Oki MPS420b User Manual page 61

4. Remove any jammed sheets from the paper path.
5. Re-install the image drum complete with toner cartridge, ensuring that the pegs
(1 & 2) correctly locate into the slots on each side of the printer (3).
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6. Lower the top cover but do not press down to latch it closed yet. This will protect
the drum from excessive exposure to room lighting, while you check the
remaining area for jammed sheets.
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Troubleshooting > 61
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