Re: [Elecraft] K2 Assembly problems/Info 080 Message
Tom, I suggest we get the resistance readings straight before applying power. Were the resistance readings made with the boards separated? They should have been. First check Control Board U3 pin 8 (with the board removed). Is 1.009 mean 1.009k or 1.009M? If your DMM is autoranging, you will have to look at the range that was selected to tell the difference. 1k is not good, but 1M is just fine. The symbol means greater than and any reading above the listed value is just fine. If the resistance there is 1k, then look carefully for solder bridges. You may have to wick away any excess solder. Solder just sufficient to fill the thru-plated holes is enough. If your solder connections have a convex appearance, that can hide a poorly soldered joint. A small concave solder fillet is OK. All the resistances on the RF board appear to be OK *if* the range for those readings is kohms. On the front panel, J1 pins 10, 12, 15, 16, 17, 18, and 19 should be resolved before proceeding with anything else. Did you have the control pots all set to mid-range before taking the readings. If the RF gain is not set to mid-range, that can explain the low resistance reading, otherwise, begin looking for solder bridges. I am suspicious of the resistance readings on pins 10, 12, 16, and17. Those are digital signals and you would have no display at all if pin 12 is really grounded. Front panel J1 pin 18 is the 5 volt supply to the front panel board - again, if that resistance is really 25 ohms, you would be drawing a lot of current on the front panel and nothing is likely to work. Please recheck those resistances and please specify the units - ohms, kohms or Mohms. We can get to the U1 (and Info 080) problem and the last character of the display after the resistances have been resolved. With that many erroneous resistance readings. either there is a problem with your DMM or you have many solder bridges to resolve. I suggest we take this troubleshooting off reflector. It is getting too long and most builders will not be interested in the specifics of th troubleshooting steps. 73, Don W3FPR On 3/4/2013 11:14 PM, Tom Fuller wrote: Don, 'could not get a reading' means my multimeter showed 0.L (or infinity), I switched to a large 13.8 volt power supply-now screen reads 13.5v .04 amps...I did some re-soldering again today and now most of the digits on the display light up completely except for the digit above the XIT on plastic display , now my u1 on rf board is not heating up anymore, but there is no 6 volts on it, but the solder connections are good, here are the readings you asked for, __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Don, 'could not get a reading' means my multimeter showed 0.L (or infinity), I switched to a large 13.8 volt power supply-now screen reads 13.5v .04 amps...I did some re-soldering again today and now most of the digits on the display light up completely except for the digit above the XIT on plastic display , now my u1 on rf board is not heating up anymore, but there is no 6 volts on it, but the solder connections are good, here are the readings you asked for, page 22 resistance checks: test point/should read/I read on multimeter (0.L=infinity) p2,pin1, 10k, 0.L u5 out (5v pin), 2k, 13.89 u4 out (8v pin), 3-7k, 4.40 q1 collector, 1m, 4.39 q2 collector, 1m, 4.39 u3, pin 8, 10k, 1.000 u6, pin 13, 100k, 0.L u6, pin 14,100k, 0.L u6, pin 29, 70-90k, 95.8 u6, pin 30, 70-90k, 95.8 u8, pin 2, 100k, 0.L u8, pin 15, 100k, 0.L u8, pin 16, 100k, 0.L page 29 resistance checks: test point/should read/I read on multimeter (0.L=infinity) u1, pin 1, 25-35k, 29.2 u1, pin 2, 25-35k, 29.2 u1, pin 3, 40-60k, 47.8 u1, pin 4, 50k, 0L u1, pin 5, 15-40k, 24.6 u1, pins 6-11, 0, all read 0 u1, pin 12, 9-11k, 9.9 u1, pin 13-40, 50k, all read 0.L j1, pin 1, 1M, 0.L j1, pin 2, 1M, 0.L j1, pin 3, 1M, 0.L j1, pin 4, 1M, 0.L j1, pin 5, 1M, 0.L j1, pin 6, 50k, 0.L j1, pin 7, 1M, 0.L j1, pin 8, 0, 0 j1, pin 9, 50k, 0.L j1, pin 10, 50k 1.009 j1, pin 11, 50k, 0.L j1, pin 12,50k, .000 j1, pin 13, 50k, 0.L j1, pin 14, 50k, 0.L j1, pin 15, 10-60k, .033 j1, pin 16, 25-35k, .029 j1, pin 17, 25-35k, .029 j1, pin 18, 15-40k, .025 j1, pin 19, 1.5-3.5k, .005 j1, pin 20, 0, 0 page 38 resistance checks: test point/should read/I read on multimeter (0.L=infinity) r115, right end, 500ohms, 4.41 u1, pin 1, 500 ohms, 4.41 u1, pin 4, 20k, 0.L u1, pin 9, 20k, 0.L u1, pin 10, 20k, 0.L u1, pin 28, 20k, 0.L r1 (end near r2), 1M, 0.L r2 (end near r1), 1M, 0.L 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609p7570783.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Hello Don, on power up I am still getting Info 080 message and garbled frequency display (and no relays are clicking), alot of the menu functions show up correctly though, I checked the following as you indicated: RF Board U1 is oriented correctly and no pins are bent, jumper is set for INT on P7,pin 1 is soldered correctly on Front Panel U1, and my soldering is done correctly so far everywhere after re-checking all of it, I did some resistance checks on the control board, could not get a reading on the following: p2 pin 1, u3 pins: 8,13,14, u8 pins: 2,15,16 (got readings on the rest of the control panel test point checks)...for resistance checks on the front panel board I could not get a reading on the following: u1 pins 4, 13-40, j1 pins: 1-7, 9-11, 13-14 (got readings on the rest of front panel test points); for RF board resistance checks I could not get readings on the following: u1 pins: 4,9,10,28, R1 and R2, (got readings from rest of rf board test points) thanks for your suggestions, anything else I should try at this time? thanks and 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609p7570690.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Tom, Did you remove the Front Panel board and the Control Board before making those resistance measurements. Those resistances are for the board alone after its assembly. When plugged into the RF board, the measurements can be different. Does U1 still get hot? 73, Don W3FPR On 3/3/2013 7:32 PM, Tom Fuller wrote: Hello Don, on power up I am still getting Info 080 message and garbled frequency display (and no relays are clicking), alot of the menu functions show up correctly though, I checked the following as you indicated: RF Board U1 is oriented correctly and no pins are bent, jumper is set for INT on P7,pin 1 is soldered correctly on Front Panel U1, and my soldering is done correctly so far everywhere after re-checking all of it, I did some resistance checks on the control board, could not get a reading on the following: p2 pin 1, u3 pins: 8,13,14, u8 pins: 2,15,16 (got readings on the rest of the control panel test point checks)...for resistance checks on the front panel board I could not get a reading on the following: u1 pins 4, 13-40, j1 pins: 1-7, 9-11, 13-14 (got readings on the rest of front panel test points); for RF board resistance checks I could not get readings on the following: u1 pins: 4,9,10,28, R1 and R2, (got readings from rest of rf board test points) thanks for your suggestions, anything else I should try at this time? thanks and 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609p7570690.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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 __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Tom, Please explain the could not get a reading - does that mean your DMM reads zero ohms or infinity? Infinity is the same as you see when the probes are connected to nothing. 73, Don W3FPR On 3/3/2013 7:32 PM, Tom Fuller wrote: Hello Don, on power up I am still getting Info 080 message and garbled frequency display (and no relays are clicking), alot of the menu functions show up correctly though, I checked the following as you indicated: RF Board U1 is oriented correctly and no pins are bent, jumper is set for INT on P7,pin 1 is soldered correctly on Front Panel U1, and my soldering is done correctly so far everywhere after re-checking all of it, I did some resistance checks on the control board, could not get a reading on the following: p2 pin 1, u3 pins: 8,13,14, u8 pins: 2,15,16 (got readings on the rest of the control panel test point checks)...for resistance checks on the front panel board I could not get a reading on the following: u1 pins 4, 13-40, j1 pins: 1-7, 9-11, 13-14 (got readings on the rest of front panel test points); for RF board resistance checks I could not get readings on the following: u1 pins: 4,9,10,28, R1 and R2, (got readings from rest of rf board test points) thanks for your suggestions, anything else I should try at this time? thanks and 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609p7570690.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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 __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Hello Don, yes I figured I had to have the boards separated so I did that with the power off, yes U1 is still getting hot, I looked over the solder connections and all appear to be good, a few days back I did get a scroll though of all the bands with relays clicking with band switch buttons working ok but the info 080 message has been there all the time. Now all I get is no relay clicking, info 080 message all the time and no band switching and frequency display continues to be garbledI saw you and others had a lengthy discussion of info 080 problem at this url: http://elecraft.365791.n2.nabble.com/Info-080-message-started-with-RF-Alignment-and-Test-Part-II-td7564545.html#none don't know if Marcus (AC8HU) finally got it resolved (no notes on this email list if he got it resolved? Also, Bob , N1QQP, also had the same problem with info 080 msg. and I didn't see anything in this email list indicating he got it resolved either? see url: http://elecraft.365791.n2.nabble.com/K2-Assembly-problem-td463441.html 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609p7570697.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Tom, In those instances, the details of the debugging were likely taken off-list. I cannot recall those exactly, but I believe they were resolved. When doing off-list debugging, I leave it up to the indivudual to report back to the list with the resolution. Some do and some do not. If reported to the list, it was likely in a new thread. I am concerned about the heating of U1, and that is what you should tackle first. Check the voltage at U1 pins 1 and 20. They should be close to 6 volts. Also check the soldering at the U1 socket to be certain you do not have a solder bridge. 73, Don W3FPR On 3/3/2013 9:31 PM, Tom Fuller wrote: Hello Don, yes I figured I had to have the boards separated so I did that with the power off, yes U1 is still getting hot, I looked over the solder connections and all appear to be good, a few days back I did get a scroll though of all the bands with relays clicking with band switch buttons working ok but the info 080 message has been there all the time. Now all I get is no relay clicking, info 080 message all the time and no band switching and frequency display continues to be garbledI saw you and others had a lengthy discussion of info 080 problem at this url: http://elecraft.365791.n2.nabble.com/Info-080-message-started-with-RF-Alignment-and-Test-Part-II-td7564545.html#none don't know if Marcus (AC8HU) finally got it resolved (no notes on this email list if he got it resolved? Also, Bob , N1QQP, also had the same problem with info 080 msg. and I didn't see anything in this email list indicating he got it resolved either? see url: http://elecraft.365791.n2.nabble.com/K2-Assembly-problem-td463441.html 73, __ 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
Re: [Elecraft] K2 Assembly problems/Info 080 Message
Tom, RF Board U1 should not get hot. Make sure it is oriented correctly. The notch goes toward the left side panel. If you plugged it in backwards, cross your fingers that it is still OK. Error 080 is an indication that the main microprocessor cannot communicate with other microprocessors in the system over the single line AUXBUS signal. In the bare K2 there are 2 microprocessors - Control Board U6 is the main one and RF board U1 is the other. For the LO BATT message, make certain you have the jumper on the 3 pin header at the top of the Control Board plugged for INT (to the left as you look down on it). As for the garbled display, first get rid of the INFO 080 messages, and then tackle that one. Peer under the LCD display to see if pin 1 of Front Panel U1 was soldered. If it was not, cut away a bit of the lower part on socket corner to expose the pin and solder it from the top. With all those problems, I am wondering about the quality of your soldering. Compare your solder connections with the diagrams in the soldering tutorial that you can download from the Elecraft website. You need enough heat on both the component leads and the solder pads to make the solder flow out to an almost invisible edge. Any solder fillet should be concave. If it is convex, either too much solder was applied or the solder did not flow adequately into the thru-plated hole. 73, Don W3FPR On 3/2/2013 1:15 AM, Tom Fuller wrote: Hello, I am assembling my Elecraft K2 Radio (serial # 7421) , I made it up to page 43 of the manual, earlier today I was able to get the info 201 to show on display as on page 43 and frequencies showed ok/bands changed on display ok also but with info 080 message shown , the tuning dial did not seem to be working too well...In order to troubleshoot it, I began to re-solder all the connections but now the frequencies don't display anymore-just some garbled numbers show and also I am still getting an error 080 message/low battery message and I noticed the part U1 on the RF board is hot to touch. I have gone thru the troubleshooting steps but don't want to go past page 44 steps because I want to get the frequency display to work again and removed the info 080 message before I move on... does anyone have any additional troubleshooting steps? thanks and 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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 __ 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
[Elecraft] K2 Assembly problems/Info 080 Message
Hello, I am assembling my Elecraft K2 Radio (serial # 7421) , I made it up to page 43 of the manual, earlier today I was able to get the info 201 to show on display as on page 43 and frequencies showed ok/bands changed on display ok also but with info 080 message shown , the tuning dial did not seem to be working too well...In order to troubleshoot it, I began to re-solder all the connections but now the frequencies don't display anymore-just some garbled numbers show and also I am still getting an error 080 message/low battery message and I noticed the part U1 on the RF board is hot to touch. I have gone thru the troubleshooting steps but don't want to go past page 44 steps because I want to get the frequency display to work again and removed the info 080 message before I move on... does anyone have any additional troubleshooting steps? thanks and 73, KE4QCM Tom Fuller -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Assembly-problems-Info-080-Message-tp7570609.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
[Elecraft] K2 Assembly Problems
Hello, I posted this a few days ago. I will cut and paste here again. I'm in the middle of building a K2, S/N 6412. While doing the Alignment and test Part 1, I had a couple of readings that were not in specs. 1. Page 48, Setting the AGC Threshold, the manuals calls for adjusting R-1 for a reading of 3.80VDC on pin 5 of U2. The highest R1 would adjust to is 3.60VDC. 2. Page 48 Bargraph Current test. The manual calls for a current reading of 0.16 to 0.18. My K2 reads 0.25 amps. That is quite a bit higher than what is called for. I received suggestions to check the voltage on the 8 volt regulator in the control board. It is just as suggested, the voltage is almost 1/2 volt low. Will a 7808 work? Is it the same as a LM2930T-8? They both have the same NTE cross reference and are available locally. I finally got around to reassemble for alignment part II. Some times, when it turns on, nothing happens, no display on the LCD, none of the controls do anything. After I turn it off and on a couple of times, it starts working as it is suppose to. This also happened in the first section for alignment where I had the problems listed above, I thought it was the memory initializing. This is not the case, it is still doing the same thing. Would the low 8 Volts cause the MCU to hang up? Thank you for your help. Best, DW Holtman WB7SSN ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 Assembly Problems
DW, First, the 7808 will work, but the stock regulator is a low dropout type, so if you replace it with a 7808, the power supply voltage that will create proper operation will have to be a bit higher. That may make no difference if you are operating from a home station power supply, but if you are operating from a battery, the battery low voltage that will cause improper operation will be higher than with the low dropout regulator. I suggest requesting a replacement regulator from Elecraft - [EMAIL PROTECTED] The low 8 volt supply voltage will not cause an MCU failure - you have a different problem there. Check the component values and check the soldering. When you are finished, check the soldering. 73, Don W3FPR DW Holtman wrote: Hello, I posted this a few days ago. I will cut and paste here again. I'm in the middle of building a K2, S/N 6412. While doing the Alignment and test Part 1, I had a couple of readings that were not in specs. 1. Page 48, Setting the AGC Threshold, the manuals calls for adjusting R-1 for a reading of 3.80VDC on pin 5 of U2. The highest R1 would adjust to is 3.60VDC. 2. Page 48 Bargraph Current test. The manual calls for a current reading of 0.16 to 0.18. My K2 reads 0.25 amps. That is quite a bit higher than what is called for. I received suggestions to check the voltage on the 8 volt regulator in the control board. It is just as suggested, the voltage is almost 1/2 volt low. Will a 7808 work? Is it the same as a LM2930T-8? They both have the same NTE cross reference and are available locally. I finally got around to reassemble for alignment part II. Some times, when it turns on, nothing happens, no display on the LCD, none of the controls do anything. After I turn it off and on a couple of times, it starts working as it is suppose to. This also happened in the first section for alignment where I had the problems listed above, I thought it was the memory initializing. This is not the case, it is still doing the same thing. Would the low 8 Volts cause the MCU to hang up? Thank you for your help. Best, DW Holtman WB7SSN ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
