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1 Reinstall imaging unit. 2 Reinstall toner cartridge. 3 M3, M4 operation check (At this time, IU must be non-installation.). 4 Change imaging unit. 5 Change PRCB
If you do not use the original toner. May cause problems.
Make sure you only copy red in order for the red to be normal.
When the machine displays the code, you open and close the front bezel and retry until the code is not displayed.
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