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Talking with monitors microprocessor (Acer)

Discussion in 'Electronic Repair' started by Heinz Schmitz, Dec 14, 2003.

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  1. Acer 7276e is controlled by a 87C52 microprocessor. Actually, the
    TxD and RxD lines are accessible on the VGA-connector, where an
    additional line is found, too, to supply microprocessor and serial
    Eprom with 5V - obviously, the communication seems to be done
    while the monitor is switched off.

    Does anybody know the protocol and commands to read/write data
    into the chip, to get_at/adjust the factory/start settings? I'll
    probably be able to find out eventually, but an expert would kindly
    save me a lot of time and effort.
    The supplier of this monitor pretends to know nothing :).
    Other (younger) Acers have a processor chip labelled with a seemingly
    proprietory code (like 177....). Any idea, what microprocessor is
    hidden behind this label?
    Thanks in advance,
    H.
     
  2. Jerry G.

    Jerry G. Guest

    All the makes use their own proprietary command set. This is addressed from
    your system by the driver that they install. When the operating system
    controls the monitor options and operation modes through the driver, this is
    called the "smart mode". If you put the generic driver for your monitor,
    the monitor works in a sort of dumb mode. It will sense only the sync pulse
    rates for line and field, to know the mode to go in.

    What you are asking is kept confidential under contracted agreements, like
    MS would never give out any source codes for their programs, or operating
    systems. It is true that at the service level, the employees and service
    people would not know what you are enquiring about.

    Most of the CRT type monitors out there are not truly smart monitors. This
    is seen more in the very high end monitors, and in the LCD types.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    Acer 7276e is controlled by a 87C52 microprocessor. Actually, the
    TxD and RxD lines are accessible on the VGA-connector, where an
    additional line is found, too, to supply microprocessor and serial
    Eprom with 5V - obviously, the communication seems to be done
    while the monitor is switched off.

    Does anybody know the protocol and commands to read/write data
    into the chip, to get_at/adjust the factory/start settings? I'll
    probably be able to find out eventually, but an expert would kindly
    save me a lot of time and effort.
    The supplier of this monitor pretends to know nothing :).
    Other (younger) Acers have a processor chip labelled with a seemingly
    proprietory code (like 177....). Any idea, what microprocessor is
    hidden behind this label?
    Thanks in advance,
    H.
     
  3. Thanks for your kind answer.

    [ .. ]
    I don't think that this is a valid comparison. Knowing the commands to
    do or redo the factory setting wouldn't put me in a position to build
    monitors and to endanger their business.
    Thus, keeping this knowhow confidential, should, infact, be sueable
    with regard to antitrust laws :). Why do they sell me a monitor at
    all, instead of keeping the device secretly at home?
    I did ask people at service management level. I didn't even ask a
    favour, but offered to pay. Does leave a bas taste, indeed.
    H.
     
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