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LCD 2004. Set contrast

Posted by zonalimitatore 
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zonalimitatore
LCD 2004. Set contrast
April 01, 2019 07:29AM
Hello.
I've a printer with 20x4 screen and as reader.
I have need adjust contrast,but there isn't a trimmer
Someone can tell me how to do and the kind of trimmer I've need?
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Dust
Re: LCD 2004. Set contrast
April 01, 2019 07:39AM
Please post pictures of both the front and back of your LCD
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zonalimitatore
Re: LCD 2004. Set contrast
April 01, 2019 12:13PM
I can't attach photo.... give me error: 413 Request Entity Too Large
But file it's 2mb

Anyway...it's a standard 2004 mount on a Geeetech a10
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zonalimitatore
Re: LCD 2004. Set contrast
April 01, 2019 12:18PM
Ok now it's ok.
I think it's VR the place to put a trimmer

Edited 1 time(s). Last edit at 04/01/2019 12:19PM by zonalimitatore.
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Attachments:
open | download - IMG_20190401_181737.jpg (660.9 KB)
Dust
Re: LCD 2004. Set contrast
April 01, 2019 09:23PM
standard 2004's don't have a flat flex cable...
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Dust
Re: LCD 2004. Set contrast
April 02, 2019 03:07AM
I would agree, its looks like a standard variable resistor foot print and it is named VR
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zonalimitatore
Re: LCD 2004. Set contrast
April 02, 2019 04:45AM
Ok. Know ohm?
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Dust
Re: LCD 2004. Set contrast
April 02, 2019 04:54AM
should be a 10k

Check the the pads arent already connected with thin traces (I cant tell from the photo)
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zonalimitatore
Re: LCD 2004. Set contrast
April 02, 2019 06:10AM
In the pad there is nothing. I try to find a datasheet. Thanks
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zonalimitatore
Re: LCD 2004. Set contrast
April 09, 2019 07:07AM
Well. I solve it. On the back there's a "VR" pin. Trimmer on it and work. Thanks
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