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Thread: Running the XJ-A140 With Missing Diodes

  1. #51
    Join Date
    Dec 2010
    Location
    Moscow, Russia
    Posts
    8

    Default

    Quote Originally Posted by kobra000 View Post
    if a video could be made showing how to do this..oh man it would be a god send!..if even a picture showing the location of the contact pads would help.(if there is one i will be looking for it so please forgive me if i double up on topics already shown in pictures or discussed)

    .now with these mods will the function buttons/remote functions still work?..like how to get to the menu to adjust color (that ones iffy) or sharpness and contrast and format?

    DTR....let me know how you fair with that and what your technique was and if it was successful...have you previously modded these projectors for laser-less projection before?

    i wish i could download this forum directly to my brain! i need and want all the info in it.=)
    All buttons works good, but I don't test remote control (I think, it will work too).

    This is the 2 easiest ways to make modification illustrated on pictures below...
    Click image for larger version. 

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    OR

    Click image for larger version. 

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  2. #52
    Join Date
    Jul 2011
    Posts
    167

    Default cool

    cool cool that seems pretty straight forward.

  3. #53
    Join Date
    Apr 2006
    Location
    Miami, FL
    Posts
    3,580

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    didn't work for me

    /edit

    ok tried it again, it works, sort of, the projector is functioning (if I put my flashlight where the LD's were and look through the lens I can see my desktop) BUT, the red LED will not light... any suggestions?
    Last edited by flecom; 07-13-2011 at 19:39.

  4. #54
    Join Date
    Jul 2011
    Posts
    167

    Default

    Quote Originally Posted by flecom View Post
    didn't work for me

    /edit

    ok tried it again, it works, sort of, the projector is functioning (if I put my flashlight where the LD's were and look through the lens I can see my desktop) BUT, the red LED will not light... any suggestions?



    What color was your desktop while looking through the lens with a flashlight? im curious to see if the LCD is responsible for any color adding in this system ,if it is them perhaps we can still use a white HP led. i know the single LCD systems are rather easy to get a projection out of..take for example the virtually un-findable Citizens Mini projector circa 1990-1991...a single LCD with like a hardware store lightbulb behind it..or the Phillips LCP 5200 circa 1990-94 both very straight forward projectors with a single LCD and much like a hardware store flood lamp behind them. Im almost certain this can be done with the casio XJ-a...

  5. #55
    Join Date
    Apr 2006
    Location
    Miami, FL
    Posts
    3,580

    Default

    there is definitely some stuff going on with the dichros/filters...

    theres no LCD as this is a DLP projector

    I used a 3W LED flashlight pointed into the LD mirror and while looking into the lens to see the output I had shades of white/blue/green

    I was running a test pattern (google testpat.exe, its from IBM, thats what I was using)

  6. #56
    Join Date
    Jul 2011
    Posts
    167

    Default

    Wow no LCD?.

    then cany anyone idtenitf this peice..its from a this websight which shows acomplete tear down of the projector

    http://omegalabs.eu/html/kek_lezer.html

    .Click image for larger version. 

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  7. #57
    Join Date
    Apr 2008
    Location
    Poland
    Posts
    321

    Default

    DLP chip with PCB.

    Piotr.K

  8. #58
    Join Date
    Jul 2011
    Posts
    167

    Default

    Ok but light still passes through it to create the projection correct?

  9. #59
    Join Date
    Apr 2008
    Location
    Poland
    Posts
    321

    Default

    Nope, it's actually a mirror, a controlled array of 800.000 of mirrors.

    Piotr.K

  10. #60
    Join Date
    Jul 2011
    Posts
    167

    Default

    i was wondering since it uses a Phatlight Led for the red...would it be possible to run a blue phatlight led (and hope the phosphor wheel makes some green light) or just run a phatlight blue and phatlight green to complete the RGB color "gamut" i think is the word. Im exploring all avenues of LED light at this moment.from Phatlight LEDS to Luxeon Rebels,to the HiPow Chinese cartridge style LED's... Also does the wavelength of the Blue Lasers have an important bearing on it? like will the phosphor wheel only do its job when a 445nm Blue/IR/UV laser hits it? or will any blue light source suffice as long as it get through the lens gauntlet and into the DLP chip?

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