ALFA 20DX Has gray background, Prints all black, Has repeating marks, Faded vertical stripes

Page has gray background.

Reason: Static electricity causes toner to stick to background Solutions:

(1)Change papers to an acceptable laser bond and use a humidi- fier.

(2)Generate a Drum Cleaning page.

Reason: Image drum has been exposed to light.

Solution: Leave image drum cartridge in total darkness for several hours. If

this fails to restore it, install a new image drum cartridge.

Page prints all black.

Reason: Hardware problem

Solution: Contact your service representative.

Page has repeating marks.

Reason: Excess toner in paper path.

Solution: Generate a Drum Cleaning page.

Reason: Damaged image drum cartridge causes repetitive marks due to surface nicks and scratches.

Solution: Install new Image drum cartridge.

An oblong area of faint print appears on each page.

Reason: “Dropout” caused by using cotton bond paper in high humidity. Moisture has affected paper.

Solution: Change to a different type of paper or use a dehumidifier; check toner.

Vertical white streaking or faint areas on page.

Reason: Toner is low and does not distribute properly or the drum is worn out.

Solutions:(1) Replace toner cartridge.

(2) Check drum and replace if necessary.

Reason: LED array is dirty.

Solutions:(1) Clean LED array.

(2) Contact your service representative.

Faded vertical stripes

Reason: LED array is dirty.

Solution: Clean the LED array.

Vertical black lines

Reason: Toner is low.

Solution: Replace toner cartridge.

Reason:	Scratched image drum.
Solution:	Replace the image drum cartridge.
Reason:	Hardware problem.
Solution:	Contact service representative.

Fuzzy print

Reason: LED array is dirty.

Solution: Clean the LED array.

Distorted print

Reason: Paper path lamp assembly or fusing unit problem.

Solutions:(1) Generate Drum Cleaning page.

(2) Contact service representative.

E–58 Chapter 9: Problem Solving