Use this guide to remove the color wheel from your Optoma HD20.
Step 1 Cover
Twist focal cap clockwise until it is fully extended.
Remove focal cap by pulling it straight out.
Use a Phillips #1 screwdriver to remove the three 7.5mm screws on the bottom of the device.
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.
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.
Step 5 Color Wheel
Use the plastic opening tool to remove the wiring.
Use a Phillips #1 screwdriver to remove the 5.5 mm screws around the pin wheel.
Use a Phillips #1 screwdriver to remove 1 more 5.5 mm screw.
Using a flat head screw driver unscrew the back part to release the color wheel.
Do this carefully because these screws do not pull out.