Sanyo DP42828

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Nama
    Senior Member
    • May 2009
    • 127
    #1

    Sanyo DP42828

    This 42" Sanyo is giving me some shit. Has the 2S2B problem. I can't seem to find anything wrong with it or am looking in the wrong place. I need to figure out this ESR meter also, Can I test ESR while the Cap is still on the board or do I need to remove a leg?.

    Thanks

    Here are the boards, Any suggestions would be nice









    Attached Files
    ^Learning to walk on rice paper without leaving a trace,
    Tags: None
    • Nama
      Senior Member
      • May 2009
      • 127
      #2
      Re: Sanyo DP42828

      Not sure if it means anything but when I unplug the right inverter and push the power button nothing happens

      With the right plugged in I get 2 s 2 b
      ^Learning to walk on rice paper without leaving a trace,

        Comment

        • Nama
          Senior Member
          • May 2009
          • 127
          #3
          Re: Sanyo DP42828

          I just noticed one of the 2 transformers has a burn mark on the side. So I will try to hunt one down.

          Looks like I'm ordering a ring tester this week
          ^Learning to walk on rice paper without leaving a trace,

            Comment

            • kc8adu
              Super Moderator
              • Nov 2003
              • 8832
              • U.S.A!
              #4
              Re: Sanyo DP42828

              get the "blue esr kit"
              btw i have seen several of those transformers go bad.
              http://www.lcdparts.net/Transformer3D.aspx

                Comment

                • Nama
                  Senior Member
                  • May 2009
                  • 127
                  #5
                  Re: Sanyo DP42828

                  nice site, I already have the blue esr meter, just need to figure out how to use it correctly. I'm ordering the Ring Tester
                  ^Learning to walk on rice paper without leaving a trace,

                    Comment

                    • PlainBill
                      Badcaps Legend
                      • Feb 2009
                      • 7034
                      • USA
                      #6
                      Re: Sanyo DP42828

                      Originally posted by Nama
                      This 42" Sanyo is giving me some shit. Has the 2S2B problem. I can't seem to find anything wrong with it or am looking in the wrong place. I need to figure out this ESR meter also, Can I test ESR while the Cap is still on the board or do I need to remove a leg?.

                      Thanks

                      Here are the boards, Any suggestions would be nice
                      You can check the ESR of a cap while it is still in the board. However, it is important that you pay attention to the circuit connections. Many power supplies use several identical capacitors in parallel. If you are measuring one of those caps, you are actually measuring the aggregate ESR. For example, you are measuring a capacitor with an ESR rating of .2 ohms; you read .1 and conclude it is good. However, it is in parallel with three others. A set of four good capacitors in parallel should read less than .05 ohms, so at least two of these capacitors have a high ESR. The good news - this is rare. And on monitor power supplies it is easy to see if multiple capacitors are parallel.

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                        Comment

                        • kc8adu
                          Super Moderator
                          • Nov 2003
                          • 8832
                          • U.S.A!
                          #7
                          Re: Sanyo DP42828

                          i meant the blue ringer. duhhhhh!!!
                          get the kit and assemble it yourself.

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • EazyBone
                              Vizio V705-H3 Won't power up
                              by EazyBone
                              This TV has the white light on the front. When you click the power button or hit the remote nothing happens the lights stays solid. I checked the main board for the voltage for that signal and everything is fine.

                              The power supply is giving 13 volts and 2.7 on AC detection. Zero on PSOn and nothing changes when hitting power. The led lines show zero and those caps won't turn on
                              ​​​​​​ it seems the PSU won't turn on to supply voltage to LEDs. The main caps sit at 170v.

                              It's odd to me the led lines go from PSU to main board and THEN to LEDs.. as a note....
                              03-01-2025, 01:34 PM
                            • sam_sam_sam
                              Mitsubishi CNC switching power supply board dead / relay board bad diode failure
                              by sam_sam_sam
                              I was working on this CNC machine today found no keyboard functioning no control relay powering on
                              The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board

                              Found shorted diodes on main controller relays there are 3 of them that...
                              01-07-2023, 05:43 PM
                            • Topcat
                              Dell XPS 8950 Power Issue
                              by Topcat
                              A few months out of warranty and it's dead as a fart. XPS 8950 with a 12th Gen I5, 32gb DDR5 RAM and a GTX1650 GPU.....

                              Symptoms it's giving are really making a coin toss between bad motherboard and bad PSU....I'm leaning toward motherboard, but there are some strange irregularities with this piece of shit system.

                              Basic test:
                              Upon connecting power cord, system powers on by itself (no button push) for a second then powers down...and then powers back on again, I hear a relay trip inside the PSU, and then powers down again and that's it. It won't do anything else....
                              01-02-2024, 05:51 PM
                            • cj_reha
                              Mystery 80s Sanyo cap - perhaps polymer?
                              by cj_reha
                              Hey all I've been working on a 1984 Sanyo 27" color TV which had a smattering of bad caps in the video switching circuit. I found this oddball little 1uF 25V cap which looks to me like an early polymer, but I can't find concrete info proving it. I know Sanyo was a big player in early polymer cap development and this is the time period where they were just getting on the market, so I'm wondering if anyone has crusty old datasheets that could help identify it and determine if my suspicions are right? It has the same epoxy end seal and font/formatting as some old stock Os-Cons I've got laying...
                              01-06-2023, 09:24 AM
                            • coinwizx
                              Burned out PSU Corsiar HX1200 and NZXT C850, connected to wrong Molex/Sata cable from EVGA.
                              by coinwizx
                              Hi,
                              Anybody has experience repair PSU burned out due to connect to EVGA molex/sata cables. I know the cable is not compatible (i got them mixed up), but I though i can connect it and use a PSU tested to find out which is the wrong sata/molex cables. As soo as I pluged in the powered molex cable to the PSU tester, the power supply short out, and will not turn on anymore. After the incident, the PSUs (both HX1200 and C850) try to power on and shut itself off immediately. The ATX PSU tester survice the short circult, still working perfectly. Anybody know if it's an easy fix or know which parts...
                              09-09-2025, 03:11 PM
                            • Loading...
                            • No more items.
                            Working...