Help and question on Hitachi P50H4011 P50H401

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Yannick99
    Member
    • Nov 2018
    • 11
    • Canada
    #1

    Help and question on Hitachi P50H4011 P50H401

    Hi,

    i'm fixing an old Hitachi P50H4011. The upper buffer is defective. If i unplug this one, i can see the bottom picture but with some strange corors. See picture. So i'd like to know if the problem is only the upper buffer of there are other problem ? What do you think ?
    Attached Files
    Last edited by Yannick99; 11-08-2018, 03:49 PM.
    ______________________________
    https://www.instructables.com/member...instructables/
    Tags: None
    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: Help and question on Hitachi P50H4011 P50H401

      Looks like you may have a Z-Sus Bd issue as well. Change out the bad Buffer for a new one and get the whole screen going then we can go from there.

        Comment

        • Yannick99
          Member
          • Nov 2018
          • 11
          • Canada
          #3
          Re: Help and question on Hitachi P50H4011 P50H401

          Originally posted by Andrew F. Ali
          Looks like you may have a Z-Sus Bd issue as well. Change out the bad Buffer for a new one and get the whole screen going then we can go from there.
          thank you i'll do that
          ______________________________
          https://www.instructables.com/member...instructables/

            Comment

            • Yannick99
              Member
              • Nov 2018
              • 11
              • Canada
              #4
              Re: Help and question on Hitachi P50H4011 P50H401

              Hi, i replaced upper buffer board and replaced psu bad capacitor. Now tv is working but picture interlaced... I reseat 5 times the upper buffer board just in case. Same problem. Any idea ?
              Attached Files
              ______________________________
              https://www.instructables.com/member...instructables/

                Comment

                • Yannick99
                  Member
                  • Nov 2018
                  • 11
                  • Canada
                  #5
                  Re: Help and question on Hitachi P50H4011 P50H401

                  anyone ?
                  ______________________________
                  https://www.instructables.com/member...instructables/

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • 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
                    • howardc64
                      A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
                      by howardc64
                      Problem

                      This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
                      08-04-2024, 10:36 PM
                    • spleenharvester
                      Whirlpool PACF212HP W portable air conditioner, upper fan only turns slowly.
                      by spleenharvester
                      I just acquired this portable aircon, history unknown. Its behaviour is quite strange:
                      • When turned on and placed into cooling mode, the upper fan (cold air out) just spins slowly. The compressor and lower fan do not run.
                      • If the device is then placed into heating mode and then back into cooling mode, the lower fan and compressor kick in and start cooling, but the upper fan still only spins slowly.
                      • If the device is placed into fan-only mode, the upper fan does not respond to low/medium/high speed toggles - just keeps running slowly.
                      • Display and buttons all behave normally aside from the
                      ...
                      06-27-2025, 07:49 PM
                    • Yanleb
                      Schematic or datasheet for Plasma TV buffer chip
                      by Yanleb
                      Hi all,

                      I'm interested in understanding how a buffer board chip is working. I know there's about 90 outputs per chip to the plasma panel, but I'm more interested to know about the input pins. I guess that some of them are address pins, but I want to know more.

                      So far I've found nothing at all. I haven't found any datasheet about the various buffer chips, and I haven't found any schematic for the buffer board using them (Y Buffer Board in Samsung's terminology).

                      Any information will make me happy. It can be from any buffer chip or plasma TV manufacturer....
                      05-18-2022, 01:36 PM
                    • ngth82
                      TH-42PX75U upper Y-buffer source?
                      by ngth82
                      Hey guys -

                      I have a Panasonic TH-42PX75U with bad upper Y-buffer - TNPA4184

                      Anyone know of a good source other than eBay (at ~$60-$70 bucks) or ShopJimmy (out of stock)? I picked up the unit for free. The upper half of the screen is black. The lower half works. Smells like a bad upper Y-buffer to me.

                      I'm going to pull the upper Y-buffer and ohm it out. Just trying to find a good source before i spend too much time on this unit.

                      Thanks!
                      -Thomas...
                      06-02-2018, 05:01 PM
                    • Loading...
                    • No more items.
                    Working...