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    #1

    Sanyo DP42849

    I have a sanyo DP42849 that a friend gave me, he said that it just quit working when he went to turn it on one morning nothing happened. When i plugged it in i got no lights not even a standby or power light. When i took of the back cover i found a bad IC (will post pictures) on the power supply board. There is no other damage or bad caps that i can see. I have searched and looked through service manuals but none of them show this IC. Does any one know what IC i need and where i can order a new one. From the pictures do you think there is more damage and should replace the whole power supply board. I thought if i could just replace the IC that would be the way to go.
    Thanks any help is greatly appreciated.
    Attached Files
    Last edited by fxdfireman; 03-31-2013, 09:35 AM.
    Tags: None
    #2
    Re: Sanyo DP42849

    Cant find a schematic. Found this high res image of the board.

    http://assets.shopjimmy.com/media/ca...20c41500_1.jpg

    Somebody might be able to recognise it from the high res image. It's the PWM chip by the look of it... If this chip is blown you'd also want to check the three pin FET just below it on that image... it's labelled Q601, it could also be shorted. Also B01 the main bridge rectifier.. Maybe check the main transformer as well. The fuse may be blown as well.. To be 100% sure you'd need to check all the components, but if you're playing the odds they are the ones I would check first..

    Comment

      #3
      Re: Sanyo DP42849

      I checked the fuse that was good. I will check over the other ones you suggest today and see what i find.
      Thanks for the help!

      Comment

        #4
        Re: Sanyo DP42849

        Does anybody know what part i need to order to replace the blown one. I looked at the picture but i can't tell.

        Comment

          #5
          Re: Sanyo DP42849

          I can't either... you could consider asking ShopJimmy as they may be nice and tell you what part it is.
          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

            #6
            Re: Sanyo DP42849

            We have had a few of these recently - main problem was the transformer which is a proprietary part - I have sent a PM to th emost recent poster and asked if he still has his board and what is IC901
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

              #7
              Re: Sanyo DP42849

              My eyes are not great but it looks either A6062H or A6069H. Maybe the specsheet will give a clue on it's ratings. I'm thinking the last digit looks more like a 9, maybe someone with eagle eyes can pick it.
              Attached Files
              Last edited by tw2005; 03-31-2013, 05:25 PM.

              Comment

                #8
                Re: Sanyo DP42849

                Hi - I had come to a similar conclusion yesterday but eyes were going so gave up.
                Anyway with your input and fresh eyes I have found an exact match

                http://img04.taobaocdn.com/bao/uploa...pg_310x310.jpg

                fxdfireman if you updated your profile with country we could help source one

                http://www.digikey.com/product-detai...art_dkc_buynow
                Last edited by selldoor; 04-01-2013, 06:02 AM.
                Please upload pictures using attachment function when ask for help on the repair
                http://www.badcaps.net/forum/showthread.php?t=39740

                Comment

                  #9
                  Re: Sanyo DP42849

                  Wow! You guys have good eyes, i still can't see it.

                  Thanks for the help, I should be fine ordering one through digikey. I will get one and try it and see what happens.

                  Comment

                    #10
                    Re: Sanyo DP42849

                    I would also check the other components as mentioned previously otherwise
                    it could just blow again.
                    Please upload pictures using attachment function when ask for help on the repair
                    http://www.badcaps.net/forum/showthread.php?t=39740

                    Comment

                      #11
                      Re: Sanyo DP42849

                      I was going to check everything out as suggested, and i might order two just in case. I like learning how to troubleshoot componets rather than just replacing boards.

                      Comment

                        #12
                        Re: Sanyo DP42849

                        Good work lads, I was sure the bottom was 23AP, but I thought the second line was ST803... I even tried a few filters on Photoshop and it couldnt make it any clearer..

                        Comment

                          #13
                          Re: Sanyo DP42849

                          Originally posted by fxdfireman View Post
                          Wow! You guys have good eyes, i still can't see it.

                          Thanks for the help, I should be fine ordering one through digikey. I will get one and try it and see what happens.
                          Ah, no. I just find I'm getting plenty of practice decyphering blurred images these days. Most things that size seem blurry to me when I have them right in front of me.

                          Comment

                            #14
                            Re: Sanyo DP42849

                            So i took out the power supply and was going to install the new part when i looked on the backside and noticed another bad IC, IC601 (will post picture) Does anybody know what this one is? is it worth trying seeing i already have the other one, or should i just admit defeat and order a new board.
                            Attached Files

                            Comment

                              #15
                              Re: Sanyo DP42849

                              Can you try and clean it with isopropyl alcohol - can you read any numbers on it?
                              Please upload pictures using attachment function when ask for help on the repair
                              http://www.badcaps.net/forum/showthread.php?t=39740

                              Comment

                                #16
                                Re: Sanyo DP42849

                                I couldn't see any numbers on it. I look in the service manual but they don't show the power supply. I can try cleaninng it when i get home from work.

                                Comment

                                  #17
                                  Re: Sanyo DP42849

                                  Looks like R606 is bad too, so the FET it is attached to probably failed short.
                                  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

                                    #18
                                    Re: Sanyo DP42849

                                    I got the same problem As FXDFIREMAN with "IC901" - i have not pulled the board out yet to see if there are more problems on the bottom

                                    Video- http://www.youtube.com/watch?v=K23owtg6TV0

                                    1. How did FXDFIREMAN make out

                                    Comment

                                      #19
                                      Re: Sanyo DP42849

                                      I found other problems on mine and ended up just changing the power supply board. TV works good now.

                                      Comment

                                        #20
                                        Re: Sanyo DP42849

                                        Hey FXDFIREMAN -- after reading all the post, I remove my board and found the same damaged ic601 on the bottom as well as the ic901 on the top... I guess I will follow your lead.. Do you rememeber were you purchased you new board???? the major referral company is out of STOCK.....THANKS

                                        Comment

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