9 Remove the two screws from the black plastic housing shown in callout 1, Figure 6-21. 10 Lift the black plastic housing and slide it forward onto the front drawer. C7085-90921 Chapter 6 Removal and replacement 163