Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Pauldesign
    Member
    • Apr 2013
    • 49
    • South Africa

    #1

    Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

    Hi All,

    I've got a faulty Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 Rev A. Some of the components are blown and can measure or read resistors R809 and R813 values.

    I'll like to know if someone can please upload the schematic or picture of the bottom side or please tell me what the components values of resistors R809 and R813 are?

    I've searched for the schematic to no avail; besides finding a IPLI-024 schematic which doesn't correlate with some of the components on the IPLI-176 board.

    I've also tried to zoom-in on photos of IPLI-176 PSU boards i found on the forum but can't really make out both components values as both pictures values doesn't seems identical. I've got some presumptions in mind (don't wanna reveal) but i need confirmation.

    Thanks alot
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

    There should be a barcode sticker on the board with BNXXXXXXX numbers printed on it.
    Post good clear pictures of the board.
    Is this the version you have?
    http://s807.photobucket.com/user/bud...?sort=3&page=1
    Last edited by budm; 04-07-2014, 11:13 AM.
    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

    • Pauldesign
      Member
      • Apr 2013
      • 49
      • South Africa

      #3
      Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

      Hi Budm

      Thanks for the feedback.

      Well, the blown resistors values can't be reliable identified since the marking almost wiped out and too blur, especially R813; therefore, i find it unnecessary to send photos of the actual PSU (well, except you have some sort of supervision )

      However, attached are photos of the identical PSU (which i got from the forum and the link you mentioned).

      The pics named R809_from_a_IPLI-176 are the outcomes (which doesn't seems identical!) of R809 on two different pics of IPLI-176 psu boards.

      I hope the above helps a bit, if not confusing.

      Thanks
      Attached Files

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

        Well, I will look and see if I save one of this board from broken monitor.
        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

        • Pauldesign
          Member
          • Apr 2013
          • 49
          • South Africa

          #5
          Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

          That will be great Budm!

          By the way, the PSU board name is ILPI-176 Rev A and not IPLI-176Rev A as was written. My apologies for the typos (copy and paste!).

          The badcode or serial number you requested is H 793341 400600R

          Attached are photos of (i) the board under-repair (some blown components removed) and (ii) interested components.

          I could've uploaded clear photos of the specific spots/resistors but my current phone camera can't zoom-in nor produce high quality photos.

          While we're on this, can you please as well confirm whether suitable replacement for the pwm chip (OnSemiconductor NCP1337) could be Fairchild FL6300A.[/B]

          Perhaps, it might come in handy in future, just in case.

          Looking forward to your soonest feedback and thanks for the assistance so far.
          Attached Files

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

            Well. I looked through my spare boards bins and could not find the board, sorry.
            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

            • lti
              Badcaps Legend
              • May 2011
              • 2547
              • United States

              #7
              Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

              This might have a schematic:
              http://elektrotanya.com/samsung_2333.../download.html
              I didn't download it, so I don't know if it will help.

              Comment

              • Pauldesign
                Member
                • Apr 2013
                • 49
                • South Africa

                #8
                Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

                Thanks Budm for your time.

                Thanks Iti for the link; but i did come across that a while ago and is more like user manual. There isn't any schematic of the PSU, besides a block diagram.

                Well, i have nothing more to loose, i'll go for 20 Ohms for R813 and for 1K for R809 and if it doesn't do the trick, i'll have both values.

                Regards

                Paul

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

                  That R809 is the current sensing resistor which measures the voltage drops of the Source resistor R815, typical value will be around 1K. You can look up the application notes of that SMPS IC.
                  Did the MOSFET get damaged? That may be the reason that resistor R809 and the Gate drive resistor R813 (typical is 10~100 Ohms) are damaged, you should replace that IC 802 also otherwise you may blow up the new MOSFET. Check R815 also.
                  Last edited by budm; 04-14-2014, 11:06 AM.
                  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

                  • Pauldesign
                    Member
                    • Apr 2013
                    • 49
                    • South Africa

                    #10
                    Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

                    I'm not in contact with the ILPI-176 PSU board at the moment.

                    However, if i can remember correctly, the following known components were tested damaged: I've forgotten the component reference designations number.

                    - The PWM chip
                    - The Power MOSFET -- 2761I
                    - The 2W 0.43R (the short circuit resistor on the top layer of the board)
                    - R809
                    - R813

                    Regards Budm

                    Comment

                    • Pauldesign
                      Member
                      • Apr 2013
                      • 49
                      • South Africa

                      #11
                      Re: Samsung Syncaster 2333 LCD with faulty PSU : IPLI-176 blown resistors value

                      The included link is the closest representation of the ILPI-176 schematic i've come across. Although it differs slightly but it' s good enough to chance on.



                      Included as well is the datasheet of the PWM chip, with so-called typical application schematic with little or no component values nor formulars to compute them in that regards.

                      https://cdn.badcaps-static.com/pdfs/...f457e2054a.pdf


                      However, the NCP1337 application note enlightens a bit.




                      But still, some of these semiconductors manufacturers should learn from Texas Instrument on how to do device schematics and appliaction note. How do they expect users to easily determine those values, besides thumb sucking them?

                      Anyways, I think i'm armed with enough info to un/smoke the PSU board now

                      Will feedback, if i made it in one piece

                      Comment

                      Related Topics

                      Collapse

                      • reessi
                        20v / 2A SMPS for a Battery Charger - Explanation of Blown Resistors Please..
                        by reessi
                        Hello,

                        My friend asked me to replace the wire going from this SMPS 20v adapter to the charger for a 18v Lithium Battery for a drill.

                        The cable had frayed and been touching, as a result the 5 Paralleled R200 (0.2 ohm) resistors had blown O/C, they are connecting the main -ve rail to the output wire.

                        The output was jumping around 13v and dis-appeared when a load like the charger was connected, they measured 900ohms.


                        I experimented by replacing at first a single 0 ohm and then a 2.2ohm in and the output was restored at 21.62v and 21.65v respectively...
                        08-22-2024, 08:12 AM
                      • Widget
                        Blown heated blanker controller. Trying to figure out these smd resistors
                        by Widget
                        Hello,

                        We have one of those heated throw blankets you plug into AC power. The other day it went *bzzzbzzzbbzz... pop*, so I opened it up to find what appears to be two resistors gone *poof*. (R7 & R14 in picture)

                        luckily, we have a second blanker with what appears to be identical controller, so I opened it up to take a picture

                        According to the good controller PCB, R7 = 9531, & R14 = 103

                        Online SMD resistor calculator says

                        R7 - 9531 = 95.3kohm
                        R14 - 103 = 10kohm

                        Is this correct? Would all I need is a 10k...
                        06-30-2024, 11:22 AM
                      • TinkerTron
                        Schematic vs. Reality: Where Are the Resistors on My Sharp Clock Radio? Model FY-70CH
                        by TinkerTron
                        Hey everyone,

                        I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.

                        Instead, here's what's been bugging me so far:
                        The schematic...
                        03-06-2025, 02:03 PM
                      • gurj1979
                        Medion Erazer X15803 - blown resistors
                        by gurj1979
                        Hi folks.
                        I have a Medion Erazer X15803 with board number MBPGK7CP7C-SN12 (no schematics on the internet) which uses Monolith Buck Converter MP2949A for CPU power. It has 2 burnt out resistors.
                        R332 is missing the solder tabs so I cant even get any reading from it.
                        R330 shows 5ohm.1

                        What are the values of these 2 resistors ?
                        Image attached.

                        Thanks....
                        08-23-2022, 05:00 PM
                      • cmlewis89
                        LG 47LB5DF blown power supply board
                        by cmlewis89
                        Hi folks,

                        I'm new to this forum. So my trusty 17-year-old LG 47" LCD recently died. As I was booting it up, I heard a hum followed by a loud bang, sounds of pieces flying around, and loss of power to the unit. Inspecting the PSU, I saw two obvious problems: a blown thermistor (bang + flung pieces) and a visibly bulging main cap. Inspecting as many components as I could with my Fluke MM, I diagnosed that the following components on the "hot side" of the board were also bad: one of the 2 main MOSFETs, main 8A fuse, small cap (25V 47uF) connected to main caps, and a blown...
                        09-03-2024, 07:50 PM
                      • Loading...
                      • No more items.
                      Working...