I'm helping out K7BTW with his K1 kit; we've got it assembled and tested to the point of #7 - Alignment and Test. We have done all of the somewhat static value checks and tests up to this point. When we turn the unit on (with no smoke or heating parts), the ATTN yellow light comes on, then off, then the RIT/XIT light flashes green, then RED (not really orange, to my eye. Yes, the 100K R9 and R10 around the LM358 op-amp are installed correctly). Then it goes out, then the ATTN light comes on again briefly, then it goes out. We get NOTHING on the LCD Display. We've run all of the continuity tests on the data lines, etc.
If we power on the rig while holding the DISPLAY -or- the EDIT button, then the LED sequence is as above, except that the ATTN light stays on while the button is pressed; releasing the button shows "109" on the LCD (looks like the LCD is working). If I knew what the firmware was expecting from the hardware between the light sequence and the initial LCD display, I could better determine where we are finding some error. I suspect the CPU is expecting some condition that we aren't able to satisfy because of an error somewhere that we've not found yet. Suspecting that perhaps the EEPROM was a little scrambed, I held the EDIT and DISPLAY buttons down while powering on - that didn't really do anything, still no LCD display. Can anyone suggest any further troubleshooting, or locations to look at? Thanks!-Brian N9ADG ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
