Chapter 1515-715.3 Troubleshooting15.3.1 Image Faults15.3.1.1 Blank Image15.3.1.1.1 Blank image occurs with yellow and black only: Main controller PCB (sub PDRM-EF-A) has poor contact0018-0650Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince blank image occurred with yellow and black only, the main controller PCB (sub PDRM-EF-A) was disconnected and then re-connected for solution.CauseSince the main controller PCB (sub PDRM-EF-A) has poor contact (on J1051 side), the print image was not processed properly.Field Remedy1. Re-fit 2 main controller PCBs (sub PDRM-EF-A).2. If the symptom still occurs, interchange the upper and lower main controller PCBs (sub PDRM-EF-A).3. If the combination of colors that causes the symptom changed from yellow and black to cyan and magenta, suspect a faulty main controller PCB (subPDRM-EF-A) and replace the PCB new being in downside with a new one.4. If the symptom does not change after Step2, replace the main controller PCB (main) with a new one.FM2-9163 Main Controller PCB AssemblyFM2-9166 PDRM-EF-A PCB Assembly (S)15.3.1.2 Light Image / Weak Density15.3.1.2.1 Light image occurs in front or rear side of black image: Laser scanner assembly is faulty0018-1365Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince the image density became low in the front or rear side with regard to black alone, the laser scanner unit was replaced with a new one for solution. Inthis inspection case, the density was normal with regard to the images printed with the other monochrome colors.Field Remedy1. Re-fit J104 and J105 connectors of the DC controller PCB.2. Re-fit J15 and J21 connectors of the laser scanner assembly.3. If the symptom still occurs, replace the laser scanner assembly with a new one.4. Enter the values printed on the label accompanying the new laser scanner unit into the following service modes. After entering, affix the label to the frontcover.- Service mode > COPIER > Function > LASER > FSLUT-Y1 through FLSUT-Y8- Service mode > COPIER > Function > LASER > FSLUT-M1 through FLSUT-M8- Service mode > COPIER > Function > LASER > FSLUT-C1 through FLSUT-C8- Service mode > COPIER > Function > LASER > FSLUT-K1 through FLSUT-K8FM3-0003 Laser Scanner Assembly15.3.1.2.2 Light image: Electrode plate of secondary transfer roller inside ITB is deformed0018-4237Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080i / iR C2550[ Inspected by Canon Inc. ]DescriptionSince copy/print images were light, an adjustment was made to the electrode plate of the secondary transfer roller inside the ITB for solution.CauseSince the electrode plate of the secondary transfer roller inside the ITB was deformed, it lost a contact with the roller. This prevented the sufficient amountof toner from being transferred to paper, causing light image.Field Remedy1. Referring to the FAQ information titled "E020: Void in main scanning direction/light image throughout page: One side of ITB cover is not closed firmly",check to see if one side of the ITB cover loses a close fit to the chassis.2. If no problem was found in Step 1, check if the electrode plate of the secondary transfer roller of the ITB is deformed; if so, make an adjustment to theplate with longnose pliers.
