Change the Hitachi CP-X505 projector lamp

Hitachi-CP-X505_Hitachi_DT00771_projector_lampIt’s not difficult to replace the projector lamp in your Hitachi CP-X505 projector. Keep reading to learn more.

First step: Buy authentic

If you want your Hitachi CP-X505 projector to keep working working at its best be sure to install an authentic projector lamp. You’ll need a Hitachi DT00771 CPX605 lamp.

Look for the seal of approval and avoid generics. With their inferior parts, combined with a shorter life means counterfeit projector lamps cost you more in the end. Avoid exposure to the toxic materials and parts used to create the lamps and keep your warranty in place.

Signs your projector lamp needs to be replaced:

  • Hitachi CP-X505 Lamp Indicator light will start flashing red.
  • Color tone on the screen may also appear weak or washed out.
  • Picture has poor colour quality.
  • You may notice the Hitachi DT00771 CPX605 starts to go dark after being used for long period of time. It does have a finite life and trying to force it to work beyond its normal life can damage your Hitachi CP-X505 projector.

Replace the Hitachi DT00771

Hitachi-CP-X505_Hitachi_DT00771_projector_lamp_cover_screwTurn the Hitachi CP-X505 projector off, and unplug the power cord. Allow the projector to cool for at least 45 minutes. It should be cool to the touch. This projector works using high heat and there is danger you can be burned.

NOTE:  If the projector is mounted on the ceiling, don’t stand underneath the projector while opening the cover.



Hitachi-CP-X505_Hitachi_DT00771_projector_lamp_remove_coverLoosen the screw on the lamp cover (marked with an X).  Slide the cover to off the projector and set it one side.

Hitachi-CP-X505_Hitachi_DT00771_projector_lamp_handlesLoosen the three screws holding the Hitachi DT00771 CPX605 projector lamp in place. Slowly pick up the projector lamp by its handle and pull out taking care not to bang the bulb on the side of the projector. If you do shatter the bulb, you will need take time to properly clean the projector. Learn how to clean up a broken lamp.

NOTE: The Hitachi DT00771 projector lamp contains mercury and should be properly recycled. Don’t place it into regular garbage.

Finish the installation:

  • Insert the new Hitachi DT00771 CPX605 projector lamp making sure to line it up properly and tighten the three lamp screws.
  • Slide the cover back onto the projector, lock it in place and fasten the screw.
  • Turn on the projector and set the lamp time:

To reset the lamp timer:

Hitachi_DT00771_reset_lamp_timerNote: Reset the projector lamp time only when you have replaced the lamp so the Hitachi CP-X505 projector can properly track the lamp life. Otherwise you run the risk of using the lamp beyond its lamp life.

Press the MENU button

  • Scroll down to the GO TO ADVANCED MENU option. Press ENTER
  • Scroll down to the OPTION menu in the left column and press ENTER.
  • Scroll down to LAMP TIME. Press ENTER To make a dialogue field appear
  • Scroll up to the RESET option on the dialogue box.
  • The lamp setting will be set to zero.

Get more hours from your Hitachi DT00771 CPX605 by keeping your air filters clean to avoid overheating the projector. Learn more with Top tips for extending DLP projector lamp life.

Go green, save money

Hitachi_Replace_BulbIf you are looking for a green alternative, why not consider changing only the bulb and leaving the housing for the bulb. Our training video shows you how simple it is.




  1. Sunita Roodal

    Ok I did all the above steps now my projector has a red spot on the left hand corner of the projection. What can be the cause of this?

    1. Shelagh McNally

      Hi Sunita,
      The red spot in the left hand corner is probably a color wheel ballast problem and have nothing to do with the projector lamp. I suggest you join our forum for more help or contact your local Hitachi dealer to find out if they will replace the color wheel.

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