Image Faults; Poor Image Which Is Round Weak Density / Poor Image Which Is Weak Density Band, They Occur Due To Using Left Paper In A Low-Humidity Environment - Canon imageRUNNER ADVANCEC3530 Series Troubleshooting Manual

Image Faults

Copier Color | iR-ADV C3530/C3525/C3520 Series |
Poor image which is round weak density / poor image which is
weak density band, they occur due to using left paper in a low-
humidity environment.
[Symptom]
Poor image which is round weak density [a] or poor image which is weak density band [b] may occur when a high density image
is printed out with the paper which is left outside of the machine in a low-humidity environment. Only one poor image occurs at
times, some poor images occur at other times.
The arrow [c] indicates the feed direction.
[Cause]
Electric resistance of the paper is higher because the paper is dehydrated by leaving in a low-humidity environment.
Electric resistance at the timing of the passing of 2nd side of 2-sided print is higher because the moisture of the paper is lost
when the 1st side is fixed.
Electric resistance of feeding roller is higher because moisture content in the air is low under the low-humidity environment.
Transferring of a high density image needs higher secondary transfer voltage than that of a low density image.
When the total electric resistance of the paper and the roller is higher than expected at the Secondary transfer Assembly, the
above symptom occurs because of insufficient secondary transfer voltage.
Especially when the 2nd side has high density image, the symptom is easy to occur.
[Service work]
[Reference]
Improving a state of preservation of paper may be effective in resolving a trouble in some cases.
Explain to a customer that unused or remaining paper should be stored by being covered with wrapping paper in a place avoiding
direct sunlight.
Choose and perform between the below a) and b).
a) Increase the secondary transfer voltage in User mode.
a-1) Log in to the User mode with "System administration mode".
a-2) Go to Select Settings/Registration > Personal Settings ( Device Settings ) > Preferences > Paper Settings > Paper Type
Management Settings , select an appropriate paper type from among the list, press "Duplicate" button and then "OK" button.
a-3) Enter any name as the duplicated paper type and press "OK" button.
a-4) Select the paper type duplicated in the step a-3) and press "Details/Edit".
a-5) Change the setting value by pressing " Change " button of "Adj. secondary transfer voltage " .
- When the symptom occurs on the 1st side o f 1-sided print or 2-sided print, change the setting value of "Front side" to "3" and
then press "OK".
- When the symptom occurs on the 2nd side of 2-sided print, change the setting value of "Back side" to "3" and then press "OK".
The range of setting is from "-80" to "80" ("0" by default).
As the setting value is changed by 1, the secondary transfer voltage changes by 50V.
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