White Stripes Appear On The Print - Oki IP-6620 User Manual

White stripes appear on the print.

Basic image
Cause
[Symptom A]
The media advance adjustment value is
not proper.
[Symptom A]
The media advance accuracy is poor, or
is not stable.
[Symptom B]
Print head nozzles are clogged.
252
Troubleshooting
[Symptom A]
[Cause]
The media advance adjustment
value is not proper.
[Check]
White stripes appear in all
colors when a color stripe
bar is printed.
Adjust the media advance adjustment value.
* The media advance adjustment value differs depending on the winding mode, loose or
tension.
- Be sure to adjust the media advance adjustment value again after changing the winding
mode (loose or tension).
- Be sure to adjust the media advance adjustment value again after changing the pressure
roller lever position.
- Be sure to adjust the media advance adjustment value again after changing the suction
fan setting of the media preset.
(1) Check that the media was installed properly in the conditions below.
- The installed media is installed parallel to the printer.
- The operation panel shows the media type correctly.
- The media winding mode is optimal for the installed media.
- If the media is curled or wrinkled, see the description on the problem, The media is
curled or wrinkled.
(2) Adjust the pressure on the media with the pressure roller lever. *
(3) Change the print mode to be slower. *
(4) Check that the media is correctly stretched between the paper roll and the
pressure roller.
* If the media is loose when performing the media advance adjustment, the value will be
incorrect.
(1) Perform a nozzle print, and set nozzle map for the clogged nozzles. (
105)
(2) Check for obstructions such as media lint or ink clot in the nozzle scanning path
including the platen surface, and remove them.
(3) If the media is curled or wrinkled, solve the problem by referring to the description
on the problem, The media is curled or wrinkled.
(4) Perform the daily maintenance.
* Do not forget to clean the head guard and media edge guards.
* Be sure to perform the print head cleaning.
(5) Clean the print heads surfaces with print sheet mount cleaning (
- Printing with a color stripe bar is effective to prevent missing dots. (
[Symptom B]
[Cause]
The print head nozzles are
clogged.
[Check]
White stripes appear in some
colors when a color stripe bar
is printed.
Solution
1 2
*
[Symptom C]
[Cause]
The ink does not match well with
the media.
1
page
page 127).
page 174)