Monochron display weak

[Menno]

I've got the kit some weeks ago, i soldered it all test where ok (voltage, beep ,led)
But the screen is very weak, not quite readable , i tried very settings but no change, checked the soldering redo some no change
do you have a solution ?
Thanks Menno

[Menno]

here some photo's

[Menno]

some more photo's

[Menno]

Nobody ???

Please anybody ??

[adafruit_support_bill]

Sorry we missed your first post. Since you replied to it yourself, it didn't show up in out list of "unanswered posts".

Your soldering looks good. Check the voltages again with the display installed to make sure they are still in the right range.

[Menno]

Thanx for your reply
The voltage is 5,01

Menno

[adafruit_support_bill]

Have you tried adjusting the trim-pot?

[Menno]

yes it's gives me on a half a millimeter maximum visibility
it's to dark or to bright just at one point it gives what you see

[adafruit_support_bill]

If I understand what you are saying, it goes from too dark to too light with nothing in between?

It sounds like you may have a defective trim-pot. If you contact support@adafruit.com with a link to this thread we can send you another trim-pot.

[Menno]

Thanks for the new 10K trim potentiometer
I've fond finally some time to solder it.
I measured the old en new before i soldered the new one.
They gave the same result on the meter.
So , as i thought no better result, still at one point i've got visabillity, a hair too the right or left gives you a black or too bright screen.
I've looked at the site http://www.ladyada.net/make/monochron/newclock.html
they are all so bright and crisp on the screen, even your foto.
I can't get it so neat
I am eager to hear and try the next possible solution

Thanx
Menno Damsma
Netherlands

[adafruit_support_bill]

These displays are normally quite bright and crisp. In the photos, I can't see the soldering for the contrast circuit. Double check all those joints and re-touch any that do not look smooth and shiny. The rest of your solder looks quite good from what I can see.

If you still can't get a good image, contact support@adafruit.com with a link to this thread and we can send you another display.

[Menno]

Oke
so that we are clear where is the contrast circuit ?
so that i can particaly re do them
Thanks
Menno Damsma

[adafruit_support_bill]

The contrast circuit is as in the diagram below. It includes pin 3, pin 18 and the pins of the contrast potentiometer.

[Menno]

Oke Thanks,

I've redo them
Set the backlight on 16
and see the foto's this is the max i can get, and the room have to be blinded.
So this is it or is the display defect?

[adafruit_support_bill]

Yes. I think you have a bad display. Contact support@adafruit.com with a link to this thread.