QMS 1800486-001C 用户手册

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If the toner smudges are on only the front of the page:

Remove the toner cartridges and gently rock them five or six
times to redistribute the toner. Then, reinstall the cartridges.

One or more toner cartridges may be defective. Check the
toner cartridges, and install new ones, if necessary.

If toner smudges are on the back of the page:

Replace the cleaning roller.

If that doesn’t work, replace the transfer roller.

If that doesn’t work, replace the fusing unit.

If toner smudges are on the front

and back of the page:

Open the printer once and close it again to clean the image
transfer roller.

If the image of the previous page comes out lightly,

Clean the cleaning roller and reinstall it.

Remove the toner cartridges and gently rock them five
or six times to redistribute the toner. Then, reinstall the
cartridges.

Install new toner cartridges.

Reinstall the OPC belt cartridge. If necessary, replace the
OPC belt cartridge.