Xerox 4400DT Service Manual - Page 136
Envelope No Paper Sensor, Envelope No Paper Sensor Troubleshooting Procedure, Actions and Questions
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Envelope Feed Clutch Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes 3 Check the voltage between P/J23 Pin 4 and frame Replace the ground. Engine Logic Is the voltage 0.0 VDC? Board (RRP 9.3 on page 6-89). 4 1. Remove the Envelope Feeder from the Printer. Replace the 2. Remove the Bottom Cover (RRP 13.1 on Envelope page 6-157) and the Top Chute (RRP 13.2 on page 6-158). 3. Disconnect P/J413 from the Envelope Feeder PWB. 4. Measure the resistance between Pins 1 and 2 on the Feeder PWB (RRP 13.3 on page 6-159). disconnected plug. Is the resistance between 170 and 190 ohms? 5 1. Check the Envelope Feed Belts for wear and contamination. 2. Check for belts slipping. Are the belts in good condition and not slipping? Replace the Envelope Feed Clutch (RRP 13.12 on page 6-168). No Go to Install or Reseat the Envelope Feeder. on page 2-37. Replace the Envelope Feed Clutch (RRP 13.12 on page 6-168). Replace the belts as necessary. Envelope No Paper Sensor The printer incorrectly indicates a No Paper condition in the Envelope Feeder, or fails to indicate a No Paper condition in the Envelope Feeder. Envelope No Paper 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 Envelope No Paper Sensor and press OK. Engine Logic 3. Press and release the Envelope No Paper Sensor Actuator. Board (RRP 9.3 on Does the message on the Front Panel display page 6-89). alternate between Without Paper and With Paper as you press and release the actuator? 2 1. Switch the Printer power OFF. Go to step 3. Go to Install 2. Remove the Left Interface Cover (RRP 1.1 on or Reseat 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 check the voltage the Envelope Feeder. on page 2-37. between P/J23 Pin 4 and the frame ground. Is the voltage 0.0 VDC? 3 Check the voltage between P/J23 Pin 3 and frame Replace the Go to step 4. ground. Engine Logic Is the voltage +3.3 VDC with the Envelope Feeder No Paper Sensor de-actuated and 0.0 VDC with the sensor actuated? Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 3-39
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