3-16 Phaser 3635MFPIQ15, IQ16Draft 4Image QualityIQ15 Different Image Density (Left and Right) RAPUse this RAP when the printed sheets have different areas of image density across the pro-cess direction. An example is shown in Figure 1.Figure 1 Image densityProcedureWARNINGSwitch off the electricity to the machine. Disconnect the power cord from the customersupply while performing tasks that do not need electricity. Electricity can cause death orinjury. Moving parts can cause injury.Perform the following:1. The transfer roll pressure may be unbalanced. Check the spring pressure at each end, PL9.10. Install new components as necessary, PL 9.10.2. Shake the print cartridge to evenly distribute the toner. If necessary, install a new printcartridge, PL 9.10 Item 1.3. If necessary, install a new print cartridge, PL 9.10 Item 1.4. Perform the Shading Test procedure, GP 15. If the shading test fails:a. Install new components as necessary:• CCD module, PL 14.10 Item 8.• CCD module cable, PL 14.10 Item 23.• Scanner assembly, PL 14.10 Item 26.b. Perform OF7 Main PWB Check RAP.IQ16 Horizontal Bands RAPUse this RAP when the image has bands appearing across the process direction. An exampleis shown in Figure 1.Figure 1 Horizontal bandsProcedureWARNINGSwitch off the electricity to the machine. Disconnect the power cord from the customersupply while performing tasks that do not need electricity. Electricity can cause death orinjury. Moving parts can cause injury.Perform the following:1. Refer to Wiring Diagram 2. Check the spring contacts between the HVPS PL 1.10 Item 3and the print cartridge PL 9.10 Item 1. The spring contacts supply the voltages to the printcartridge. If necessary, clean the spring contacts.2. If necessary, install a new print cartridge, PL 9.10 Item 1.3. Measure the distance between the image and the defect. Refer to Table 1 to determinethe possible cause of the defect.Table 1 Defect distanceDefect distance Roll Component Parts List Ref.95mm (3.7 inches) Xerographic drum Print cartridge PL 9.10 Item 138mm (1.5 inches) Charge roll Print cartridge PL 9.10 Item 145mm (1.8 inches) Supply roll Print cartridge PL 9.10 Item 147mm (1.9 inches) Transfer roll Transfer roll PL 9.10 Item 289mm (3.5 inches) Heat roll Fuser assembly PL 10.15 Item 151mm (2 inches) Pressure roll 1 Fuser assembly PL 10.15 Item 264mm (2.5 inches) Pressure roll 2 Fuser assembly PL 10.15 Item 3
