rca l32wd22 problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • j0gigs
    Senior Member
    • Dec 2012
    • 56
    • USA

    #1

    rca l32wd22 problem

    I hope someone can help me with my problem. i have one of these rca tv's and am having trouble. I replaced all caps on the power supply including the 2 100uf 450v ones. 4 of the caps were domed and one of the 450v ones looked like there was crust coming out of one of the legs. the tv will not turn on. when i first plug it in and try to power it, sometimes the screen flashes a message across the middle of the screen in a box, but it happens so fast i cant read it. Other times the screen will light up for a brief moment and i can see what looks like a headphones icon in the top right corner of the screen.

    The tv will just sit there and not do anything. then when i power it off, the orange led flashes 4 times. sometimes it flashed 4 and a half times if that makes sence. its not like a full flash.

    i tried checking the voltages on the pins of the power supply and am getting all the voltages i should on the plug going to the main board. 5v, 12v and 15v are all good.

    I am also not getting the 24 volts on the plug going to the inverter. i am assuming it is supposed to be 24v dc right? I am not sure what to check and how to check that section of the board. can someone please help?

    Can someone please show pictures of what they replaced on the 24v side to get their tv working?

    Any help is greatly appreciated.
  • j0gigs
    Senior Member
    • Dec 2012
    • 56
    • USA

    #2
    Re: rca l32wd22 problem

    Anyone?

    Comment

    • selldoor
      Slow Learner
      • Dec 2010
      • 7870

      #3
      Re: rca l32wd22 problem

      Pictures might help - good clear ones front and back of the boards and one showing the
      setup.

      Is it possible to set your meter up on the inverter socket and watch it when you switch on.
      When it shows anything a flash or headphones it must be getting some voltage.

      Have you tried with a PC or other known working input looking for a very dark image on the screen with a flashlight
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

      Comment

      • j0gigs
        Senior Member
        • Dec 2012
        • 56
        • USA

        #4
        Re: rca l32wd22 problem

        I did some more checking on the power supply today. I am getting all of the required voltages from the power supply. When I first turn the tv on, the backlight will flash for a brief moment. If I shine a flashlight on the screen I do see a dark image. I did a channel scan and do get sound.

        I checked the backlight inverter and am getting 24 volts to it. Does this mean the backlight inverter is bad? Is there a way to test it or repair it?

        Comment

        • vinceroger69
          Badcaps Legend
          • Mar 2012
          • 6714
          • uk

          #5
          Re: rca l32wd22 problem

          pictures of the boards will help maybe test the voltage to each side of the tcon fuse.

          Comment

          • j0gigs
            Senior Member
            • Dec 2012
            • 56
            • USA

            #6
            Re: rca l32wd22 problem

            here are some pictures of the tcon and inverter boards. i checked the 3 fuses on the inverter board as well as the 1 on the tcon with a meter and all have continuity.

            i suspect it may be the inverter board, but am not 100% sure. if i shine a flash light on the panel, i can see a picture as well as hear audio. when i unplug the tv for a minute and plug it back in, the backlight comes on when i turn it on for a second amd then goes out. if i unplug the wires going to the backlights is there a way to test to see if it is a bad ballast? how can i test the ballasts?
            Attached Files

            Comment

            • vinceroger69
              Badcaps Legend
              • Mar 2012
              • 6714
              • uk

              #7
              Re: rca l32wd22 problem

              check both of the white fuses on the invertor board whats the part numbers on the transformers maybe able to get the details for them to test each winding etc i always test fuses where possible with a voltage reading on each end i have had false readings on continuity mode with my meter.
              Last edited by vinceroger69; 12-11-2013, 03:39 PM.

              Comment

              • newtothis
                Badcaps Legend
                • Mar 2013
                • 1556
                • england

                #8
                Re: rca l32wd22 problem

                Originally posted by vinceroger69
                pictures of the boards will help maybe test the voltage to each side of the tcon fuse.
                T-con fuse isn't suspect as their is an image

                Comment

                • vinceroger69
                  Badcaps Legend
                  • Mar 2012
                  • 6714
                  • uk

                  #9
                  Re: rca l32wd22 problem

                  Originally posted by newtothis
                  T-con fuse isn't suspect as their is an image
                  i realised that after i wrote it hahaha to late to edit post.

                  Comment

                  • newtothis
                    Badcaps Legend
                    • Mar 2013
                    • 1556
                    • england

                    #10
                    Re: rca l32wd22 problem

                    Can you take some good clear pictures of the PSU so I can see the caps.

                    Comment

                    • vinceroger69
                      Badcaps Legend
                      • Mar 2012
                      • 6714
                      • uk

                      #11
                      Re: rca l32wd22 problem

                      just re read post 1 so your not getting 24 volts on the psu connector?

                      Comment

                      • newtothis
                        Badcaps Legend
                        • Mar 2013
                        • 1556
                        • england

                        #12
                        Re: rca l32wd22 problem

                        Originally posted by vinceroger69
                        just re read post 1 so your not getting 24 volts on the psu connector?
                        Indeed, With seems like bad caps

                        Comment

                        • vinceroger69
                          Badcaps Legend
                          • Mar 2012
                          • 6714
                          • uk

                          #13
                          Re: rca l32wd22 problem

                          that whats confusing me in post 1 he says he replaced them all including the 450 volt ones wonder what brand they are? pictures will tell no doubt.

                          Comment

                          • vinceroger69
                            Badcaps Legend
                            • Mar 2012
                            • 6714
                            • uk

                            #14
                            Re: rca l32wd22 problem

                            Originally posted by j0gigs
                            I did some more checking on the power supply today. I am getting all of the required voltages from the power supply. When I first turn the tv on, the backlight will flash for a brief moment. If I shine a flashlight on the screen I do see a dark image. I did a channel scan and do get sound.

                            I checked the backlight inverter and am getting 24 volts to it. Does this mean the backlight inverter is bad? Is there a way to test it or repair it?
                            do you only get the 24 volts for a very breif period then?

                            Comment

                            • j0gigs
                              Senior Member
                              • Dec 2012
                              • 56
                              • USA

                              #15
                              Re: rca l32wd22 problem

                              when i got this tv, there were a few caps on the power supply that were bulged. i ordered a cap kit and replaced all the caps on the power supply. now when i turn the tv on, i get all the voltages i am supposed to on the power supply. i checked both of the connectors and am getting the 24 volts to the inverter as well as the 3 volts to the inverter. i am also getting 5, 12, and 15 volts to the main board.

                              Vinceroger69, the numbers on the top of the transformers are 4002y648004(cp)-03

                              Comment

                              • newtothis
                                Badcaps Legend
                                • Mar 2013
                                • 1556
                                • england

                                #16
                                Re: rca l32wd22 problem

                                So you do get the 24v?

                                Are the fuses that vinceroger mentioned ok?

                                Also what brand and series of Caps did you use?

                                Comment

                                • vinceroger69
                                  Badcaps Legend
                                  • Mar 2012
                                  • 6714
                                  • uk

                                  #17
                                  Re: rca l32wd22 problem

                                  did you read this thread? as per post 20 whats your readings
                                  https://www.badcaps.net/forum/showthread.php?t=25600

                                  Comment

                                  • j0gigs
                                    Senior Member
                                    • Dec 2012
                                    • 56
                                    • USA

                                    #18
                                    Re: rca l32wd22 problem

                                    I did not see that post. i will take some readings and report back.

                                    thanks

                                    Comment

                                    • j0gigs
                                      Senior Member
                                      • Dec 2012
                                      • 56
                                      • USA

                                      #19
                                      Re: rca l32wd22 problem

                                      Viceroger69,

                                      Here are the results of my testing:
                                      LDO #1 Pin1 no voltage Pin2 3.30v pin3 5.04v
                                      LDO #2 Pin1 no voltage Pin2 3.30v pin3 5.04v
                                      LDO #3 Pin1 no voltage Pin2 3.30v pin3 5.04v

                                      On the inverter board, all 3 of the fuses read 24.04v on both sides.

                                      The voltages at the cable plugged into the inverter board are:
                                      Pins 1-5 (VDD) 24.04v
                                      pins 6-10 (GND)
                                      pin 11 -not used-
                                      pin 12 (BL ON) 3.27v
                                      pin 13 (VDIM) 3.27v

                                      The fuse on the tcon board reads 4.85v on both sides.

                                      I found specs for the transformer here: http://lcdparts.net/TransformerDetai...ProductID=3502

                                      The secondary resistance should be about 1.2K between S1 and S2 (or S3 and S4) and the primary resistance should be about 0.5 ohm between P1 and P2.

                                      I checked all my transformers and found all primary resistances to be .4 ohms.
                                      I also checked both secondary coils on each of the 6 transformers and all were between 1.19k - 1.20k except one. one of the secondary coils was 1.20k and the other was 2.48k.

                                      Do you think this is my problem?
                                      Last edited by j0gigs; 12-11-2013, 05:44 PM.

                                      Comment

                                      • vinceroger69
                                        Badcaps Legend
                                        • Mar 2012
                                        • 6714
                                        • uk

                                        #20
                                        Re: rca l32wd22 problem

                                        there is a percentage allowed but im still new with repairs to say yes or no wait for a more experienced person to advise you but my thougts are yes its faulty but we will see.

                                        Comment

                                        Related Topics

                                        Collapse

                                        • mmccomputer
                                          problem with replacing lcd screen
                                          by mmccomputer
                                          I have an HP model : 14-cf0011nf and I want to change its display screen (it has an original 14" full HD TN 30 pins panel) which works without problem but I want to put another screen with an IPS panel, the problem is that I tried several screens but there is no display except with the original screen, I never had this problem before I changed hundreds without problems but this PC is not 'accepted than its original screen
                                          otherwise on the motherboard it displays edp and I don't know, do the panels I tried only work with the LVDS protocol?
                                          If anyone has any information on the subject...
                                          12-15-2024, 03:44 PM
                                        • jimjoe123
                                          LCD TV Green/Pink screen problem
                                          by jimjoe123
                                          I have a Dick Smith 37" LCD TV, Model GE6804. I am using it as PC extended monitor only.

                                          Problem is while watching tv, I hear a semi loud click(like a electrical breaker tripping due to overload, just sound like it but no actual electrical overload), then screen is covered with green or pink. I can still see the original picture image but overlayed by green or pink. See attached images. Pink.jpg is what I see, and Normal.jpg is before green or pink screen, What I captured was pink screen, but about 80% of time it's green and 20% of time it's pink.

                                          Then each time...
                                          02-23-2020, 01:29 AM
                                        • Chrissygizmo
                                          Sony KD-55XG9505 lines on screen problem
                                          by Chrissygizmo
                                          Hello again everyone,

                                          This is my latest mission, to try getting this Sony tv back to normal working order…

                                          I've only just got it today, when you power it up everything is as should be, in fact it works perfectly for a few minutes then the screen starts getting horizontal lines on & eventually the full screen goes back, I will upload photos of the problem & also some photos of the board etc. You might notice that I'm busy trying the tape method, I'm not sure exactly where the clock lines are so I'm just guessing & hoping for the best lol . I've already tried...
                                          02-19-2025, 11:31 AM
                                        • smic717394
                                          iphone XS turns off when press on screen.
                                          by smic717394
                                          Hi,

                                          I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on...
                                          07-25-2024, 10:16 AM
                                        • mferna14
                                          MacBook Air A2681 battery problem after Screen Replacement
                                          by mferna14
                                          Hi, my dear friends., Maybe this might be a stupid question or something I missed or do not know. I have 2 MacBook Air A2681 (Indentical color & EMC #), both LCD screens broken. Before ordering the LCD Screens I confirmed both worked with their respective batteries & AC Adapters, & they did 100%. The LCD Screens came in today & I replaced LCD for the 1st A2681. (Removed Battery Terminal cable for both Laptops before installation of LCDs). Perfect Screen & Booted up fine. But it did not work with battery. I checked the battery connector & it was seated in well/perfectly....
                                          12-06-2024, 08:10 PM
                                        • Loading...
                                        • No more items.
                                        Working...