HP 8000dn Service Manual - Page 448

Note 7-bin Tabletop Mailbox Sensor Test This test allows you to check if all unit sensors are working properly. By activating any unit sensor flag, the service LED should turn on. 1 Make sure that all bins are empty to perform the sensor test. 2 Set the DIP switches for the sensor test (see table 7-28 on page 422). 3 Do NOT press the interlock switch in at this time. 4 Pull out the power supply switch to the test position. 5 Make sure that the service LED is off. 6 Manually activate any sensor flag. The service LED should turn on if the sensor is functional. To test the top cover or paper access door sensors, you need to press the interlock switch and simultaneously open and close each cover. A self-test should be performed, and the LED should remain on. Be sure to turn the power supply off and set all the DIP switches to the off position (normal settings) when you finish the diagnostics or the printer will not work properly. Replace the back cover. Table 7-29. Patterns of Flashing LEDs Long Short Meaning Recommended Action 3 1 Paper exit solenoid Perform the motor test to check the solenoids. malfunction Perform the sensor test. Replace the sensor bin full PCA, solenoids, or controller board. 2 1 Initial jam Open the top cover and paper access door to remove any remaining paper, then perform a sensor test. Replace the sensor bin full PCA or controller PCA. 2 2 Jam without delivery Open all covers and doors in the device, and notice remove any jammed paper. Check for paper jammed in the printer. Try printing again. 424 Chapter 7 Troubleshooting EN