Does CH341a has faulty manufacture yet?

Discussion in 'BIOS Mods' started by Hugh1987, Aug 25, 2021.

  1. Hugh1987

    Hugh1987 MDL Novice

    Jul 25, 2021
    Hello everyone, as I have ordered CH341a black version programmer to unbrick my laptop bios chip winbond 25q128fvsg.

    I came a cross a YouTube to find a video showing that this programmer has a failure manufacturing.
    The CH341A programmer outputs 5 volts instead of 3.3 volts which from what I read online it burns or destroys your chip when programming it.

    And one more question please, the package I ordered it also has 1.8v adapter, would it be safer to flash the -winbond 25q128fvsg - (if I have no choice) with the faulty 5 volts or with the 1.8v adapter?

    Ps: my Winbond chip datasheet says it is 3.3 volts.

    I just want to know if that is true to avoid this problem and in case to use another kind of programmer tools.

    Thank you very much in advance.
  2. tqhoang

    tqhoang MDL BIOS Modder

    Apr 29, 2008
    #4 tqhoang, Aug 27, 2021
    Last edited: Aug 27, 2021
    My chip was fine. It just gave back garbage data when I tried to read it at 5V.

    That DollaTek is a CH341A programmer, not just a voltage converter. If you look at the Amazon picture, the two jumpers in the lower left control the voltage output.
    • 5V = both jumpers on left position (factory default)
    • 3.3V = both jumpers on right position