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Author Topic: 1602 Display Problem  (Read 570 times)

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Offline radiotekTopic starter

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1602 Display Problem
« on: May 02, 2022, 09:27:05 pm »


I just turned on my LC-100 LC meter and now the display is really weird looking.
If I turn the display at a certain angle I can just about read what it normally displays and it looks like its working..

Not sure what to do, I was thinking about disabling the back light but I really do not think it would help.

Any idea what these characters are that are being displayed and how to get rid of them ?

Any help would be appreciated.
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Offline TheMG

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Re: 1602 Display Problem
« Reply #1 on: May 02, 2022, 09:44:51 pm »
That's the contrast setting is out of adjustment. Is there a contrast adjustment pot somewhere on the board? It could also be a soft function.
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Offline jeremy

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Re: 1602 Display Problem
« Reply #2 on: May 02, 2022, 10:04:16 pm »
Agree on the contrast setting. It is usually controlled by the VO pin on the display, maybe measure the voltage there and see if it is sensible? Also, have a look on the PCB if possible and see what connects to that pin.
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Offline metrologist

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Re: 1602 Display Problem
« Reply #3 on: May 03, 2022, 04:02:21 am »
Scroll down for the contrast mod, or change value of R1.

https://vk4ghz.com/lc100-a-lc-meter-mods/

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