Xerox 4400DT Service Manual - Page 121
Print Cartridge Sensor Assembly, Print Cartridge Sensor Assembly Troubleshooting Procedure
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Stack Height Sensor Checkout Procedure (cont'd.) Step Actions and Questions 3 Check out the Tray Motor (Tray Motor Assembly Checkout on page 3-26). Is the Tray Motor operating correctly? Yes No Replace in order: I Feeder PWB (RRP 3.9 on page 6-37). I Size PWB (RRP 3.13 on page 6-42 or RRP 11.19 page 6-139) I Engine Logic Board (RRP 9.3 on page 6-89). Replace the Motor Assembly (RRP 2.4 on page 6-24). Stack Height Sensor Voltages Test Point Top pin on sensora Sensor Unblocked Voltage Sensor Blocked Voltage 0.134 VDC 3.25 VDC Middle pin on sensor Bottom pin on sensor 0 VDC 1.2 VDC 0 VDC 1.2 VDC a. "Top pin" refers to the pin at the top of the connector when the sensor is installed in the printer. Print Cartridge Sensor Assembly Print Cartridge Sensor Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Open the Front Cover and remove the Print Go to step 2. Replace the Cartridge. 2. Inspect the tab on the top of the Print Cartridge that actuates the Print Cartridge Sensor Assembly. Print Cartridge (PL 8.1 Drive and Is the tab on the Print Cartridge intact? Xerographics on page 7-20). 2 Press and release the Print Cartridge Sensor Assembly Go to step 3. Replace the Actuator. Print Does the Print Cartridge Sensor Assembly Actuator lever move smoothly? Cartridge Sensor Assembly (RRP 7.3 on page 6-81). 3-24 Phaser 4400 Laser Printer Service Manual
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