Xerox 4400DT Service Manual - Page 119
Tray 1 No Paper Sensor, Output Tray Full Sensor, Tray 1 No Paper Sensor Troubleshooting Procedure
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Tray 1 No Paper Sensor Tray 1 No Paper Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Remove Tray 1. It appears Go to step 2. 2. Enter Service Diagnostics and select Sensor Tests. 3. Scroll to Tray 1 Low Paper Sensor and press OK. 4. Actuate and deactuate the Tray 1 No Paper Sensor Actuator. that the Tray 1 No Paper Sensor is working Does the message on the Front Panel display correctly. If a alternate between With Paper and Without Paper problem as you press and release the actuator? persists, replace the Engine Logic Board (RRP 9.3 on page 6-89). 2 Visually inspect the Tray 1 No Paper Sensor Actuator. Go to step 3. Replace the Does the actuator move freely and is it in good condition (not broken or damaged)? Tray 1 No Paper Actuator (RRP 3.3 on page 6-30). 3 1. Switch the printer power OFF. Replace the Go to step 4. 2. Remove the Left Interface Cover (RRP 1.1 on Engine Logic page 6-6), Left Cover (RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Switch the printer power ON. 4. On the Engine Logic Board, measure the voltage Board (RRP 9.3 on page 6-89). between P/J33 pin 2 and frame ground as you actuate and deactuate the No Paper Sensor. Is the voltage 3.3 VDC with the sensor deactuated, and 0.0 VDC with the sensor actuated? 4 Check the voltage between P/J33 pin 8 and frame ground. Is the voltage 3.3 VDC? Replace the Tray 1 Feeder PWB (RRP 3.9 on page 6-37). Replace the Engine Logic Board (RRP 9.3 on page 6-89). Output Tray Full Sensor Output Tray Full Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Sensor Tests. Replace the Go to step 2. 2. Scroll to Output Tray Full Sensor test and press OK. 3. Lift and release the Output Tray Full Sensor Actuator several times. Engine Logic Board (RRP 9.3 on Does the message on the Front Panel display page 6-89). alternate between "Full" and "Not Full" as you lift and release the actuator? 3-22 Phaser 4400 Laser Printer Service Manual
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