Oki C330 - Manual (Page 122)

122 – C330/C530 Troubleshooting
7. Align the pegs on the sides of the image drum with the slots
in the sides of the printer and place the image drum and
toner cartridges back into the printer.
8. Lower the top cover but do not press down to latch it closed
yet. This will protect the drums from excessive exposure to
room lighting while you check the remaining areas for
jammed sheets.