Slightly Different Vestel 17PW26-4 Problem

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  • Techstar
    Tv Restoration
    • Dec 2012
    • 122
    • United Kingdom.

    #21
    Re: Slightly Different Vestel 17PW26-4 Problem

    I know i tested the backlights to see if they all work but how can i prove a tube is not pulling too much current , do you know of any way to test a tube this way any one. A tube that pulls too much current can cause shut down.

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #22
      Re: Slightly Different Vestel 17PW26-4 Problem

      You can use an old CFL/energy saving lamp as an inverter tester, see here:
      https://www.badcaps.net/forum/showthread.php?t=19987
      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

      • Techstar
        Tv Restoration
        • Dec 2012
        • 122
        • United Kingdom.

        #23
        Re: Slightly Different Vestel 17PW26-4 Problem

        What do you think about this idea , i remove the connector on the suspect lamp that connects to the inverter, i then solder to the board where the connector goes 2 wires and solder these to
        a lamp out of a scrap tv. Just a simple substitution test. Only 6 tubes in this tv so i might try it.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #24
          Re: Slightly Different Vestel 17PW26-4 Problem

          That would work too.
          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

          • Techstar
            Tv Restoration
            • Dec 2012
            • 122
            • United Kingdom.

            #25
            Re: Slightly Different Vestel 17PW26-4 Problem

            Originally posted by vinceroger69
            not sure at all 20-30 seconds is a long time just saw this on another forum whilst on google looking at another sharp fault worth checking though and the lamp error reset is a good tip i never heard of that before.tom or budm may have more ideas to what the fault could be.
            Could you give me a link to this forum you mention please please vince. I would like to read what they say about it , i don't think the inverter board on this tv here is the same though but i would be interested to read about it.

            Comment

            • vinceroger69
              Badcaps Legend
              • Mar 2012
              • 6714
              • uk

              #26
              Re: Slightly Different Vestel 17PW26-4 Problem

              its on here somewhere i was reading various threads lol
              http://www.tv.quuq.org/index.php

              Comment

              • vinceroger69
                Badcaps Legend
                • Mar 2012
                • 6714
                • uk

                #27
                Re: Slightly Different Vestel 17PW26-4 Problem

                Originally posted by vinceroger69
                its on here somewhere i was reading various threads lol
                http://www.tv.quuq.org/index.php
                may of also been this forum


                http://www.highlandelectrix.fsnet.co.uk/myweb/tvs.html

                Comment

                • Techstar
                  Tv Restoration
                  • Dec 2012
                  • 122
                  • United Kingdom.

                  #28
                  Re: Slightly Different Vestel 17PW26-4 Problem

                  Some thing crossed my mind about trying to use some kind of dummy load in place of a tube. For testing purposes of course. What about putting a high voltage high wattage resistor in place of the tube . I still suspect a possible inverter or tube probem with this annoyance of a set.
                  It ran for 5 minutes today , i thought my re flowing of joints on the inverter board had cured it but sure enough it started going back to standby again. Only last a few seconds again after the initial good 5 minute run. Got 3 electrolytics on the main board to test tomorrow and going to test the SM caps on the main board. A main board will be best part of £45 so have to keep testing. I will be testing voltages on the main board too, might just be a regulator or a bad joint or connection if i am lucky. I tried heating components with the hair dryer and cooling with freezer , but nothing seems temperature sensitive . Update :-

                  I Just found a replacement main board for £20.
                  Last edited by Techstar; 01-20-2013, 02:14 PM.

                  Comment

                  • jimmy007
                    New Member
                    • Feb 2019
                    • 1
                    • Ελλάδα

                    #29
                    Re: Slightly Different Vestel 17PW26-4 Problem

                    Hi guys, i have problem with a 32'' tv Schaub Lorenz. LT32-354AB
                    Ι have the usual problem with flashes stand by led and the tv won't turn on.
                    So i want to check firstly the power supply (17pw26-4)
                    I measure the 3.3v and 5v voltages but no 12v and 24v.
                    I try to connect the 5v voltage (pin 14) with the BL ON OFF(pin 8) but again it won't turn on and i haven't voltages 12,24.
                    How can turn on only the power supply to check it?

                    Comment

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