Lexmark W820 Service Manual page 238

Use this procedure to remove and replace the Paper Size Sensors for Trays 1 and 2.
Removal
Tray 1 Paper Size Sensor
1.
2.
3.
4.
5.
6.
Tray 2 Paper Size Sensor
1.
2.
3.
4.
5.
Replacement
Tray 1 Paper Size Sensor
1.
2.
3.
4.
5.
6.
7.
Tray 2 Paper Size Sensor
1.
2.
3.
4.
5.
6.
4-30
Service Manual
Remove the Rear Cover Assembly.
Remove the I/O PWB.
Remove the High Voltage Power Supply Assembly.
Remove Paper Tray 1 from the printer.
Disconnect the P/J from the Size Sensor PWB.
Remove the screws securing the Size Sensor PWB to the printer frame, pull the
PWB straight out, and remove it from the frame.
Remove the Rear Cover ITM.
Remove the 220 VAC Transformer.
Remove Paper Tray 2 from the printer.
Disconnect the P/J from the Size Sensor PWB.
Remove the screws securing the Size Sensor PWB to the printer frame, pull the
PWB straight out, and remove it from the frame.
Reinstall the Paper Size Sensor PWB onto the printer frame. Align the positioning
tabs and screw holes.
Reconnect the P/J to the Size Sensor PWB.
Use the screws to secure the PWB to the frame.
Reinstall the Paper Tray.
Reinstall the High Voltage Power Supply Assembly.
Reinstall the I/O PWB.
Reinstall the Rear Cover Assembly.
Reinstall the Paper Size Sensor PWB onto the printer frame. Align the positioning
tabs and screw holes.
Reconnect the P/J to the Size Sensor PWB.
Use the screws to secure the PWB to the frame.
Reinstall the Paper Tray.
Reinstall the 220 VAC Transformer.
Reinstall the Rear Cover Assembly.
4025-XXX