Re: [Elecraft] Kx1 Z1 Encoder testing
Burke, Yes, you can test the encoder and its circuit to the microprocessor with a DMM. Measure the voltage from the encoder pins as you slowly rotate the encoder shaft. The outer two pins in the row of 3 are the ones to measure. As you rotate the shaft, the voltage should jump between zero volts and something close to 5 volts. If it does not go to zero, there is a problem with the encoder. If the voltage does not go up to the vicinity of 5 volts, look carefully at RP3 and U1 pins 3 and 4. If that does not reveal a problem, I can give you some resistance checks to make too. 73, Don W3FPR Burke Jones wrote: > I am almost done with my KX1. During each test section I have noticed > that there seems to be a problem. Sometimes turning Z1 changes the > frequency display but sometimes when you turn it the last 2 digits on > the display just go back and fourth - like from 1 to 2 then 1 then 2. > > I have triple checked the solder connections at Z1. > > I am trying to figure out if I might have a faulty Z1 encoder. Can > anyone tell me how I could use my DMM to test directly at the "leads" > of the Z1? If so which leads and what should I look for? > > Thanks for all your help!! > > Burke Jones > N0HYD > Http://www.n0hyd.com > > Sent from my iPhone > __ > 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 > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 > 06:54:00 > > __ 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] Kx1 Z1 Encoder testing
Okay. Here is what happens. I was lucky when I turned it on to check it was having problems because it sometimes works right. The display showed .8 and 0 volts. I would turn it and it would go to 4.89 volts and the display would change to .9 and the voltage would stay at 4.89 until I turned it a bit. Then the display would change to .8 and the voltage would be 0. It would just repeat this over and over everytime I turned z1 a bit. Then it started working and the voltage would be 0 until I turned it and it would go up into the 5 volt range and then back to 0 when I stopped turning it. Does that seem to indicate a z1 that is faulty sometimes? Burke Jones Sent from my iPhone On Mar 14, 2009, at 7:37 PM, Don Wilhelm wrote: > Burke, > > Yes, you can test the encoder and its circuit to the microprocessor > with a DMM. > Measure the voltage from the encoder pins as you slowly rotate the > encoder shaft. The outer two pins in the row of 3 are the ones to > measure. As you rotate the shaft, the voltage should jump between > zero volts and something close to 5 volts. If it does not go to > zero, there is a problem with the encoder. > If the voltage does not go up to the vicinity of 5 volts, look > carefully at RP3 and U1 pins 3 and 4. > > If that does not reveal a problem, I can give you some resistance > checks to make too. > > 73, > Don W3FPR > > Burke Jones wrote: >> I am almost done with my KX1. During each test section I have >> noticed that there seems to be a problem. Sometimes turning Z1 >> changes the frequency display but sometimes when you turn it the >> last 2 digits on the display just go back and fourth - like from 1 >> to 2 then 1 then 2. >> >> I have triple checked the solder connections at Z1. >> >> I am trying to figure out if I might have a faulty Z1 encoder. Can >> anyone tell me how I could use my DMM to test directly at the >> "leads" of the Z1? If so which leads and what should I look for? >> >> Thanks for all your help!! >> >> Burke Jones >> N0HYD >> Http://www.n0hyd.com >> >> Sent from my iPhone >> __ >> 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 >> --- >> - >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: >> 270.11.13/2001 >> - Release Date: 03/14/09 06:54:00 >> >> __ 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] Kx1 Z1 Encoder testing
Another thing I meant to tell you in the las email. Unrelated to z1. I did the resistance checks on page 54. All checks out good except for Q4 Collector. I am getting 9.63k instead of >10k. Is this a problem? If so where should I look. Burke Jones Sent from my iPhone On Mar 14, 2009, at 7:37 PM, Don Wilhelm wrote: > Burke, > > Yes, you can test the encoder and its circuit to the microprocessor > with a DMM. > Measure the voltage from the encoder pins as you slowly rotate the > encoder shaft. The outer two pins in the row of 3 are the ones to > measure. As you rotate the shaft, the voltage should jump between > zero volts and something close to 5 volts. If it does not go to > zero, there is a problem with the encoder. > If the voltage does not go up to the vicinity of 5 volts, look > carefully at RP3 and U1 pins 3 and 4. > > If that does not reveal a problem, I can give you some resistance > checks to make too. > > 73, > Don W3FPR > > Burke Jones wrote: >> I am almost done with my KX1. During each test section I have >> noticed that there seems to be a problem. Sometimes turning Z1 >> changes the frequency display but sometimes when you turn it the >> last 2 digits on the display just go back and fourth - like from 1 >> to 2 then 1 then 2. >> >> I have triple checked the solder connections at Z1. >> >> I am trying to figure out if I might have a faulty Z1 encoder. Can >> anyone tell me how I could use my DMM to test directly at the >> "leads" of the Z1? If so which leads and what should I look for? >> >> Thanks for all your help!! >> >> Burke Jones >> N0HYD >> Http://www.n0hyd.com >> >> Sent from my iPhone >> __ >> 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 >> --- >> - >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: >> 270.11.13/2001 >> - Release Date: 03/14/09 06:54:00 >> >> __ 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] Kx1 Z1 Encoder testing
Burke, If Q4 collector is the only point that is less than 10k, that is a mystery - it should connect directly to the base of Q5 and only to Q5 base - (and therefore have the same resistance reading). Check again and make certain both readings are the same. The 9.63k ohms *may* be OK, but you should have the same reading at Q4 collector as you have at Q5 base. 73, Don W3FPR Burke Jones wrote: > Another thing I meant to tell you in the las email. Unrelated to z1. > > I did the resistance checks on page 54. All checks out good except for > Q4 Collector. I am getting 9.63k instead of >10k. Is this a problem? > If so where should I look. > > Burke Jones > Sent from my iPhone > > On Mar 14, 2009, at 7:37 PM, Don Wilhelm wrote: > > >> Burke, >> >> Yes, you can test the encoder and its circuit to the microprocessor >> with a DMM. >> Measure the voltage from the encoder pins as you slowly rotate the >> encoder shaft. The outer two pins in the row of 3 are the ones to >> measure. As you rotate the shaft, the voltage should jump between >> zero volts and something close to 5 volts. If it does not go to >> zero, there is a problem with the encoder. >> If the voltage does not go up to the vicinity of 5 volts, look >> carefully at RP3 and U1 pins 3 and 4. >> >> If that does not reveal a problem, I can give you some resistance >> checks to make too. >> >> 73, >> Don W3FPR >> >> Burke Jones wrote: >> >>> I am almost done with my KX1. During each test section I have >>> noticed that there seems to be a problem. Sometimes turning Z1 >>> changes the frequency display but sometimes when you turn it the >>> last 2 digits on the display just go back and fourth - like from 1 >>> to 2 then 1 then 2. >>> >>> I have triple checked the solder connections at Z1. >>> >>> I am trying to figure out if I might have a faulty Z1 encoder. Can >>> anyone tell me how I could use my DMM to test directly at the >>> "leads" of the Z1? If so which leads and what should I look for? >>> >>> Thanks for all your help!! >>> >>> Burke Jones >>> N0HYD >>> Http://www.n0hyd.com >>> >>> Sent from my iPhone >>> __ >>> 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 >>> --- >>> - >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: >>> 270.11.13/2001 >>> - Release Date: 03/14/09 06:54:00 >>> >>> >>> > __ > 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 > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 > 06:54:00 > > __ 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] Kx1 Z1 Encoder testing
Burke, That indicates that Z1 has a high resistance connection - it could be inside Z1 (faulty Z1) or it could be in your soldering. Check (and re-flow) the soldering at U1 pins 3 and 4, RP3 pins 3, 4, 5, 6, 7, 8, 9 and 10 and pins 1, 2 and 3 of Z1. If that does not fix it, blame Z1. 73, Don W3FPR Burke Jones wrote: > Okay. Here is what happens. I was lucky when I turned it on to check > it was having problems because it sometimes works right. > > The display showed .8 and 0 volts. I would turn it and it would go to > 4.89 volts and the display would change to .9 and the voltage would > stay at 4.89 until I turned it a bit. Then the display would change > to .8 and the voltage would be 0. > > It would just repeat this over and over everytime I turned z1 a bit. > > Then it started working and the voltage would be 0 until I turned it > and it would go up into the 5 volt range and then back to 0 when I > stopped turning it. > > Does that seem to indicate a z1 that is faulty sometimes? > > Burke Jones > Sent from my iPhone > > On Mar 14, 2009, at 7:37 PM, Don Wilhelm wrote: > > >> Burke, >> >> Yes, you can test the encoder and its circuit to the microprocessor >> with a DMM. >> Measure the voltage from the encoder pins as you slowly rotate the >> encoder shaft. The outer two pins in the row of 3 are the ones to >> measure. As you rotate the shaft, the voltage should jump between >> zero volts and something close to 5 volts. If it does not go to >> zero, there is a problem with the encoder. >> If the voltage does not go up to the vicinity of 5 volts, look >> carefully at RP3 and U1 pins 3 and 4. >> >> If that does not reveal a problem, I can give you some resistance >> checks to make too. >> >> 73, >> Don W3FPR >> >> Burke Jones wrote: >> >>> I am almost done with my KX1. During each test section I have >>> noticed that there seems to be a problem. Sometimes turning Z1 >>> changes the frequency display but sometimes when you turn it the >>> last 2 digits on the display just go back and fourth - like from 1 >>> to 2 then 1 then 2. >>> >>> I have triple checked the solder connections at Z1. >>> >>> I am trying to figure out if I might have a faulty Z1 encoder. Can >>> anyone tell me how I could use my DMM to test directly at the >>> "leads" of the Z1? If so which leads and what should I look for? >>> >>> Thanks for all your help!! >>> >>> Burke Jones >>> N0HYD >>> Http://www.n0hyd.com >>> >>> Sent from my iPhone >>> __ >>> 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 >>> --- >>> - >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: >>> 270.11.13/2001 >>> - Release Date: 03/14/09 06:54:00 >>> >>> >>> > __ > 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 > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 > 06:54:00 > > __ 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] Kx1 Z1 Encoder testing
Don, I get the same reading at the q4 collector as I do on q5 base - exactly the same. I guess I will proceed but make a note to future reference if needed. Burke On 3/15/09, Don Wilhelm wrote: > Burke, > > If Q4 collector is the only point that is less than 10k, that is a > mystery - it should connect directly to the base of Q5 and only to Q5 > base - (and therefore have the same resistance reading). Check again > and make certain both readings are the same. > > The 9.63k ohms *may* be OK, but you should have the same reading at Q4 > collector as you have at Q5 base. > > 73, > Don W3FPR > > Burke Jones wrote: >> Another thing I meant to tell you in the las email. Unrelated to z1. >> >> I did the resistance checks on page 54. All checks out good except for >> Q4 Collector. I am getting 9.63k instead of >10k. Is this a problem? >> If so where should I look. >> >> Burke Jones >> Sent from my iPhone >> >> On Mar 14, 2009, at 7:37 PM, Don Wilhelm wrote: >> >> >>> Burke, >>> >>> Yes, you can test the encoder and its circuit to the microprocessor >>> with a DMM. >>> Measure the voltage from the encoder pins as you slowly rotate the >>> encoder shaft. The outer two pins in the row of 3 are the ones to >>> measure. As you rotate the shaft, the voltage should jump between >>> zero volts and something close to 5 volts. If it does not go to >>> zero, there is a problem with the encoder. >>> If the voltage does not go up to the vicinity of 5 volts, look >>> carefully at RP3 and U1 pins 3 and 4. >>> >>> If that does not reveal a problem, I can give you some resistance >>> checks to make too. >>> >>> 73, >>> Don W3FPR >>> >>> Burke Jones wrote: >>> I am almost done with my KX1. During each test section I have noticed that there seems to be a problem. Sometimes turning Z1 changes the frequency display but sometimes when you turn it the last 2 digits on the display just go back and fourth - like from 1 to 2 then 1 then 2. I have triple checked the solder connections at Z1. I am trying to figure out if I might have a faulty Z1 encoder. Can anyone tell me how I could use my DMM to test directly at the "leads" of the Z1? If so which leads and what should I look for? Thanks for all your help!! Burke Jones N0HYD Http://www.n0hyd.com Sent from my iPhone __ 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 --- - No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 06:54:00 >> __ >> 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 >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 8.0.237 / Virus Database: 270.11.13/2001 - Release Date: 03/14/09 >> 06:54:00 >> >> > __ 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
