Question about Hitachi 50V715 50" Rear Projection HDTV-Ready Television

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Hitachi 50V715 have a problem with yellow ghosting, several yellow shadows in a circle, very noticeable with white background. changed lamp no changes. HELP!!!

Posted by tobbonpace on

  • 5 more comments 
  • redsled03 Nov 05, 2007

    have 4 yellow ghost bands going from top to bottom

  • lowls Nov 26, 2007

    4 yellow ghost lines on the screen. I replaced the lamp twice and the problem is still there. Any ideas of what it could be?

  • Baspiso Dec 11, 2007

    I have the same issue but have not changed the lamp. Looking at the posts so far it may not be the lamp.

  • rcprod May 04, 2008

    I have a yellow circle in the middle of the screen. I had it diagnosed to be the light engine. Hitachi offers NO help. I'm looking for some kind of class action suit. This problem has existed for several years and these sets should last longer than 2 years. $1000 for repair is disgusting. Anyone else?

  • Wayne Mathews Oct 03, 2008

    I changed my lamp and i have too much yellow and gren and i cant adjust it out....where is the answer one of you sid it would cost 1000.00 to fix but what is it they will fix??????

  • sman_41 Nov 30, 2008

    I have the yellow circle and it is geting larger. It is now covering the majority of my screen. Any thoughts?

  • rqarnold Dec 23, 2008

    Same issue here. Have a rainbow shaped yellow tinted area on the screen. I never noticed it until our son mentioned it...now it seems to be all I see!

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1 Answer

Jim Epptech

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  • 101 Answers

This sounds like your light engine is going out. NOT GOOD! It all depends when you bought your set and if its under warranty. I had the same thing with mine bought is 2004, light engine died in 12/08 and was out of warranty. Talked to the rep. said they knew about the problem. They replaced my light engine for free but I had to have a authorized dealer install it . I had to pay for the labor $300, Now I've got another problem with it shutting down and back on.(That's another story.) I would call Hitachi and let them know that you know they have problems with this. Keep trying they may replace your to. To buy one out right is $400 to $500 plus labor, some folks have paid $800 to $1400 , That's a shame. Hope this is helpful. GOOD LUCK!!

Posted on Oct 23, 2009

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After changing the ink catridges and resetting the drum fuse lately (note: it is known that the fuse will be blown off after certain number of prints but otherwise is in good condition), my Epson Acculaser...


The repeating image is a ghost image, and here is described what it can be. Probably if you solve this, you also solve the red-dot problem. If possible, I would suggest to replace the wiper blade.
Repeating images on laser printerThis likely means a faint ghost of the main printout at a distance equal to the circumference of one of the rollers or photosensitive drum.

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First of all sorry for delay.
can you provide a image of yello shadow.I believe it seems to be technically say "ghost image"
If it is ghost image we can try by entering SERVICE Menu and adjust RGB level of the light engine.

Good luck
Dals123

Oct 04, 2008 | Hitachi 50V500 50 in. HD-Ready LCD...

2 Answers

Shadowing


GOOD DAY ND GOOD LUCK;

TRY THIS, IT WILL CORRECT CONCERN:

50V500 ONLY
GHOST: May be described as "Out of Convergence" but ghost is still attached to main image.
CONDITION:
A "ghost image" appearing to the left or right of images in the picture. Can be varying shades of a primary color (red, green, or blue) as well as gray. Can easily be seen in the 4 x 3 mode, at the edges of the picture.
CORRECTION:

To correct the problem, please do as follows:
  1. Access I2C Menu. (See page 57 of the Service Manual).
  1. To enter the I2C Service Menu, with power off, (on the front control panel) press and hold the INPUT button. Then press the POWER button for two seconds. The following Service Menu will appear.
03b_ghost_image01.gif Figure 1
  1. BEFORE CONTINUING: CONFIRM THAT THE R, G and B DRIVE ARE SET AT 40.
  • Be sure to press SELECT after each change to SAVE the new Data.


  1. Using the Remote Control joy stick, scroll down to next page (see Figure 2) until LCD ADJUST is highlighted.
03b_ghost_image02.gif Figure 2
  1. Move the joy stick to the right to cursor right once. The next page will appear with the word GHOST highlighted.
  2. Cursor right again, and a white screen will appear with a BLACK SQUARE in the center, as in Figure 3. You will see LCD ADJUST, followed by “SHP” and a number (value).
03b_ghost_image03.gif
Figure 3

  1. If the unit is out of adjustment, you will see a gray ghost on either side of the black square. Move the joystick to the right or to the left until the ghost disappears. The number values will change up or down.
    • If the ghost adjustment is off with a lower value, there will be a ghost to the left of the square.
    • If the ghost adjustment is off with a higher value, there will be a ghost to the right of the square.
  2. Once you get the square to look good without ghosts, press "SELECT" to save any data values that have been changed.
  3. Press the "EXIT" button three times to return to normal picture.
  4. Adjustment is completed
  5. I HOPE THIS WAS HELPFUL, big IRISH.




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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

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Shadows appear when printing out


Heating unit (fuser) 's teflon roll is dirty causing ghosting. Either replace with new heating unit (it is on front top near paper output) or clean it.
It can be cleaned carefully with electonic cleaning spray (non grease) WITHOUT using any force (be patient) wiping with cloth and spraying again and again utill it is clean. Then spray silocone spray to cloth and wipe teflon with that.
Open unit: Remove mains and usb/network leads. Remove paper holder (printed papers) from top back. Under that you'll see small arrows on both sides. Push screwdriver to hole and release locks. After that you can raise dark lid from top. Under that on white lid there is 4 screws, open them. Open all back cover scews and take the cover out lifting from bottom edge. Open 1 screw from right cover (where network socket is. Lift white top cover a little bit and then you can open right side cover (from back to forward). Under cover there is flat cable coming from display unit. Open it and then you can remove top white lid. Push the rest of dark paper holder backwards (on top) and it opens and you'll see the power supply under that. When looking from back there is 1 screw at right holding black plastic roller plate. Open the screw and bend the plate to left (looking from back) Now you can see 50% of brown teflon roll that is around the heater lamp. Clean it with spray and cloth pushing CAREFULLY from bottom to top.
Do NOT push teflon horizontaly as there is nothing on back of teflon and it may broke. Underside there is a metal plate under teflon and you can use LITTLE force for wiping. You can rotate teflon pushing white gear at top (from top to bottom, it turns only this direction). When totally clean, wipe with cloth sprayed with silicone spray.
I do not know how long this helps (just did it by myself) but the printing result is perfect again with same color casettes than before.

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