🚀 go-pugleaf

On 7/02/2012 1:02 AM, N_Cook wrote:
> Sylvia Else<sylvia@not.here.invalid>  wrote in message
> news:9pa0n7F1huU1@mid.individual.net...
>> On 6/02/2012 7:58 PM, N_Cook wrote:
>>> Sylvia Else<sylvia@not.here.invalid>   wrote in message
>>> news:9p9i8dFk4bU1@mid.individual.net...
>>>> After operating OK since the repairs I did after dropping a curtain
> pole
>>>> on this radio a month or so back, the LCD is playing up.
>>>>
>>>> If I perform an operation that clears the display, and enter an 8
> digit,
>>>> it looks normal enough. If I enter a second 8 digit, some of the
>>>> segments of both digits (the same ones in each case) become fainter. If
>>>> I enter a third 8 digit, the segments become fainter still, and so on,
>>>> until they're pretty much invisible.
>>>>
>>>> This suggests an issue with one (or more) of the backplanes.
>>>>
>>>> The signals going in look normal enough, and in particular the
> backplane
>>>> signals don't change as I enter additional digits.
>>>>
>>>> Any thoughts before it ends up on the tip?
>>>>
>>>> Sylvia.
>>>
>>> Is there a contrast control that got broken as well?
>>> What other LCD legends etc other than the main 8 digit display ?
>>>
>>>
>>
>> Can't see anything that adjusts contrast.
>>
>> The LCD doesn't have that much other than digits, but those that it has
>> seem to work normally.
>>
>> The digits appear thus
>>
>>
>>    XXXXXX
>> X      X
>> X      X
>> X      X
>>    ......
>> .      .
>> .      .
>> .      .
>>    XXXXXX
>>
>> Where XXX denotes segments that work, and ... denotes segments that don't.
>>
>> All the digits are failing in the same way, including a small digit that
>> denotes a channel number.
>>
>> Since my original posting, I surmised, by cutting tracks, that these
>> segments share a segment common, as do the top three. So then I
>> connected them the other way around, with the result that the digits
>> come out wrong or garbled, but the same three segments misbehaved.
>>
>> The connection to the LCD is via an eltroconductive rubber strip, which
>> seems OK. Seems to me that the LCD itself is failing. Seems a strange
>> failure mode though.
>>
>> Sylvia.
>
> So probably a crack in the glass at the backplane connections

Not entirely inconsistent with dropping a curtain rail on it, I suppose :(

> and so some
> silver loaded paint
> perhaps, if lucky and an exposed area.

I can't see any defects.

Sylvia.