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 5 page image

Phaser 4400 Laser Printer Service Manual 3-1TroubleshootingIntroductionThis section covers two ty ubleshooting procedures: Troubleshooting proce problems not directly associated with errormessages or codes Troubleshooting Proce mage-quality (IQ) problemsTroubleshooting procedu rmally isolate a problem to a specific componentor subassembly, in some ding the wire harnesses.In the Yes/No steps of the s, a Yes/No response will either lead you to thenext step or will indicate e action. When you complete the indicatedcorrective action, restart t Check to verify that the problem has beencorrected.MeasuremePower and signal grounds are connected to frame ground. You can perform all circuittroubleshooting using the metal frame (chassis) as the grounding point. If you needmore information to locate connectors or test points, refer to Wiring Data on page 9-1.Unless otherwise specified, the following voltage tolerances are used within thissection:Section ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2Index of Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Image-Quality Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-41Index of Image-Quality Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . . . 3-41Image-Quality Troublesh ocedures . . . . . . . . . . . . . . . . . . . . . . . .3-53Index of Image-Quali ooting Procedures . . . . . . . . . . . . . . . . . . . 3-53Voltage MeasurementsStated Measured Stated Measured+3.3 VDC +3.0 to 3.6 VDC +24.0 VDC +21.6 to +26.4 VDC+5.0 VDC +4.8 to +5.2 VDC 0.0 VDC Less than +0.5 VDC

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