Viore PDP42V18HA Bad "YSUS" board?

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  • ewicp
    A&P Mechanic
    • Jun 2013
    • 3
    • USA
    #1

    Viore PDP42V18HA Bad "YSUS" board?

    Greetings all,
    I just got the above mentioned Viore plasma TV. After some poking around inside, I found a blown fuse on the "YSUS", PN6871QYH953A, board. (The fuse on the in-board side of the board) I replaced it and although it didn't pop, the TV's relay actuated a few times and the the power led went out. With the fuse NOT installed, the red "standby" led comes on and then turns green when the TV is powered up but that is all that happens; no picture, no sound.
    Not knowing much about troubleshooting electronics, would it be safe to assume that something is amiss with "YSUS" board? Or is the power supply more suspect?
    Thanks in advance for your help!

    Eric
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Viore PDP42V18HA Bad "YSUS" board?

      This is most likely.
      Can you show us some pictures of the chassis layout?
      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

        • flocko
          Badcaps Legend
          • Nov 2012
          • 1121
          • uk
          #3
          Re: Viore PDP42V18HA Bad "YSUS" board?

          Hi the Y Sus board PN6871QYH953A has an IPM module under the big heatsink that has failed and blown the Vs fuse this is common with this board. Replacement boards that can be fitted are 6871OYH953A 6871QYH953B 6871QYH053A 6871QYH053B the IPM can also be replaced, but this is not a job that can be completed without the right tools

            Comment

            • capkid
              Badcaps Legend
              • Oct 2010
              • 1339
              • United States
              #4
              Re: Viore PDP42V18HA Bad "YSUS" board?

              If you decide to change the IPMs, which isn't an easy task without the right tools as has been mentioned and could result in damage to the board, it's recommended that both the Y-Sus and Z-Sus IPMs be changed at the same time. The Z-Sus IPM could fail shortly after the Y-Sus IPM.
              Last edited by capkid; 06-02-2013, 03:07 AM.
              LG Plasma Mal-Discharge Correction Service

                Comment

                • ewicp
                  A&P Mechanic
                  • Jun 2013
                  • 3
                  • USA
                  #5
                  Re: Viore PDP42V18HA Bad "YSUS" board?

                  FANTASTIC information! (and good news..) Thanks guys!!
                  I'll try to post pics later today.
                  I saw a pair of "rebuilt" boards, the YSUS and ZSUS, for approximately $150, that seems pretty good but you folks seem to know a bunch more than me.

                    Comment

                    • capkid
                      Badcaps Legend
                      • Oct 2010
                      • 1339
                      • United States
                      #6
                      Re: Viore PDP42V18HA Bad "YSUS" board?

                      Originally posted by ewicp
                      FANTASTIC information! (and good news..) Thanks guys!!
                      I'll try to post pics later today.
                      I saw a pair of "rebuilt" boards, the YSUS and ZSUS, for approximately $150, that seems pretty good but you folks seem to know a bunch more than me.
                      I'd ask if the IPMs were actually replaced with NEW IPMs when they were rebuilt. Some may be using pulled IPMs from other boards that may have a relatively short lifespan. Also, do the sustains come with a warranty?
                      Last edited by capkid; 06-02-2013, 03:00 PM.
                      LG Plasma Mal-Discharge Correction Service

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK
                          #7
                          Re: Viore PDP42V18HA Bad "YSUS" board?

                          Buffer may also need changing...
                          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

                            • ewicp
                              A&P Mechanic
                              • Jun 2013
                              • 3
                              • USA
                              #8
                              Re: Viore PDP42V18HA Bad "YSUS" board?

                              These are the pics as promised. Late, but...
                              The last shows some oily substance, on the back-plain, under the Zsus board. There was also some of this material on the YSus board. Anyone know what it is and is it normal?

                              Thanks again!

                              Eric
                              Attached Files

                                Comment

                                • capkid
                                  Badcaps Legend
                                  • Oct 2010
                                  • 1339
                                  • United States
                                  #9
                                  Re: Viore PDP42V18HA Bad "YSUS" board?

                                  I've seen this "oily" substance on the back of sustains a few times when repairing LG-based TVs. I thought it was flux residue, but I'm not sure. I would just wipe it off with some 99% alcohol. It's never affected the functionality of any TV I've repaired.
                                  LG Plasma Mal-Discharge Correction Service

                                    Comment

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