Polaroid *cough* TLA-01511C EPC-19 and Inverter question

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • BarrelRoll
    Member
    • Jan 2011
    • 34
    #1

    Polaroid *cough* TLA-01511C EPC-19 and Inverter question

    Cliffs: is 660 Ohms secondary resistance OK for EPC-19 transformer?

    Non cliffs:

    I was given one of these units to try and fix. It was doing 2 sec then off so I cracked it open and you guessed in. HEC and ProCon caps almost every one bulging.

    I replaced all but 2 little ProCon's with Rubycon PX, ZL, and one MCZ. Just haven't gotten to the last 2 little ProCons. Right now I'm waiting on new CCFLs to replace the very badly burned tubes that were in there. So since I have it apart I decided to check the secondary transformer, an EPC-19. The reading across the primary is 1.5 Ohms but the secondary is 660 Ohms (in circuit); which is lower than the ~1kOhm for another LCD I was working on. Is that a reasonable reading for this transformer or potentially suspect?

    I tried finding a data sheet for it but all I can seem to find are ordering pages that list dimensions and mounting options, but no detailed technical data.

    If anyone has any ideas I'd be most appreciative to hear them. Even if it's telling me I shouldn't have used Rubycon PX or ZL for this (I didn't know to check ESR and compare series etc.)

    Thanks in advance!
    Last edited by BarrelRoll; 01-20-2011, 09:07 PM.
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

      Originally posted by BarrelRoll
      The reading across the primary is 1.5 Ohms but the secondary is 660 Ohms (in circuit); which is lower than the ~1kOhm for another LCD I was working on. Is that a reasonable reading for this transformer or potentially suspect?
      660 is reasonable. Not all transformers will measure 1000 ohms.
      --- begin sig file ---

      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

      Please do not post inline and offsite as they slow down the loading of pages.

      --- end sig file ---

        Comment

        • BarrelRoll
          Member
          • Jan 2011
          • 34
          #3
          Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

          Excellent, thanks!

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

              Originally posted by BarrelRoll
              Even if it's telling me I shouldn't have used Rubycon PX or ZL for this (I didn't know to check ESR and compare series etc.)
              PCBONEZ explains it here ...

              https://www.badcaps.net/forum/showpo...30&postcount=7

              PS. Post a picture of the boards so we have a reference for future. Please post using the manage attachments button and do not post inline.
              --- begin sig file ---

              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

              Please do not post inline and offsite as they slow down the loading of pages.

              --- end sig file ---

                Comment

                • BarrelRoll
                  Member
                  • Jan 2011
                  • 34
                  #5
                  Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                  OK here's after the recap. Received new CCFLs yesterday, soldered everything up and still getting 2 sec and off sometimes, then sometimes the backlights restart, eventually though I started hearing buzzing or arcing coming from somewhere and an ozone like smell so I pulled the plug. Time to recheck my soldering work and take the panel back apart.
                  Attached Files

                    Comment

                    • PlainBill
                      Badcaps Legend
                      • Feb 2009
                      • 7034
                      • USA
                      #6
                      Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                      Originally posted by BarrelRoll
                      OK here's after the recap. Received new CCFLs yesterday, soldered everything up and still getting 2 sec and off sometimes, then sometimes the backlights restart, eventually though I started hearing buzzing or arcing coming from somewhere and an ozone like smell so I pulled the plug. Time to recheck my soldering work and take the panel back apart.
                      Ozone smell = arcing.

                      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

                        • yesterdayze
                          New Member
                          • Feb 2011
                          • 3
                          #7
                          Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                          Hi, not to thread jack but a quick question for BarrelRoll.... When you ordered your CCFLs do you by any chance know what diameter they were or would you be kind enough to point me in the direction of where you ordered them? I have replaced CCFLs before but I can't find anything on the size used in the TLA-01511C.

                            Comment

                            • BarrelRoll
                              Member
                              • Jan 2011
                              • 34
                              #8
                              Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                              I ordered them from http://www.ccflwarehouse.com/ The size I came up with was 2 tubes of 2.0mm x 334mm. If you want to get an assembly, it's figure 5 for the wire layout.

                              As a note of caution, there's a nearly invisible clear plastic retainer/spacer in the middle of the reflector tray that holds the tubes that I didn't see, and ended up breaking both the tubes in half when I tried to remove them. So keep an eye out for that. Be extra careful removing the end caps. Both of mine disintegrated when I tried to remove the old tubes.

                                Comment

                                • yesterdayze
                                  New Member
                                  • Feb 2011
                                  • 3
                                  #9
                                  Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                                  Awesome, thank you very much for the information! That is very useful and I appreciate the tip in the retainer.

                                    Comment

                                    • BarrelRoll
                                      Member
                                      • Jan 2011
                                      • 34
                                      #10
                                      Re: Polaroid *cough* TLA-01511C EPC-19 and Inverter question

                                      No problem. Good luck!

                                      Here's the original electrolytic cap list from the PS:

                                      ProView
                                      PI-XXXXTLTX Version:A
                                      200-001-XXXXTLTX-AH
                                      DTAE: 2007/09/27

                                      w x h

                                      1x HEC 1500uF 10V ZM Series 105C CV40 10mm x 17mm
                                      2x HEC 470uF 25V ZD Series 105C CV39 8mm x 16mm
                                      4x HEC 1000uF 25V ZP Series 105C CV42 10mm x 20.5mm
                                      1x ProCon 470uF 25V EY Series 105C (M) 10mm x 17mm
                                      2x ProCon 680uF 10V EY Series 105C (M) 8mm x 16.2mm
                                      1x HEC 10uF 50V ZP Series 105C CV39 5mm x 11mm
                                      1x ProCon 22uF EY Series 105C (M) 5mm x ~11mm
                                      1x HEC 100uF 400 V ZT Series 105C CV34 18mm x 33mm

                                        Comment

                                        Previous template Next

                                        Related Topics

                                        Collapse
                                        • x_orange90_x
                                          Vizio E55-E1 bad backlights or bad inverter?
                                          by x_orange90_x
                                          I just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.

                                          I don't know how exactly to test the inverter itself. Is it...
                                          01-29-2025, 09:24 PM
                                        • Gentian
                                          APSINT3636VR 3600W APS INT Series 36V DC 230V AC Inverter/Charger schematic
                                          by Gentian
                                          I have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.

                                          It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a...
                                          03-06-2023, 07:07 AM
                                        • valvashon
                                          Insignia NS-LCD19-09 (PS OK, Inverter problem?)
                                          by valvashon
                                          For some reason I'm just not going to let this 19" TV defeat me. I guess because I have a schematic to work from I feel like I'm oh so close.

                                          History- while adding a turn-on circuit I let a small screw roll under the power board. Worked through all of that circuitry, probably replacing a MOSFET and PWM controller that were not bad but I was following the service manual. Finally figured out that the power supply is in working order when the inverter section (for the backlights) is disconnected. When the +12 supply to the inverter is disconnected the +12 and +5 will come up...
                                          1 Photo
                                          01-04-2024, 01:44 PM
                                        • eccerr0r
                                          A modified sine wave inverter + a grid tie inverter?
                                          by eccerr0r
                                          If I had a solar fed grid tie inverter (GTI), a modified sine wave inverter, and a power outage occurred, what would happen if you disconnected mains, backfed the modified sinewave inverter (MSI) into house power, and hooked up the GTI to the output of the MSI, would it work?

                                          Next thing is trying to charge the batteries using solar power, but that's another issue ...
                                          08-31-2023, 09:14 PM
                                        • caseyjay_48
                                          Sony KDL-46BX450 Inverter Troubleshoot Logic
                                          by caseyjay_48
                                          I am currently on a troubleshoot of 46” Sony KDL-46BX450 tv. I came back from Washington to Texas on medical emergency and had to leave all my tools up there. All I have is a couple of screwdrivers and a dvm. I wish to ask the community a troubleshooting question. Please forgive stupid questions as meds I am taking produce brain fog.
                                          I have well maintained Sony KDL-46BX450. It went black one day. After turn-on, I get solid green light and Sony logo in screen center for about 1-2 seconds, then black. No blinking LEDs, no hissing. Flashlight test shows screen characters dimly viewable,...
                                          09-23-2022, 08:08 PM
                                        • Loading...
                                        • No more items.
                                        Working...