Oki IP-7900-21, Advanced Operation Manual

Page: 62 / 109

IP-7900-20/21/7700-20/21 Advanced Operation Guide
62
The print is smeared.
[Cause]
The ink is improperly sprayed
from the print head.
[Cause]
The ink is drooling.
[Cause]
The print head is scratched by
media.
Basic image [Symptom A] [Symptom B] [Symptom C]
Cause Solution
[Symptom A]
l
The ink is improperly sprayed
from the print head.
(1) Use the Printer within the operating temperature/humidity range.
(2) Check the "#PH HEIGHT VAL" value. If the value is more than 0, set the value to 0.
*3
(3) Perform the daily maintenance.
* Be sure to clean the head guard, edge guards, carriage’s bottom face, and the right
and left sides of the print head top.
(4) Perform print head cleaning (STRONG).
(5) Change the print mode to be slower.
*1*2
(6) Perform the CHARGE CAP CL.
(7) With the print sheet mount cleaning (
Basic Operation Guide page 96
),
clean the print head surface.
(8) By decreasing the "#PH HEIGHT VAL" value, lower the print head height.
*3
* Do not decrease the value excessively, as the lowered print head may cause media
jams more frequently.
[Symptom B]
l
The ink is drooling.
(1) Use the Printer within the operating temperature/humidity range.
(2) Check the obstructions such as media lint or ink clot in the nozzle surface path
including the platen surface, and remove them.
(3) If the ink is accumulated or the net tears on the spittoon case surface, replace
them.
(4) If the media is curled or wrinkled, solve the problem by referring to the
description on the problem, “The media is curled or wrinkled.”
(5) Perform the daily maintenance.
* Do not forget to clean the head guard and edge guards.
* Be sure to perform print head cleaning.
(6) Perform the CHARGE CAP CL.
(7) With the print sheet mount cleaning (
Basic Operation Guide page 96
),
clean the print head surface.
(8) Note that some media are staticky, on which by static electricity the ink droplets
on the nozzle surface may cause the ink drooling. Use the proven media.
(9) With some banner media, feathery media edge scratches the print head, which
may cause the ink drooling.