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IC910 fade on LCD
Posted: Sat Jan 23, 2021 8:41 pm
by VK4ALH
Hi All,
I have seen reference to a "two-resistor contrast modification" for the IC910. Can someone point me to any documentation to this mod?
Thanks!
73,
Leicester
VK4ALH
Re: IC910 fade on LCD
Posted: Mon Jan 25, 2021 8:34 am
by VK3ALB
Hi Leicester,
Adam performed that mod on his IC910H. You can see the result on his blog. The camera can sometimes lie when it comes to screen illumination. Not sure how much better it looks in real life.
Sent from my SM-T350 using Tapatalk
Re: IC910 fade on LCD
Posted: Mon Jan 25, 2021 3:38 pm
by VK4ALH
Thanks Lou,
Hey Adam - how did you do it?
73
Leicester
Re: IC910 fade on LCD
Posted: Sat Jan 30, 2021 1:56 pm
by VK4GHZ
Hi Leicester
I'm busy pursuing other interests at the moment, but that might make a good video topic in the near future.
Need to get the channel view hours up, so I can also bombard people with ads!
Re: IC910 fade on LCD
Posted: Mon Feb 01, 2021 5:03 pm
by VK4ALH
Hi Adam,
I was wondering if there was a document of some kind with the information I need.
If you produce a movie of the fix I will definitely watch some of the ads that go with it!
In my case the issue is that on the top row of the LCD the first digit fades after about 15 minutes, such that "1296.1" would appear as "269.1". The depth of the fade changes as other characters change, i.e. as I tune the frequency, causing different digits to display, the amount of fade alters.
73 for now,
Leicester
VK4ALH
Re: IC910 fade on LCD
Posted: Sun Feb 07, 2021 11:39 am
by VK4GHZ
VK4ALH wrote: ↑Mon Feb 01, 2021 5:03 pm
... the amount of fade alters.
That's exactly why no documentation was produced detailing resistor A = xx ohms and resistor B = xxx ohms.
The optimal values
for my LCD were determined by experimentation, and after learning about how LCDs work.
It's certainly not fit this resistor and that resistor value.
I might produce a video later in the year for the technically orientated hams, to guide them in the right direction, but the mod process certainly won't be suitable for the "Facebook type crowd" (if you know what I mean!) who want instant gratification with no effort. Experimentation will be required, which is in keeping with the spirit of the hobby.
Stay tuned.
Re: IC910 fade on LCD
Posted: Sun Feb 07, 2021 11:40 pm
by VK4ALH
Hi Adam,
Thanks for the update.
I look forward to what you come up with. however in the meantime, I would like to know which are the two associated resistors so that I can assess my next steps. I am comfortable with experimenting but am hoping not to have to "re-invent the wheel" if you have information to pass on.
73
Leicester
VK4ALH