Samsung MultiXpress M537x series Service Manual page 320

4. Troubleshooting
v) Remove the Cover-Open Assy. Remove 6 screws. And remove the bottom cover.
vi) Check if the sensor and actuator are assembled correctly.
c) When lifting the pick up assy, check that 2 rollers contacts normally.
4) Check if there are any obstacles or contamination on the paper path. Remove it.
5) Close the DSDF cover.
6) Open the DSDF unit. Check if the reflection film is contaminated. Clean it.
7) Close the DSDF unit.
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