HP LaserJet M9040/M9050 Service Manual - Page 238

ADF width detection sensor assembly NOTE: The ADF width detection assembly includes three gears that are aligned with the ADF width guides. Take care to hold the gear assembly in place while replacing the ADF width detection sensor assembly. This will prevent the need to realign the gears during reinstallation. 1. Remove the white board cover. See White board cover on page 162. 2. Hold the black plastic assembly in place while removing the two screws on the metal plate (callout 1). Figure 6-115 Remove the ADF width detection sensor assembly 1 2 3 3. Continue to hold the plastic assembly in place while removing the metal plate. 4. Continue to hold the plastic assembly in place while replacing the two screws without the metal plate. 5. Remove the two screws (callout 2) that mount the plastic assembly. 6. Remove one connector (callout 3). 7. Remove the ADF width detection sensor assembly. Reinstall the ADF width detection sensor assembly Be sure to replace the metal plate. Check that the gears are aligned correctly to ensure accurate width sensing during operation: with the ADF width guides extended to the maximum width, the arrow on each gear should point to the left. Be sure to run the ADF width sensor adjustment operation in the Service menu. See ADF width sensor adjustment on page 348. 220 Chapter 6 Removal and replacement ENWW