HP laserjet m712 문제 해결 가이드
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Tray 4 Feed sensor (SR1)
1.
Open the lower right door.
2.
Use a small flatblade screwdriver to activate the sensor.
Figure 2-22
Tray 4 feed sensor
3.
Check the control-panel display for sensor response.
4.
If there is no response, replace the optional Tray 4 assembly.
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Chapter 2 Solve problems
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