User Guide

Removing the fan and the air duct together
1 Remove the following assemblies:
● Rear accessory cover. See
Accessory covers and the tray 2 extension door.
● Top cover. See
Top cover.
● Right-side cover. See
Right-side cover.
● Formatter cover. See
Formatter cover
2 Gently pry back the two retaining tabs (callout 1) and slip the anti-static bar (callout 2) off of
them. Rotate the anti-static bar away from the printer remove it from the printer.
3 Unplug the fan cable from location J78 on the dc controller PCA, and also unplug cables from
locations J71, J72, J79, J87, J88, J89, and J91 on the dc controller PCA.
4 Unweave all of the cables from the cable guide (callout 3).
Hint You might have to unplug connectors or release some wire-harness retainer clips
to provide enough slack in the wire-harnesses to unweave them easily from the harness
guide.
5 Remove two screws (callout 4).
4
1
3
2
Figure 6-73 Cooling fan and air duct (HP LaserJet 4250/4300/4350 series only; 1 of 2)
Motors and fans 251