[K3] KRX3 installed and ERR VCO / ERR PL1
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[K3] KRX3 installed and ERR VCO / ERR PL1
 
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Hi,
I completed the installation of my KRX3 this evening (and upgraded the DSP board on my main RX, too). When I first turned the unit on, I received ERR PL1. This cleared out, then I tried to calibrate the synthesizers. First, I tried the SUB. It went through its procedure and then returned E 00005 ERR VCO. I did the same thing with the main synthesizer, and received the same result. I did have to add the 27 ohm resistor (tested the resistance afterwards, and it was as expected--around 27 ohms instead of 100 ohms). I also added the jumper wire for automatic front-end protection. I do have an older K3 (S/N 110), so perhaps that's to blame...? Any help would be greatly appreciated! -john W4PAH Madison, WI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: [K3] KRX3 installed and ERR VCO / ERR PL1
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Even though it's quite embarrassing, I wanted to let folks know about
the resolution of this issue. It's also great to have my problem and solution live in perpetuity on the list in case someone else has this issue arise when they are adding their KRX3. To recap, the issue I had was that neither my main nor my aux KSYN3 would complete the calibration procedure if there was a KSYN3 installed in the aux slot. If there was just a KSYN3 installed in the main slot, everything was hunky dory. I tried adding DeoxIT to the slots where the main and aux KSYN3 are installed. That made it easier to remove/replace the units, but didn't help the main problem at all. I checked the voltage at J1 and J2 of the KREF3 board, and they were both within range (a little over .9V). I double-checked to make sure that all the TMP cables were in place, and that all the plug-in modules were aligned correctly. *Finally*, I checked the bottom of the board one last time, especially the work I had recently completed (a couple of upgrades and adding a resistor to change the value at R91). My error was in the resistor didn't have a good soldering joint at the point where the leaded add-on 27 ohm resistor was added and where the 100 ohm SMT resistor was previously. I reflowed solder there, and then voila, the rig will complete the calibration procedure for both KSYN3 modules! When I was checking the resistance before, I think I was inadvertently pushing the leaded resistor against the SMT resistor, thus making a connection (albeit temporary) and showing the expected value of 27 ohms. D'oh! Thanks again to Gary and everyone on the list for their assistance. I'm looking forward to playing around a bit with the newly upgraded K3 this weekend. 73 -john W4PAH Madison, WI On Wed, Sep 5, 2012 at 11:35 PM, John Shadle <[hidden email]> wrote: > Hi, > I completed the installation of my KRX3 this evening (and upgraded the > DSP board on my main RX, too). > > When I first turned the unit on, I received ERR PL1. This cleared out, > then I tried to calibrate the synthesizers. First, I tried the SUB. It > went through its procedure and then returned E 00005 ERR VCO. I did > the same thing with the main synthesizer, and received the same > result. > > I did have to add the 27 ohm resistor (tested the resistance > afterwards, and it was as expected--around 27 ohms instead of 100 > ohms). I also added the jumper wire for automatic front-end > protection. > > I do have an older K3 (S/N 110), so perhaps that's to blame...? > > Any help would be greatly appreciated! > > -john W4PAH > Madison, WI Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
K3 Low Power Amp problems… Fixed by me and David!
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I was trying to do a 5 watt cal but only got 3.5 watts and got an error code...
It was working but now no go. I called Elecraft and talked to David. After some easy on phone tests... He said to re bias the the driver(Q2) for and the two output devises (Q4 and Q5). I did that with the help of a simple procedure Dave sent me... And what do you know... Q4 would not bias. The pot related to Q4 had zero effect. I called David and he said he suspected a bad output transistor. Today the 3 transistors in question arrived in the mail. So using my brand new Hako Solder sucker Model# 808, removed all of the solder around the pins of Q2, Q4 and Q5. With the solder removed the parts fell out onto the bench! No desolder ribbon, no prying, no pulling, no cutting...just heat the pin/pad, pull the trigger the pump sucks it dry! And I do mean DRY. I checked the 3 transistors with the handy dandy M3 transistor checker... Q4 was a dead short.... David of Elecraft... THANK YOU... P.S. UPS will be at my door with a Brand new KX3 on tuesday...To bad I have jury duty on tuesday. So, all is right with my world in Santa Fe, New Mexico. Phil KF5ROJ Elecraft... Elegant service! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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