Oki OKIPAGE 8z Service Manual page 108

Yes - Remove the jammed paper.
No - Is paper sensor E (manual feed/paper) operating normally?
No - Replace paper sensor E (manual feed or paper).
Yes - Replace the high-voltage power supply board.
No - Does a paper input jam occur during paper loading?
Yes - Is the paper already fed to paper sensor E (manual feed)?
Yes - Is paper sensor E (manual feed) operating normally?
No - Replace paper sensor E (manual feed).
Yes - Check the gear block or replace high-voltage power supply board.
No - Is the paper already fed to paper sensor E (paper)?
Yes - Is paper sensor E (paper) operating normally?
No - Replace paper sensor E (paper).
Yes - Replace high-voltage power supply board.
No - Replace the stepping roller or friction pad.
No - Is the hopping roller rotating?
Yes - Check the coil resistance of magnet H. Is the resistance normal (about 120 W)?
No - Replace magnet H.
Yes - Is +26 V supplied between CN8 Pin 1 and CN8 Pin 2 of the main control board?
No - Replace the main control board.
No - Check the gear block or replace the hopping shaft assy.
No - Are the CN7 connectors of the pulse motor (main) and main control board connected?
No - Connect the CN7 connectors correctly.
Yes - Measure the resistance of the pulse motor (main). Is the resistance normal (about 3.8 W)?
No - Replace the pulse motor (main).
Yes - Replace the main control board.
[JAM error]
2-2 Paper feed jam
Does a paper feed jam occur when the power supply is turned on?
Yes - Is the jammed paper on paper sensor E (paper/exit)?
Yes - Remove the jammed paper.
No - Is paper sensor E (exit/paper) operating normally?
No - Replace paper sensor E (exit or paper).
Yes - Replace the high-voltage power supply board.
No - Has the paper arrived at paper sensor E (paper)?
No - Is the feed roller rotating?
No - Check the gear block.
Yes - Is the EP image drum unit set correctly?
No - Set the EP image drum unit correctly.
Yes - Check the gear block.
Yes - Has the paper arrived at the paper sensor (exit)?
Yes - Is the paper sensor (exit) operating normally?
No - Replace the paper sensor (exit).