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Cold weather display issue Lincoln II V3

Discussion in 'General CB Services Discussion' started by Big Kahuna, Feb 26, 2021.

  1. Big Kahuna

    Big Kahuna Sr. Member

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    Whoops meant to post this in the Export radio section.



    Here's a fun one! First noticed this issue in my car a while back in some cold weather but had radio inside after that so wasn't an issue. Been using the radio in a unheated shop recently and noticed that if the temp is below 60 or so the radio display acts up. I can aim a heater at it and the display starts coming back but as soon as it cools off again the display goes out. Everything on the display works perfectly fine (once I can see it). :) I think this radio is 5+ years old now and was used heavily in my mobile it's first 4 years.

    [​IMG]
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    [​IMG]
    [​IMG]
     
    #1 Big Kahuna, Feb 26, 2021
    Last edited: Feb 26, 2021
    Shadetree Mechanic and Slowmover like this.

  2. Dmans

    Dmans Sr. Member

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    Very strange. Is that a trait of a Liquid crystal Display?
    Rhetorical question-but inquiring minds want to know.

    73
    David
     
    Slowmover likes this.
  3. sp5it

    sp5it Master of puppets

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  4. Slowmover

    Slowmover Elmer

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    Low temp shrinkage . . and a pitiful display.
     
  5. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    It occurs with LCD displays in watches - vehicles - lots of stuff.

    Per @sp5it - it pretty much causes the dropout.

    Eventually moisture kills the rest of the display - so best to use a "warmer". Helps drive out moisture and warm the LCD crystal so it can twist more effectively.

    The plates of the LCD and it's material sandwiched in between - there is a polarizing filter used to show up the polarization effect of the windows to the crystal twist in the display - darkening the element.

    The HR2510 used a filament lamp - but too much heat can do he same results - permanently darkening it from too much heat - so work accordingly.
     
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  6. Big Kahuna

    Big Kahuna Sr. Member

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    Hmm I have a little 12V aluminum heating element (similar to the one pictured below) - maybe I can mount it on the case towards the front and it will radiate enough heat to warm up the display and keep it on.

    It gets pretty warm so wouldn't want to mount it directly but maybe nearby would work.

    [​IMG]
    Maybe I just need to hold on to the radio long enough till I move back to Hawaii, then everything should be fine :)

    I went surfing in 35 degree temps today so I can relate to the radio experiencing shrinkage.
     
    #6 Big Kahuna, Feb 27, 2021
    Last edited: Feb 27, 2021
  7. nomadradio

    nomadradio Analog Retentive

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    Loss of only part of the display suggests the "zebra" connection is pulling away from the display glass. Not the only way the display could lose drive to parts of the screen. Probably the most common.

    73
     
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  8. bob85

    bob85 Supporting Member

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    Fading with temperature is normal for perfectly working lcd displays,
    That's why some Whites detectors have viewing angle adjustment to restor contrast in low temperatures,

    The same effect but more extreme happens when the conductive elastomer gets contaminated,
    missing or faded segments is the only fault i ever found on a Fluke dmm & very easy to fix,

    I strip & thoroughly clean the edge of the glass & the rubbers & the pads on the pcb with 100% dry isopropyl alchohol, no touching with bare fingers & reassemble.

    works every time for me.
     
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  9. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Maybe you could put a night light bulb under the radio and just leave it on all the time? Or maybe an IR heat lamp on a lamp timer pointed at the top of the radio? Or maybe put the radio on a heating pad on a lamp timer?
     
  10. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    Or just use a Hair dryer - Woo Hoo!

    Keeps you warm too...

    Mobiles setups, not so much...need a LO-o-o-o-o-O-Ng extension cord...
     
    Shadetree Mechanic likes this.
  11. Slowmover

    Slowmover Elmer

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    Prop up next to radio

    4597FD87-5934-4F54-8ACF-2B726C74890E.jpeg
     
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  12. TM86

    TM86 Sr. Member

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    As good as that picture is, there's ...um... indicators that she wasn't all that warm when it was taken.
     
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  13. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    You leave my Girlfriend out of this...

    (y);)(y)
     
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