Dell 2130cn Color Laser Printer - Manual (Page 103)

3. Close the side cover.
Replacing the Print Head Device (PHD) Unit
1. Ensure that the printer is turned off.
2. Pull the standard 250-sheet tray out of the printer carefully. Hold the tray with both hands, and remove it from the printer.
3. Press the side button and open the front cover.
4. Open the belt unit.
CAUTION: Before performing any of the following procedures, read and follow the safety instructions in your Product Information Guide.
NOTICE: To protect the drums of the Print Head Device (PHD) against bright light, close the belt unit within three minutes. If the belt unit remains open
for more than three minutes, print quality may deteriorate.
NOTICE: Ensure that nothing touches or scratches the surface (black-colored film) of the belt unit. Scratches, dirt, or oil from your hands on the film of
the belt unit may affect print quality.