Juha, OH6OS Did you get solution already? If not please refer following advice that I had given from tech support of Elecraft egarding same problem.
===Q't=== You need to always be careful to remove *all* cables from the K3 is there is a bad lightning storm. We see lots of damage to customer's K1, K2, K3 each summer when this is not done. I learned this the hard way when I lived in Florida where lightning is severe. Possibly U1 on the KIO3 main board is damaged or the negative supply voltage is too low or is missing. We've seen a low negative level on some rigs if the 1kHz oscillator is not working well. With the serial cable removed, please check to see if there is at least -5VDC at U1 pin 8 on the KIO3 main board, or at the gold plated hole which is right next to pin 8 (bottom left side of U1, as you face the front of the rig). -7VDC or more is normal. Also touch U1 to see if it feels hot or warm, or if it looks to be damaged. If you suspect this is the problem, we can send you a new IC for U1, or the entire KIO3 main board will need to be replaced. Also check the little board that has the ACC and RS232 connectors to see if it might have an open SMD RF choke. Use an ohmmeter to see if all of the RFCs show less than 10 ohms as expected. ==Unq't=== GL! Atsu, JE1TRV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
