Sanyo dp42848. No picture no sound?has anyone found the problem

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  • tomstr
    Tommy
    • Jun 2010
    • 147
    • Usa

    #141
    Re: Sanyo dp42848. No picture no sound?has anyone found the problem

    Originally posted by johnboy1313
    To the original poster. At this point, it may be time to pull back and rethink things. I recently got a little over anxious and turned a few dollar fix into a 50 dollar fix all because I wanted to get out of my comfort zone without taking time to research. You may be better off storing this thing and keeping an eye on Craigslist for the same tv with a cracked panel for cheap. That way, you will have all of the boards to swap out one at a time until it is working. At that point, you may be able to recover some of your investment parting out what is left. Good luck.
    Thanks for the comment,you are right step back is what i need to do.craigslist is were i got this tv,free so i love fixing things,i want to know what is causing the problem.
    Last edited by tomstr; 12-01-2012, 08:20 AM.

    Comment

    • tomstr
      Tommy
      • Jun 2010
      • 147
      • Usa

      #142
      Re: Sanyo dp42848. No picture no sound?has anyone found the problem

      Originally posted by drpj23
      You need a 24V, 8-10A power supply... if you have one, then provide 24V and connect INV-ON to 5VDC and DIM to 5VDC. [per TOM66]

      I guess your friend didn't say anything new?

      If you want to test your meter you have a reference with your powersupply for 24v.....at least human error is almost completely ruled out that way.
      Am i measuring a/c volts or d/c volts for my 24 volt voltage?i have been setting my meter to d/c

      Comment

      • tomstr
        Tommy
        • Jun 2010
        • 147
        • Usa

        #143
        Re: Sanyo dp42848. No picture no sound?has anyone found the problem

        Originally posted by tomstr
        Am i measuring a/c volts or d/c volts for my 24 volt voltage?i have been setting my meter to d/c
        . Left upper on meter d/c v
        Attached Files

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #144
          Re: Sanyo dp42848. No picture no sound?has anyone found the problem

          Wrong setting!!! Set to DC200V (the dashed and solid line.)
          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

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #145
            Re: Sanyo dp42848. No picture no sound?has anyone found the problem

            No wonder why we are not getting correct reading.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • tomstr
              Tommy
              • Jun 2010
              • 147
              • Usa

              #146
              Re: Sanyo dp42848. No picture no sound?has anyone found the problem

              The picture of the meter shows ohms thats not were i set it too this picture of the meter is a stock picture of my meter,the setting when testing WAS SET TO D/C 200. So i was reading the meter correctly!so i will check the volts and send a pic of the meter with the setting before i start testing again..

              Comment

              • tomstr
                Tommy
                • Jun 2010
                • 147
                • Usa

                #147
                Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                Ok I'm ready do you want me to take the board out and start from square 1.i have the pics of the marked circuits?AND WHAT DO YOU WANT MY METER SET TO?

                Comment

                • tomstr
                  Tommy
                  • Jun 2010
                  • 147
                  • Usa

                  #148
                  Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                  Hello!!

                  Comment

                  • tomstr
                    Tommy
                    • Jun 2010
                    • 147
                    • Usa

                    #149
                    Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                    Originally posted by tom66
                    Wrong setting!!! Set to DC200V (the dashed and solid line.)
                    Can anyone help me today. Sunday?just thought i whould ask if not my day off is tuesday

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #150
                      Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                      I am really completely lost now.

                      Do you or do you not have 24V?
                      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

                      • tomstr
                        Tommy
                        • Jun 2010
                        • 147
                        • Usa

                        #151
                        Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                        No I have tried every meter setting no 24 volts should I start from step 1 or?

                        Comment

                        • tomstr
                          Tommy
                          • Jun 2010
                          • 147
                          • Usa

                          #152
                          Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                          Here is my meter setting
                          Attached Files

                          Comment

                          • tomstr
                            Tommy
                            • Jun 2010
                            • 147
                            • Usa

                            #153
                            Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                            I back probe the the wires while there plugged in,turn on the tv and 0 volts at 24v side of plug.

                            Comment

                            • tomstr
                              Tommy
                              • Jun 2010
                              • 147
                              • Usa

                              #154
                              Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                              This is a pic of how i test

                              Comment

                              • tomstr
                                Tommy
                                • Jun 2010
                                • 147
                                • Usa

                                #155
                                Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                Meter
                                Attached Files

                                Comment

                                • tomstr
                                  Tommy
                                  • Jun 2010
                                  • 147
                                  • Usa

                                  #156
                                  Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                  Another pic

                                  Comment

                                  • tomstr
                                    Tommy
                                    • Jun 2010
                                    • 147
                                    • Usa

                                    #157
                                    Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                    Here is the meter results
                                    Attached Files
                                    Last edited by tomstr; 12-02-2012, 10:53 AM.

                                    Comment

                                    • selldoor
                                      Slow Learner
                                      • Dec 2010
                                      • 7870

                                      #158
                                      Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                      Your attachments are failing?
                                      Not often Tom gets in a twist.
                                      ok fresh start - check meter ohms 200 touch probes
                                      reading +?

                                      tv connected and all set up powered on
                                      meter on 200vdc black probe on ground screw in corner of power board where it says made in china and the socket CN2
                                      With the red probe test each pin and list the results in a column:
                                      pson =
                                      sgnd =
                                      sgnd =
                                      +5vsb = and so on.

                                      Answer the next part in a new reply post.

                                      Did you test the "Pink" fusible resistors for continuity
                                      Meter on Ohms 200 probe on each end.

                                      Answer the next part in a new reply post.

                                      Did you read the link in post24 problem was very similar and it was on a sanyo
                                      It will show you that even if the fault IS known it cannot Always be fixed - I think in that case the OP cut that bit of the circuit out and used something else.

                                      Also do not refer to a component as a circuit if you do not know what it is ask and/or refer to it as a component. Otherwise it is quite confusing.
                                      Please upload pictures using attachment function when ask for help on the repair
                                      http://www.badcaps.net/forum/showthread.php?t=39740

                                      Comment

                                      • tomstr
                                        Tommy
                                        • Jun 2010
                                        • 147
                                        • Usa

                                        #159
                                        Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                        Ok step 1

                                        Comment

                                        • tomstr
                                          Tommy
                                          • Jun 2010
                                          • 147
                                          • Usa

                                          #160
                                          Re: Sanyo dp42848. No picture no sound?has anyone found the problem

                                          Here is the first step
                                          Attached Files

                                          Comment

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