Lexmark 4064-210 MS821n

Sensor tests

For non-touch-screen printer models, press [OK] to navigate through the settings.

1. Enter the Diagnostics menu, and then touch Additional input tray diagnostics.
2. From the Sensor tests section, touch Start.
   A dialog listing the sensor tests appears.
3. Find, and then manually toggle the sensor.

Notes:

• The sensor status on the screen toggles between 1 and 0 when the sensor is properly working.
• If a sensor test fails, the test failure may not indicate a failed sensor. Further troubleshooting may be required. Check the boards and cables for possible issues.

List of sensor tests

• Pick roller index (tray [x])
• Media out (tray [x])
• Pass‑through (tray [x])
• Media size (tray [x]) switch [x]
• Pick (tray [x])

Motor tests

For non-touch-screen printer models, press [OK] to navigate through the settings.

1. Enter the Diagnostics menu, and then navigate to:
   Additional input tray diagnostics > Motor tests
2. Select a motor, and then press or touch Start.

Notes:

• If the motor is activated, then it is properly working.
• Some motors require automatic deactivation in order to avoid secondary issues such as possible damage and contamination.
• Some tests require a special action to activate a motor such as removing a major component.
• If the motor fails, the test failure may not indicate a failed motor. Further troubleshooting may be required. Check the boards and cables for possible issues.