Techwood TWP 4205. Board: LJ44-00049A

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • speedypro
    Badcaps Veteran
    • Feb 2013
    • 561
    • United Kingdom
    #1

    Techwood TWP 4205. Board: LJ44-00049A

    Got this projection tv with no display. No Va, Vset and no 5V to YSUS board. Has anyone repaired this board before?

    No sign of damage on board. Board on internet seems expensive.
    Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: Techwood TWP 4205. Board: LJ44-00049A

      Projection? You mean plasma?

      Pic of power board?
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • speedypro
          Badcaps Veteran
          • Feb 2013
          • 561
          • United Kingdom
          #3
          Re: Techwood TWP 4205. Board: LJ44-00049A

          Originally posted by tom66
          Projection? You mean plasma?
          It is plasma but it's not a "TV" as in a full TV. cant explain it as I've never seen this before.

          Pic:

          Attached Files
          Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Techwood TWP 4205. Board: LJ44-00049A

              You have power light and standby?
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • speedypro
                  Badcaps Veteran
                  • Feb 2013
                  • 561
                  • United Kingdom
                  #5
                  Re: Techwood TWP 4205. Board: LJ44-00049A

                  Originally posted by tom66
                  You have power light and standby?
                  Yes. It also turns green when connected to its source. This source is like a receiver.
                  Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Techwood TWP 4205. Board: LJ44-00049A

                      See any pson or vson pins on power board?
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • speedypro
                          Badcaps Veteran
                          • Feb 2013
                          • 561
                          • United Kingdom
                          #7
                          Re: Techwood TWP 4205. Board: LJ44-00049A

                          No. None
                          Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

                            Comment

                            • vinceroger69
                              Badcaps Legend
                              • Mar 2012
                              • 6714
                              • uk
                              #8
                              Re: Techwood TWP 4205. Board: LJ44-00049A

                              good pic here showing the pinouts
                              http://www.shopjimmy.com/samsung-lj4...upply-unit.htm

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: Techwood TWP 4205. Board: LJ44-00049A

                                  Connector next to "SL"... Does that go to main board or another part
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

                                    • speedypro
                                      Badcaps Veteran
                                      • Feb 2013
                                      • 561
                                      • United Kingdom
                                      #10
                                      Re: Techwood TWP 4205. Board: LJ44-00049A

                                      See pic:

                                      Attached Files
                                      Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

                                        Comment

                                        • tom66
                                          EVs Rule
                                          • Apr 2011
                                          • 32560
                                          • UK
                                          #11
                                          Re: Techwood TWP 4205. Board: LJ44-00049A

                                          That's control board, then. Check the VS ON and PDP GO signals.
                                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                            Comment

                                            • speedypro
                                              Badcaps Veteran
                                              • Feb 2013
                                              • 561
                                              • United Kingdom
                                              #12
                                              Re: Techwood TWP 4205. Board: LJ44-00049A

                                              Originally posted by tom66
                                              That's control board, then. Check the VS ON and PDP GO signals.
                                              Should I get a voltage at VS ON? If so, no voltage. Those two fuses are ok. No voltage at any of those fuses.
                                              Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

                                                Comment

                                                • sachin
                                                  New Member
                                                  • May 2014
                                                  • 1
                                                  • india
                                                  #13
                                                  Re: Techwood TWP 4205. Board: LJ44-00049A

                                                  Originally posted by tom66
                                                  You have power light and standby?
                                                  board; LJ44-00049A

                                                    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
                                                    • 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
                                                    • jb_Bak
                                                      Sony xbr-65x900c main board issues?
                                                      by jb_Bak
                                                      Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.

                                                      Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
                                                      Power Board Connector that goes to Main board
                                                      CN6401
                                                      Pin 01 NC
                                                      Pin 02 NC
                                                      Pin 03 "BL_ON": 0V
                                                      Pin 04 "N/C"
                                                      Pin 05 "STBY 3.3V": 3.5V
                                                      Pin 06 "GND": N/C
                                                      Pin 07 "AC_OFF"...
                                                      09-27-2021, 04:52 PM
                                                    • Loading...
                                                    • No more items.
                                                    Working...