Question about LG DU-42PX12XC 42 in. Plasma HDTV

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I have replaced the control board with a new 6871QCH060Q board and the vertical red stripe is no longer a problem. I now have horizontal streaks and the screen flickers mirror images that seem to cause momentary screen blackouts. I have reseated the ribbon cables several times but the problem refuses to go away. The fact that the circuits become confused as to right and left seems to me should be telling as to where the problem lies. Can anybody point me to a specific cause?

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Bad installation of the timer control board.
The cable conected to the control board needs to be checked to make sure it is properly conected.

Posted on May 27, 2009

  • Carlos Figueroa May 27, 2009

    Bad installation of the timer control board.
    The cable conected to the control board needs to be checked to make sure it is properly conected.

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How do i re align the head on aMX432 cannon


  1. Open the printer driver setup window
  2. Click Custom Settings on the Maintenance tabThe Custom Settings dialog box opens.
  3. Switch head alignment to manual
    Check the Align heads manually check box.
  4. Apply the settings
    Click OK and when the confirmation message appears, click OK.
  5. Click Print Head Alignment on the Maintenance tab
    The Start Print Head Alignment dialog box opens.
  6. Load paper in the machine
    Load three sheets of A4 size or Letter size plain paper into the front tray.
  7. Execute head alignment
    Make sure that the machine is on and click Align Print Head.
    Follow the instruction in the message.
  8. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
    Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
    print_pattern1.gif
    When you have entered all the necessary values, click OK.
    [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
      vertical.gif(A) Least noticeable vertical streaks
      (B) Most noticeable vertical streaks
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal streaks.
      horizontal_black.gif
      (A) Least noticeable horizontal streaks
      (B) Most noticeable horizontal streaks
  9. Confirm the displayed message and click OK
    The second pattern is printed.
  10. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
    Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
    print_pattern2.gif
    When you have entered all the necessary values, click OK.
    [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
      vertical.gif(A) Least noticeable vertical streaks
      (B) Most noticeable vertical streaks
  11. Confirm the displayed message and click OK
    The third pattern is printed.
  12. Check the printed pattern
    Enter the numbers of the patterns with the least noticeable horizontal stripes in the associated boxes.
    Even if the patterns with the least noticeable horizontal stripes are clicked in the preview window, their numbers are automatically entered in the associated boxes.
    print_pattern3.gif
    When you have entered all the necessary values, click OK.
    [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal stripes.
      horizontal_cyan.gif(A) Least noticeable horizontal stripes
      (B) Most noticeable horizontal stripes

Jan 05, 2015 | Cannon Office Equipment & Supplies

1 Answer

Stripes horizontal


The manual on page 122 says:
Vertical streaks appear when you are shooting a very bright subject. Cause / Solution : The smear phenomenon is occurring. This phenomenon is not a malfunction.
So when you are photographing in bad light, and some where in the frame is a bright light, from that light, white vertical strips can occur.
But you mention Horizontal lines. If this happens in normal light, outside, or in every light condition, something else must be wrong.
I wonder if bringing a 10 year old camera to a repair store or Sony service centre is worth doing.

Jan 28, 2014 | Sony Cyber-Shot DSC-V3 Digital Camera

1 Answer

I am getting stripes across my picture when I use my digital camera. How can I fix this problem? I have an Olympus Camedia c-5050 digital zoom


IF the stripes are on the pic and not in the monitor, your CCD is failing. It is made of many horizontal and vertical traces, the Vertical traces usually go and are a thin red line. If the lines are fatter than 1 pixel, then your CCD is exhibiting moisture ingress that is common with this camera and it is not repairable due to parts no longer made unless you want to replace the CCD chip on the daughterboard yourself.

Sep 24, 2012 | Olympus Camedia C-5050 Zoom Digital Camera

1 Answer

This started out as error 5200. Now, my Canon MX340 printer isn't connecting to the computer. The computer acts like the printer hasn't been installed. I tried to remove the printhead and restart...


Issue: How do I align the print head?
Solution: Perform a Print Head Alignment (Windows)- MX340

Aligning the Print Head Position Print head alignment corrects the installation positions of the print head and improves deviated colors and lines. The procedure for performing print head alignment is as follows:

alignike.gif Print Head Alignment

  1. Open the printer driver setup window
    • In Windows Vista, select the Start menu -> Control Panel -> Hardware and Sound -> Printers.

    • In Windows XP, select the Start menu -> Control Panel -> Printers and Other Hardware -> Printers and Faxes.

    • In Windows 2000, select the Start menu -> Settings -> Printers.


  2. Right-click your model name icon, and then select Printing Preferences from the displayed menu.

    The printer driver setup window appears.

  3. Click Custom Settings on the Maintenance tab.
    The Custom Settings dialog box opens.

  4. Check the Align heads manually check box.

  5. Click Send, and click OK when the confirmation message appears.

  6. Click Print Head Alignment alignike.gif on the Maintenance tab The Start Print Head Alignment dialog box opens.



  7. Load three sheets of A4 size or Letter size plain paper into the rear tray (3).

    t_10410ce_mx34014.jpg

  8. Execute head alignment Make sure that the machine is on and click Align Print Head.
    Follow the instruction in the message.

  9. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
    Clicking the patterns with the least amount of streaks in the preview window, will automatically set their numbers in the associated boxes.

    print_pattern1.gif

  10. When you have entered all the necessary values, click OK.

    Note:
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical white streaks.

      vertical_ab.gif
      (A) Less noticeable vertical white streaks
      (B) More noticeable vertical white streaks

    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal white streaks.

      horizontal_ab_black.gif
      (A) Less noticeable horizontal white streaks
      (B) More noticeable horizontal white streaks

  11. Confirm the displayed message and click OK.
    The second pattern is printed.
    Important: Do not open the Scanning Unit (Cover) while printing is in progress.

  12. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.

    Clicking the patterns with the least amount of streaks in the preview window, will automatically set their numbers in the associated boxes.

    print_pattern2.gif

  13. When you have entered all the necessary values, click OK.

    Note:
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical white streaks.

      vertical_ab.gif
      (A) Less noticeable vertical white streaks
      (B) More noticeable vertical white streaks


  14. Confirm the displayed message and click OK.
    The third pattern is printed.
    Important: Do not open the Scanning Unit (Cover) while printing is in progress.

  15. Check the printed pattern
    Enter the numbers of the patterns with the least noticeable horizontal stripes in the associated boxes.

    Clicking the patterns with the least noticeable horizontal stripes in the preview window, will automatically set their numbers in the associated boxes.

    print_pattern3.gif

  16. When you have entered all the necessary values, click OK.

    Note:
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal white stripes.

      horizontal_ab_cyan.gif
      (A) Less noticeable horizontal white stripes
      (B) More noticeable horizontal white stripes
Note: To print and check the current setting, open the Start Print Head Alignment dialog box, and click Print Alignment Value.

Aug 11, 2011 | Canon PIXMA MX340 Wireless Office...

1 Answer

I have Panasonic PT-LC75U bought in 2003, with 740hrs on my 2nd bulb. I have red vertical streaks that appear on the image after warm up, and get worse (more streaks) the longer the projector is on. I...


Steve, your issue is not the bulb...

Sounds like you have a problem with either a ribbon cable from your main board to red LCD panel, or a main board failure.

Aug 15, 2010 | Panasonic PT LC75U Multimedia Projector

1 Answer

CLP-500 vertical streaks & a horizontal line with blotches appearing randomly


I've refilled the toner cartridges a few times now and never had a problem with vertical streaks until recently. I refilled both the cyan and magenta and when I ran the test page I had dark vertical streaks on both sides. I fiddled around cleaning things, running cleaning paper through, changing reset resistors but to no avail so eventually decided to buy a replacement refurbished cyan cartridge since the streaks looked mainly blue and bingo... well almost now I just have very light magenta streaks. The issue is obvious when I compared the old and new cartridge, the replacement toner is a much duller cyan and is of the wrong consistency since once it's been in the printer everything gets covered in it which is why I think it causes the banding to occur. I'm just trying to work out now whether to try refilling the magenta again (v. messy) or just go for another refurbished cartridge (£34).

Jun 12, 2008 | Samsung CLP-500 Laser Printer

2 Answers

LG Plasma TV RU-42PZ61 vertical bars of all colors


sounds like your deflection circuit is weak..seems a power supply issue is at hand..what documentation do you have in your possession?

Mar 29, 2008 | LG RU-42PZ61 42 in. HD-Ready Plasma...

5 Answers

Vertical Red Line


I had a bright red 1" wide vertical line on the right side of my Vizio P42HDE as well as an equivalent Green line on the left. Sometimes a Blue line would appear adjacent to the red line. Had this TV sinc Oct. 2005. Based on internet research, I opted to purchase an LG 6871QCH060Q board (upgrade to the 6871QCH038A and the 6871QCH038C). Picked the board up on Ebay for $100 + $10 shipping from ShopJimmy parts.

From start to finish, this took about 2 hours to repair. Tons of screws to remove. Took me a while to figure out that the video connection unit in the back is completely modular and needs to be removed before attempting to remove the back cover. Once the cover was removed, I was surprised that I could not see where the replacement board was located. Turns out, you have to go one level deeper and remove the audio board and digital board followed by metal bracket/cover. Once removing the metal cover, the bad 6871QCH038A board was visible. A couple of zip ties will need to be cut as well as several cable connections to get to the 6871QCH038A board. Replaced the board with the 6871QCH060Q upgrade. Make sure to keep the sticky foam rubber isolation pieces and adhere them to the new board. It did take some time to figure out how to disconnect and reconnect all the various types of cable connections. Just take your time. The power cable connector for the 6871QCH060Q board is in a different location, thus I had to reroute the cable. Reassembled and only had 2 unused screws left!

TV workd great. Lines are gone. Have a little burn-in going on where the red line appeared, but still better than forking over $800 for a new 42" LCD 1080P TV. Hope to get a couple of more years out of this Vizio.

One line I found has a general example of LG/Vizio repair manual. Not exact, but close enough...http://www.scribd.com/doc/7580885/LG-TV-Plasma-Training-Manual

Oct 23, 2007 | Vizio P2 42 in. HD-Ready Plasma Television

1 Answer

No horizontal red convergence control


Probably the red convergence output IC has failed. The chip is basically a stereo amplifier that serves as a horizontal amplifier and a vertical amplifier. I suspect the vertical part has failed and is not uncommon. Should be generic STK392-150's or maybe STK392-110/120 I believe. By the way when the line moves up and down that means the vertical is working when it moves side to side the horizontal is working.

Feb 03, 2007 | Philips 60PP9202 60" Rear Projection...

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