Xerox Phaser 4400 Service Manual

Also see for Phaser 4 400: Specification sheet Support guide Setup guide Service manual Service manual

Contents

Xerox Phaser 4400 Service Manual Manual pdf 6 page image

3-2 Phaser 4400 Laser Printer Service ManualTroubleshooting ProceduresVerifying AC PowerThere is a possible problem with AC power.Warning: Improper connection of the grounding conductor canresult in the risk of electrical shock.The following must be observed: Never use a ground adapter plug to connect the machine to a power source. Never attempt any maintenance function that is not specifically called out inthe service procedures. Never remove any covers that are fastened with screws, unless so instructedin the service procedures.Caution: If any of the voltage measurements are not as specified inthe following steps, the cause must be corrected. Cautionthe customer NOT to connect the machine to the walloutlet. Advise the customer that a licensed electrician mustcorrect the wiring. Do not attempt to correct the wiringyourself. If you later find the condition has not beencorrected, inform your manager in writing of the improperwiring.Index of Troubleshooting ProceduresVerifying AC Power . . . . . . . . . . . . . . . . .3-2 Print Cartridge Sensor Assembly . . . . . 3-24DC Power (LVPS). . . . . . . . . . . . . . . . . . .3-4 Tray Motor Assembly Checkout . . . . . . 3-26DC Power Loading . . . . . . . . . . . . . . . . . .3-6 Registration Clutch . . . . . . . . . . . . . . . . 3-27Toner Sensor Failure . . . . . . . . . . . . . . . .3-8 Turn Roller Clutch Assembly . . . . . . . . . 3-28Inoperative Printer . . . . . . . . . . . . . . . . . .3-9 Tray 1 Feed Clutch . . . . . . . . . . . . . . . . 3-29Malfunctioning Front Panel. . . . . . . . . . .3-11 MPT Pick Up Solenoid . . . . . . . . . . . . . 3-30Inoperative Front Panel . . . . . . . . . . . . .3-13 Image Processor Isolation. . . . . . . . . . . 3-31Erratic Printer Operation. . . . . . . . . . . . .3-13 High-Voltage Power Supply (HVPS)Assembly. . . . . . . . . . . . . . . . . . . . . . . . 3-31Power Supply . . . . . . . . . . . . . . . . . . . . .3-14 Electrical Noise . . . . . . . . . . . . . . . . . . . 3-33Main Motor Assembly. . . . . . . . . . . . . . .3-15 Exit Sensor . . . . . . . . . . . . . . . . . . . . . . 3-34Laser Assembly . . . . . . . . . . . . . . . . . . .3-17 Exit Motor . . . . . . . . . . . . . . . . . . . . . . . 3-35Fuser Assembly . . . . . . . . . . . . . . . . . . .3-18 550-Sheet Feeder Feed Clutch . . . . . . . 3-36Registration Sensor . . . . . . . . . . . . . . . .3-20 Stacker Full Sensor . . . . . . . . . . . . . . . . 3-37MPT No Paper Sensor . . . . . . . . . . . . . .3-21 Stacker Offset Operation Not Performed3-38Tray 1 No Paper Sensor. . . . . . . . . . . . .3-22 Envelope Feed Clutch . . . . . . . . . . . . . . 3-38Output Tray Full Sensor . . . . . . . . . . . . .3-22 Envelope No Paper Sensor. . . . . . . . . . 3-39Stack Height Sensor Checkout. . . . . . . .3-23

/ 8

Related manuals for Xerox Phaser 4 400