Oki IP-6620 Maintenance Manual page 172

<Different bands appear on the printout right and left sides.>
[Symptom A]
Cause
A skewed media is (1) Check that the media condition is good. If the media roll is
fed. damaged or wound in the shape of a cone, replace the roll with a
good one.
(2) 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.
(3) Check that the take up-side media shows no irregular winding. If
an irregular winding is found, reinstall the media on the printer
and onto the take-up reel unit.
(4) Adjust the pressure on the media with the pressure roller lever. *1
(5) Use proven media.
(6) Check that the media holders on the supply side securely and
firmly support the media.
(7) Check that the media holders on the supply side are secured to
the shaft with the screws.
*1 Adjust the media advance adjustment value again.
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
User Solution
OKI Data Infotech Corporation CONFIDENTIAL
Service Engineer
Inspection Replacement Part
- Install the last firmware - Firmware version
version. - PINCH ROLLER,
- Check that the pinch roller MW
is not damaged. - PRINT HAED
- Check that the pinch roller
- CAP，MW
spring is not missing.
- WIPING UNIT,MW
- Install the last firmware
version.
- Check that the nozzles
eject ink correctly.
- Check the carriage
height.
- Check the cap position.
- Check that ink is sucked
when performing the FILL
CAP or PH.RECOVERY
operation.
- Check the wiping unit
operation.
- Check the wiping position.
Reference
Assumed to Check/
Replace
Parts
5-13