+++++++++++++++++++ Reply-To: From: "Tom" To: , Subject: RE: [Elecraft] K2 Alignment and Test, Part 1 Date: Sat, 5 Jan 2002 12:23:56 -0500 In looking at ENC A & ENC B on the control board, with the front panel board remove I see all kinds of garbage on the ENC A input to the MCU. ENC B is steady at 0 volts. Since these are both inputs to the MCU, with no front panel I would expect to see a steady signal. -TAC -----Original Message----- From: elecraft-admin at mailman.qth.net [mailto:elecraft-admin at mailman.qth.net]On Behalf Of Tom Sent: Saturday, January 05, 2002 10:23 AM To: elecraft at mailman.qth.net Subject: [Elecraft] K2 Alignment and Test, Part 1 I seem to be having some problems on the Alignment and Test, Part 1 page 41 of the manual. On initial power EVERYTHING was working as described up until the optical encoder test on page 42. As soon as I touched the VFO knob the display changes and then locks up requiring me to cycle power. Observations: 1. After the display locks up it ends up message like "SPd 51", "P8.2", or 7099.9. When the display locks the "SR CK" signal goes to, and stays at 0 volts (per digital scope). 2. If R5 (RIT/XIT) is less than about 80% of full clockwise the LCD displays "ELE" if turn to full CW display will change to "ELECRAFT". 3. Moving R5 slightly will cause the display to change briefly from 7099.9 to "P14.8" or "P13.2", "SPd47", "SPd48", and then back to 7099.9. 3. About half of the time on power up the display is stuck on 7099.9. 4. About a quarter of the time the display and buttons work great until I touch the VFO knob. Questions: 1. I did read about the "ELE" message but don't understand how the /SPD RD, /BANK1, /BANK2 outputs can impact the data and clock lines out of the processor (U6). I also don't see how the shaft encoder lines could cause the unit to "lock up". Can anyone tell me how the /SPD RD, /BANK1, /BANK2 lines are strobed? In looking at them with a scope they are static. It's kind hard to tell what should be going on without knowing what "tricks" are going on with the software. I did borrow a nice 4 channel digital scope from work so if anyone has any questions about the various signals let me know. Thanks, Tom crites at iname.com ++++++++++++++++++ Reply-To: From: "Tom" To: , Subject: RE: [Elecraft] K2 Alignment and Test, Part 1 Date: Sat, 5 Jan 2002 13:29:35 -0500 Don, A hard reset gives me a "InFO 201" on the display then I end up with the same problems. I do have some scope traces of ENC A, ENC B, and SR CK if you are interested. I'm seeing the SR CK signal on the ENC A line. Thanks, -TAC -----Original Message----- From: elecraft-admin at mailman.qth.net [mailto:elecraft-admin at mailman.qth.net]On Behalf Of DolfinDon at aol.com Sent: Saturday, January 05, 2002 1:10 PM To: elecraft at mailman.qth.net Subject: Re: [Elecraft] K2 Alignment and Test, Part 1 Hi Have you tried a hard reset on the processor. Hold the 4,5 and 6 buttons while powering on the K2. Don Brown KD5NDB ++++++++++++++++ Date: Sat, 05 Jan 2002 14:51:55 -0800 From: Eric Swartz WA6HHQ - Elecraft Organization: EleCraft To: elecraft at mailman.qth.net Subject: Re: [Elecraft] K2 Alignment and Test, Part 1 You will see these pulses rather than a constant signal because we only power up the encoder periodically when we read it with the micro controller. 73, Eric WA6HHQ ====== DolfinDon at aol.com wrote: > > Looking at my K2 the encoder A and B lines have ~.5 ms pulses every 1.5 ms > switching +5 to ground. If you rotate the encoder the pulses will go away and > the A or B line goes to +5 dc and then the pulses return as you rotate the > encoder. ++++++++++++++++ ***** Solution ***** Reply-To: From: "Tom Crites" To: Subject: [Elecraft] K2 Alignment and Test, Part 1 Date: Sat, 5 Jan 2002 18:19:49 -0500 Success! I found the short INSIDE J1, between pins 12 and 13. I ended up cutting away the connector between the pins with a dremel tool. The very base the female terminals were touching at the point which appeared to be molded in the plastic! I had to heat the solder joint of pin 12 to pry them apart. I know it's usually operator error when mating connectors, but this was the middle terminal of a 20 way connector. -TAC KC8SES +++++++++++++++