Funai LCD-A2006, from 4 secs to off, to a vertical black stripe.

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  • senndogg
    Badcaps Veteran
    • Dec 2011
    • 383
    • Albania

    #1

    Funai LCD-A2006, from 4 secs to off, to a vertical black stripe.

    hello.
    i have in my hands an old tv set a 2006 Funai 20" 3:4 lcd.
    it had been opened before but not repaired from other technicians.

    the symptoms:
    the tv turned on, normal, but i could distinguish a dimmed 1/3 horizontal middle section. despite this, the tv worked well for 4 seconds. then it dimmed for one second and then TOTALLY off. not just the backlight, but the whole set.

    supposing...
    i supposed (without opening) there were 3 pair of CCFLs/transformers/FETs and one pair was faulty (since 1/3 of the screen was not backlited).

    tested:
    the inverter board and the main board had the (-) ground, the +22V and a third ON wire. voltages all ok.
    i disconnected the third wire and guess what, the set was not put in stand by any more. the backlight was ON, although dimmed but the 4 seconds to off problem was not there. so, i have a problem with the backlighting which as the third wire reports.
    BUT, another problem happened. the image was not ok.
    it is splitted by a vertcal stripe. reseating the ribbond did not help.
    now, i am not willing to troubleshoot the backlight problem if this stripe thing is serious. voltages on the t-con seemed ok.
    is it an aging lcd?
    was a coincidence that happened just when i disconnected the communication wire between the inverter board an the main board?
    any ideas and suggestions are appreciated.
    thank you.
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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Funai LCD-A2006, from 4 secs to off, to a vertical black stripe.

    Could be a T-con fault - depends if the T-con is easily replaceable and cheap... IIRC on this set they integrated the T-con with the main processing board.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • senndogg
      Badcaps Veteran
      • Dec 2011
      • 383
      • Albania

      #3
      Re: Funai LCD-A2006, from 4 secs to off, to a vertical black stripe.

      yes, but after the t-con, i will be dealing with the backlight problem which can require ccfls tranfrms or fets. i personally dont feel like spending much on this 3:4 20" old lcd. do you?

      Comment

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