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Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

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    Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

    Evening all .....

    Joining the ranks of those shouting help .....

    Vestel PSU 17PW07-2 021111 / Laurus TV or TOSHIBA 40BL702B Board, 5 red blinking lights, screen on, screen off and cycles back.

    Problem with the PSU .... but which offending little items are they ? And .... can they be gotten from Maplins ...... !!

    All and Any Suggestions Welcome

    Picture of the Offending Item ....

    Last edited by igundwane; 05-11-2013, 12:43 PM.

    #2
    Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

    Hah, crappy rebadged Toshiba.
    Sure about 17PW20-2? That looks like a PW80 or thin LED supply to me.
    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


      #3
      Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

      Well .... for £50 I thought I would take a punt on it ...... LED 42"

      Nope, that is what it says on the Board

      Comment


        #4
        Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

        Looks like 17PW07-2 to me.
        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


          #5
          Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

          Honest Dude, its got the twin silver heat sinks in it ....

          And yes ... Me Wrong - You Right

          It is the 17PW07-2 021111

          Comment


            #6
            Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

            Well, I know 17PW20.2 for all the wrong reasons. Absolutely one of the worst PSUs out there. So. Many. Problems.
            Can we have a picture of the overall chassis layout? (it doesn't matter if PSU is missing for now.)
            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


              #7
              Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

              Comment


                #8
                Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                Schematic (the one without a dot prefix)
                http://www.tgohome.com/ServiceManual...&Search=Submit

                Check for 24V on connector PL306.
                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


                  #9
                  Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                  I shall do ... thank you for that, potential root of all evil ?

                  Comment


                    #10
                    Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                    If the backlight flickers/blinks on or off we need to check if the 24V is unstable, if it is then PSON needs to be checked, if PSON is unstable it is a main board fault; if PSON is stable it is a power board fault; if both are stable then BLON is checked; if BLON is stable it is an LED driver fault; if BLON is unstable it is a main board fault.

                    Simples.
                    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


                      #11
                      Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                      Aaah, well the screen lights up with a solid blue, no flickering or wavering.
                      Last edited by igundwane; 05-11-2013, 02:29 PM.

                      Comment


                        #12
                        Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                        Thought you said screen came on then off; I interpreted this as it lighting up then going off?
                        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


                          #13
                          Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                          OK maybe crossed wires here, Once it goes past the 5th red blink, the screen turns on albeit for 20secs, shows a solid blue color all over, no wavers, squiggles, lines etc ... then it turns off, very soft click then the red light starts to blink again.

                          Is that a better description ? ....

                          Comment


                            #14
                            Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                            OK, so please check the 24V then, it sounds like a PSU or main board fault.
                            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


                              #15
                              Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                              OK dude, you are going to go " grrrrr " now, I cannot find a PL306 ...... Been searching, and not a thing ...

                              Looking at the photo of chassis, is it :

                              a: top left small board
                              b: right board with the HDMI ports on it
                              c: main PSU board
                              d: small board bottom centre

                              Comment


                                #16
                                Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                                Main PSU, connector going to LED driver (top left small 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


                                  #17
                                  Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                                  Sorry Tom, Sleep over came last night ...

                                  However, digging around this morning, Sharp which uses a similar board has come up with this ... Any help ?

                                  In the meantime i will go and try and find my volt meter which is buried somewhere in the house

                                  Comment


                                    #18
                                    Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                                    Could be useful -- I think that is on the main 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


                                      #19
                                      Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                                      Futher to the previous, might be worth replacing the 4 x elite 1000uf 16v Caps as it seems from more reading, they may be the cause, trip to maplins

                                      Comment


                                        #20
                                        Re: Vestel PSU 17PW20-2 / Laurus TV or TOSHIBA 40BL702B

                                        DO NOT use capacitors from Maplins, they are NOT suitable and in fact are worse than the original Elite in most cases.
                                        Don't know where you live but Farnell, who sell low-esr reliable Panasonic and Rubycon, are about 5 mins drive from me.
                                        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

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