Hi this is Ron from Ron’s Tron Tutorials. Today I would like to show how I convert a
cheap LED projector into a pretty good home cinema projector. For this I use the Excelvan CL720D for about
150 $. It has all sorts of connections, but I actually only need the HDMI port because
I will hook the projector up to the PC, to play movies mostly. Analog inputs and USB connections as well
as the built-in speakers I will not use. This Keystone lever is a mechanical trapezoid
adjustment for the image. However, the image becomes blurred either
at the top or at the bottom, since the lens can no longer focus the picture evenly. I will therefore not use the mechanical keystone. This is not a problem because I will place
the projector in front of the screen in the middle. The projector has a nice bright picture and
the resolution of 720 pixels works fine for me for now. The picture is excellent for the price. Most important for a home cinema projector
is of course a silent fan. I will measure the noise 3 ft from the projector. It is 38 dB. Or course this is way too loud. I am going to replace the built-in low-cost
fans with better quality PC fans. To do this, I turn the device around and take
out all the philips screws to open the case. Be careful when removing the cover because
the control panel is connected to the board with a cable. Here you can see how the image is directed
through a mirror to the lense and then to the wall. Behind the mirror is where a radial is located
which brings the air to the LCD panel to cool it. In front of the panel you can see the keystone
lense, which I think is useless. The air then continues into the rear housing
and is then pushed out by a second fan. Here I have cut out the plastic slats of the
housing to have as little air resistance as possible. That helps a little bit, but it’s still really
loud. Both fans are therefore being replaced and
I start with the radial fan. To do this, I take off a part of the housing
to get to the screw. Then it is easy to get it out. I will replace it with an 80mm BeQuiet fan. It is important that the fan is inserted the
right way around so that it pushes air in and not out. The arrows on the fan help. Because the new fan is axial and not radial
i have to change the housing slightly. I just use cardboard and double-sided tape. I form a cardboard funnel, so that the new
fan can bring the air nicely into the corner and behind the aperture. I cut off the old fan cable so that I can
connect the new fan. The new fan has a third cable for temperature
control, this cable is not connected. Now the second fan is replaced. Here I need a 92mm fan. So far I’ve had good results with the Pure
Wings from BeQuiet. Here I also remove a part of the case, then
the fan cover can easily be removed. It is important that the new fan is the same
size as the old one, so that it fits exactly. Here also the air flow direction must be checked
during installation. The metal cooling ribs ensure cooling of the
LED chip. For a test, I turn the projector on and check
the functions of both new fans. Both fans run fine. Now everything can be reassembled and the
case can be closed again. There will be another video soon on how to
mount the projector bracket. At a distance of 3ft the noise test now only
shows 18 dB, which is really nice and quiet. The fan conversion for about 20 € was worth
it. With the new bracket, the beamer is located
centrally in front of the screen and the keystone does not need to be used. I spent about 200 bucks total for this setup. I am very satisfied with the result and hope
this video helps as many viewers as possible save money. Please give me a like and share this video
if you liked it. Thank you for watching and please don’t forget
to subscribe, see you soon at Ron’s Tron Tutorials.

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