Ricoh D260 Pro C5200S
Troubleshooting. Image Quality 002. Horizontal White Streaks in Small Solid Black Areas
Symptom
Horizontal white streaks may appear in small solid black areas (smaller than 3cm x 3cm).
Cause
Electrical charge of the Bk toner is lower compared to other toners because the Bk station is the most downstream, and the transfer bias is set higher in FC mode. This prevents black toner from maintaining the optimum charge level, which may result in poor toner transfer.
Action
- Print black in FC mode.
PS driver and PCL driver
• Select “Print Quality” from Detailed Settings.
• Select “User Setting” as Settings for Images.
• Select “CMY+K” or “Black by K (Black) – Text Only” for PS driver, and “CMY+K” for PCL driver
as Gray Reproduction.
Fiery driver
• Select “Job Properties” of the affected image.
• Select “Expert setting” from “Color” tab.
• Select “Gray/Black Processing” Tab.
• Specify “Normal” for Black text and graphics in order to print in CMYK mode. - Increase the image transfer current. (+5 to 10 A from the default) [#016: Image transfer current: FC: K]. First increase the value by +5 A. Check the results and increase or decrease the value by 1 A as necessary. Do not increase by more than +10 µA from the default.
Risks:
Image density may decrease in Bk solid images that have a high coverage ratio. (Density at the
sides become low.) Ghosting of Bk halftone images - Adjust the paper transfer current. (-5 A to -15 A from the default)
To ease the symptom, decrease the paper transfer current in [#026 & #027: Paper transfer current:
FC: Side 1, 2].
Decrease -5 µA at a time as you check the results.
Do not decrease by more than -15 µA from the default.
Risks:
Low image density
Toner scattering around solid images - Increase the maximum image density.
To ease the symptom, increase the maximum image density of Bk in [#011: Maximum Image
Density:K] by adjusting the notch to the [+].
Side effect:
Low toner yield
MP C6503/C8003, Pro C5200S/C5210S
SP No. | SP Name |
---|---|
SP2-451-001 | ITB K:Standard:FC |
SP2-451-002 | ITB K:Standard:BW |
Pro C5200S/C5210S only
No. | IMSS setting |
---|---|
015 | Image Transfer Current: BW |
016 | Image Transfer Current: FC: K |
Note:
• Transfer capability and image density may become worse.
• Residual image may appear in black halftone areas.