HP 4600dn Service Manual - Page 182

CAUTION Laser/scanner units To remove the laser/scanner cover plate 1 Remove the rear cover. See page 144. 2 Remove the top cover. See page 145. 3 Remove the rear top cover. See page 146. 4 Remove the left cover. See page 148. 5 Remove the DC controller shield. See page 155. 6 Remove the right cover. See page 150. 7 On the DC controller PCB, disconnect the four connectors shown in callout 1. 8 On the DC controller PCB, release the brown tab covering the formatter ribbon cable, and disconnect the cable (callout 2). When removing the formatter ribbon cable, be careful not to tear it. Use a flat-blade screwdriver to release the brown tab over the connection. Do not pull on the ribbon cable without releasing this tab. 9 Remove the formatter case. See page 178. 2 1 Figure 6-49 Disconnecting the laser/scanner connectors and formatter ribbon cable 10 At the rear of the printer, place the cardboard spacer (included with the laser/scanner assembly) underneath the V mark on the bottom of the printer frame (callout 3 on the next page). CAUTION Always place the spacer under the printer frame. This spacer is important to support the printer and keep it from flexing when the plate that covers the laser/scanners is removed. If the printer frame flexes, the laser beams may become skewed, resulting in print quality problems. 11 Remove the four screws shown in callout 4. 12 Using needle-nose pliers, pull down on the right side of the wire clip, then release the left side of the clip from the bracket. Repeat this procedure for each of the four clips. 13 Remove the plate that covers the laser/scanner units. 180 Internal components (rear) C9660-90901