restore an lcd?

W

willisl@iupui.edu

Guest
The LCD on our landline phones has become illegible. Is there a way to
restore the LCD, or do we just go get new phones?

Thanks.

Lynn Willis
 
willisl@iupui.edu wrote:

The LCD on our landline phones has become illegible. Is there a way to
restore the LCD, or do we just go get new phones?

Thanks.

Lynn Willis
New Batteries or look in the instruction book for LCD contrast !
Click to expand...
--
Best Regards:
Baron.
 
willisl@iupui.edu wrote:
The LCD on our landline phones has become illegible. Is there a way to
restore the LCD, or do we just go get new phones?
Click to expand...
Is it missing segments or faded out?

If there are segments missing, it's probably time to replace the phone.
There are some things you could try but they're iffy at best. For
instance, you can disassemble the glass from the PCB, clean the contact
areas, and reassemble. This only works if the display is built using a
silicone "zebra strip" connector between the glass and PCB, and even
then only works if dirty contacts are the actual problem. (They usually
aren't). If that's not it there's probably a dead driver and most
displays are chip-on-board and so not practically repairable.

If the display is losing contrast, there may be a battery someplace that
needs to be replaced. Our kitchen phone takes 4 AA's (!) but they last
over 5 years; when they start to go the display begins fading. We're on
our third set of batteries -- do the math -- so it may be time for us to
replace that phone anyway :)

--
Gordon S. Hlavenka http://www.crashelectronics.com
Vote Ron Paul in 2008! Call 866-737-5066
 
On Sat, 17 May 2008 08:06:08 -0700 (PDT), the renowned
"willisl@iupui.edu" <willisl@iupui.edu> wrote:

The LCD on our landline phones has become illegible. Is there a way to
restore the LCD, or do we just go get new phones?

Thanks.

Lynn Willis
Click to expand...

The LCD (COG character display) on my desk phone quit, so I popped in
a new module. It was a heat sealed flat cable, but pinned out to the
standard 14-pin parallel interface to the HD44780U compatible chip.



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Thanks for the responses. Since the problem -- loss of characters, not
simply contrast -- has occurred with both phones in this set, I think
I'll go with the replacement option. I'm not averse to opening the
phones up and trying to clean the contacts, but since that action has
several possible outcomes, most of which are bad, I think discretion
will be the better part of valor here.

Thanks again.

Lynn Willis
Indianapolis
 
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