STM CircleOS forum / almost blank screen

mdce · 2011-01-26 09:11:12

Hello,
The screen of my Primer2 is almost blank, I can read it when I incline it.
What is down ?

Limba · 2011-01-26 14:21:57

Hi,

Is 3V1 supply voltage OK?
U17 (L6928D) create 3V1 line.

Have you already read the schematics of Primer 2?

This switch regulator damage easely from ESD or voltage spikes.
I have already chaged two of these to 2V8 line
I ordered these parts from Digi-key.

mdce · 2011-01-28 12:49:56

Thanks Limba,
The VCC3V1 and VCC2V8 rails are correct.
Perhaps the screen is out of settings (contrast, brightness...), can I set these ?

yrt · 2011-01-31 14:36:02

You can set the brightness in the "Config/Power/Backlight" menu, but it seems that your Primer got a problem.
Did you received it like that, or is it arrived after software loading.
Try to reload the factory program, and if it is the same, ask the distributor where you bought it, may be you can replace it.

# 1 2011-01-26 09:11:12 almost blank screen

almost blank screen

# 2 2011-01-26 14:21:57 almost blank screen

Re: almost blank screen

# 3 2011-01-28 12:49:56 almost blank screen

Re: almost blank screen

# 4 2011-01-31 14:36:02 almost blank screen

Re: almost blank screen

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