2. Push the lever to activate the sensor arms.
Figure 7-26 Test the optional Tray 3 stack-surface sensor
3. If there is no response, replace the optional Tray 3.
S, T, and U optional Tray 3 media-size sensors
1. Push any of the three buttons to see if the control panel changes for sensors S, T or U.
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S: top button on size switch
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T: middle button on size switch
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U: bottom button on size switch
Figure 7-27 Test the optional Tray 3 media-size sensors
2. If any of the tests fail, replace the 500-sheet feeder
ENWW Tools for troubleshooting 339
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