LG 42pc1d issues

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  • cliff_hootarski
    Badcaps Veteran
    • Jul 2006
    • 411
    • USA
    #21
    Re: LG 42pc1d issues

    I believe I recall seeing a way to test IPM's for shorts on Coppell's TV repair blog.

    http://blog.coppelltvrepair.com/2011...s-ipm-for.html

      Comment

      • QuantumCheese
        Member
        • Jan 2012
        • 35
        • UK
        #22
        Re: LG 42pc1d issues

        Originally posted by tom66
        Jealous. Only one variac, one bench supply and two scopes .

        Set your probe to 10X and make sure probe is 600V rated. Probe the Z-drive FFC output and check if the waveform is present (set scope to 5V/div, 100ms/div.)
        Flat as a pancake. about 20V dc on it - I think we have a winner here?
        Last edited by QuantumCheese; 01-22-2012, 09:59 AM.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK
            #23
            Re: LG 42pc1d issues

            Yep, that's bad.

            Check if there is 5V DC past the SMD fuse and if there is a 15V supply check that. (I can't remember if the Z-sustain has a 15V supply; but the Y-sustain definitely does.) The 15V is generated from the 5V input, I think.
            Last edited by tom66; 01-22-2012, 10:53 AM.
            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

              • brogdan
                Member
                • Jan 2013
                • 18
                • Romania
                #24
                Re: LG 42pc1d issues

                hello

                i also have a problem with a LG 42PC1D
                it came with blown fuse and shorted hybrid on ysus

                i changed the hybrid and the fuse, all power supply voltages are ok, but still no image.
                do you have any ideea?
                \i saw that on the mainboard(digital) there are some LEDs: L300 is off and L500-503 are on

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