Ricoh D257 MPC6503SP
Troubleshooting. Image Quality 001. White Spots in Low-Temperature, Low-Humidity Environments
Symptom
- 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.
- 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.
Cause
- The electrical resistance increases when the paper goes through the fusing unit and the moisture of the paper evaporates.
- 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 |
Note:
• If the transfer current is too low, the image may not be solid enough.