Use this guide to remove the fan from your Optoma HD20.

  1. Twist focal cap clockwise until it is fully extended.
    • Twist focal cap clockwise until it is fully extended.

    • Remove focal cap by pulling it straight out.

    The pictures don't really do justice to how hard it is to pop the focal cap off. One actually has to pull pretty hard, I was afraid of breaking something, but it all worked out.

    eislerzoltan - Reply

  2. Use a Phillips #1 screwdriver to remove the three 7.5mm screws on the bottom of the device.
    • Use a Phillips #1 screwdriver to remove the three 7.5mm screws on the bottom of the device.

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    • Use a plastic opening tool to gently pry the top cover off of the device.

    • It is easiest to pry off the cover from the back side just above the HDMI ports.

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    • When removing the cover, be cautious of the ribbon connecting the top buttons to the main circuit board. The ribbon must be disconnected before proceeding.

    • Remove the ribbon by disconnecting it from the main circuit board.

    • Lift up the clip holding it down and pull the ribbon out.

    The black part is the clip that lifts up. Then gently tug on the cable.

    The instructions are out of order here.

    dlwalter - Reply

    Wish I had read your comment before struggling with it for what seemed like hours.

    eislerzoltan -

    Any advice for if you rip that ribbon?

    robby_g - Reply

    • Peel off the tape that is holding the metal casing down.

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    • Use a Phillips #1 screwdriver to unscrew the nine 4.5mm screws.

    • Use a Phillips #0 screwdriver to unscrew the three 2.5 mm screws to be able to remove the metal casing.

    On mine, the bottom left red screw pictured doesn't hold the case (only circuit board), and there is an additional screw top middle, not pictured here, so still 9 total)

    Gyrovague - Reply

    • Remove the metal casing by lifting it up off of the circuit board.

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    • Unplug the six wires stemming from the circuit board.

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    • Use a Philips #1 screwdriver to remove the four 4.5 mm screws

    Mine doesn't have the rightmost screw pictured here, instead a screw in the corner of the board just out of top right of photo.

    Gyrovague - Reply

    • Remove three 4.5 mm screws using Philips #1 screwdriver

    The screw between the analogue inputs is longer and coarser pitch on my unit than the other two screws.

    Gyrovague - Reply

    • Remove the final two 4.5 mm screws connected to the motherboard using a 5 mm nut driver

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    • Slightly rotate motherboard clockwise to prevent ports from getting caught on the plastic backing

    • Lift up and remove plastic backing

    Note, board has a connector on the lens side, connecting to a vertical board behind the lens (probably DMD board). This is especially important to remember when reassembling!

    Gyrovague - Reply

    • Lift up the motherboard and take out the metal container once screws are removed.

    • Do this very carefully because there is still one cable attached.

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    • Unplug the white connector underneath the right side of the circuit board.

    • To remove, pinch both sides of the connector and pull it away from the circuit board.

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    • Use a Phillips #1 screwdriver to remove four 5 mm screws to take out the fan.

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    • Remove fan by first pulling it away from the metal housing unit and then up out of the device.

    Not mentioned here is that you pretty much need to bend the cardboard airflow director thing out the way, then sortof twist the fan out (can't pull backwards because the large heatsink is in the way).

    Gyrovague - Reply

    Putting the new fan in is quite tricky. I managed eventually, but it might be much easier to remove the large heatsink. Not sure how safe that is though.

    Gyrovague - Reply

    I replaced the larger lamp fan (KDE1285PTV1) after this, by removing the entire metal cage around the lamp (5 screws), this would have made replacing the small fan (GB1245PKVX-8) trivial, so I highly recommend doing it that way!

    Gyrovague - Reply


To reassemble your device, follow these instructions in reverse order.

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Member since: 01/22/2015

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Cal Poly, Team 21-23, Maness Winter 2015 Member of Cal Poly, Team 21-23, Maness Winter 2015


4 Members

6 Guides authored


Very nice set of instructions! Excellent images and identification of items to remove. Thank you!

Graveyard Workshop - Reply

Do you know where to get this fan for replacement? Having trouble finding a parts list.

Sterling Grogg - Reply

Small fan is GB1245PKVX-8, large fan is KDE1285PTV1

Gyrovague -

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