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Bad image Hope someone can help me with this: The image is distorted from center to left side such a half wave. Image is mostly green all over the screen. Could someone provide me with some tips such as from i should start and what to check? TKS

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  • salvayo Feb 13, 2008

    Thank you Mr. Bob,



    I will try to provide the most info that i could get:



    Description of problem: The image is a “wavy” image all over the screen but is more noticeable on the left side coming from the center to the left, the waves are green colored and they are about 6 inches of high from the base.

    The image seems like it has been pulled from top forming the wave so it means that you could see many lines along the vertical. Red and blue look the same, but the wave is about 1 inch high.



    The retro is a Philips Magnavox model PTV-805-AH01, with chassis 8P4831C101 and serial number 8405 8217.

    (This data is in a manufacturer label attached in the rear panel)



    First of all I checked the manual but it does not correspond with the physical items I found inside, example: the manual mentions is a DG8D DIGITAL CONVERGENCE PANEL - A10688, but the one that I have is:



    GR4D DIGITAL CONVERGENCE BOARD

    212343 F060B

    343F060T.SPB

    EIA232D



    And in a paper label has the following info:

    00A110535 B002

    CONV BD

    94405 M4P2



    The layout of the PCB is totally different.



    I looked for the STKs, as normally these models have, but instead a I found six heat sinks with two transistors each.



    I inspected the convergence board,visually, and i found an over-heated coil (labeled as L10).



    As you could imagine without the proper schematics is quite difficult to trace the failure.

    At this moment i do not know where to find the proper service manual for this unit or at least the diagram of this board as i suspect the problem is in the convergence area.



    Hope with this info you could help me.

    Thank you and b. regards

  • salvayo Feb 14, 2008

    Thank you for your comment.

    The problem is getting worst, I noticed that all parts and components inside the cabinet where changed in an earlier reparation ( about 4 year ago and without any notice from the technician ). The best thing is that it was working so i only have to find out now, with what type of device i am dealing with?



    In order to find out, i entered in a web page to get spare parts and i found that the Convergence board is used in the following philips TVs

    a.- 47 TP 60 and

    b.- FP 5360



    I am not sure about them so I will appreciate any advice in where could i get some info about them so i could get the proper service manual according with the PCB that i have.

    The only data that i have is the numbers printed in some of the PCBs.



    1.- GR4D MAIN POWER SUPPLY

    00APW047C003

    AFM009C003



    2.- RED BOARD

    00APT127A001



    GREEN BOARD

    00APT128A001



    BLUE BOARD

    00APT129A001



    3.- GR4D DIGITAL CONVERGENCE BOARD

    00A10535B002



    4.- PICTURE IN PICTURE MODULE

    00APP012E005



    Note: I took out the DCB and checked out the components, diodes, transistors, etc. including the coild and i did not find any shorted or open component ( i did that with a VOM )



    So, the proper service manual will help me alot.



    rgds.

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Not nearly enough info. Brand/model? Age? What does your descr mean? Mostly green?

Initially it looked like a convergence issue, then your descr did not attenst to that. Need further descr of your problem.


Mr Bob

Posted on Feb 13, 2008

  • Robert Jones
    Robert Jones Feb 14, 2008

    Sounds like a conv prob, but discrete and not using ICs. As such it will be difficult to pin down exactly what has to happen, esp. if you have seen a bad coil so far. Probably just the tip of the iceberg.



    You may have to get a local tech in on this one.





    Mr Bob

    www.imageperfection.com

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