Panasonic TX-P42S10B

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  • noledud
    Badcaps Veteran
    • Dec 2013
    • 413
    • united kingdom

    #1

    Panasonic TX-P42S10B

    Panasonic TX-P42S10B

    Hi All been away a while waiting for parts and getting side tracked, found this Panasonic nearby and never having one for repair wanted to give it a go

    7 Blinks wont power on

    The seller was using daily until sometimes is was hard to turn on sometimes

    he told me this went on for a while all he did was unplug it then try again

    until recently it wont come on at all

    so i checked it and looked untouched and clean and screen good. He had bought a new one and just wanted rid

    I paid more than i would have liked then took it home

    the pics say it all for my first panasonic -- WTF
    Attached Files
  • Agent24
    I see dead caps
    • Oct 2007
    • 4914
    • New Zealand

    #2
    Re: Panasonic TX-P42S10B

    Often a power-on problem that gets slowly worse is bad capacitors.

    But what interests me are the burn marks on the heatsink!
    "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
    -David VanHorn

    Comment

    • noledud
      Badcaps Veteran
      • Dec 2013
      • 413
      • united kingdom

      #3
      Re: Panasonic TX-P42S10B

      im more worried about the missings FETs missing from the y-main lol

      Comment

      • noledud
        Badcaps Veteran
        • Dec 2013
        • 413
        • united kingdom

        #4
        Re: Panasonic TX-P42S10B

        i think the person i bought it off forgot to say "hes tried repairing it but couldn't so then sold it"

        Comment

        • Agent24
          I see dead caps
          • Oct 2007
          • 4914
          • New Zealand

          #5
          Re: Panasonic TX-P42S10B

          Only looked at thumbnails, didn't notice those missing FETs! Hopefully those were the bad ones (That he probably blew out from whatever mistake caused the heatsink to get burnt)
          "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
          -David VanHorn

          Comment

          • tw2005
            Badcaps Legend
            • Oct 2011
            • 6458
            • Australia

            #6
            Re: Panasonic TX-P42S10B

            I think SC failure is fairly common in these. there are a couple of Ebay repairers of the board and some here have done that since these are pretty much impossible to find.

            not sure how you'll go now with the SC messed with as most repairers will not attempt a repair. i'd try and find out what exactly the previous person had done.

            It may just be that the shorted IGBts have been removed but if they've tried replacing them and powered it up, other damage may have occurred.

            they probably bailed out on cost. I think fro memory a Sc repair is about $130 plus you should resistance check the SD/SU as well just in case.

            Comment

            • noledud
              Badcaps Veteran
              • Dec 2013
              • 413
              • united kingdom

              #7
              Re: Panasonic TX-P42S10B

              exactly what i thought this is a can of worms

              Comment

              • tw2005
                Badcaps Legend
                • Oct 2011
                • 6458
                • Australia

                #8
                Re: Panasonic TX-P42S10B

                So you need TNPA4829AD or TXNSC1EKUU.

                Inside the rear cover are there corresponding burn marks for what we see on the PSU?

                You may want to check fuses and FETs on that PSU and see if he's blown it.

                It may be possible to power this set up to confirm PSU and A board but will require isolating all the other boards.

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia

                  #9
                  Re: Panasonic TX-P42S10B

                  Is 43quid a lot of money in your speak?

                  Comment

                  • noledud
                    Badcaps Veteran
                    • Dec 2013
                    • 413
                    • united kingdom

                    #10
                    Re: Panasonic TX-P42S10B

                    It is a TNPA4829AD

                    there are no marks on the rear cover at all

                    its not alot no, so can i narrow it down you think ?

                    Comment

                    • tw2005
                      Badcaps Legend
                      • Oct 2011
                      • 6458
                      • Australia

                      #11
                      Re: Panasonic TX-P42S10B

                      Originally posted by noledud
                      It is a TNPA4829AD

                      there are no marks on the rear cover at all

                      its not alot no, so can i narrow it down you think ?
                      should I'm just trying to upload manuals now.

                      have you tried turning this on yet as is not that I want you too?

                      Comment

                      • noledud
                        Badcaps Veteran
                        • Dec 2013
                        • 413
                        • united kingdom

                        #12
                        Re: Panasonic TX-P42S10B

                        the seller powered it on for me lol

                        Comment

                        • tw2005
                          Badcaps Legend
                          • Oct 2011
                          • 6458
                          • Australia

                          #13
                          Re: Panasonic TX-P42S10B

                          might be quicker if you go to TOM's links in the reference library. Nothing but trouble last 2 days with uploads.

                          looking for 2009_PDP_Troubleshooting_Handbook_TTG090507CP-REV091117

                          not sure if he renames them.

                          If you think the PSU is ok, disconnect 3 white ribbons at the A board , P35, SC2, SS11 and power up and confirm if it starts ok and stays on. This will confirm PSu and A.

                          then I'd resistance check the SD/SU boards.

                          Comment

                          • tw2005
                            Badcaps Legend
                            • Oct 2011
                            • 6458
                            • Australia

                            #14
                            Re: Panasonic TX-P42S10B

                            Originally posted by noledud
                            the seller powered it on for me lol
                            That was nice of him, clearly he knew what he was doing(not)

                            Well, I guess that confirms there's hope.

                            If you disconnect all of what I posted hopefully it will just turn on.

                            I'd expect SOS7 with a Sc in that condition.

                            Comment

                            • tw2005
                              Badcaps Legend
                              • Oct 2011
                              • 6458
                              • Australia

                              #15
                              Re: Panasonic TX-P42S10B

                              Finally,

                              Slide 25 on, resistance check SD/SU,

                              Slide 27, boards disconnected from the SC, all the instructions are there.

                              note: Unplug connector SU41 and SU11(interconnecting ribbon SU/SD. Remove the 2 floating ground screws from the SU board

                              If they come up good you might get out of it for 43quid.
                              Attached Files
                              Last edited by tw2005; 03-22-2014, 05:12 PM.

                              Comment

                              • tw2005
                                Badcaps Legend
                                • Oct 2011
                                • 6458
                                • Australia

                                #16
                                Re: Panasonic TX-P42S10B

                                This post may be of interest. MSAUDIO replaced just the blown IGBTs and a diode (Q402, Q421, Q422, Q661 & D865 ) and got one going which is pretty lucky and cool.

                                https://www.badcaps.net/forum/showth...ght=TX-P42S10B

                                Are these all that are missing? D622,Q401,Q402,Q421,Q422,Q661. Be interesting to check D865 next to Q622 and see if short cct.

                                Any chance you can check to see if the guy has the pulled parts, some may not have been bad, like D622 or Q401 /402. Could be handy in case D622 is hard to find and you want to have a gamble fixing this.

                                Actually TN245 got his going, reported replacing same and fixed his too.

                                Originally posted by masaudio
                                I have one of these boards in, and your parts list is a great help as we can order direct from Panasonic, glad someone out there can get onto the manuals..

                                We have the board with Q402, Q421, Q422, Q661 & D865 all shorted, disconnecting them has removed all shorts from the board, so hopefully replacing them will cure the problem.
                                (I think the parts list precedes the parts with 16, eg Q16402... ?)
                                The SC board from Panasonic is Β£197.28 trade price
                                Originally posted by masaudio
                                Yes I did replace those blown components, and that was all it was, It cured the fault and got all the components direct from Panasonic, they did not cost very much at all.
                                Originally posted by tn245
                                I just got around to finishing this repair and testing and I'm happy to report it works. On my board it was Q401, Q421, Q422, Q661 & D865 that were shorted. Q402 was actually ok although I replaced it anyway as I removed it before Q401.

                                Originally posted by tn245
                                IGBTs were from utsource.net, total cost $12 (USD) + $4 shipping. Took a couple of weeks to arrive. The diode was that BOURNS, CD214A-F1400 from ebay which was Β£1.37.
                                Originally posted by tn245
                                The 30G123s and the RJP6065 looked brand new as far as I could tell. Now that you mention it I was a little surprised that the 2PG011s both had legs already bent into position and cut the correct length. You think they're selling pulled parts as new?

                                I was pretty pleased when I heard the sustain boards buzzing instead of parts exploding yes.
                                Some parts info should you need.

                                Originally posted by tw2005
                                snipped................Q16402, 2PG0090000R (2PG009) Panasonic IGBT; VCES (V): 510; Ic (A): 40; tf (Β΅s) typ: 0.19; Vce typ: 1.95; Package: TO-220FN

                                Q16421, Q16422, = GT30G123 (30G123) Toshiba IGBT; VCES (V): 430; Ic (A): 30;(200A Peak pulse); Vce typ: 2.2; Package: TO-220FN


                                Q16661 = RJP6065DPP-90-T2 RENESAS IGBT; VCES (V): 630; Ic (A): 40; tf (Β΅s) typ: 0.45; Vce typ: 1.8; Package: TO-220FN
                                RJP63F3A would work. RENESAS

                                D16865 = RF101L4S TE25, ROHM 400V 1A
                                Q16701, = MMBTA92 NXP , PNP high-voltage transistor 300V 0.1A

                                Q16702 = 2SD0601A0L,,2PD601ART, NXP , 50 V, 100 mA NPN general-purpose transistor

                                Q16501,521,531,551,762, = SANYO, PNP / NPN Silicon Transistor, CPH5524-TL-E

                                Q16647,607,608,817,818,874 = ROHM , Small switching N-channel MOSFET (30V, 0.1A) 2SK3018T106 (2N7002 will work, watch the package sizes)

                                IC16771,= TOSHIBA TA78L05F(TE12L,F) , 78L05

                                IC16464, IC16465 , IC16773 C0JBAB000715 = TOSHIBA TC7SH14F (TE85L), (Texas Instruments SN74AHC1G14DBVR)
                                Last edited by tw2005; 03-22-2014, 07:37 PM.

                                Comment

                                • noledud
                                  Badcaps Veteran
                                  • Dec 2013
                                  • 413
                                  • united kingdom

                                  #17
                                  Re: Panasonic TX-P42S10B

                                  Yes all the missing ones are D622,Q401,Q402,Q421,Q422,Q661.

                                  Just as you suggested, im about to test the ps and i will check for that short aswell

                                  Cheers

                                  Comment

                                  • dcapper
                                    Badcaps Veteran
                                    • Dec 2013
                                    • 496
                                    • Canada

                                    #18
                                    Re: Panasonic TX-P42S10B

                                    What's with the Panasonic project parts tv? I had the exact same problem with a X2. Missing chips on boards. I replaced the A board. The P board was already replaced. Ordered an SN and SC boards. Nothing left but the buffers.

                                    Has shopjimmy or paylesscomponents got any replacement boards?

                                    I tried to repair what I had too and I gave up and found boards. But haven't received them to try them. TW has been more than helpful with my trouble too. Check out my thread. It has great info too.

                                    https://www.badcaps.net/forum/showthread.php?t=35362

                                    Comment

                                    • noledud
                                      Badcaps Veteran
                                      • Dec 2013
                                      • 413
                                      • united kingdom

                                      #19
                                      Re: Panasonic TX-P42S10B

                                      Hi all sorry for the delay in getting back on this one

                                      the power board is ok

                                      the SU has a resistance of 1.4 and the SD has 0.4 so long as im measuring right

                                      so i take it that means im going to need SU SD and SC

                                      Comment

                                      • tw2005
                                        Badcaps Legend
                                        • Oct 2011
                                        • 6458
                                        • Australia

                                        #20
                                        Re: Panasonic TX-P42S10B

                                        Originally posted by noledud
                                        Hi all sorry for the delay in getting back on this one

                                        the power board is ok

                                        the SU has a resistance of 1.4 and the SD has 0.4 so long as im measuring right

                                        so i take it that means im going to need SU SD and SC
                                        More info, units of measurement e.g. ohms, and the test points.

                                        Comment

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