I recently finished my first build of the QMX and can't get it to power up properly. At first when I pressed the left encoder, the power consumption went up to 440 mA and then back down when the encoder was released. After some inspection I thought that I had blown Q101 because it was getting hot with the left encoder pressed. I replaced it and my consumption when down to 340 mA but it would still not power on.
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Thinking it was a problem with the power board I ordered a new 3.3V power board and replaced it. I still get 340 mA when the left encoder is pressed. With a 7.0V supply I am getting the following voltages with the left encoder pressed.
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+12V: 7.0V
LIN_REG_EN: 5.1V
VDD: 0.2V
IC101 VI: 5.0V
IC101 VO: 1.2V
IC101 GND: 0.5V
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Would appreciate some thoughts if anyone has had a similar problem or might know what is going on
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Thanks,
Jeremy Goates
KK7QVY
