Xerox 4400DT Service Manual - Page 117
Registration Sensor, Registration Sensor Troubleshooting Procedure, Actions and Questions
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Registration Sensor Registration Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Sensor Tests. It appears Go to step 2. 2. Scroll to Registration Sensor and press OK. 3. Open the Front Cover. 4. With a strip of paper, actuate and deactuate the Registration Sensor. that the Registration Sensor is working Does the message on the Front Panel display correctly. If a change from "With Paper" to "Without Paper" as you press and release the actuator? problem persists, replace the Engine Logic Board (RRP 9.3 on page 6-89). 2 Does the actuator move freely and is it in good Go to step 3. Replace the condition (not broken or damaged)? Registration Actuator (RRP 5.3 on page 6-60). 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/J23 pin 11 and frame ground. Is the voltage +3.3 VDC with the Registration Sensor deactuated, and 0.0 VDC with the Registration Sensor actuated? 4 1. Switch the printer power OFF. 2. Remove the Left Front Cover (RRP 1.7 on page 6-12). 3. Switch the printer power ON. 4. On the Connector PWB, measure the voltage between P/J43 pin 5 and frame ground. Replace the Connector PWB (RRP 9.7 on page 6-94). Go to step 5. Is the voltage +3.3 VDC with the Registration Sensor deactuated, and 0.0 VDC with the Registration Sensor actuated? 5 Check the voltage between P/J43 pin 3 and frame ground. Is the voltage 1.2 VDC? Replace the Registration Sensor (RRP 5.4 on page 6-61). Replace the Engine Logic Board (RRP 9.3 on page 6-89). 3-20 Phaser 4400 Laser Printer Service Manual
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