3/99DocuPrint N24, N32 and N40 Service Manual 7-55 Repair Analysis Procedures (RAP)RAP 7.34 Light (Undertoned) PrintsPROBLEMThe overall image density is too light. The image may also be unfused dueto insufficient image density.1 The paper is smooth (not wrinkled) and undamaged.Y N| Load fresh, dry paper.2 Install a new EP Cartridge (PL 7.2). The problem is still present.Y N| Problem solved.3 Remove the Upper Rear Cover Assembly (REP 4.1.3). Generate a Printer Engine Controller TestPrint (5.4.4) and switch OFF printer power halfway through the print cycle. Open the Left UpperCover. Open the Drum Shutter. Hand rotate (counterclockwise) the Main Drive Motor to advancethe Drum far enough so you can see the developed image area on the Drum before it reachedTransfer. The image on the drum is completely developed; with sharp, black, easily to readareas.Y N| Replace the HVPS Assembly (REP 4.10.4).4 Carefully remove the Test Print generated in step 3. Inspect the print. The toner image on thedrum transferred completely to the paper. And the grid lines are black and unbroken.Y N| Replace the BTR Assembly (REP 4.5.2). If the problem persists, replace the HVPSAssembly (REP 4.10.4).5 Generate another Printer Engine Controller Test Print (5.4.4) and switch OFF printer power whenthe print is halfway through the Fuser. Open the Left Upper Cover. Examine the paper areasbefore the image enters the Fuser and after the image exits the Fuser. The image is normalbefore it enters the Fuser, but light when it exits the Fuser.Y N| Replace each component listed below, one at a time, until the problem disappears.Laser Assembly (REP 4.6.1).Printer Engine Controller PWB (REP 4.10.6).6 Replace the Fuser Assembly (REP 4.7.1).
