Sanyo DP42849 - No Power At All

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #81
    Re: Sanyo DP42849 - No Power At All

    Check resistance across C603, near D902.
    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

    • multimeter
      Badcaps Veteran
      • Jan 2011
      • 739
      • united kingdom

      #82
      Re: Sanyo DP42849 - No Power At All

      Originally posted by NihonNoir
      D951 is the one that gave me the low reading for such a big diode (compared to the others), and I've seen that particular diode go bad in other DP42849s, too.

      D901 - 515
      D951 - 209
      d951 maybee a shottky diode,big difference,they have readings both ways but not shorted readings,test it out of circuit,these tend to go short,

      i repaired a tv just recently with a shottky diode,weirdly it tested good in circuit,i removed it and it tested short
      fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

      ----------------------------------------------
      please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

      Comment

      • NihonNoir
        Badcaps Veteran
        • Jan 2014
        • 231
        • US

        #83
        Re: Sanyo DP42849 - No Power At All

        Okay - which setting should I put my meter on to test C603? I have 200 Ohm to 20M.

        I'll see if I can get that D951 out.

        Comment

        • multimeter
          Badcaps Veteran
          • Jan 2011
          • 739
          • united kingdom

          #84
          Re: Sanyo DP42849 - No Power At All

          Originally posted by NihonNoir
          Okay - which setting should I put my meter on to test C603? I have 200 Ohm to 20M.

          I'll see if I can get that D951 out.
          200 ohm scale
          fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

          ----------------------------------------------
          please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

          Comment

          • NihonNoir
            Badcaps Veteran
            • Jan 2014
            • 231
            • US

            #85
            Re: Sanyo DP42849 - No Power At All

            Originally posted by multimeter
            200 ohm scale
            It's staying at "1". I tested C902 to make sure I was doing it right, and I got 15.7. Then I test other capacitors with the little "ZZZ" in the middle, and some of them I get readings, and some of them I get "1".

            Okay no - I got my polarity confused even though I tried to pay attention to the + signs. Let me do it again.
            Last edited by NihonNoir; 01-22-2014, 12:36 PM.

            Comment

            • NihonNoir
              Badcaps Veteran
              • Jan 2014
              • 231
              • US

              #86
              Re: Sanyo DP42849 - No Power At All

              Okay I was right - I get a "1" on C603 and 15.7 on C902.

              I accidentally reversed polarity on some of the caps in the array near the PS pins and got confused.
              Last edited by NihonNoir; 01-22-2014, 12:42 PM.

              Comment

              • multimeter
                Badcaps Veteran
                • Jan 2011
                • 739
                • united kingdom

                #87
                Re: Sanyo DP42849 - No Power At All

                Originally posted by NihonNoir
                Okay I was right - I get a "1" on C603 and 15.7 on C902.
                does your meter reading rise then drop off on that c603? c902 sounds suspect
                fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                ----------------------------------------------
                please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                Comment

                • multimeter
                  Badcaps Veteran
                  • Jan 2011
                  • 739
                  • united kingdom

                  #88
                  Re: Sanyo DP42849 - No Power At All

                  if you have hair drier,can you just heat those caps up for a minute,and power the tv up?and also the group of caps next to the connector with standby voltages etc,power tv up as if you want to watch it
                  fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                  ----------------------------------------------
                  please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                  Comment

                  • NihonNoir
                    Badcaps Veteran
                    • Jan 2014
                    • 231
                    • US

                    #89
                    Re: Sanyo DP42849 - No Power At All

                    Originally posted by multimeter
                    does your meter reading rise then drop off on that c603? c902 sounds suspect
                    Nothing at all on that C603. Stays at "1". Let me triple check.

                    Okay I was right in the first place - I get readings on some of them in the array, and some of them just stay at "1". Let me redo them all and write down what I get.
                    Last edited by NihonNoir; 01-22-2014, 12:55 PM.

                    Comment

                    • multimeter
                      Badcaps Veteran
                      • Jan 2011
                      • 739
                      • united kingdom

                      #90
                      Re: Sanyo DP42849 - No Power At All

                      Originally posted by NihonNoir
                      Nothing at all on that C603. Stays at "1". Let me triple check.

                      Okay I was right in the first place - I get readings on some of them in the array, and some of them just stay at "1". Let me redo them all and write down what I get.
                      check both ways,on c603 it could be open,the battery power in your meter should cause the cap to rise a little and drop back to "1",simular to a flick test with an analogue meter
                      fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                      ----------------------------------------------
                      please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                      Comment

                      • NihonNoir
                        Badcaps Veteran
                        • Jan 2014
                        • 231
                        • US

                        #91
                        Re: Sanyo DP42849 - No Power At All

                        C133 - 156.6
                        C123B - 156.6
                        C123A - 156.6/7
                        C123 - "1"
                        C122C - "1"
                        C122B - "1"
                        C122A - "1"

                        C952 - 15.7
                        C603 - "1"

                        C952 - "1"
                        C951 - "1"

                        I double checked that I put the red lead on the positive solder point.

                        Comment

                        • NihonNoir
                          Badcaps Veteran
                          • Jan 2014
                          • 231
                          • US

                          #92
                          Re: Sanyo DP42849 - No Power At All

                          Originally posted by multimeter
                          check both ways,on c603 it could be open,the battery power in your meter should cause the cap to rise a little and drop back to "1",simular to a flick test with an analogue meter
                          "1" both ways. Reading never changes.

                          Comment

                          • multimeter
                            Badcaps Veteran
                            • Jan 2011
                            • 739
                            • united kingdom

                            #93
                            Re: Sanyo DP42849 - No Power At All

                            Originally posted by NihonNoir
                            "1" both ways. Reading never changes.
                            ok,try heating the caps up with a hair drier,on high for around a minute,then try powering up the tv
                            fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                            ----------------------------------------------
                            please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                            Comment

                            • NihonNoir
                              Badcaps Veteran
                              • Jan 2014
                              • 231
                              • US

                              #94
                              Re: Sanyo DP42849 - No Power At All

                              Originally posted by multimeter
                              ok,try heating the caps up with a hair drier,on high for around a minute,then try powering up the tv
                              Gotta run my mom to her doctor, so I'll do that when I get back.

                              Reinstall board, heat caps, plug TV in and press power?

                              About how many minutes should I heat them? I don't wanna ruin anything.

                              Thank you!

                              Sorry - read your message too fast. About a minute. Got it.

                              Comment

                              • NihonNoir
                                Badcaps Veteran
                                • Jan 2014
                                • 231
                                • US

                                #95
                                Re: Sanyo DP42849 - No Power At All

                                Oh, I should resolder that diode I pulled out, right? Or can I just stick it back in the hole?

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK

                                  #96
                                  Re: Sanyo DP42849 - No Power At All

                                  You should solder it back in place.
                                  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

                                  • NihonNoir
                                    Badcaps Veteran
                                    • Jan 2014
                                    • 231
                                    • US

                                    #97
                                    Re: Sanyo DP42849 - No Power At All

                                    Nothing

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #98
                                      Re: Sanyo DP42849 - No Power At All

                                      What's the part # of IC901?
                                      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

                                      • NihonNoir
                                        Badcaps Veteran
                                        • Jan 2014
                                        • 231
                                        • US

                                        #99
                                        Re: Sanyo DP42849 - No Power At All

                                        Originally posted by tom66
                                        what's the part # of ic901?
                                        a6069h sk803 23bp

                                        Comment

                                        • tom66
                                          EVs Rule
                                          • Apr 2011
                                          • 32560
                                          • UK

                                          #100
                                          Re: Sanyo DP42849 - No Power At All

                                          Measure volts DC from pin 5 to pin 3. What do you get?

                                          http://www.allegromicro.com/~/media/...Datasheet.ashx

                                          Should be around 15V to 30V.
                                          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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