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Sharp Microwave R515EX distorted display

Discussion in 'Electronic Repair' started by larry2shoes, Dec 12, 2004.

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  1. larry2shoes

    larry2shoes Guest

    My unit only displays partial data. The 'time' feature that is displaye
    when not in a cooking mode does not properly show the current tim
    unless I press the plastic cover with my fingers. The same can be sai
    for the display during the 'cooking' cycle. Other than that the machin
    works great. This unit is about 3 years old. The replacement price i
    about $130 dollars. I think I only paid about $75 on sale and a
    willing to shop for a new one if necessary. I am the sole operator bu
    the display causes me some annoyance each time I use it. If there i
    some one out there with an easy cure I am open to suggestions. I d
    have some electrical/mechanical knowledge and can do most simpl
    adjustments. Thanks in advance for any help you can tender.
    I wish you all a very happy holiday cooking season and a Merr
    Christma
     
  2. James Sweet

    James Sweet Guest

    Obviously some sort of bad connection, is it LCD or vacuum fluorescent
    display? This should be easy to fix if you can solder and know what not to
    touch inside a microwave.
     
  3. NSM

    NSM Guest

    |
    | My unit only displays partial data. The 'time' feature that is displayed
    | when not in a cooking mode does not properly show the current time
    | unless I press the plastic cover with my fingers.

    My Sharp has some sort of odd electroluminescent LCD that is presure
    sensitive. If it were me, I'd pull the control unit and refit it carefully
    to see if that would help. Otherwise shop for that part, buy a new uWave on
    eBay, try local repair shops ... ?

    N
     
  4. Graham

    Graham Guest

    I haven't seen the R-515 but I have repaired many Sharp R- series
    microwaves.

    Most have an LCD backlit by LEDS (not electroluminescent)
    The LCD is connected to the CPU PCB with a flimsy ribbon that is bonded to
    the glass and to the PCB.

    There is no reliable way of just replacing the LCD, so you have to buy a
    complete module, which Sharp call a CPU.
    This is a very common fault across the R- series.
     
  5. NSM

    NSM Guest

    | I haven't seen the R-515 but I have repaired many Sharp R- series
    | microwaves.
    |
    | Most have an LCD backlit by LEDS (not electroluminescent)
    | The LCD is connected to the CPU PCB with a flimsy ribbon that is bonded to
    | the glass and to the PCB.
    |
    | There is no reliable way of just replacing the LCD, so you have to buy a
    | complete module, which Sharp call a CPU.
    | This is a very common fault across the R- series.

    Mine is a Sharp R-320FK Sensor. If you lightly brush your fingers across the
    display it displays bright 'crinkles' which slowly fade away. I really
    believe it is electroluminescent, yellow alphanumerics on top and red
    legends on the bottom. It just does not look like any sort of backlighting.

    N
     
  6. Guest

    displayed

    There is a repair service for this.

    It runs $32.50 postpaid.

    Details are at http://www.tinyurl.com/yvcgr
     
  7. The problem is the ribbon cable that connects the display to the board.
    Sharp uses a thermaly activated glue to stick the ribbon cable to the
    display and to the board. The cable ends can be heated with a hair drier to
    reactivate the glue then apply pressure by wiping a finger tip accross the
    cable connection until it cools(if you have a low pain tollerance, use a
    pencil eraser). This works about 80% of the time.

    Tom
     
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