Figure 2-22 Tray 3 Paper Surface Sensor - HP LASERJET ENTERPRISE M725dn Troubleshooting Manual

Tray 3 paper surface sensor (SR11)
1. Remove Tray 2 and Tray 3, and then push the sensor at the back of the tray cavity.
Figure 2-22
2. Check the control-panel display for sensor response.
3. If there is no response, replace the lifter drive assembly.
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Tray 3 paper surface sensor
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