Announcement

Collapse
No announcement yet.

Panasonic TH-42PY80 10 blinks

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    Panasonic TH-42PY80 10 blinks

    Hi guys

    10 blinks on this one.
    Caps on MC201 and MC301 already changed.
    15V present, so are all sub voltages on A board.
    Vsus is not coming at all after i press the power button. I tried with replacing MC201 and MC301 places as they are interchangable but problem stayed the same - 15V OK, no Vsus so i would rule those out as being problem?
    I isolated SC and SS board, but Vsus not coming up, not even for a second, not a single V.
    Thermal fuse on Vsus transformer isn't open, unfortunately

    I assume it is something on P board, Vsus section?
    Tags: None
    #2
    Re: Panasonic TH-42PY80 10 blinks

    this might be a long shot but try disconnecting A5,A6,A7 and turn TV on and see if you get white screen.

    Comment

      #3
      Re: Panasonic TH-42PY80 10 blinks

      Tried that, but no white screen, it simply doesn't power screen on, i assume it is because there is no Vsus present, but i am not 100% sure

      Comment

        #4
        Re: Panasonic TH-42PY80 10 blinks

        sounds definitely PSU issue, was going to suggest thremal fuse but you've tried that too.

        Comment

          #5
          Re: Panasonic TH-42PY80 10 blinks

          Have you already checked the two mosfets driving the vsus for shorts? also I believe its fuse 201 for open?
          Liberating magic smoke one part at a time

          Comment

            #6
            Re: Panasonic TH-42PY80 10 blinks

            Do the fans on your set start spinning at all?
            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

              #7
              Re: Panasonic TH-42PY80 10 blinks

              Originally posted by Caleb View Post
              Have you already checked the two mosfets driving the vsus for shorts? also I believe its fuse 201 for open?
              They aren't shorted, and all fuses on P board are ok, not open
              Originally posted by tom66 View Post
              Do the fans on your set start spinning at all?
              No, not a single spin

              Comment

                #8
                Re: Panasonic TH-42PY80 10 blinks

                Can anyone confirm me that Vsus should arise when i press switch button, same as 15V come right up? Vda not present to (altough i read somwhere that it won't if Vsus is missing). Don't know if i should concentrate on something else or i'm on the right track

                Comment

                  #9
                  Re: Panasonic TH-42PY80 10 blinks

                  OK, fixed it

                  Vsus was not coming on so I was checking every bit in that section and everything looked OK. Only thing that was missing is SUS_ON signal from MC701. Removed it from PSU and only thing that i could tell is poor soldering of IC on that module (CH47AUG-7A18) and maybe even some corrosion. Resoldered it, put it back on PSU and now Vsus came on. But still no Vda - and again everything was leading to that module (Vda_ON missing). Took it of again, resoldered IC, checked with magnifier, put it back on and voila - TV turned on
                  So another one PY (PZ) series with non common fault ended at my place, no easy fixes for me

                  Comment

                  Previous template Next
                  Working...
                  X