Announcement

Collapse
No announcement yet.

Sharp AQUOS LC90LE6570 Lightning Damage

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

    Sharp AQUOS LC90LE6570 Lightning Damage

    I have 3 tv's on of which is a Sharp LC90LE6570. I am trying to troubleshoot what parts I need to repair or just replace. I assume the power supply board and or the logic board are going to be the ones with damage.

    First I do not get indication of power and no standby light power or anything... zilch with the tv plugged in. I tried to volt meter power pins on the logic board and I do not see any voltages. So over to the power supply. Fuse is good and getting rectified DC voltages over to the relay section of the Primary power side. I do not get any power readings on the pin headers going to the Logic board including the STB pin 24.

    So my assumption is Power supply standby power circuit needs more attention. Anyone here have experience with this scenario and if so any direction you would recommend. I do see some power supply replacement parts online that I can buy to replace and most likely thats what I will end up doing.... but figured I would post it here to see what you guys think.
    Attached Files
    Tags: None
    #2
    Re: Sharp AQUOS LC90LE6570 Lightning Damage

    What is voltage on main cap?
    I assume no responsibility for any stupid suggestions I might post.

    Comment

      #3
      Re: Sharp AQUOS LC90LE6570 Lightning Damage

      fuses ok ?

      Comment

        #4
        Re: Sharp AQUOS LC90LE6570 Lightning Damage

        You have an ic on back of power board that seems to control everything. Need to read # and try to find data for it.
        I assume no responsibility for any stupid suggestions I might post.

        Comment

          #5
          Re: Sharp AQUOS LC90LE6570 Lightning Damage

          Originally posted by dskall View Post
          What is voltage on main cap?
          The first Cap it hits (Blue Ceramic?) is registering ac 120v. The two largest caps on the same Primary Power side of the board are measuring 165v DC.

          Comment

            #6
            Re: Sharp AQUOS LC90LE6570 Lightning Damage

            Originally posted by dskall View Post
            You have an ic on back of power board that seems to control everything. Need to read # and try to find data for it.
            Will do. Probing the larger Caps near the main chip are 0v.

            Comment

              #7
              Re: Sharp AQUOS LC90LE6570 Lightning Damage

              Originally posted by petehall347 View Post
              fuses ok ?
              Yes main fuse is good. As far as any other fuses (surface mount?) is there any more I should be looking for?

              Comment

                #8
                Re: Sharp AQUOS LC90LE6570 Lightning Damage

                I found no schematic or repair kit for your board. I think your best bet is to get number off of chip on back and hopefully find info on it. Budm or someone else may have to help you. I am not good at tracing out circuits.
                I assume no responsibility for any stupid suggestions I might post.

                Comment

                  #9
                  Re: Sharp AQUOS LC90LE6570 Lightning Damage

                  Here is some readings. Just probing around. Trying to see where standby current is coming from. Also is 165V DC a correct voltage for this board?
                  Attached Files

                  Comment

                    #10
                    Re: Sharp AQUOS LC90LE6570 Lightning Damage

                    165v is good in standby
                    I assume no responsibility for any stupid suggestions I might post.

                    Comment

                    Previous template Next
                    Working...
                    X