Samsung UA46B7100WFXXY

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • Aussie
    Member
    • Aug 2014
    • 18
    • Australia
    #1

    Samsung UA46B7100WFXXY

    Hello everyone, I know this is only my second post but I do intend to spend some time on this forum and hopefully add as much information that I can..

    I like to repair audio equipment normally but would like to learn more about TV repair.
    In my travels today I picked up one of these TV's....
    So far...Green screen, I cleaned ribbon cables and now have picture.
    I now have horizontal white stripes across full screen, kind of like looking through lines..
    So I re cleaned ribbon connections and seems the lines are a little tighter...
    still not the problem...so I pulled power board and checked all caps with an esr meter...all test good....

    After some more testing, it seems that picture is better when first powered on, then degrades shortly after, when components warm up...then I start to get vertical ghosting.....

    would like to know where to start troubleshooting this TV...can anyone help?
    Last edited by Aussie; 08-25-2014, 04:07 AM.
    Tags: None
    • Aussie
      Member
      • Aug 2014
      • 18
      • Australia
      #2
      Re: Samsung UA46B7100WFXXY

      Here are some Pictures of screen and boards for reference...
      Attached Files

        Comment

        • Aussie
          Member
          • Aug 2014
          • 18
          • Australia
          #3
          Re: Samsung UA46B7100WFXXY

          I know the power board is loaded with cheap caps and I would like to replace these., although they all test ok.....But I am hesitant to move forward at this stage until I have more information regarding this model....

            Comment

            • Aussie
              Member
              • Aug 2014
              • 18
              • Australia
              #4
              Re: Samsung UA46B7100WFXXY

              No clues ?

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: Samsung UA46B7100WFXXY

                  We have seen this before on this forum. It is a bad LCD panel. No fix is currently known. Sorry.
                  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

                    • Aussie
                      Member
                      • Aug 2014
                      • 18
                      • Australia
                      #6
                      Re: Samsung UA46B7100WFXXY

                      If that is the case, would the same problem not present its self all the time ? picture gets worse about a minute after powered on

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK
                          #7
                          Re: Samsung UA46B7100WFXXY

                          No, some LCD panel faults can get worse as a set warms up.
                          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

                            • mmartell
                              Badcaps Legend
                              • Oct 2013
                              • 3189
                              • Canada
                              #8
                              Re: Samsung UA46B7100WFXXY

                              Try cooling spray on the boards one at a time. Obviously if you see an improvement you've narrowed the source. And if not, well, tom's already stated the alternative...

                              As a last resort you could tear it down to the tabs but I'm not sure tab bonds manifest in this way.

                                Comment

                                • Aussie
                                  Member
                                  • Aug 2014
                                  • 18
                                  • Australia
                                  #9
                                  Re: Samsung UA46B7100WFXXY

                                  Hmm ok, well I hope its not the screen...I would still like to be sure though before I discard it.....
                                  So this morning I powered unit up again via power board switch and the green screen returned....powered off again and re checked ribbon, then back on via power board...still green, I then turned it off and back on again via power button and got picture back....still with other issues shown....

                                  I have now been over boards with electronic freeze spray with no changes....is there a service manual for this this so I can check voltages?
                                  Are the pictures I have shown clear enough?

                                    Comment

                                    • Aussie
                                      Member
                                      • Aug 2014
                                      • 18
                                      • Australia
                                      #10
                                      Re: Samsung UA46B7100WFXXY

                                      Originally posted by mmartell

                                      As a last resort you could tear it down to the tabs but I'm not sure tab bonds manifest in this way.
                                      Could you explain what you are talking about here? or possibly direct me to another thread on this topic?

                                        Comment

                                        • Aussie
                                          Member
                                          • Aug 2014
                                          • 18
                                          • Australia
                                          #11
                                          Re: Samsung UA46B7100WFXXY

                                          just some more info, after again removing power supply board and rechecking caps, resistor values and diodes I then re installed....
                                          after reinstalling the green screen returned again. i shifted it off the bench to do something else at that point.
                                          when i set up again i didn't realize at first i had placed set upside down....I didn't bother flipping as i only intended to test voltages...But it came back to a picture again.

                                          I then unplugged again and flipped the right way up, when i turned it on i had the clearest picture ive had yet...

                                          Look, I know you guys know your stuff, but is it possible I have a board issue here?

                                          I then took the tv inside for the first time and plugged in PAL antenna, the television really struggled to get a decent signal...barely able to get a channel where my other tv a Panasonic Viera has no problem at all....

                                          also checked internet Ethernet line in, all working well...

                                          but still have the lines.....

                                            Comment

                                            • Aussie
                                              Member
                                              • Aug 2014
                                              • 18
                                              • Australia
                                              #12
                                              Re: Samsung UA46B7100WFXXY

                                              Although there is information on the Power supply board regarding voltages, I am unsure what to match to the rails leaving that board....
                                              I did however note several at 5.2v, couple at 12v BUT, one at 2.2 v...this seemed odd to me?

                                                Comment

                                                • Aussie
                                                  Member
                                                  • Aug 2014
                                                  • 18
                                                  • Australia
                                                  #13
                                                  Re: Samsung UA46B7100WFXXY

                                                  Originally posted by tom66
                                                  We have seen this before on this forum. It is a bad LCD panel. No fix is currently known. Sorry.
                                                  If this has been heavily discussed on this forum before and I am trying to flog a dead horse here, would you mind linking me to the thread?

                                                    Comment

                                                    • Aussie
                                                      Member
                                                      • Aug 2014
                                                      • 18
                                                      • Australia
                                                      #14
                                                      Re: Samsung UA46B7100WFXXY

                                                      This is how good the picture was before i took it into the house.....it was clear like that for a good ten minutes...still very fine horizontal lines though....if you stand back its not obvious....
                                                      Attached Files

                                                        Comment

                                                        • mmartell
                                                          Badcaps Legend
                                                          • Oct 2013
                                                          • 3189
                                                          • Canada
                                                          #15
                                                          Re: Samsung UA46B7100WFXXY

                                                          Originally posted by Aussie
                                                          Could you explain what you are talking about here? or possibly direct me to another thread on this topic?
                                                          https://www.badcaps.net/forum/showthread.php?t=25371

                                                            Comment

                                                            • mmartell
                                                              Badcaps Legend
                                                              • Oct 2013
                                                              • 3189
                                                              • Canada
                                                              #16
                                                              Re: Samsung UA46B7100WFXXY

                                                              Even if this were a main board issue there is only a small chance of repairing it due to its complexity. If you want to chance it order up a new (replacement) board.

                                                                Comment

                                                                • Aussie
                                                                  Member
                                                                  • Aug 2014
                                                                  • 18
                                                                  • Australia
                                                                  #17
                                                                  Re: Samsung UA46B7100WFXXY

                                                                  Originally posted by mmartell
                                                                  Even if this were a main board issue there is only a small chance of repairing it due to its complexity. If you want to chance it order up a new (replacement) board.
                                                                  Thanks for the link there, that was helpful...I will look at that next...

                                                                  As far as ordering any new boards, I will not be doing that unless I am certain I have located the problem, I normally repair audio circuit's. I've not done much TV or surface mounted board work though and I am still a learner....

                                                                  Currently back to Green screen!

                                                                    Comment

                                                                    • Aussie
                                                                      Member
                                                                      • Aug 2014
                                                                      • 18
                                                                      • Australia
                                                                      #18
                                                                      Re: Samsung UA46B7100WFXXY

                                                                      Originally posted by tom66
                                                                      We have seen this before on this forum. It is a bad LCD panel. No fix is currently known. Sorry.
                                                                      G'day Tom, Do you mind if I ask what is "this" problem?

                                                                        Comment

                                                                        • Aussie
                                                                          Member
                                                                          • Aug 2014
                                                                          • 18
                                                                          • Australia
                                                                          #19
                                                                          Re: Samsung UA46B7100WFXXY

                                                                          I reset all ribbon to T board and got picture back...hoping to possibly improve again I reset them again, and now back to green screen....
                                                                          Its a bit of a head ache handling a 46 inch tv.....
                                                                          I would be very grateful if someone could be of more help...

                                                                            Comment

                                                                            • tom66
                                                                              EVs Rule
                                                                              • Apr 2011
                                                                              • 32560
                                                                              • UK
                                                                              #20
                                                                              Re: Samsung UA46B7100WFXXY

                                                                              Originally posted by Aussie
                                                                              G'day Tom, Do you mind if I ask what is "this" problem?
                                                                              Visible image with lines on screen. Common fault

                                                                              https://www.badcaps.net/forum/showth...ight=ue46b6000
                                                                              https://www.google.co.uk/search?q=ue...ml%3B350%3B263

                                                                              Other panel faults with these models:
                                                                              https://www.badcaps.net/forum/showth...ight=ue55b7000

                                                                              All Samsung LED-LCD TV is hit and miss, bad panels are common, so I avoid them now.
                                                                              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

                                                                                Previous 1 2 template Next

                                                                                Related Topics

                                                                                Collapse
                                                                                • C152Heavy
                                                                                  Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board
                                                                                  by C152Heavy
                                                                                  Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board

                                                                                  Summary for TL-DR readers:
                                                                                  • Backlight is intermittent, may come on with TV boot or not. No flickering, never fails during TV on.
                                                                                  • Have obtained Samsung schematic & service documents - Can upload if helpful.
                                                                                  • Have read ALL applicable threads
                                                                                  • C1818 and CP820 replaced as low hanging fruit
                                                                                  • CN802 data taken for normal and failed BL operation. SUMMARY: Pin 2 - 5vDet = 3.52 @normal, 0.0 @BL fail. Pin 6 - EPWM = 1.631 @normal, 1.058 @BL fail.
                                                                                  • VCC pin (18) of PFC...
                                                                                  01-11-2023, 02:53 PM
                                                                                • ohren
                                                                                  Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea?
                                                                                  by ohren
                                                                                  I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.

                                                                                  I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.

                                                                                  The models launched in 2018 and 2019 respectively....
                                                                                  09-08-2023, 05:24 PM
                                                                                • brucetv
                                                                                  Samsung stooping to a new low
                                                                                  by brucetv
                                                                                  Well, just snapped the back on another piece of crap less than 2 year old Samsung after giving the customer the bad news that the lower panel driver boards have so many shorts its not recoverable. Now if your tv takes even a subtle surge it not only takes out part of your main board/tcon board it keeps on going right into those lower panel driver boards and the customer doesn't want to pay my hourly fee to find shorted caps in parallel, fried resistors, and shorted diodes. We really started to see them roll in like this in the KS,MU,NU, RU, and now QN series Samsung's it seems they are deliberately...
                                                                                  08-08-2021, 01:34 PM
                                                                                • torchzack
                                                                                  Samsung 55" TV - Boot loop but sometimes works fine - UE55MU6470U
                                                                                  by torchzack
                                                                                  Hi Team - just joined to see if anyone can offer some expertise in diagnosing an issue with a TV.

                                                                                  I've done a few hours googling and youtubing but just seeing if anyone has any insight here. I got a 55" Samsung UE55MU6470U which seems to boot loop and then after 10 mins will boot, work for a few minutes, then turn off and repeat.

                                                                                  Whilst it's on into the normal Samsung menu/boot screen it looks perfect - so I can't see there being any screen issues. I've seen lots of videos with taping across clock lines to diagnose which particular one may be an issue but i don't...
                                                                                  08-28-2023, 07:42 AM
                                                                                • angelos
                                                                                  Samsung LED TV UA55NU7300k (TV rebooting on startup)
                                                                                  by angelos
                                                                                  Hi Guys,
                                                                                  I got in this set that keeps restarting on switch on. I never get an image, i only see back lights on and off and the startup sound of Samsung and then it starts up all over doing the same thing.
                                                                                  The set has one big flat ribbon going to the scalar board from the main board. I figured that the set is shutting down because of error feedback signals feeding back to the main board.
                                                                                  I blanked off a certain section on the ribbon and got the TV to start up but it is a very milky white picture. I experimented blanking off different sections but to no avail.
                                                                                  I think...
                                                                                  07-12-2023, 02:50 AM
                                                                                • Loading...
                                                                                • No more items.
                                                                                Working...