Re: #QCX40 Rev5 LCD contrast adjustment appears to cause massive current draw #qcx40


Alan G4ZFQ
 

until suddenly it changes the contrast, and instantly the processor becomes unstable (usually reboots--showing the boot-up text again), and the voltage regulator gets really screaming hot
This seems to indicate a short between pins 2, 3 of R47. It is shorting the 5V line to ground.

73 Alan G4ZFQ

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