Question about Sony FD Trinitron WEGA XBRKV-40XBR800 40" TV

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RE:Control Board Failure

The control board, would that be th "D" board?

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  • WSLuck Mar 17, 2008

    Where my I purchase another D board?

  • WSLuck Mar 17, 2008

    I have already downloaded a service manual off the internet. In the troubleshooting section it recommends things to try or look at for all other codes except the code I have. It just doesn't point me in any direction.

  • WSLuck Mar 18, 2008

    Ok guys, I found on another forum for Sony TV problems a service bulletin pertaining to kv 3xxbr4xx series "D" boards. Although not the same models the same components. Service Bulletin: E28041743 D board failures, recommends changing 2 ICs: IC6501 and IC8002. Both ICs are Sony part no. 8-759-701-01 and printed on their top MCZ3001D. Iam going to install IC sockets for these ICs so I can replace them easier in case of another failure. This has been a very difficult problem to troubleshoot because with the back cover removed the set works fine, and installed the problem is intermittent. I thought this would be the best place to start, I will let you know the outcome.

  • Anonymous May 26, 2008

    Damn TV won't turn on and I have the 7 blinks of death show up.


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I have the KV-34-34HS420 with seven blinking led no power problem so I replaced both IC's and I used sockets because of the probable failure rate. I turned it on and it's been working perfect.We bought a new samsung because we thought we needed a new set.Oh well I guess the den will get a nice Sony TV now.I also think the big tube sony has a better picture.

Posted on Jun 06, 2010

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Well..the 'D' Board would show up on a parts list, authorized by the maker. You are encouraged to procure a proper service manual, which will go a long way to clear up any mysteries on this issue.

Posted on Mar 17, 2008

  • Patrick Michaels
    Patrick Michaels Mar 19, 2008

    hmmm...make certain that when those sockets go in, that you use non acid core solder.


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I have a Panasonic CT-30WX54. All of a sudden it stopped responding to the remote. I can only control it by the front panel buttons. My other cable remote that used to control it is also no longer working...

You answer to the fuse thing is NO.

what is the issue here? well its the control board that holds the IR sensor that has failed OR

The lens is so dirty that the infra red is not passing threw it so try to clean off the lens with some rubbing alcahol. If that does not work then your going to need to have the tv repaired a control board is upwards of $70 bucks with your labor.

I hope this does help please do not forget to rate and leave feedback.

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OK the bowed effect is an IC that controls the picture It replaces the flyback transformer of older TV's ( some plasmas still use transformers) Standard TVs nearly alsways have them
Doubhle vision ( ghosting is bad convergence)
Color variances Control caps on sustain or main color board.

Now these controls are spread over the two sustain or color board/s

Now some think that replacing these boards will fix their problem and many are right( at least for a while) But there is a penalty for DIY without knowing what voltages should flow from the control board to these parts. ( after all something caused it in the first place and it can be hard to find what was the offender)
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Replace all tact switches at the control panel... all switches is have bad resistance thats why your system is abnormal!


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Sony trinitron xbr red diagonal lines appears then screen turns red and then shuts off. The red led light blinks 7 times. Please Help!!!

In cannot remember if this model of set uses on the CRT drive board a drive IC for the CRT colour channels, or if it uses descrete transistors. I have had component failure on this board that causes your description. The failure in your case would be with the red channel drive. Most of the time I had the semiconductors fail, and some of the support components.

Most of the time, a failure on this board is caused by some intermittant internal arching inside of the CRT. If this happens, the CRT is starting go defective.

Another cause of this fault is that the CRT is starting to go internaly shorted between the control grid and screen grid. As it heats up, the shorting becomes lower in resistance, and thus causes the pricture to go brighter until the protection turns it off. This would be with the red electron-gun.

With any failure with the CRT, the set is not worth to fix even if you can find a CRT for it.

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Here is the info on your problem. These are problems that have been found in the field.

Found cold solder on IC201 on the A Board.
IC201 P/N
875210025 CRT Driver

Found IC9001 on the C Board defective.
IC9001 875936083 TDA6111Q/N4 Video Output

White balance failure 5 times 5:0 or 5:1 • Video OUT (IC9001-IC9003) is faulty. • No raster is generated.
(not balanced) (C Board) • CRT cathode current detection
• CRT drive (IC201) is faulty. (A Board) reference pulse output is small.
• G2 is improperly adjusted. (see Note 2)

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1 Answer

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Most of the time, it is some of the switches on the control panel.

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If the fault is just the control panel board, this can be easily replaced. You can order one from the manufacture's parts department or from one of their parts distributors.

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1 Answer

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