Re: No output, Reason to worry #qcx #40m


KI7MWA
 

For James: with microcontroller & LCD removed, voltage on microcontroller socket pin 17 steady at 1.09V for over a minute.  One punctured gate cap!

Some additional information (now that I've got a better handle on the troubleshooting guide): Voltages on IC3 pins while in transmit (nominal values in parens):

1: (5V square wave, ~2.5V RMS) +4.95VDC
2: (same as 1)
3: (5V square wave) 0 (zero) VDC
4: (3.3V square wave, ~ 1.65V RMS) ) 0VDC
5: (+5VDC) +4.95VDC
6: (same as 1) +4.95VDC
7: (0) 0VDC
8: (+5 VDC) 4.95VDC
9: (0) 1.3VDC
10: (same as 4) 0VDC
11: (+5VDC) 4.95VDC
12: (0) 0VDC
13: (0) 0VDC
14: (+5VDC) +4.95VDC

So, maybe more than 1 punctured gate cap?

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