Trouble finding an element on board!

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • smaniak
    Senior Member
    • Nov 2017
    • 80
    • Bulgaria
    #1

    Trouble finding an element on board!

    Hi guys.
    Recently, I troubleshot PC power supply, that was dead. It blows his fuse.
    The power supply is - SILVER POWER 650W - SP-SS650
    I change the fuse, Bridge Rectifier, Capacitator, Transistor and some other elements... Now it's turning ON without blowing fuse, but there is no low-voltage (5V, 12V ...)
    In this power supply, there is a board that I think is for switching ON low-voltage, and I want to see if the IC is OK, but I can't find what model is...
    IC p/n: U 98CN7DK UCC28515DW
    I put some pictures on the board and IC.
    Attached Files
    Tags: None
    • eccerr0r
      Solder Sloth
      • Nov 2012
      • 8698
      • USA
      #2
      Re: Trouble finding an element on board!

      Probably compatible with http://www.ti.com/product/UCC28515
      Looks like a multiple failure issue now... ensure you have APFC boost voltage and 5VSB at least before proceeding.

        Comment

        • smaniak
          Senior Member
          • Nov 2017
          • 80
          • Bulgaria
          #3
          Re: Trouble finding an element on board!

          So finally I have 5VSB, but I don't know what is this APFC boost voltage...

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: Trouble finding an element on board!

              Attached Files
              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

                Previous template Next

                Related Topics

                Collapse
                • 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
                • m1ch43lzm
                  HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                  by m1ch43lzm
                  Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                  Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                  05-12-2025, 08:37 PM
                • Document Archive
                  Surface Mount Fuses Fundamentals Datasheet
                  by Document Archive
                  TE Circuit Protection offers the widest selection of surface-mount fuses available for addressing a broad range of overcurrent protection applications. Helping to prevent costly damage and promote a safe environment for electronic and electrical equipment, our single-use chip fuses provide performance stability to support applications with current ratings from .5A up to 20A.

                  TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...
                  10-07-2024, 06:07 AM
                • sam_sam_sam
                  Heater element wire type instead of a fuse when troubleshooting a short circuit DIY
                  by sam_sam_sam
                  I was Ollie today which is a close out / surplus outlet store I do not go in there to often because you find things that you should not be tempted by but that is a another story

                  I saw a small space heater that used a wire type of heater element which I been looking for a while but not really hard mind you but when I saw this I grabbed it I going to go back tomorrow and buy the last one that is like the one I bought today because I need the heater element and the ceramic insulators and more of heat element wire because this one has two different wattage settings one 1300 watts ( tap...
                  12-16-2023, 08:39 PM
                • Hakuu
                  LG OLED77G1PUA - No Video / Audio after a TCON Board change and Software Update
                  by Hakuu
                  Hi There,

                  This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.

                  After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.

                  More Details

                  TV Model - LG OLED77G1PUA

                  Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt...
                  07-12-2023, 02:37 PM
                • Loading...
                • No more items.
                Working...