Oki MC573dn User Manual page 191

While removing the fuser unit, be careful not to hit it to the LED head.
10
Turn the lock levers (g) on the both sides of the belt unit toward you and
remove the belt unit by holding the lock levers.
11
Remove the jammed paper slowly by pulling the edge of paper.
12
Hold the lock levers of belt unit and place the belt unit into the machine.
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9. Troubleshooting