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Acer Al1715

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    #1

    Acer Al1715

    I have this acer AL1715 S witha a missing Green Signal color, monitor will turn on normally with NO missing color, when menu button press, OSD came out normally with NO missing color.

    But when monitor vga cable plug in a tested OK display card, monitor pic become bluesiest. when menu button press, OSD is perfect with its color, i can see RED, Green Blue at the color setting menu. if i try to set the Green color setting, i cannot notice any changes compare to Red & Blue setting

    I have check the PSU board - all seems to be working fine with 3.3v 5.0v 12.0v stable, I also check the VGA cable pin continuity to display board pin that came out tested ok, no broken cable...i have also measure the voltage with signal in ( vga plug to display card ) at the RGB pin on display board with R-0.285v G-0.282v B-0.30v

    i have even measure the reading after the smd resistor mark 0 until the spider IC which came out same reading as shown on the attach picture.

    any help is much appreaciate.

    thanks in Advance
    ktgoh
    Attached Files
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    #2
    Re: Acer Al1715

    Any chance the ribbon cable or the connector CN1 from the logic board to the LCD panel is damaged? Maybe check the pin and cables for continuity or ohm test?

    Originally posted by ktgohdt125
    I have this acer AL1715 S witha a missing Green Signal color
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      #3
      Re: Acer Al1715

      Your problem is likely on that logic board with the TSU16AK IC. The signal to the LCD panel is no longer RGB. It is digitized. So, if there is no green, then the problem is within this board you have been checking.

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        #4
        Re: Acer Al1715

        This might help you to trace it thru... but with just DMM, I dunno....
        Attached Files

        Comment

          #5
          Re: Acer Al1715

          OK, there are from a different brand & model that uses the same IC.

          So I think you are stuck...
          Attached Files

          Comment

            #6
            Re: Acer Al1715

            thank u retiredcaps & lucky13 for ur input... lucky13 thanks for the pin out diagram... is very helpful, i will try to trace the output signal from ic to LCD panel but i have to agreed with u that most probably this TSU16AK IC is failing, is it posible to get this IC?? & where??

            best regards
            ktgoh

            Comment

              #7
              Re: Acer Al1715

              Have you replaced the video signal cable between computer and monitor, especially VGA cable? And verified the proper operation of video card on that computer?

              Cheers, Wizard

              Comment

                #8
                Re: Acer Al1715

                Originally posted by Wizard
                Have you replaced the video signal cable between computer and monitor, especially VGA cable? And verified the proper operation of video card on that computer?

                Cheers, Wizard
                i hv check the vga cable pin to pin for continuity & show no sign of broken/short
                still figuring out cos i don't hv a similar unit for swap testing... but i believed is the logic board that giving me the headache.

                thanks wizard, i will double check the cable.

                ktgoh

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