Symptom
  1. When using paper with a paper weight of 100.9 g/m2 (MP C6503/C8003: Plain Paper 2, Pro C5200S/C5210S: Paper Weight 3) or lighter: White spots may appear on the 2nd page of duplex printing when using paper with a rough surface and high electrical resistance in an LL environment.
  2. When using paper with a paper weight of 101.0 g/m2 (MP C6503/C8003: Middle Thick, Pro C5200S/C5210S: Paper Weight 4) or heavier: White spots may appear on paper with a rough surface and high electrical resistance. (See the example image below)
Cause
  1. The electrical resistance increases when the paper goes through the fusing unit and the moisture of the paper evaporates.
  2. Due to high electrical resistance characteristics of the paper.
Action

Lower the transfer current by changing the following SP

Only change it for the paper type and thickness that the user needs to use.

MP C6503/C8003, Pro C5200S/C5210S

SP No.

SP Name

SP2-641-001 to 099

PTR Bias:BW

SP2-642-001 to 099

PTR Bias:BW

SP2-651-001 to 099

PTR Bias:FC

SP2-652-001 to 099

PTR Bias:FC

Pro C5200S/C5210S only

No.

IMSS setting

020

Paper Transfer Current: BW: Side 1

026

Paper Transfer Current: FC: Side 1

021

Paper Transfer Current: BW: Side 2

027

Paper Transfer Current: FC: Side 2

  • If the transfer current is too low, the image may not be solid enough.