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QCX 40M Serial 4055


 

Friends,

I apologize if this a duplicate but I never saw the message nor any response.

I am struggling with my QCX kit.? I have finished construction and tried to align the radio.? I get a single row of LEDs across the top.? The contrast adjusts normally.

I spent some time measuring some of the voltages in the manual.? I did get some anomalous results.? The measured value is first, the manual value is second.

C45 1.29V? -? 2.44V
C46 0.78V? -? 2.30V
LCD Pin 4 3.48V? -? 4.92V
LCD Pin 7 thru Pin 10 4.88V? -? 1.08V
LCD Pin 11 4.88V? -? 0.00V
LCD Pin 14 4.88V? -? 0.00V

I have carefully checked my soldering work several times under a high power magnifying light and lens.

Could this be one of the bad chips mentioned recently?

Any thoughts or suggestions would be most gratefully received.

Jeff
WV9X


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