Hi this is Ron from Ron's Tron Tutorials.
Today I would like to show how I convert acheap LED projector into a pretty good home cinema projector.
For this I use the Excelvan CL720D for about150 $.
It has all sorts of connections, but I actually only need the HDMI port becauseI will hook the projector up to the PC, to play movies mostly.
Analog inputs and USB connections as wellas the built-in speakers I will not use.
This Keystone lever is a mechanical trapezoidadjustment for the image.
However, the image becomes blurred eitherat 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 placethe projector in front of the screen in the middle.
The projector has a nice bright picture andthe resolution of 720 pixels works fine for me for now.
The picture is excellent for the price.
Most important for a home cinema projectoris 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-costfans with better quality PC fans.
To do this, I turn the device around and takeout all the philips screws to open the case.
Be careful when removing the cover becausethe control panel is connected to the board with a cable.
Here you can see how the image is directedthrough a mirror to the lense and then to the wall.
Behind the mirror is where a radial is locatedwhich brings the air to the LCD panel to cool it.
In front of the panel you can see the keystonelense, which I think is useless.
The air then continues into the rear housingand is then pushed out by a second fan.
Here I have cut out the plastic slats of thehousing to have as little air resistance as possible.
That helps a little bit, but it's still reallyloud.
Both fans are therefore being replaced andI start with the radial fan.
To do this, I take off a part of the housingto 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 theright 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 radiali have to change the housing slightly.
I just use cardboard and double-sided tape.
I form a cardboard funnel, so that the newfan can bring the air nicely into the corner and behind the aperture.
I cut off the old fan cable so that I canconnect the new fan.
The new fan has a third cable for temperaturecontrol, 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 PureWings from BeQuiet.
Here I also remove a part of the case, thenthe fan cover can easily be removed.
It is important that the new fan is the samesize as the old one, so that it fits exactly.
Here also the air flow direction must be checkedduring installation.
The metal cooling ribs ensure cooling of theLED chip.
For a test, I turn the projector on and checkthe functions of both new fans.
Both fans run fine.
Now everything can be reassembled and thecase can be closed again.
There will be another video soon on how tomount the projector bracket.
At a distance of 3ft the noise test now onlyshows 18 dB, which is really nice and quiet.
The fan conversion for about 20 € was worthit.
With the new bracket, the beamer is locatedcentrally 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 hopethis video helps as many viewers as possible save money.
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