Panasonic TH-L37U20A no power (blown fuse)

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Buhoy
    New Member
    • Aug 2015
    • 4
    • Israel
    #1

    Panasonic TH-L37U20A no power (blown fuse)

    Hi,

    Got a Panasonic TH-L37U20A with a blown fuse. Replaced the fuse but it burned again.

    I troubleshoot the power supply and found 3 diodes with low reading. I was able to find a replacement for two of them but stuck with the third one.

    Attached a picture. It has a green band and brown body with the number 4 and 1 or i (not sure)

    Could you please help to identify?

    Thanks
    Attached Files
    Tags: None
    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia
      #2
      Re: Panasonic TH-L37U20A no power (blown fuse)

      What location on the board? Not sure if I can work it out .

        Comment

        • Buhoy
          New Member
          • Aug 2015
          • 4
          • Israel
          #3
          Re: Panasonic TH-L37U20A no power (blown fuse)

          Attached the board picture. Its the D7405.

          Found in google the following info:
          Ref.No Part No. Part Name & Description
          D7405 B0JAME000091 DIODE
          Attached Files

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia
              #4
              Re: Panasonic TH-L37U20A no power (blown fuse)

              yeah, that's about as far as I'm getting at the moment, the symbol in the schematic does not show zener symbol. keep digging you may get lucky

                Comment

                Previous template Next

                Related Topics

                Collapse
                • beetle1303
                  Carver CM-1090 - Power relay clicking on & off, then fuse blown after 20-30 seconds of power cycling.
                  by beetle1303
                  I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.

                  On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off...
                  3 Photos
                  01-13-2025, 08:49 PM
                • Babbar
                  Argon SA1 audio amplifier power-supply - fuse blown after fixing the short?
                  by Babbar
                  I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.

                  Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in....
                  04-12-2024, 01:12 AM
                • Tynan Dill
                  Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                  by Tynan Dill
                  I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                  Upon bringing it home and plugging it up, it showed a standby light.

                  I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                  The screen seems to blackout and stay black, but with a flashlight I can see the display.

                  With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                  Assuming...
                  ORIGINAL POWER SUPPLY BOARD
                  7 Photos
                  11-22-2024, 01:46 PM
                • PantherDave
                  Microsoft Surface Pro (5th gen) model 1796 - no power
                  by PantherDave
                  Hi all!

                  I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

                  I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
                  https://www.badcaps.net/forum/troubl...-hardware-devi...
                  05-29-2024, 02:01 PM
                • GLISIT
                  Asus Probook P5440UF-XB74 power issue
                  by GLISIT
                  Hi all,

                  TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


                  I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

                  A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
                  01-16-2025, 02:29 PM
                • Loading...
                • No more items.
                Working...