L.G. 42PC1D, dark flickering pic.

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  • Alastair E
    Chief Womble
    • Mar 2013
    • 1963
    • U.K.
    #61
    Re: L.G. 42PC1D, dark flickering pic.

    Ah--Although--whats the 5V that comes from the same DC-DC converter driving?
    --Its a separate 5V supply from the transformer, via its own rec, filter and regulator....
    TELEFIX

    How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
    http://www.irf.com/technical-info/appnotes/an-1088.pdf
    PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK
        #62
        Re: L.G. 42PC1D, dark flickering pic.

        If relative to -Vy then I'd say it's for the buffers.
        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

          • Alastair E
            Chief Womble
            • Mar 2013
            • 1963
            • U.K.
            #63
            Re: L.G. 42PC1D, dark flickering pic.

            Ah--yes, Think its reffed to -Vy, next time the sets in bits--I'll take a look! Still working well at the mo, Given my 50PZ80 a sabatical, need to find why the grey-scale has gone a bit pink on it!
            (It was too big for the room anyway!)
            TELEFIX

            How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
            http://www.irf.com/technical-info/appnotes/an-1088.pdf
            PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

              Comment

              • adamp91gvm
                Badcaps Veteran
                • Jan 2014
                • 706
                • uk
                #64
                Re: L.G. 42PC1D, dark flickering pic.

                I have found vy one this one side I have -193 and the other 0v
                Attached Files
                Last edited by adamp91gvm; 02-17-2014, 01:25 PM.

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK
                    #65
                    Re: L.G. 42PC1D, dark flickering pic.

                    Originally posted by Alastair E
                    Ah--yes, Think its reffed to -Vy, next time the sets in bits--I'll take a look! Still working well at the mo, Given my 50PZ80 a sabatical, need to find why the grey-scale has gone a bit pink on it!
                    (It was too big for the room anyway!)
                    Unrelated but 50PZ80: if red or pink tint, check LVDS cable is fully seated. My cheap 46PZ80 from eBay with love was fixed that way
                    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

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK
                        #66
                        Re: L.G. 42PC1D, dark flickering pic.

                        Originally posted by adamp91gvm
                        I have found vy one this one side I have -193 and the other 0v
                        Yep so that seems OK now see if you can find Vsc around 120 to 150V IIRC on these panels.
                        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

                          • adamp91gvm
                            Badcaps Veteran
                            • Jan 2014
                            • 706
                            • uk
                            #67
                            Re: L.G. 42PC1D, dark flickering pic.

                            Vsc on one side is show in from 3.86v to ov up and down

                              Comment

                              • adamp91gvm
                                Badcaps Veteran
                                • Jan 2014
                                • 706
                                • uk
                                #68
                                Re: L.G. 42PC1D, dark flickering pic.

                                Here ?
                                Attached Files

                                  Comment

                                  • Alastair E
                                    Chief Womble
                                    • Mar 2013
                                    • 1963
                                    • U.K.
                                    #69
                                    Re: L.G. 42PC1D, dark flickering pic.

                                    Thats it--Measure across that red film-cap.....

                                    BTW--Adam--If you decide to scrap that 42PC1DA, I'll buy the faulty boards off you to do some more experiments on the IPM's--Or if you replace the boards I'll buy your old faulty ones--so long as they aint too much!.....
                                    --I dont want to mess too much with my set as-is, because its working well.....
                                    TELEFIX

                                    How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                                    http://www.irf.com/technical-info/appnotes/an-1088.pdf
                                    PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                                      Comment

                                      • adamp91gvm
                                        Badcaps Veteran
                                        • Jan 2014
                                        • 706
                                        • uk
                                        #70
                                        Re: L.G. 42PC1D, dark flickering pic.

                                        I have its above

                                          Comment

                                          • tom66
                                            EVs Rule
                                            • Apr 2011
                                            • 32560
                                            • UK
                                            #71
                                            Re: L.G. 42PC1D, dark flickering pic.

                                            OK now pull buffers out, does Vsc return or is it still bad?
                                            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

                                              • adamp91gvm
                                                Badcaps Veteran
                                                • Jan 2014
                                                • 706
                                                • uk
                                                #72
                                                Re: L.G. 42PC1D, dark flickering pic.

                                                Yer its the same

                                                  Comment

                                                  • tom66
                                                    EVs Rule
                                                    • Apr 2011
                                                    • 32560
                                                    • UK
                                                    #73
                                                    Re: L.G. 42PC1D, dark flickering pic.

                                                    Bad Y-sustain - Vsc low then.
                                                    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

                                                      • adamp91gvm
                                                        Badcaps Veteran
                                                        • Jan 2014
                                                        • 706
                                                        • uk
                                                        #74
                                                        Re: L.G. 42PC1D, dark flickering pic.

                                                        Is it fixable or get a new one?

                                                          Comment

                                                          • tom66
                                                            EVs Rule
                                                            • Apr 2011
                                                            • 32560
                                                            • UK
                                                            #75
                                                            Re: L.G. 42PC1D, dark flickering pic.

                                                            I'd say it's one of those DC DC packs which you might be able to nick off a bad 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

                                                              • adamp91gvm
                                                                Badcaps Veteran
                                                                • Jan 2014
                                                                • 706
                                                                • uk
                                                                #76
                                                                Re: L.G. 42PC1D, dark flickering pic.

                                                                One of the red packs ?

                                                                  Comment

                                                                  • tom66
                                                                    EVs Rule
                                                                    • Apr 2011
                                                                    • 32560
                                                                    • UK
                                                                    #77
                                                                    Re: L.G. 42PC1D, dark flickering pic.

                                                                    No... the little PCBs that have a transformer on them, one for -Vy one for Vsc
                                                                    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

                                                                      • adamp91gvm
                                                                        Badcaps Veteran
                                                                        • Jan 2014
                                                                        • 706
                                                                        • uk
                                                                        #78
                                                                        Re: L.G. 42PC1D, dark flickering pic.

                                                                        Ahh the ones that are vertical off the board

                                                                          Comment

                                                                          • tom66
                                                                            EVs Rule
                                                                            • Apr 2011
                                                                            • 32560
                                                                            • UK
                                                                            #79
                                                                            Re: L.G. 42PC1D, dark flickering pic.

                                                                            Yes. I don't think they're interchangeable unfortunately, you would need to find a Vsc pack for Vsc replacement.
                                                                            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

                                                                              • adamp91gvm
                                                                                Badcaps Veteran
                                                                                • Jan 2014
                                                                                • 706
                                                                                • uk
                                                                                #80
                                                                                Re: L.G. 42PC1D, dark flickering pic.

                                                                                Is it on the board what one is for what ?

                                                                                  Comment

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