I am up to page 63 of the manual which is the alignment and test part 2. Upon initial testing there is a problem with all of the Bank 1 push buttons. There is no effect on any of the left push buttons. The right push buttons on Bank 2 work except for the mode switch and rate / lock switch. All rotary switches and the encoder appear to work as the display shows the changes. All tests on Alignment Part 1 went well with no issues.
So far , I have rechecked the entire front panel board and control boards. All of the resistor packs are correctly installed as well as all diodes , transistors and IC's. Soldering was rechecked and connections reflowed. On the control board I am getting 8 volts on U4 and 5 volts on U5. U6 on the control board , MCU, there are two voltages wrong. Pins 18 and 25 both should be zero volts. Both measure 5 volts. There is also an issue with U2 on the control board. Pin 8 is correct at 8 volts and pin 4 is correct with zero volts. All other pins are approximately 1/2 of what they should be. Pins 1 , 2, 3, 5 , 6 and 7 are all approximately 3.8 volts. U1 on the RF board voltages are correct. I could use some guidance on where to begin. Glenn K5ZE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
