Canon imageRUNNER ADVANCE C3330 Series, Руководство по устранению неисправностей, Страница: 51 / 200

Copier Color | iR-ADV C3330/C3325/C3320 Series |
Faint small text/thin line in black during printing
[Symptom]
When a printout is made, the symptom, Faint small text and thin line in black, may occur.
[Cause]
This machine reliably reproduces drawing data of small text and thin line.
When the fonts for small text and thin line are printed, they tend to appear thinner/fainter than those printed from other models.
This results in the symptom.
[Service work]
[Caution] Changing the setting value in the following procedure somewhat increases the black toner consumption.
1) In Service Mode (Level2) > Mode List > COPIER > Option > IMG-MCON > PSCL-TBL, change the setting value to "1." Then
turn OFF/ON the main power switch.
The range of setting is from "0" to "1" ("0" by default).
By changing the setting value, the parameters of auto gradation adjustment are adjusted so that only the density of Black is
increased.
2) Select Settings/Registration > Adjustment/Maintenance > Adjust Image Quality > Auto Adjust Gradation [1] , and then press
the "Full Adjust" button [2] .
3) Select a paper source of the paper type that needs to undergo the correction, and press "OK". According to the message
appearing on the screen, output a test print and scan it, and perform Full Adjust.
[Reference] The following shows recommended paper for Japan, USA, and Europe.
-JPN : CS680/68g [Nippon Paper]
-USA : Canon Multipurpose 20lb/75g [Domtar]
-EUR : Oce Red Label 80/80g [Mondi Business Paper]
4) Output the image having shown the symptom, and check that the symptom does not occur. If the symptom no longer occurs,
the work is completed.
If the improvement of the symptom is not enough, go to step 5).
5) Go to Service mode > Mode List > COPIER > Adjust > DENS > and change the setting value of "DMAX-K" to "+128".
The range of setting is from "-128" to "+128" ("0" by default).
Changing the setting value increases the black density target for Laser Power Correction (D-max) Control.
[Caution] Changing the setting value may reduce the fixing performance.
6) Perform Auto Adjust Gradation in steps 2) to 3).
7) Output the image having shown the symptom, and check that the symptom does not occur.
If the symptom does not improve in black solid text and thin line, check for other factors.
If the symptom does not improve in text in Middle density range for Black, go to step 8).
8) Select Settings/Registration > Function Settings > Printer > Printer Settings > Custom Settings > Print Quality > Density (Fine
Adjust) > Black [1].
46