HP 4550 Service Manual - Page 161

Note Developing PCB To remove the developing PCB Turn the printer off, wait five seconds, and then unplug the printer. 1 Remove the top cover. 2 Remove the left side cover. 3 Remove the RFI shield. 4 Remove the plastic shield (callout 1, Figure 6-16) by releasing the two tabs shown (callout 2, Figure 6-16). If necessary, insert a flatblade screwdriver between the shield and the frame to release the tab. 5 Lift up on the shield to remove it. 1 2 Figure 6-16 Developing PCB removal and replacement (1 of 2) 6 Disconnect the connectors from the developing PCB and release the cables from the metal cable stay (callout 2, Figure 6-17 on page 160). 7 Remove the five or four screws (depending on the version of printer that is being serviced) from the developing PCB (callout 1, Figure 6-17 on page 160). 8 Lift the developing PCB up and out. Reinstallation tip When securing the developing PCB with the five or four screws, secure the metal cable stay (callout 2, Figure 6-17) at the location shown. C7085-90921 Chapter 6 Removal and replacement 159