1 - 87Chapter 1 TroubleshootingFIP-1.P4 Vertical blank lines (White stripes in paper transport direction)Trouble substanceThere are some extremely faint or completely non-printed parts. Those non-printed parts cover a wide area vertically, along the paper feeding direction.ESS and possible causative parts- EP CARTRIDGE- BTR ASSY (PL8.1.21)- 150 FEEDER ASSY (PL5.1.1)- ROS ASSY (PL8.1.1)- PWBA ESS (PL12.1.13)- FUSER ASSY (PL8.1.20)- Heat Roll- Pressure Roll- 250 FEEDER ASSY (PL6.1.11)- 550 FEEDER ASSY (PL7.1.10)Before commencing troubleshooting, check the paper transfer course. Make sure there is no foreignarticles on the transfer course, such as staples, paper clips, scraps of paper and so on.Step Check Yes No1Checking the paper conditionHave new, dry and recommended paper on.Re-print the problem image.Does the problem still occur?Go to step 2. End of work2Checking the paper transfer courseCheck if there are any stains or obstacles on the papertransfer course between the paper feeding entrance andthe exit.Are there any obstacles on the paper transfer course?Go to step 3.Remove theobstacles orstains from thepaper transfercourse.3Checking the laser beam courseMake sure there is no obstacle between ROS ASSY andDrum.Are there any obstacles on the laser beam course?Check if any stains on ROS ASSY window.Go to step 4.Remove all theobstacles fromthe laser beamcourse and/orclean ROS ASSYwindow.4Checking EP CARTRIDGEInstall a new EP CARTRIDGE.Re-print the problem image.Does the problem still occur?Go to step 5. End of work5Checking BTR ASSY (PL8.1.21)Remove BTR ASSY. (RRP8.10)Check if any stains and/or wear on BTR ASSY.Are there any stains and/or wear on BTR?Go to step 6. Replace BTRASSY. (RRP8.10)
