[Elecraft] K2/100 RS232 trouble

[bo.andersson at ingbo.se]

Hi

 

RS232 does not work to K2 / 100 via usb.

Have tested various rs232 / usb adapters, also brand new.

The correct values ​​are entered in the computer for the port.

All measured values ​​of U4 MAX1406 are according to Table 4 IC DC voltage chart.

Has also changed U4 to a new one.

Is it the control board on K2 that is faulty?

How do I investigate this?                     

SM6FPG/Bo