Question about Yamaha LPX500 Multimedia Projector

4 Answers

Top banner from ballgame remains faintly visible

Watched the final 2 sox playoff games, during the first game the i noticed that during the commercials the shadow of the top info bar remained, the right hand most info said game 6, the next night the right hand said game 7. Now the shadow has not changed but the shadow remains on the top of the screen

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  • rlamon Oct 23, 2008

    I unplugged the projector for 10 minutes, the banner is still barely visible.

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Hi rlamon,

Sounds like a image burn in which is not good and may require servicing of your unit. But for I suggest that you try to reset the projector, most projectors have reset switch, so try it. Also leaving the unit off for a like a day without using it may help to clear the burn in.

Also try to test the projector on other inputs like connecting on a computer or dvd player, and check to see if the faint image is still there. Sometimes it helps to clear those burn in if use a different input or a screensaver.

Hope these suggestions help!

Peace! :)

Posted on Oct 23, 2008

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A static shadow on a projector can be caused either from a foreign object (some part that had moved) between the lens and the lamp, or more probably from a mirror that had moved in the light tunnel.

In a projector, light generated from the lamp is projected trought the light tunnel (a square section tube covered with mirrors on the internal sides), in your case one of the mirror had probably detached, and that is causing the shadow. Otherwise, either the light tunnel, the lens , or the lamp are out of place.

To fix this the projector must be taken apart, and inspected inside.

Posted on Oct 23, 2008

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Sounds like your Mainboard will need repair or replacement if you only get a faint image...

Check if the unit is still under warranty as this could be a costly exercise.

Posted on Oct 22, 2008

  • AbdulRahiman S Oct 22, 2008

    For now, you can try to do a through cleaning and try to dust out the light path. 
    I do not know how deeply you want to dig into the thing but if you can get to it make sure the optics are clean. 
    Also look into the optical path while it is off and try to locate any weird films or dust. Sometimes hard to spot I know.



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Have you tried a hard reset?

by doing a hard reset you can solve these small problems

Posted on Oct 22, 2008

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2 Answers

My JVC DLA-X3-BU will not power on, 2 lights are red, lamp light is flashing orange, how do i get it to work?


I have a JVC DLA-X9-B projector which I think is the almost the same as the X7 and X3 the manual is the same.Its about 2 years old.It stopped working suddenly while I was watching a movie. Indicator lights were both on red and lamp light flashing orange. Replaced the lamp and it did not change the status,did cleaning filter bit , did lamp reset from the remote , did reboot and plugged it at a different ac outlet all that did not work . The lens cover is stuck at opened and the only thing you get when plugged in is the red light on and after 30 seconds the lamp light comes on orange .No fan came on no moving lens cover only flashing orange light.
From this conclusion was the power supply was working and software was a question mark either it was corrupt ,but the power cycle and lamp test start was normal and it checked the lamp and reported orange .So all the more it pointed to either the ballast or the power feeding the ballast.
I opened the projector up started with the screws at the bottom removed the the adjustable screw in legs. Removed the left and the right plastic cover ,then bottom cover, lamp cover, top cover plastic and then top metal plate cover, back cover until parts were all visible ,then put back the screw in legs a placed projector in an upright position. All this was in suspect that the ballast is the problem.
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-6.jpgThis is the top view photo.
On the right black plastic cover is the lamp fan and air duct.
At the center is the lens assembly and motors for focus lens shift etc.
on the left are stacks of electronics that are stacked board on board of about 4 or 5 layers.

jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-11.jpgthis is the side view of the stacks of boards, to get to the ballast these have to be removed.NOTE LABLE ALL CABLES AFTER REMOVING THEM AS THERE ARE MANY OF THEM.Remove the side plate

jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-18.jpg
Remove hdmi and land board,carefully there are connectors on bottom and all sides of this board.

jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-27.jpg jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-38.jpgthen remove the next board ,remember to lable all the cables.
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-51.jpgthen the next board bellow ,carefull this one has 2 side connectors on pictures top side
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-66.jpgthis will be what it looks like.Note the bottom most is the power supply.,This feeds the ballast as well as other low voltage Dc components.THE CONNECTOR WITH THE WHITE END AND BLACK AND RED CABELS IS THE BALLAST FEED(picture above) .The ballast is located in a black plastic box above the power supply.The only way to remove it is to continue dismantling further. jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-83.jpgthis is the top view and the yellow tags you are seeing is cable labelson the wires.

jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-102.jpgthis picture is with all boards removed to check for physical burn outs on components
mainly on power supply ballast feed and ballast itself.
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-123.jpgall boards out
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-146.jpgthis is the power supply board it has both low and high voltage output .Low for logic boards high output for ballast.Ballast feed from power supply should put out about 380 volts dc during projector boot up and zero during orange blinking light,(you can skip this removal of power supply if you read the 380 volts output on multimeter at boot up.Do this before taking all the boards apart but remove the side plate to access the output and check the output at boot up ,warning do not short this while reading output.
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-171.jpgpower board made by sumida and so is the ballast
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-198.jpgfinally the ballast is out this is what it looks like,do you see the dark grey wires they lead to the optocouplers (little led light sensing switch looks like a square little box all 3 are side by side)
jvc-dla-x3-bu-will-not-power-2-lights-zogl1yh0b34d0jvl0ocjipaz-3-227.jpg this resistor came out of the ballast ,notice physical damage like a hole in the center of it,tested it out of the board and yes its dead replaced this.
.Did all the checking one by one of the components then found one of the optocouplers had gone dead.The one located in the center of the 3 replaced that ,put it all back and got it working again.
The ballast cost 300 usd I bought one too and kept it handy just incase.
But for the meanwhile the old one is back and working just fine.

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1 Answer

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Hope this helps
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1 Answer

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check out fixmyprojector.com

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1 Answer

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I hope that helps.

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