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Top Page > Image Quality Problem: Spots > Spots > White Spots/Toner Blasting > Solution

Solution

If paper dust adheres to the paper, clean the paper dust case, guide plates, feed rollers, and transfer timing rollers.

Problem on 1st Side (Duplex Printing)

w_d194z0648.jpg

*1: Change the following adjustment items.

Print Mode

Items

B/W

029: [Paper Transfer Current: B&W: Side 1]

FC, FCS, FCS Quality

035: [Paper Transfer Current: FC: Side 1]

037: [Paper Trnsfr. Current: FC: Side 1: Qual.]

S only

043: [Paper Transfer Current: Special: Side 1]

Problem on 2nd Side (Duplex Printing)

w_d194z0648_2.jpg

*2: Change the following adjustment items.

Print Mode

Items

B/W

030: [Paper Transfer Current: B&W: Side 2]

FC, FCS, FCS Quality

036: [Paper Transfer Current: FC: Side 2]

038: [Paper Trnsfr. Current: FC: Side 2: Qual.]

S only

044: [Paper Transfer Current: Special: Side 2]

Note

  • After taking the above measures, do the color calibration adjustment of the external controller.

Note

  • There is a trade-off relationship between white spots and toner scattering. Think of the balance between two problems, and then decide the final adjustments after you have got a customer’s agreement.
    Toner scattering gets worse when paper transfer current is lowered and improves when it is raised.
    White Spots improve when paper transfer current is lowered and get worse when it is raised.