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Sony Trinitron Monitor

Discussion in 'Electronic Repair' started by HankG, Apr 16, 2007.

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  1. HankG

    HankG Guest

    I have a 19" Sony Trinitron Monitor which since before its 3rd anniversary,
    has been getting dimmer and dimmer. In order to use it, I've had to
    maximize contrast and minimize brightness. The color rendition is fine, the
    picture is sharp. Just dim. On a dark background, you can see retrace
    lines. Boy, it's been decades since I've seen them.

    Just wondering whether there are any user-serviceable parts that I can
    replace. Thanks for you input.

  2. User-serviceable ... sorry, no.

    Low emission on the CRT would be my guess.
  3. Jerry G.

    Jerry G. Guest

    The CRT has been decreasing in emission, and the AKG circuits have
    been trying to compensate to give proper bias. The range of the AKG is
    probably at the end of its range. Sometimes, this can be temporarily
    compensated for by adjusting the G2 (screen) bias adjustment. The
    colour ballance will most likely shift with the bias change.

    Jerry G.
  4. Eeyore

    Eeyore Guest

    Which model ?

    Look for 'color restoration' on the menu.

  5. Starflex

    Starflex Guest

    Probably is simply the "overbright" problem: I have just fixed two monitor
    last days.
    Very simple to repair, you need only the Sony software and a simple
    RS232-TTL cable to connect the PC with the monitor.
    Please inform us about the model, so we can help you.
  6. Dani

    Dani Guest

  7. Starflex

    Starflex Guest

    This solution, I think, is for G1 chassis..
    Probably pur friend don't have this chassis in his monitor.
    I' ve used this solution (of changing R) and it work very great!
    But finally I've choose to set G2 value using WinDAS software and a specific
    cable to connect PC and monitor: this is the "better" solution, because you
    can reset the eeprom of the monitor to the correct value of G2 parameter.
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