Konica Minolta bizhub 20P bizhub 20P User Guide - Page 135

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Troubleshooting Examples of poor print quality Recommendation „ Make sure that you use paper that meets our specifications. See About paper on page 6. „ Choose Thick Paper mode in the printer driver, or use thinner paper than what you are now using. „ Check the printer's environment. Conditions such as high humidity can cause hollow print. See Positioning the printer on page 5. Hollow print „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 97. „ Clean the primary corona wire inside the drum unit by sliding the blue tab. Be sure to return the blue tab to the home position (a). See Cleaning the corona wire on page 108. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 97. „ The fuser unit may be contaminated. Call KONICA MINOLTA Customer Service. 7 All black White lines across the page „ Make sure that you use paper that meets our specifications. A rough surfaced paper or thick print media can cause problems. „ Make sure that you choose the proper media type in the printer driver. „ The problem may disappear by itself. Print multiple pages to clear this problem, especially if the printer has not been used for a long time. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 97. „ Clean the inside of the printer and the primary corona wire in the drum unit. See Cleaning the inside of the printer on page 103 and Cleaning the corona wires on page 108. „ The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 97. Lines across the page „ Check the printer's environment. Conditions such as high humidity and high temperatures may cause this print quality problem. (See Positioning the printer on page 5.) „ If the problem is not solved after printing a few pages, put in a new drum unit. (See Replacing the drum unit on page 97.) White lines, bands or ribbing across the page 125

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Troubleshooting
125
7
Hollow print
Make sure that you use paper that meets our specifications. See
About paper
on
page 6.
Choose
Thick Paper
mode in the printer driver, or use thinner paper than what
you are now using.
Check the printer’s environment. Conditions such as high humidity can cause
hollow print. See
Positioning the printer
on page 5.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 97.
All black
Clean the primary corona wire inside the drum unit by sliding the blue tab. Be sure
to return the blue tab to the home position (
a
). See
Cleaning the corona wire
on
page 108.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 97.
The fuser unit may be contaminated. Call KONICA MINOLTA Customer Service.
White lines across the page
Make sure that you use paper that meets our specifications. A rough surfaced
paper or thick print media can cause problems.
Make sure that you choose the proper media type in the printer driver.
The problem may disappear by itself. Print multiple pages to clear this problem,
especially if the printer has not been used for a long time.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 97.
Lines across the page
Clean the inside of the printer and the primary corona wire in the drum unit. See
Cleaning the inside of the printer
on page 103 and
Cleaning the corona wires
on
page 108.
The drum unit may be damaged. Put in a new drum unit. See
Replacing the drum
unit
on page 97.
White lines, bands or ribbing
across the page
Check the printer's environment. Conditions such as high humidity and high
temperatures may cause this print quality problem. (See
Positioning the printer
on page 5.)
If the problem is not solved after printing a few pages, put in a new drum unit.
(See
Replacing the drum unit
on page 97.)
Examples of poor print
quality
Recommendation