Brown Stuff on magnavox 42mf231d

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • gorr35
    Senior Member
    • Nov 2010
    • 127
    #1

    Brown Stuff on magnavox 42mf231d

    Can someone tell me what this brown/caramel colored stuff is at the bottom of my power supply board? It looks like burns, but I was thinking that it's a special coating they put on the circuit boards? Ignore the blurriness in the photos....just was trying to give an idea of what i'm talking about. It covers almost the whole board but mainly just around the solder points.
    Attached Files
    Tags: None
    • mxslick
      Motocross Racer
      • Oct 2010
      • 19
      • USA
      #2
      Re: Brown Stuff on magnavox 42mf231d

      It's left-over soldering flux residue. It can be cleaned off without too much difficulty. I used to use denatured alcohol to clean boards.

        Comment

        • cadillacman
          Badcaps Veteran
          • Feb 2011
          • 524
          #3
          Re: Brown Stuff on magnavox 42mf231d

          acetone and a toothbrush works well too. Its super flammable though and melts plastic, so be careful where you use it.

            Comment

            • Tvbob
              tvbob
              • Dec 2009
              • 204
              #4
              Re: Brown Stuff on magnavox 42mf231d

              Board wasn't cleaned well during the manufacturing process.
              don't worry about it, won't cause you any prolbems.

                Comment

                • Tvbob
                  tvbob
                  • Dec 2009
                  • 204
                  #5
                  Re: Brown Stuff on magnavox 42mf231d

                  OOPS, (problems)

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • tonybig10
                      Magnavox MDR515H/F7 And Magnavox MDR537H/F7
                      by tonybig10
                      Hi is any one can help me on getting the Schematics for Magnavox MDR515H/F7 And Magnavox MDR537H/F7 PDF file thank you I really appreciate it. Just need to change some component on
                      the main board and the power supply board. I looked all over for the internet and I cannot find the Schematics sheet for both of them. I don't know where else to look I hope someone can help me...
                      03-07-2025, 01:03 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
                    • harp
                      ATX brown wire sense range
                      by harp
                      I thinking to modify some ATX ver 1 supply, and wonder what if I connect 10k pot on 12v and center tap on brown wire? What range of 3.3v correction can to expect, or something will blow up if I close to rails, leave narrow 3.3v range?

                      It is KA7500B ic, but 3v3 sense is connected to TL431, I am not sure there is any connection between.
                      05-16-2024, 05:44 PM
                    • alejotesone
                      I need BIOS bin file for ken brown iris iT102a1-v01
                      by alejotesone
                      hi i need bios for ken brown iris iT102a1-v01 pleace! vinafix have this bios, no same brand is required

                      thanks so much!!
                      09-26-2023, 03:06 PM
                    • sudz28
                      Magnavox 27MS5402/17 CRT - no picture, flashing green light
                      by sudz28
                      I'm going to assume my beloved Magnavox CRT is toast, but also figured maybe this was a good opportunity to dip my toes into he circuitry waters and maybe learn something new. Also, I don't want to trash it if it's a fairly cheap/easy fix!

                      My 20-year-old Magnavox has gotten me and my kids through many a gaming console change and worked great up until the other day. Following a long distance move, it sat in our garage for a year and now that I brought it in and turned it on I get no picture; instead, a green light blinks on the front of it; 7 flashes, one long flash, then 3 more...
                      02-08-2022, 10:09 AM
                    • Loading...
                    • No more items.
                    Working...