QCX Blank LCD


Richard Hall
 

Hello, I just built the 80 meter version of the QCX and have a blank LCD: no blocks, just the backlight.
With 12.7 volts input I see these voltages at the LCD pins:
1 0
2 2.08
3 2.08 (varies with R47 from 0 to 2.08)
4 .03
5 0
6 0
7 2.08
8 2.08
9 2.08
10 2.08
11 2.08
12 2.08
13 2.08
14 0
15 4.52
16 0

Can you suggest where to start looking for the fault?
Thanks,
Richard NS3C

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