1.2.5. Line like ripple on image
(1) Symptom
Unevenness in the main scan direction (CD) occurs on solid image with 2 (or more) colors.
(2) Cause
(a) High toner charge under the low humidity environment
When toner charge is increased under the low humidity environment, the leak occurs at the
1
st
transfer section.
(b) Excessive toner amount at the 1
st
transfer section
When the density is high at the solid 2 color section, the leak occurs at the 1
st
transfer
section.
(3) Solution
(a) High toner charge under the low humidity environment
Perform the 1st transfer density adjustment.
[Administrator Setting]→[System Setting]→[Expert Adjustment]→
[Process Adjustment]→ [Front & Back Density]
After adjust "Front & Back Density" and return the "Machine" display, Perform
automatically "Gamma automatic adjustment".
Note
• Increase 1st transfer current of all color(Y/M/C/K) from [Front & Back Density] by 5% for
all colors then check the result.
• If the symptom is not solved by increasing the 1
st
transfer, try to decrease the current.
• Be sure to check the image during adjustment because excessive adjustment may cause
following problems.
Too much increase: Image memory may occur in the photoconductor drum cycle (188mm
cycle).
Too much decrease: White spots may occur.
(b) Excessive toner amount at 1
st
transfer
If the above procedure does not solve the problem, decrease the max density and reduce
the toner amount to be transferred at 1
st
transfer.
[Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process
Adjustment]→[Maximum Density Adjustment]
After reset the transfer current adjusted at step (a) to 0, decrease the maximum density of
the problem color. Change every -2 steps. Be sure to confirm if the symptom is improved.
Table of contents
To Next Page
Loading...
Need help?
General
