[Elecraft] P3 Failure, and question

Dave Cole dave at nk7z.net
Mon Apr 12 09:03:11 EDT 2021


Rick,

Thank you!  I appreciate the datapoint in this.  I was just looking over 
the schematic and came to the same conclusion...  It looks like a 
backlight problem to me as well...  I tried to find a datasheet on teh 
4538 IC that appears to control it, but alas, nope.  I got mine to come 
back on by power cycling it as well...

Hopefully someone has actually fixed this, and knows which cap...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/12/21 5:27 AM, Rick Stanback wrote:
> My P3 does the same thing.  If i keep cycling power it eventually comes
> on and works.  I suspect there is a bad capacitor in the LCD backlight
> power.  I have not actually looking into it yet.
> 


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