Emerson LC401EM2F

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #21
    Re: Emerson LC401EM2F

    SA1601 is OK so the fuse is not seeing a dead shorts. How are the the Diode second set of the rectifier (D1607~1609)?
    "c1612 on my blue esr meter it shows .33 in the board and on my dmm on the 20M setting it starts at 2.2 and then goes down" how far down does it go down to?
    Last edited by budm; 11-30-2012, 10:03 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

    • Mark369
      Senior Member
      • Jul 2009
      • 163

      #22
      Re: Emerson LC401EM2F

      would it only be a short to ground that would make the main fues blow?

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: Emerson LC401EM2F

        Shorts between rails would also blow the fuse, but they are rarer.
        Shorted diodes could do it sometimes.
        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

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #24
          Re: Emerson LC401EM2F

          I would use a 100W lamp place in place of the fuse to see if it glows brightly (no need to turn the power switch on).
          Or make one like this:
          http://s807.photobucket.com/albums/y...t=DSC01681.jpg
          http://s807.photobucket.com/albums/y...t=DSC01682.jpg
          http://s807.photobucket.com/albums/y...t=DSC01679.jpg
          Last edited by budm; 11-30-2012, 02:52 PM.
          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

          • Mark369
            Senior Member
            • Jul 2009
            • 163

            #25
            Re: Emerson LC401EM2F

            so would i be looking for a short on the hot side only or anyware on the board

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #26
              Re: Emerson LC401EM2F

              Both sides since you may also have bad rectifiers, MOSFET, etc. Did you try using lamp yet?
              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

              • Mark369
                Senior Member
                • Jul 2009
                • 163

                #27
                Re: Emerson LC401EM2F

                no have to get some stuff to set it up.
                I had one fuse laying around and just tryed it and opened as soon as i pluged it in.

                fuses 3.00 a pop.

                Comment

                • Mark369
                  Senior Member
                  • Jul 2009
                  • 163

                  #28
                  Re: Emerson LC401EM2F

                  oh yea and i tested on cold side ground to jumper wire J1114 labled RL + 5.0V and there is 47.2 ohm to ground if that means any thing. J1114 is connected to R1214 and D1215.
                  i know D1215 is with the relay RL1201 would that make it look shoted.

                  Thank you for your time. will post back soon.

                  Comment

                  • Mark369
                    Senior Member
                    • Jul 2009
                    • 163

                    #29
                    Re: Emerson LC401EM2F

                    https://www.badcaps.net/forum/showth...rson+lc401em2fI read this post before I started this one.

                    It's the same board same every thing. this tv is only 12 months old.

                    so you could use his pics same board no damage can be seen not even heat spots.

                    Comment

                    • Mark369
                      Senior Member
                      • Jul 2009
                      • 163

                      #30
                      Re: Emerson LC401EM2F

                      any one know if im on the right track?

                      Comment

                      • Mark369
                        Senior Member
                        • Jul 2009
                        • 163

                        #31
                        Re: Emerson LC401EM2F

                        Bump

                        Comment

                        • Mark369
                          Senior Member
                          • Jul 2009
                          • 163

                          #32
                          Re: Emerson LC401EM2F

                          anyone?

                          Comment

                          • Mark369
                            Senior Member
                            • Jul 2009
                            • 163

                            #33
                            Re: Emerson LC401EM2F

                            I think that it has a shot on 5.0v rail to ground but not sure how to find it yet.

                            I have a muilt-meter and a blue esr meter i have a 15Mhz scope but i don't know very much about the scope on how to use. don't think i could use it if there is no power on the board anyways.

                            could some one give me a hand to find short.

                            thanks and mary christmas to all

                            Comment

                            • Mark369
                              Senior Member
                              • Jul 2009
                              • 163

                              #34
                              Re: Emerson LC401EM2F

                              I removed sa1601 and it looks like it's open no readings on diode setting or on any other setting
                              I removed d1201 to d1204 all ok.

                              I still think there is a short on 5v rail to ground but would like some help finding it

                              Comment

                              • Mark369
                                Senior Member
                                • Jul 2009
                                • 163

                                #35
                                Re: Emerson LC401EM2F

                                Maybe q1201 or q1202

                                Comment

                                • Mark369
                                  Senior Member
                                  • Jul 2009
                                  • 163

                                  #36
                                  Re: Emerson LC401EM2F

                                  Attached Files

                                  Comment

                                  • Mark369
                                    Senior Member
                                    • Jul 2009
                                    • 163

                                    #37
                                    Re: Emerson LC401EM2F

                                    I was checking things and found I have short on pins of T1201 its like pins 5, 6, 7, 9, 10 are all connected together and pins 1, 2, 3, 4 all connected together. I have not removed yet to retest.

                                    IC1201 (MIP2F30MSSCF DIP7-A1) same thing pins 5, 7, 8 all connected? pins 1 to 4 all connected? short on c1208?
                                    have not removed yet to retest. found datasheet but not in english.

                                    how would i check the transformer and no i don't have a ring tester
                                    Last edited by Mark369; 12-21-2012, 11:02 PM.

                                    Comment

                                    • Mark369
                                      Senior Member
                                      • Jul 2009
                                      • 163

                                      #38
                                      Re: Emerson LC401EM2F

                                      i must be on my own now no on saying anything last 10 post all mine

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #39
                                        Re: Emerson LC401EM2F

                                        OK, we need to start isolate the circuits to find out which section is shorted out, let try removing the Q601 (2SK3798) on page 3. You should use the lamp (100~200w) in place of the fuse so you will not keep blowing fuses and cause more damages.
                                        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

                                        • kevinm34232
                                          Badcaps Legend
                                          • May 2012
                                          • 1884
                                          • USA

                                          #40
                                          Re: Emerson LC401EM2F

                                          bud with that lamp tester you have, did you have to make the box with the lamp holder and on/off switch, or did you buy it like that?

                                          Comment

                                          Related Topics

                                          Collapse

                                          • corrize
                                            A funny fuse story – Lumix LX100 II
                                            by corrize
                                            Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
                                            I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
                                            The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
                                            There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
                                            And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping...
                                            10-19-2023, 09:58 AM
                                          • jesterace
                                            Samsung UE46ES8000 Blown fuse but no other signs of short
                                            by jesterace
                                            Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the...
                                            09-11-2024, 03:14 PM
                                          • jshhh
                                            Help replacing fuse on my Mimaki CJV300-160 vinyl printer
                                            by jshhh
                                            Hi guys,

                                            I'm inexperienced with electronics repairs, I've done a little bit of soldering caps and whatnot, but i have a blown fuse on this mimaki printer I got which I have bought a replacement for.

                                            How do I remove this type of fuse (see picture)...it kinda looks like it would pull out of that bracket but it didn't come at first pull and I didn't want to brute force it incase it's soldered on there like most of the rest of the components.

                                            Anybody know how to remove this type of fuse?

                                            (The fuse is toward the bottom of the image labeled F2)...
                                            06-17-2025, 01:35 AM
                                          • Babbar
                                            Argon SA1 audio amplifier power-supply - fuse blown after fixing the short?
                                            by Babbar
                                            I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.

                                            Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in....
                                            04-12-2024, 01:12 AM
                                          • drykid
                                            Matsui 175S microwave fuse replacement
                                            by drykid
                                            Hi,

                                            I recently picked up a used Matsui 175S microwave that was powering up (starts, turntable rotates) but not heating. From looking online the most likely culprit was the fuse, but unfortunately in this one the fuse had heated up and fused with the (badly designed) fuse holder and couldn't be removed. I guess this might indicate further issues beyond the fuse itself but at this stage I just want to replace the fuse and see how I go from there.

                                            Anyway since I couldn't get out the fuse itself the easiest fix was to replace the fuse holder assembly that runs between the...
                                            12-21-2020, 01:15 PM
                                          • Loading...
                                          • No more items.
                                          Working...