Hanns.G HG281 Component Identity

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • repairtec
    New Member
    • Feb 2009
    • 2
    #1

    Hanns.G HG281 Component Identity

    Hi can anyone identify the U7 semiconductor on the lower RHS of the graphics / interface board in a Hanns.G HG281 monitor it has the following markings on it. ( see photo )

    Logo CA
    84-33
    0713BL

    This part runs very hot and the display content disappears when hot. I guess it could be a V reg IC or Mosfet PWR transistor.

    Thanks in advance.
    Attached Files
    Tags: None
    • jetadm123
      Badcaps Legend
      • Feb 2010
      • 2169
      #2
      Re: Hanns.G HG281 Component Identity

      Might be a 1084-33 voltage regulator. The "33" indicates 3.3V output. Match the data sheet pinouts against your measurements.
      Last edited by jetadm123; 03-04-2012, 10:35 AM.

        Comment

        • newbie1
          Badcaps Veteran
          • Apr 2010
          • 269
          #3
          Re: Hanns.G HG281 Component Identity

          Hi,

          Have you recapped ALL the capacitors on the power board as well as the graphics board?

          Just to share that i encountered the identical monitor having image going off (blank screen) randomly with solid blue Power LED after warming up (30min-1hour). Recapped the Power board and it still behaves the same way. After only i recapped ALL the capacitors on the graphic/main board that the problem went away.

            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
            • ttmi100x
              HANNSG Hi221 -- 2 secs to black feat. CCFL flicker & "burn" marks on power board
              by ttmi100x
              Greetings everyone,


              I have a HANNSG Hi221 monitor that exhibits two seconds to black issues (backlight goes off, display is still on as confirmed by shining a flashlight on it) with some additional oddities...


              The monitor failed on me with a standard "2 seconds to black" some time ago prompting me to initially replace most of the electrolytic capacitors (some of them were bulging/leaking).
              Things kinda sorta worked for a night, then the problem returned along with some flickering and "buzzing" noises.

              Upon closer inspection...
              "Burnt" resistor
              6 Photos
              07-31-2024, 06:36 PM
            • howardc64
              TCL 55S425 few horizontal lines, potential failure on both side of panel/buffer board
              by howardc64
              All left and right refers to looking from rear of TV (or looking from front with TV upside down)
              • TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
              • Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
              ...
              07-24-2025, 05:17 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...