Phaser 4400 Laser Printer Service Manual 3-574 1. Remove the Print Cartridge.2. Inspect the Metal Grounding Contact on thePrint Cartridge Side Guide.Is the Metal Grounding Contact intactand free of contamination?Go to step 5. Reform or cleanthe Metal Ground-ing Contact, sothey make bettercontact with thedrum shaft, or re-place the PrintCartridge SideGuide (RRP 7.5on page 6-83).5 Check for continuity between the MetalGrounding Contact and the printer frame.Is there continuity between theGrounding Contact and the printerframe?Go to step 6. Replace the PrintCartridge SideGuide (RRP 7.5on page 6-83).6 Is the Transfer Roller intact and free ofcontamination?Go to step 7. Replace theTransfer RollerAssembly (RRP7.1 onpage 6-79).7 1. Generate a Test Print as in step 1 and switchOFF the printer power halfway through theprint cycle.2. Carefully remove the Print Cartridge andinspect the toner image on the drum justbefore the transfer area (Transfer Roller).Is the image on the drum completelydeveloped with sharp, black,easy-to-read areas?Go to step 8. Go toHigh-VoltagePower Supply(HVPS) Assemblyon page 3-31.8 Replace in order until the problem is solved: HVPS PWB (RRP 9.6 on page 6-92) Laser Assembly (RRP 7.4 on page 6-82) Transfer Roller Assembly (RRP 7.1 onpage 6-79), Engine Logic Board (RRP 9.3 on page 6-89). LVPS PWB (RRP 9.5 on page 6-91) Print Cartridge Side Guide (RRP 7.5 onpage 6-83)Blank Prints Troubleshooting Procedure (cont'd.)Step Actions and Questions Yes No
