HP LaserJet PRO M521 Repair Manua page 76

4.
Release one tab and remove the scanner lower cover. Feed the USB and Wi-Fi module FFCs and
the control-panel FFC through the openings in the lower cover as you are removing the lower
cover.
Figure 1-93
5. Disconnect the USB cable connector from the USB PCA.
Figure 1-94
66 Chapter 1 Removal and replacement
Remove the USB cable and USB grounding cable (3 of 5)
Remove the USB cable and USB grounding cable (4 of 5)
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