[Elecraft] K2 Info 090 at first test
My Christmas gift (OK, I opened it early) says Info 090 when powered up. According to the manual this is EEPROM Test #1 failed. At power up, relays click for a short period, and the display says INFO 090. The front panel buttons make the display change to many wonderful and cryptic things that I'll figure out later, the tuning knob makes things change, so I think the display board is working On the control board the regulated +5V is in good shape. The 4 MHz clock on U6 makes 5v Peak to Peak on pin 14 and is easily adjustable above and below 4 MHz. Pins 1, 2, and 3 of U7 (EEPROM) have short bursts of 5V P-P data at power up and then rest at +5V, supply and ground pins on U7 all have expected voltages. The D to A converter, U8 seems to be working, it generates a 5V P-P tone signal on pin 4 shortly after power up. Pin 1 rises to +5 volts shortly after power up. I think the controller, U6 is working, and the EEPROM is bad. Is my analysis way off here? I'd hate to do something rash, like rip out a good part to prove I'm an idiot, or make things worse fixing things that aren't broke. Thanks and 73 Greg WB7RSG ___ 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 Info 090 at first test
Greg, Congratulations on your early Christmas gift!!! Sorry it is giving you problems. Before you start ripping things out or suspecting bad components, remember that the design does work (and works very well), and that components rarely fail. The most likely problem is a poor solder joint or an unsoldered joint. As I say many times ' Check the soldering, then recheck the soldering, and when you have finished that, check the soldering.' That will fix the majority of problems. The second most common problem is a misplaced component - so go back over your components with the parts listing in hand and be certain all the components you have placed are correct. Good luck with it - work (and troubleshoot) in an orderly manner and you will locate the source of the problem. Sorry, but I can't pinpoint it from the information you provided thus far. 73, Don W3FPR - Original Message - My Christmas gift (OK, I opened it early) says Info 090 when powered up. According to the manual this is EEPROM Test #1 failed. At power up, relays click for a short period, and the display says INFO 090. The front panel buttons make the display change to many wonderful and cryptic things that I'll figure out later, the tuning knob makes things change, so I think the display board is working On the control board the regulated +5V is in good shape. The 4 MHz clock on U6 makes 5v Peak to Peak on pin 14 and is easily adjustable above and below 4 MHz. Pins 1, 2, and 3 of U7 (EEPROM) have short bursts of 5V P-P data at power up and then rest at +5V, supply and ground pins on U7 all have expected voltages. The D to A converter, U8 seems to be working, it generates a 5V P-P tone signal on pin 4 shortly after power up. Pin 1 rises to +5 volts shortly after power up. I think the controller, U6 is working, and the EEPROM is bad. Is my analysis way off here? I'd hate to do something rash, like rip out a good part to prove I'm an idiot, or make things worse fixing things that aren't broke. Thanks and 73 Greg WB7RSG ___ 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 Info 090 at first test
Well, knowing Greg and the quality of his workmanship, I'd doubt that bad soldering is the problem. Also, his rf test bench is probably on the same level of, say, Ron's. Searching the web didn't show us much info on Info 090. Too bad it wasn't Info 80. On Sun, 26 Dec 2004, W3FPR - Don Wilhelm wrote: The most likely problem is a poor solder joint or an unsoldered joint. As I say many times ' Check the soldering, then recheck the soldering, and when you have finished that, check the soldering.' That will fix the majority of problems. The second most common problem is a misplaced component - so go back over your components with the parts listing in hand and be certain all the components you have placed are correct. -- My Christmas gift (OK, I opened it early) says Info 090 when powered up. According to the manual this is EEPROM Test #1 failed. -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ 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 Info 090 at first test
I do have to disagree. I consider myself a careful builder and do not often make mistakes, but even so, for myself, the most probable cause of failure with an Elecraft kit is an unsoldered connection, so without remark about the quality of Greg's workmanship, I hold to my statement - 'check soldering'!!! I speak from experience. 73, Don W3FPR - Original Message - Well, knowing Greg and the quality of his workmanship, I'd doubt that bad soldering is the problem. Also, his rf test bench is probably on the same level of, say, Ron's. Searching the web didn't show us much info on Info 090. Too bad it wasn't Info 80. On Sun, 26 Dec 2004, W3FPR - Don Wilhelm wrote: The most likely problem is a poor solder joint or an unsoldered joint. As I say many times ' Check the soldering, then recheck the soldering, and when you have finished that, check the soldering.' That will fix the majority of problems. The second most common problem is a misplaced component - so go back over your components with the parts listing in hand and be certain all the components you have placed are correct. -- My Christmas gift (OK, I opened it early) says Info 090 when powered up. According to the manual this is EEPROM Test #1 failed. -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ 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 Info 090 at first test
You're right, most of the failures I've had with projects have been from misplaced parts or poor solder, but I usually spot them before sniveling for help. In this case, I spent a couple hours looking at it for part placement errors, and looked at every solder joint under my stereo microscope (Every blind old fart should have one!). Most of the projects I work on are surface mount, but I'm reasonably sure I haven't forgotten how to solder through hole components. I've haven't built anything with serial interface EEPROMs before, it's possible I'm misunderstanding what it wants. I'm seeing bursts of legal 5 volt logic signals on pins 1, 2, 3, 5, and 6 at power up. Solid +5V on 3, 7, and 8 and ground on pin 4. I think the processor is trying to talk to the EEPROM's pin 5 SDI (serial data in, I think), but it's not answering correctly from pin 2 SDO (serial data out?). The processor seems to be talking to the D to A converter since it successfully generates a tone signal at power up, so I think it's alive. I think a bad solder connection would show up as an intermittent or missing signal. The signals around the EEPROM look pretty solid to my old 475 scope. It looks like the processor uses the same line to send serial data to both the EEPROM and the DAC, and has a separate chip select line for each. If the processor is healthy enough to control the DAC, It should be able to control the EEPROM. I think the EEPROM is sick. of course, I've been wrong before, this may be only more proof of my idiocy. If all else fails, I'll haul it into work and look at the timing around the EEPROM with a digital storage scope, and figure out who is talking to who when. Now that I've been away from it a few hours, maybe I'll spot something I missed. Has any one else chased a INFO 090 trouble? 73 GREG WB7RSG On Sun, 2004-12-26 at 22:58 -0500, W3FPR - Don Wilhelm wrote: I do have to disagree. I consider myself a careful builder and do not often make mistakes, but even so, for myself, the most probable cause of failure with an Elecraft kit is an unsoldered connection, so without remark about the quality of Greg's workmanship, I hold to my statement - 'check soldering'!!! I speak from experience. 73, Don W3FPR - Original Message - Well, knowing Greg and the quality of his workmanship, I'd doubt that bad soldering is the problem. Also, his rf test bench is probably on the same level of, say, Ron's. Searching the web didn't show us much info on Info 090. Too bad it wasn't Info 80. On Sun, 26 Dec 2004, W3FPR - Don Wilhelm wrote: The most likely problem is a poor solder joint or an unsoldered joint. As I say many times ' Check the soldering, then recheck the soldering, and when you have finished that, check the soldering.' That will fix the majority of problems. The second most common problem is a misplaced component - so go back over your components with the parts listing in hand and be certain all the components you have placed are correct. -- My Christmas gift (OK, I opened it early) says Info 090 when powered up. According to the manual this is EEPROM Test #1 failed. -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ 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
Re: [Elecraft] K2 Info 090 at first test
oops. I spotted the error. in my lust for perfect soldering, I stuck the control board under the microscope I normally use for surface mount work, and carefully installed C45 in the wrong place.. but very neatly, with shiny solder ;-( The field of view under the 'scope is very narrow, the round pin 1 pad under U7 looks just like the one under U8, if all you can see is a few pins I'll go crawl under a rock now 73 Greg. WB7RSG On Sun, 2004-12-26 at 21:51 -0800, Gregory P. Daly wrote: You're right, most of the failures I've had with projects have been from misplaced parts or poor solder, but I usually spot them before sniveling for help. In this case, I spent a couple hours looking at it for part placement errors, . ___ 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 Info 090 at first test
Greg WB7RSG wrote I spotted the error. in my lust for perfect soldering, I stuck the control board under the microscope I normally use for surface mount work, and carefully installed C45 in the wrong place.. but very neatly, with shiny solder ;-( It's absolutely AMAZING how those parts jump into the wrong holes while we're reaching for the soldering iron. I've found that the best way to discourage their wandering is to double check the place at least twice before soldering and once after before going on to the next step. That way only once have I found that the part moved before soldering... And yes it was a 7-pin resistor pack! Did get it out though...but Whew!.. That's a chore for ANY desoldering technique! Ron AC7AC ___ 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
