2/2000DocuPrint N24, N32, N40, N3225, and N4025 7-57 Repair Analysis Procedures (RAP)RAP 7.36 Black PrintsPROBLEMThe entire print is black.1 Generate a Printer Engine Controller Test Print (5.4.4). The problem is still present.Y N| Replace the System Controller PWB (REP 4.10.7) or reload the Host Software2 Install a new EP Cartridge (PL 7.2). The problem is still present.Y N| Problem solved3 Remove the Upper Rear Cover Assembly (REP 4.1.3). Generate a System Controller Test Print(5.5.2.2.2) for Version 1.7X and below, (5.6.2.2.2) for Version 1.8X, or (5.7.2.12.2) for Version 2.0and switch OFF printer power halfway through the print cycle. Open the Left Upper Cover. Openthe Drum Shutter. Hand rotate (counterclockwise) the Main Drive Motor to advance the Drum farenough so you can see the developed image area on the Drum before it reached Transfer. Theimage on the drum is completely developed; with sharp, black, easily read areas and clear, whiteareas.Y N| Go to step 5.4 Replace the BTR Assembly (REP 4.5.2).5 Replace the System Controller PWB (REP 4.10.7). Generate a System Controller Test Print. Theproblem is still present.Y N| Problem solved.6 Replace the Printer Engine Controller PWB (REP 4.10.6). Generate a System Controller TestPrint. The problem is still present.Y N| Problem solved.7 Replace the Laser Assembly (REP 4.6.1). Generate a System Controller Test Print. The problemis still present.Y N| Problem solved.8 Replace the LVPS (REP 4.10.2). If the problem is still present, refer to the wiring diagramsSection (6) and check for a broken wire or loose connection between components in theXerographic sections of the printer.
