Neovo F-419 inverter transformer blown

Collapse
X
Collapse
+ More Options
Posts
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • LaurieY
    New Member
    • Sep 2012
    • 1
    • Spain
    #1

    Neovo F-419 inverter transformer blown

    I have a Neovo F419 in which one of the transformer secondaries is OC.
    The device is labelled
    DG100016500
    LSE1147A

    The schematic shows it as EEA-17 There are some EEA-17's on ebay one as EEA17-HC the other as EEA-17-AE. I can't find datasheets
    I see that others have had this (thread 240213). Any idea what difference between the two (-HC and -AE) I don't want to blow anything else.

    There are no dodgy looking capacitors but the 12V line is running at about 14.5V does this indicate a problem?

    Thanks
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Neovo F-419 inverter transformer blown

      Originally posted by LaurieY
      Any idea what difference between the two (-HC and -AE) I don't want to blow anything else.
      No.

      There are no dodgy looking capacitors but the 12V line is running at about 14.5V does this indicate a problem?
      Most lcd power supplies are unregulated. Once a load (like the inverters turning on) is applied it will be closer to 12V.
      --- 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

        Previous template Next

        Related Topics

        Collapse
        • notallbad
          Sony Cmt-cp33md power transformer blown
          by notallbad
          Power transformer has open circuit on the 230v primary side, its tapped for 115v too which is also open so most likely the thermal fuse has blown. It doesnt look like it would be possible to open it up to check the thermal fuse so looking to replace.
          What are peoples thoughts on repair?
          replace the one transformer with 2
          replace like for like, though unlikely to find a direct replacement...
          01-22-2023, 03:47 PM
        • reessi
          Imac A1312 - Blown Diode, Need Inverter Schematic?
          by reessi
          iMac 27-Inch "Core i7" 3.4 (Mid-2011):

          First off I have the Imac Schematic but only for the mainboard, does anyone have the inverter one or a similiar one from another for better understanding?

          Searched all over for one!

          All voltages to the Inverter are correct:

          (12v in, 3.3v Enable and PWM Approx 3.0v).

          Output was 12v and moved a little but Inverter was obviously cutting off as D1 was SHORTED.

          After replacing this the IMAC works for 1 week exactly and dies again. When working the output was correct...
          12-04-2020, 06:58 AM
        • Hounddoghill
          DPS285BP 5v standby transformer blown
          by Hounddoghill
          Sharp TV LC-80LE633U
          Power supply board DPS 285BP Run TKB096WJQZ

          Standby transformer markings (attached picture)
          MP-130I(01)
          AV-DP11153 Delta
          Dcum 1244(03) H6P

          So an event in the primary exploded the cap (C7901)on pin one of the Standby circuit IC. So after replacing a couple diodes a the 2.2ohm resistor(fuse) I found the transformer inputs are open.

          Anyone know about replacements for this transformer?
          I suspect the original is not available.
          https://www.badcaps.net/forum/images/smilies/silly.gif
          ...
          02-04-2022, 03:22 PM
        • ohren
          Original Xbox 1.0 PSU: Foxlink FTPS-0002 Rev. B. — 12 V low, 5 V high — transformer?
          by ohren
          Hello!

          I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.

          Measured voltages with no load:

          After rectifier diodes
          12V: 6.17 V
          5V: 5.67 V

          Secondary transformer pins AC measurement (really don't know if this says anything)
          12V: 2-2.5 V
          5V: 1.04 V


          I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,...
          03-18-2023, 10:33 AM
        • cmlewis89
          LG 47LB5DF blown power supply board
          by cmlewis89
          Hi folks,

          I'm new to this forum. So my trusty 17-year-old LG 47" LCD recently died. As I was booting it up, I heard a hum followed by a loud bang, sounds of pieces flying around, and loss of power to the unit. Inspecting the PSU, I saw two obvious problems: a blown thermistor (bang + flung pieces) and a visibly bulging main cap. Inspecting as many components as I could with my Fluke MM, I diagnosed that the following components on the "hot side" of the board were also bad: one of the 2 main MOSFETs, main 8A fuse, small cap (25V 47uF) connected to main caps, and a blown...
          12 Photos
          09-03-2024, 07:50 PM
        • Loading...
        • No more items.
        Working...