HP Color LaserJet Enterprise CP4020 Service Manual - Page 444
Laser/scanner, assembly Y/M, on Laser/scanner assembly C/Bk, Fuser, Intermediate, transfer
View all HP Color LaserJet Enterprise CP4020 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 444 highlights
Problem Sample Vertical white lines appear in a particular color. Vertical white lines appear in all colors. Horizontal lines appear on the page. A horizontal white line appears on the page. Cause Solution The laser beam window is dirty. Clean the window and remove any foreign substances. Scratches are present on the circumference of the developing cylinder or photosensitive drum. White scratch down the page could mean the scanner glass needs to be cleaned. Remove the affected print cartridge and re-install. The PGCs will clean the glass. If the problem persists, replace the affected print cartridge. The laser/scanner-unit mirror is dirty. Replace the laser/scanner assembly. See Laser/scanner assembly (Y/M) on page 186 or Laser/scanner assembly (C/Bk) on page 190. Horizontal scratches on the fuser roller. Replace the fuser. See Fuser on page 85. Scratches are present on the circumference of the ITB. White scratch down the page could mean the scanner glass needs to be cleaned. Remove the affected print cartridge and re-install. The PGCs will clean the glass. Replace the ITB. See Intermediate transfer belt (ITB) on page 92. Repetitive horizontal lines appear. Use the repetitive defects ruler to identify the dirty roller. Clean the roller. If the roller cannot be cleaned, replace the fuser. See Fuser on page 85. Horizontal scratches are Replace the print cartridge of the present on the photosensitive color that matches the defect. drum. Horizontal scratches are present on the fuser roller. Replace the fuser. See Fuser on page 85. Repetitive horizontal white lines appear. Use the repetitive defects ruler to identify the dirty roller. Clean the roller. If the roller cannot be cleaned, replace the roller. Horizontal scratches are Replace the print cartridge of the present on the photosensitive color that matches the defect. drum. Scratches are present on the Replace the ITB. See Intermediate circumference of the ITB. transfer belt (ITB) on page 92. 412 Chapter 3 Solve problems ENWW