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TFT-Tom
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Last Activity: 12-26-2010, 04:37 AM
Joined: 12-15-2010
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  • TFT-Tom
    replied to AOC LM2028 no function
    in Troubleshooting Computer Displays
    Re: AOC LM2028 no function

    Hi,
    yes, 4 TRS = Voltage Regulators - sorry.
    By the way, sorry for my bad English too

    I read the voltage on the 4 regulators as follows:

    U10 Pin1: GND U11 Pin1: GND
    U10 Pin2: 2V50 U11 Pin2: 2V51
    U10 Pin3: 4V63 U11 Pin3: 4V61

    U10 / U11 - Low Drop Voltage Regulators RT9164 (2V5 / 1A)


    U9 Pin1: GND U12 Pin1: GND
    U9 Pin2: 3V31 U12 Pin2: 3V30
    U9 Pin3: 4V63 U12 Pin3: 4V61

    U9 / U12 - Low Drop Voltage Regulators...
    See more | Go to post

    Leave a comment:

  • TFT-Tom
    replied to AOC LM2028 no function
    in Troubleshooting Computer Displays
    Re: AOC LM2028 no function

    Here some Photos from Power supply and signal board...
    See more | Go to post

    Leave a comment:

  • TFT-Tom
    started a topic AOC LM2028 no function
    in Troubleshooting Computer Displays

    AOC LM2028 no function

    Hi,
    my AOC LM2080 stoped working - no start up.
    no POWER LED, CCFL´s dont light up, nothing on display

    The power supply seems to be OK -> 5V and 12 V OK

    At the Collectors of the 4 big TRS on signal PCB i measure 2V5 and 3V3.
    The 24MHz and 14Mhz Oscillators are running,
    but there is no traffic on I2C-Bus.
    The 8bit Microcontroller from Winbond does not provide a cycle for I2C.

    Do someone have an idea?
    May somone have a schematic?

    Thanks

    Tom
    See more | Go to post
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