Coby TVDVFD3295 -EEPROM?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Caleb
    Smokin IC's
    • Feb 2013
    • 645
    • USA

    #1

    Coby TVDVFD3295 -EEPROM?

    I picked this set up for free a month or so ago, finally had a little time to test it out and found one of the back light transformer open circut. Bought a new (used) inverter off ebay and I still get no response from power button. The main is turning on the power supply when plugged in and all voltages are correct, It is not sending the blon signal out. I verifed the button board is good and I can see the button pulses on the main board. At this point Im sure the remaining fault lies in the main. I get spot on voltages out of the two 1.8v regulators and the 3.3v reg. At this point Im thinking the eeprom is corrupt. I was going to use the resistor from vcc to sda but when I pulled the datasheet it doesn't have an sda pin. Im fairly sure Ive got the right chip, there are only 2 8 pin ics on the main a-
    MX
    2sl3205d
    16 bit serial flash memory
    and

    mp1482ds
    Synchronous Rectified Step-Down Converter

    Attached is the datasheet, if Bud Or Tom could verify this is the correct chip and enlighten me as to the correct sequence to reset it.
    Attached Files

    if you find these attachements useful please consider making a small donation to the site

    Liberating magic smoke one part at a time
  • Caleb
    Smokin IC's
    • Feb 2013
    • 645
    • USA

    #2
    Re: Coby TVDVFD3295 -EEPROM?

    Bump
    Liberating magic smoke one part at a time

    Comment

    Related Topics

    Collapse

    • Dani_2024
      Sceptre U550CV-UMR 4K LED, Bad Caps on Main Power Board?
      by Dani_2024
      Hi and thanks in advance for any input you might provide!
      I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
      Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO

      Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this...
      10-28-2024, 05:06 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
    • ygorsan
      LG 55NANO77SRA TV – Menu scrolling by itself even after removing button board (Main Board EBU66792103)
      by ygorsan
      Hi everyone,




      I’m looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).







      🧩 Problem Summary:
      • The TV keeps scrolling through the menu or selecting items by itself.
      • I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
      • The remote control is not in use (batteries removed), and the TV still shows the same behavior.
      • I
      ...
      07-28-2025, 08:34 AM
    • semiRocket
      Toshiba 37bv701b power supply main rails
      by semiRocket
      The set is not turning on, when buttons on the front are pressed the button press sound is coming from the speakers, but the set is not trying to turn on, consuming only couple of watts.

      I am troubleshooting a Vestel 17PW26-5 from the set. Not sure how it is supposed to turn on main supply, but with the main board disconnected not getting the main supply to turn on either.

      Standby supply is working, PFC is working (390V), but the main supply is dead. Checked the mosfets and driving transistors and found they are not shorted and showing a diode junction. The suspicious...
      10-26-2025, 01:55 AM
    • mrautom8
      Samsung TV UN75H6350AFXZC main board schematics?
      by mrautom8
      Schematics for the main board needed please. Sticker on board states BN94-07517A but the silkscreen says BN41-02157B. Cant find here or anywhere on the web.

      Backlights work when main boards disconnected. When connected and power button switched, the relay on the PSU board turns on for one second then back off.
      While relay is on, all voltage rails are present and steady (scoped) on main board.
      I love a good logic puzzle but getting lost without any schematics.
      No shorts on ANY capacitor main board.
      Thermal camera shows 3.3V inductor getting warm instantly but...
      10-19-2025, 06:32 PM
    • Loading...
    • No more items.
    Working...