[Elecraft] [K1] Error27 - Alignment and Test Part 1

[Benjamin Schmid]

Hi Don, 

thanks for your help.

I did the troubleshooting steps:
- Turning the K1 off and on again ->  no effect. No relays clicking on startup.

- FIL-U1 is installed correct (notch to the rear), no bent pins, checked the soldering of the socket.
The manual states that FIL U1 may be defective. I just wanted to clear out other possibilities before ordering a replacement.

- With power on I  checked the voltages at FIL U1 and FP U1 according to the voltages table.
All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 Voltage is unstable between below 0.3V to 1.6V
All MCU voltages are within range except Pin 6. Just measured 1.9V there should be 2.5V

Power consumption is at 66mA with no audio output and the LCD backlight (bright version) installed.

Thanks again for your time.


>> Be certain all pins of the headers to the filter board are well soldered. 
>> If the band board firmware (U1) is plugged in backwards, you will have low voltage on pin 16 and the regulator will get hot.  The notch on U1 must point toward the rear of the board.