LE32B550A5P eeprom reset

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • nogger
    Senior Member
    • Aug 2010
    • 190

    #1

    LE32B550A5P eeprom reset

    Hi all, i have done a few of these EEPROM resets on Samsung Tv's but i have been sent an AV board from a LE32B550AP (from France) & it doesn't seem to have the eeprom on the back of the board as normal. Anyone know where & which IC it is on this set.

    The AV board numbers are (from the label on the tuner): BN94-02693T

    I believe it's the Chelsea/Arsenal Chassis

    Any help appreciated

    Regards
    Nogger
    Last edited by nogger; 06-25-2014, 11:45 AM.
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: LE32B550A5P eeprom reset

    a picture might help otherwise google the part numbers?
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • nogger
      Senior Member
      • Aug 2010
      • 190

      #3
      Re: LE32B550A5P eeprom reset

      Will post some pics tomorrow when i'm back at the bench.
      Just thought someone may have worked on this before & remeber where it's at.

      There isn't the usual IC1803 eeprom on the back side of the board but there's a coupel of Atel chips on the top side, question is which is which & i couldn't find the S/Manual for this on my usual download sites (Elektrotanya etc).

      Nogger

      Comment

      • nogger
        Senior Member
        • Aug 2010
        • 190

        #4
        Re: LE32B550A5P eeprom reset

        I have attached a couple of pics of the board. There are 3 Atmel eeproms that i can see on the top side of the board & i have circled them in red.

        Google comes up blank for me, any ideas anyone ?

        Graham
        Attached Files

        Comment

        • selldoor
          Slow Learner
          • Dec 2010
          • 7870

          #5
          Re: LE32B550A5P eeprom reset

          cant rad the part numbers - if you can see them this might help
          http://www.atmel.com/v2PFResults.asp...ategory:'36267[33169]',pm:!((i:8296,v:!n),(i:8329,v:!n),(i:8335,v:!n),(i:8390,v:!(0,1,2,3,4,5)),(i:8378,v:!n)),view:list),sc:1)
          Please upload pictures using attachment function when ask for help on the repair
          http://www.badcaps.net/forum/showthread.php?t=39740

          Comment

          • grumpy_one
            New Member
            • Sep 2015
            • 7
            • australia

            #6
            Re: LE32B550A5P eeprom reset

            It seems unlikely that you are still looking for an answer 2 years later, but I may have one in case any history buff looks at this thread in the future. Here is a picture of part of the main board of a Samsung LA40B650T1FXXY. The EEPROM you need to replace is marked ATMLH902:

            As you can see, it is in the expected and logical place, right beside the main processor, and close to the master copy of the firmware (the IC with the white sticker giving the original firmware type number). It is also inside the rectangle around the main processor, and is one of the possible candidate chips you had identified.

            In case it is any help, I'll outline my history with regard to that EEPROM on the LA40B650 in the attached photograph. I was given the TV with a couple of problems: a failed AR15-U on the T-Con board, and also instability in the setup, which frequently changed when the TV was rebooted. After replacing the T-Con board (my inept attempts to replace the AR15 were unsuccessful after half a dozen tries) I focused on the EEPROM to fix the instability. I fitted a new blank IC of the correct type (AT24C256C) and allowed it to load the settings by booting up the TV. Unfortunately it then thought it was in the UK rather than Australia, and was slightly odd in a couple of other ways. I applied the Samygo fix by temporarily jumping pins 5 and 8 of the EEPROM, but this had no effect. Hoping to be luckier on a second try, I replaced the EEPROM again, but got exactly the same result as the first time. I then went into the Service Menu and manually changed the Type (which was completely wrong), the Region (which was Paneurope and needed to be Asia DTV), and the Tuner type which was something odd and needed to be ALPS. When I rebooted, the problems were mostly gone. I did a Factory Reset, and the remainder of the problems were gone except that the time was wrong by 2 hours. In the MENU setup I simply changed the Australian state to the correct one (even though the state it had defaulted to had the same time zone) and the Auto time became correct. The TV now seems to operate exactly like a new one. Since according to the Service Menu it had only run 38 hours, I suppose that is to be expected.
            Attached Files
            Last edited by grumpy_one; 06-14-2016, 04:53 PM.

            Comment

            Related Topics

            Collapse

            • Oliver Kocsis
              Canon imagePROGRAF TM-200 - MC-31 Maintenance Cartridge Eeprom reset
              by Oliver Kocsis
              Hello all!

              My maintenance cartridge tank unfortunately is "full". Can anybody help me to reset it? I have the dump file read from the 4g16 chip....
              01-15-2025, 03:20 PM
            • SidneyCanadas
              93C46 and 93C56 EEPROM
              by SidneyCanadas
              I tore apart my instrument cluster for my 2008 Toyota Corolla made in 2007 in Cambridge, Ontario, Canada and pcb location: IC6=EEPROM is a surface mounted device with part # of 93C46W7, some claim the EEPROM out of a Camry part # 93C56 will allow odometer to roll over 299 999 KM or miles. The data sheet for both is below:

              https://cdn.badcaps-static.com/pdfs/...c6e42b20d3.pdf 2

              Anyone know if the Camry one will work on my Corolla?. And which EEPROM reader/writers do you all recommend I purchase that will allow me to read the old values of the old...
              06-14-2023, 01:16 PM
            • dmccul2698
              Pioneer DEX-P99rs "No EEProm " diagnostic code.
              by dmccul2698
              Hello, My head unit developed strange behaviors so I ran the built-in diagnostic package which returned "No EEProm". The service manual says there is no EEProm connected. I approached Pioneer and they said to swap out the DSP board. All said and good but the DSP board is $860 USD. I am hoping someone can help me

              1). Understand the schematic and check the connections between the EEProm and DSP
              2). Check the functionality of the EEProm

              I don't know if this is the unit's problem but it's a place to start.

              I have little to no electronic experience...
              04-08-2024, 05:32 PM
            • odie34
              Sony OLED XR-77A80J - 5 Flashes But Turn On After Hard Reset
              by odie34
              I am a hobbyist (not a professional) so please be gentle...

              I recently received an XR-77A80J that wouldn't turn on. (Repeating 5 flashes when plugged in.)

              I did a hard reset by holding the power button for about 30 seconds until the set powered down. I then tried to turn it on and it powered up, bringing me to the setup screen. There's not a lot of detail on the setup screen but the picture didn't have any distortions, so at least a cursory examination suggests no physical damage to the screen. The set appeared to be working normally, but it shut down after about 15 seconds,...
              02-18-2024, 09:11 AM
            • ictc
              Philips MDP 3380/12 Blu-ray Player – No Power, Reset Signal Always High
              by ictc
              I'm troubleshooting a Philips MDP 3380/12 Blu-ray player that shows no signs of life. The display remains off, and no buttons respond.

              Inside, the power supply is working correctly, and all expected voltages on the mainboard match the service manual specifications. The CPU warms up slightly (checked with a thermal camera), the crystal oscillator is functioning, but the reset signal remains high at all times.

              The reset circuit appears to consist of two NPN transistors, one driven by 5V VCC and the other by 3.3V STBY, as shown in the attached schematic. Should the reset...
              02-25-2025, 12:15 PM
            • Loading...
            • No more items.
            Working...