Ricoh MP C6502SP Field Service Manual page 1435

Image Quality 005: Unevenness
Overview
The density of images and text is uneven.
Item
Density difference between left and right
Vertical bands of density unevenness on back
sides of duplex prints made on coated paper
in low-temperature, low-humidity environment
Uneven density in the area 85mm from the
trailing edge
Uneven density in the area 85mm from the
trailing edge in low-temperature, low-humidity
environment
Grainy image
Density unevenness and dust when using AC
transfer (CH-C1 Pro only)
Uneven glossiness when feeding large size
paper after small size paper
Unevenness in indefinite shape on sides of
paper
Troubleshooting for Density Difference between Left and Right
Overview
If uneven density occurs, follow this troubleshooting procedure.
Description
When making duplex prints on coated paper in low-
temperature, low-humidity environment (10°C,
15%), vertical bands of density unevenness appear
on halftone images only on the back sides.
Uneven density of halftone image may appear in
area 85mm from the trailing edge, which
correspond to the point where the paper leave the
registration rollers.
Density of halftone image may be higher or lower in
area 85mm from the trailing edge.
The image density is not uniform across image areas
when printing onto paper that is not smooth under
High-temperature, High-humidity (27°C, 80%).
With certain types of paper, the concave portions of
the paper may be white or too dark, or there may
be thin lines of dust.
The glossiness may be uneven at the sides of the
paper (outside the width of the small size paper).
Unevenness in indefinite shape may appear on both
sides of paper.
Image Quality
1433