Philps LCD TV Some time no back light

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  • sam_sam_sam
    Badcaps Legend
    • Jul 2011
    • 6018
    • USA
    #1

    Philps LCD TV Some time no back light

    The other night I turn on this TV and all I got was sound turn back off waited about 30 seconds and turn back on and work agian

    Once in a while when you turn this tv it just has one color on the screen if you turn it off and wait 30 second and turn it back on every is ok again

    I begin to think that one or more caps may have a higher than nomal ESR reading

    Do you think that I am right track or is some thing else going on here


    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Philps LCD TV Some time no back light

      Model number?
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        Comment

        • sam_sam_sam
          Badcaps Legend
          • Jul 2011
          • 6018
          • USA
          #3
          Re: Philps LCD TV Some time no back light

          Model # is 42PFL5332D37

          I have to wait to take this TV apart

          unless you think I need to before then

          until I have a desoilering gun which is on back order until 2-20-2012

          heating element when bad in it
          Last edited by sam_sam_sam; 02-03-2012, 08:55 PM.

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Philps LCD TV Some time no back light

              Originally posted by sam_sam_sam
              Model # is 42PFL5332D37
              Is it 42PFL5432D37 by chance? If yes, there are 3 Capxon 1500uF 35V capacitors that are bloated or will bloat. They supply 24V DC to the master and slave inverter.
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                Comment

                • sam_sam_sam
                  Badcaps Legend
                  • Jul 2011
                  • 6018
                  • USA
                  #5
                  Re: Philps LCD TV Some time no back light

                  Model # is 42PFL5332D37 what about this one

                    Comment

                    • PlainBill
                      Badcaps Legend
                      • Feb 2009
                      • 7034
                      • USA
                      #6
                      Re: Philps LCD TV Some time no back light

                      Philips 42PFL5332D37 and 42PFL5432D37 use two different chassis; the EJ3.0U LA and TPM2.0U LA respectively. The power supplies may or may not be the same.

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                        Comment

                        • sam_sam_sam
                          Badcaps Legend
                          • Jul 2011
                          • 6018
                          • USA
                          #7
                          Re: Philps LCD TV Some time no back light

                          I guess it time to take apart and check the caps on the power board with an ESR meter

                          Thank for your help

                            Comment

                            • sam_sam_sam
                              Badcaps Legend
                              • Jul 2011
                              • 6018
                              • USA
                              #8
                              Re: Philps LCD TV Some time no back light

                              I found this cross ref



                              Attached Files

                                Comment

                                • sam_sam_sam
                                  Badcaps Legend
                                  • Jul 2011
                                  • 6018
                                  • USA
                                  #9
                                  Re: Philps LCD TV Some time no back light

                                  Here are some photo of this TV set


                                  Top left photo shows the caps under the heat sinks and how they hook together and some of the caps values

                                  All caps under 35 volts are Rubycon except the ones on the inverter boards

                                  YXG replaced FC

                                  470 uf @ 25 volts ESR reading .03 cap reading 478 uf
                                  470 uf @ 25 volts ESR reading .04 cap reading 477 uf
                                  470 uf @ 25 volts ESR reading .03 cap reading 477 uf
                                  470 uf @ 25 volts ESR reading .05 cap reading 477 uf

                                  YXG replaced FC


                                  1200 uf @ 35 volts ESR reading .03 cap reading 1056 uf
                                  1200 uf @ 35 volts ESR reading .03 cap reading 1059 uf
                                  1200 uf @ 35 volts ESR reading .03 cap reading 1040 uf

                                  YXG replaced FC


                                  1000 uf @ 10 volts ESR reading .04 cap reading 1123 uf
                                  1000 uf @ 10 volts ESR reading .04 cap reading 1113 uf
                                  1000 uf @ 10 volts ESR reading .04 cap reading 1111 uf

                                  YXF replaced FC


                                  100 uf @ 35 volts ESR reading .11 cap reading 87 uf
                                  100 uf @ 35 volts ESR reading .13 cap reading 87 uf
                                  100 uf @ 35 volts ESR reading .11 cap reading 86 uf
                                  100 uf @ 35 volts ESR reading .12 cap reading 87 uf

                                  YXF replaced FC


                                  220 uf @ volts ESR reading .12 cap reading 214 uf

                                  Rubycon 85 C FRS

                                  100 uf @ 450 ESR reading .91 cap reading 88 uf
                                  100 uf @ 450 ESR reading .91 cap reading 88 uf
                                  100 uf @ 450 ESR reading .85 cap reading 89 uf
                                  100 uf @ 450 ESR reading .95 cap reading 88 uf

                                  ____________________________________________________________
                                  These cap where on the inverter board brand Samwub LT VOA Pet

                                  replaced FR


                                  470 uf @ 35 volts ESR reading .03 cap reading 440 uf
                                  470 uf @ 35 volts ESR reading .03 cap reading 438 uf
                                  470 uf @ 35 volts ESR reading .02 cap reading 436 uf
                                  470 uf @ 35 volts ESR reading .02 cap reading 436 uf
                                  ____________________________________________________________

                                  One thing I notice now that I recap this set when you turn ON the power to the set it take about 5 seconds for the sound to come on an .5 second more for the channel to show on screen then .5 second for the back light to come on to see the picture on the set

                                  It use to this when it was new

                                  What was happing was that would take 6 to 10 second for sound and picture to come on together

                                  The set has been on from 12:00 pm to 7:00 pm and work very good now
                                  Attached Files
                                  Last edited by sam_sam_sam; 02-11-2012, 06:04 PM.

                                    Comment

                                    • sam_sam_sam
                                      Badcaps Legend
                                      • Jul 2011
                                      • 6018
                                      • USA
                                      #10
                                      Re: Philps LCD TV Some time no back light

                                      Replaced with Nichicon LS

                                      All four new caps
                                      100 uf @ 450 ESR reading .71 cap reading 100 uf



                                      Rubycon 85 C FRS

                                      100 uf @ 450 ESR reading .91 cap reading 88 uf
                                      100 uf @ 450 ESR reading .91 cap reading 88 uf
                                      100 uf @ 450 ESR reading .85 cap reading 89 uf
                                      100 uf @ 450 ESR reading .95 cap reading 88 uf

                                      YXF replaced FC


                                      100 uf @ 35 volts ESR reading .11 cap reading 87 uf
                                      100 uf @ 35 volts ESR reading .13 cap reading 87 uf
                                      100 uf @ 35 volts ESR reading .11 cap reading 86 uf
                                      100 uf @ 35 volts ESR reading .12 cap reading 87 uf


                                      Dose any one think that these cap listed here could have been causing the problem that i was having wit this TV set

                                      Last edited by sam_sam_sam; 02-11-2012, 06:15 PM.

                                        Comment

                                        • sam_sam_sam
                                          Badcaps Legend
                                          • Jul 2011
                                          • 6018
                                          • USA
                                          #11
                                          Re: Philps LCD TV Some time no back light

                                          One thing I almost for got to say

                                          I found on both the inverter board where the transformer pins go to the board the solider joints look very ? able there was a lot of flux came out from the pins so I re-flow all pin's joints
                                          Last edited by sam_sam_sam; 02-11-2012, 09:06 PM.

                                            Comment

                                            • sam_sam_sam
                                              Badcaps Legend
                                              • Jul 2011
                                              • 6018
                                              • USA
                                              #12
                                              Re: Philps LCD TV Some time no back light

                                              Originally posted by sam_sam_sam
                                              The other night I turn on this TV and all I got was sound turn back off waited about 30 seconds and turn back on and work again

                                              Once in a while when you turn this TV it just has one color on the screen if you turn it off and wait 30 second and turn it back on every is OK again
                                              Up-Date

                                              From the time I recap this set until now

                                              This set come on every time I turn it on

                                              On another note about a year ago just before I found this forum which by the way where I have learn alot
                                              I found a 42 " LCD TV set in the trash pile at the street when I open it I found two caps that pop there tops replaced both of them and it still works very good today

                                              I want to thank all of the people on this forum that day in and day out help people like me Thank You
                                              Last edited by sam_sam_sam; 05-13-2012, 08:51 AM.

                                                Comment

                                                • sam_sam_sam
                                                  Badcaps Legend
                                                  • Jul 2011
                                                  • 6018
                                                  • USA
                                                  #13
                                                  Re: Philps LCD TV Some time no back light

                                                  Up-Date to this repair of this Model # is 42PFL5332D37

                                                  I still have the same problem

                                                  The sound come ON but the back lights do not come ON if you turn the set off for 30 seconds and turn it back ON it works the way it should this happen about a two month ago then about a week ago or so the same thing happen again

                                                  Dose any one have any idea what is going on with this set

                                                  Last edited by sam_sam_sam; 11-12-2012, 07:28 PM.

                                                    Comment

                                                    • sam_sam_sam
                                                      Badcaps Legend
                                                      • Jul 2011
                                                      • 6018
                                                      • USA
                                                      #14
                                                      Re: Philps LCD TV Some time no back light

                                                      Dose anyone have any idea what is happening to this set

                                                        Comment

                                                        • anno
                                                          Senior Member
                                                          • Sep 2007
                                                          • 140
                                                          • netherlands
                                                          #15
                                                          Re: Philps LCD TV Some time no back light

                                                          check the voltage to the inverter board. when the backlight is off , is there voltage (most of time 24 volt)? check if there is a 'inverter on signal' (inv_on). maybe there is a bad ccfl lamp.

                                                            Comment

                                                            • budm
                                                              Badcaps Legend
                                                              • Feb 2010
                                                              • 40746
                                                              • USA
                                                              #16
                                                              Re: Philps LCD TV Some time no back light

                                                              I see the list of caps, so the caps on the Master and Slave boards are replaced? DO AS anno suggested to see if you have those two signals when you do not have backlights.
                                                              Post closed up pictures of the inverter boards if you are not sure which pins to use for tesing.
                                                              Never stop learning
                                                              Basic LCD TV and Monitor troubleshooting guides.
                                                              http://www.badcaps.net/forum/showthr...956#post305956

                                                              Voltage Regulator (LDO) testing:
                                                              http://www.badcaps.net/forum/showthr...999#post300999

                                                              Inverter testing using old CFL:
                                                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                                                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                                              http://s807.photobucket.com/user/budm/library/

                                                              TV Factory reset codes listing:
                                                              http://www.badcaps.net/forum/showthread.php?t=24809

                                                                Comment

                                                                • sam_sam_sam
                                                                  Badcaps Legend
                                                                  • Jul 2011
                                                                  • 6018
                                                                  • USA
                                                                  #17
                                                                  Re: Philps LCD TV Some time no back light

                                                                  Thanks for the info

                                                                    Comment

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