Troubleshooting Image Quality Problems; Table 7-2 Image Quality Problem Troubleshooting Item List - Oki LP-1040 Maintenance Manual

7.3

Troubleshooting Image Quality Problems

A list of image quality problem troubleshooting items is given below. Afterwards,
troubleshooting instructions for each item are given.
Item
(1) Gray cast
(2) Print density irregularities
(3) Density between prints
variation
(4) Too low density
(5) White loss (partial)
(6) Poor Image reproduction
(7) White loss (horizontal belts)
(8) White loss (vertical belts)
(9) Black lines (horizontal)
(10) Black lines (vertical)
*Image not printed
(11) Black lines (vertical)
*Image printed
(12) Black belts (vertical)
(13) Black dots
(14) Toner fusing problem
(15) Positioning problem
(16) Tilted image
(17) Solid white print
(18) Repeat print
(19) Skipping
(20) Smearing
(21) Solid black print
(22) Ink spatter
Chapter 7 Printer Image Quality Problems Troubleshooting

Table 7-2 Image Quality Problem Troubleshooting Item List

The white parts on the printout are globally slightly tainted.
Density irregularity or line width differnces appear in a
printout.
Density irregularities appear between printouts of the same
pattern made successively.
The printout density is low or the 3-dot line is too thin.
Parts in the printout are missing.
The original and the printout differ.
Characters or forms not present in the original are printed.
Some bits are missing.
Vertical 8-mm bands are missing.
An image already printed overlaps printouts made afterward.
Belts of missing print appear horizontally.
Belts of missing print appear vertically.
Several black lines not present in the original image are
printed horizontally. The image is printed.
Several black lines not present in the original image are
printed vertically or black stripes appear all over the printout.
The image is not printed.
Several black lines not present in the original image are
printed vertically. The image is printed.
Black belts not present in the original image are printed
vertically.
Black dots are printed.
The toner on some parts of the printout can easily be rubbed
off by hand.
The print position is incorrect either in the up/down or right/left
direction.
The image is printed with a diagonal tilt due to skewed paper.
Nothing is printed.
The same image is printed at intervals.
An area is not printed in the horizontal direction.
Horizontal lines appear duplicated or smeared.
All the printout is black.
The toner of horizontal lines spatters backward.
Description
7-7