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[K1] Error27 - Alignment and Test Part 1

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Benjamin Schmid-2

[K1] Error27 - Alignment and Test Part 1

Hi everybody,

I'm currently in the middle of building my K1 #3343.
Right until now everything went just fine and it's been fun to build.

I'm at the point of the first power up and wanted to test the ATTN relay.

The LED comes on but there ist no relay clicking.
When hitting BAND I realized that band change wasn't possible and the TRX shows E27.

The filter board is completely plugged in and seated correctly.
Off to the manual then. Have you tried turning it off an on again: yes.
No relay clicking on power up. Until then i thought that was normal.

I checked the orientation of Fil-U1. Its positioned correct and completely in the socket, no bent pins etc..
I checked the voltages of Fil-U1 everything within the specified range.
I checked some voltages at the MCU, not all yet, all within range or as specified in the manual.

I read some older posts abt similar problems. I checked Fil-R1. It's the correct value and the solder joint seems good.
I followed the hole path of the aux bus signal from Fil-U1 Pin13 up to the MCU. Resistance is just the 100ohm of Fil-R1.
I redid some solder connections on the way even though they looked good, as well as all solders on all multi pin connectors.
On the FP-Board FP-RFC1 is the correct value, solder joints looks ok. (It's not a resistor)

Kept reading some older posts and checked the coil resistance of all relays, all about the same resistance (not sure about the actual value right now) , soldering and position of all relays ok.

Right now i redid some voltage measurements.
I found out that the voltage at FIL-U1-16 is somewhat unstable. The first time i measured it was well below 0.3V.
This time it was around 0.6 Volts, a couple seconds later around 1.3 V while Pin 15 is at flat 0.0V as it was before.

Not sure what's that supposed to tell me. Did I fry Z1 while soldering? Or is it U1 itself causing the trouble?

Any ideas are much appreciated!
Thanks in advance and happy holidays.

73 de DG5WJ - Benny

P.S. I sent the same message twice already but somehow they showed up in the liste without any content.
So I switched Mail adresses. Sorry for the spam!

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Don Wilhelm-4

Re: [K1] Error27 - Alignment and Test Part 1

Benny,

Error E27 says that your filter board is not being recognized.
Turn the manual to the Troubleshooting Appendix in the rear , page 2 and
do the checks indicated in the E27 block.
Be certain all pins of the headers to the filter board are well soldered.
If the band board firmware (U1) is plugged in backwards, you will have
low voltage on pin 16 and the regulator will get hot. The notch on U1
must point toward the rear of the board.

73,
Don W3FPR

On 12/23/2014 5:01 AM, Benjamin Schmid wrote:

> Hi everybody,
>
> I'm currently in the middle of building my K1 #3343.
> Right until now everything went just fine and it's been fun to build.
>
> I'm at the point of the first power up and wanted to test the ATTN relay.
>
> The LED comes on but there ist no relay clicking.
> When hitting BAND I realized that band change wasn't possible and the TRX shows E27.
>
> The filter board is completely plugged in and seated correctly.
> Off to the manual then. Have you tried turning it off an on again: yes.
> No relay clicking on power up. Until then i thought that was normal.
>
> I checked the orientation of Fil-U1. Its positioned correct and completely in the socket, no bent pins etc..
> I checked the voltages of Fil-U1 everything within the specified range.
> I checked some voltages at the MCU, not all yet, all within range or as specified in the manual.
>
> I read some older posts abt similar problems. I checked Fil-R1. It's the correct value and the solder joint seems good.
> I followed the hole path of the aux bus signal from Fil-U1 Pin13 up to the MCU. Resistance is just the 100ohm of Fil-R1.
> I redid some solder connections on the way even though they looked good, as well as all solders on all multi pin connectors.
> On the FP-Board FP-RFC1 is the correct value, solder joints looks ok. (It's not a resistor)
>
>
> Kept reading some older posts and checked the coil resistance of all relays, all about the same resistance (not sure about the actual value right now) , soldering and position of all relays ok.
>
>
> Right now i redid some voltage measurements.
> I found out that the voltage at FIL-U1-16 is somewhat unstable. The first time i measured it was well below 0.3V.
> This time it was around 0.6 Volts, a couple seconds later around 1.3 V while Pin 15 is at flat 0.0V as it was before.
>
> Not sure what's that supposed to tell me. Did I fry Z1 while soldering? Or is it U1 itself causing the trouble?
>
>

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Benjamin Schmid-2

Re: [K1] Error27 - Alignment and Test Part 1

Hi Don,

thanks for your help.

I did the troubleshooting steps:
- Turning the K1 off and on again -> no effect. No relays clicking on startup.

- FIL-U1 is installed correct (notch to the rear), no bent pins, checked the soldering of the socket.
The manual states that FIL U1 may be defective. I just wanted to clear out other possibilities before ordering a replacement.

- With power on I checked the voltages at FIL U1 and FP U1 according to the voltages table.
All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 Voltage is unstable between below 0.3V to 1.6V
All MCU voltages are within range except Pin 6. Just measured 1.9V there should be 2.5V

Power consumption is at 66mA with no audio output and the LCD backlight (bright version) installed.

Thanks again for your time.

>> Be certain all pins of the headers to the filter board are well soldered.
>> If the band board firmware (U1) is plugged in backwards, you will have low voltage on pin 16 and the regulator will get hot. The notch on U1 must point toward the rear of the board.

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Help: http://mailman.qth.net/mmfaq.htm
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Don Wilhelm-5

Re: [K1] Error27 - Alignment and Test Part 1

Benny,

The voltage at U1 pin 16 may be OK - that is one of the resonator pins
and can be loaded by your DMM. That is what makes it read as unstable.

For some reason, the K2 MCU is not communicating with the band board
firmware.
Check all the soldering again, and if that does not resolve itself,
obtain a replacement filter board firmware IC *and* obtain a replacement
resonator (Z1) just in case that one is defective.
If you happen to have a spare 4 MHz resonator on hand, try replacing Z1
- that could possibly be the entire problem. You never know until you
try it.

73,
Don W3FPR

On 12/23/2014 12:53 PM, Benjamin Schmid wrote:

> Hi Don,
>
> thanks for your help.
>
> I did the troubleshooting steps:
> - Turning the K1 off and on again -> no effect. No relays clicking on startup.
>
> - FIL-U1 is installed correct (notch to the rear), no bent pins, checked the soldering of the socket.
> The manual states that FIL U1 may be defective. I just wanted to clear out other possibilities before ordering a replacement.
>
> - With power on I checked the voltages at FIL U1 and FP U1 according to the voltages table.
> All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 Voltage is unstable between below 0.3V to 1.6V
> All MCU voltages are within range except Pin 6. Just measured 1.9V there should be 2.5V
>
> Power consumption is at 66mA with no audio output and the LCD backlight (bright version) installed.
>
> Thanks again for your time.
>
>
>>> Be certain all pins of the headers to the filter board are well soldered.
>>> If the band board firmware (U1) is plugged in backwards, you will have low voltage on pin 16 and the regulator will get hot. The notch on U1 must point toward the rear of the board.
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

Richard S. Leary

Re: [K1] Error27 - Alignment and Test Part 1

In reply to this post by Benjamin Schmid-2

Benny,
I just finished my basic K1, Serial Nr 3342, with the first filter board
(20m/15m). I'm amazed at how well it went. No missing parts. Every jack &
plug fits with laser precision. All resistance & voltage measurements fell
right on, or midrange between the manuals listed parameters. I'd go back and
recheck everything. Also make sure the small mini switch (oper/cal) on the
bottom of the RF board is in the "OPER" position. It makes a difference when
checking the U8 pin 1 and pin 8 voltages. All alignment procedures went as
stated in the manual. My VFO range is 80Khz and I ended up taking ONE turn
off of coil L1 to get it down to 3.095Khz. Actual range is 84Khz. Using my
SteppIR DB-18 ant my first contact was with a station in Spokane, WA on
20mtrs. Later my 2nd contact was with a station in New London, CT. An actual
QSO with names, rigs, etc. Lasted 17 minutes. Power = 3W. Now to start the
2nd filter board (17/30 meters).
Thank you Elecraft and Merry Christmas and a Happy New Year to All.

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
Benjamin Schmid
Sent: Tuesday, December 23, 2014 02:02
To: [hidden email]
Subject: [Elecraft] [K1] Error27 - Alignment and Test Part 1

Hi everybody,

I'm currently in the middle of building my K1 #3343.
Right until now everything went just fine and it's been fun to build.

I'm at the point of the first power up and wanted to test the ATTN relay.

The LED comes on but there ist no relay clicking.
When hitting BAND I realized that band change wasn't possible and the TRX
shows E27.

The filter board is completely plugged in and seated correctly.
Off to the manual then. Have you tried turning it off an on again: yes.
No relay clicking on power up. Until then i thought that was normal.

I checked the orientation of Fil-U1. Its positioned correct and completely
in the socket, no bent pins etc..
I checked the voltages of Fil-U1 everything within the specified range.
I checked some voltages at the MCU, not all yet, all within range or as
specified in the manual.

I read some older posts abt similar problems. I checked Fil-R1. It's the
correct value and the solder joint seems good.
I followed the hole path of the aux bus signal from Fil-U1 Pin13 up to the
MCU. Resistance is just the 100ohm of Fil-R1.
I redid some solder connections on the way even though they looked good, as
well as all solders on all multi pin connectors.
On the FP-Board FP-RFC1 is the correct value, solder joints looks ok. (It's
not a resistor)

Kept reading some older posts and checked the coil resistance of all relays,
all about the same resistance (not sure about the actual value right now) ,
soldering and position of all relays ok.

Right now i redid some voltage measurements.
I found out that the voltage at FIL-U1-16 is somewhat unstable. The first
time i measured it was well below 0.3V.
This time it was around 0.6 Volts, a couple seconds later around 1.3 V while
Pin 15 is at flat 0.0V as it was before.

Not sure what's that supposed to tell me. Did I fry Z1 while soldering? Or
is it U1 itself causing the trouble?

Any ideas are much appreciated!
Thanks in advance and happy holidays.

73 de DG5WJ - Benny

P.S. I sent the same message twice already but somehow they showed up in the
liste without any content.
So I switched Mail adresses. Sorry for the spam!

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html Message
delivered to [hidden email]

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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Benjamin Schmid-2

Re: [K1] Error27 - Alignment and Test Part 1

In reply to this post by Don Wilhelm-5

Hi Don,

Replacing the resonator had no effect.
I ordered a new Filter Board IC which I received today.

Now everything works as supposed to and I was able to finalize alignment and Test Part 1.
Now I am off building again.

Thanks for your help!

73 de DG5WJ - Benny
————————————————————————

Mail: [hidden email]

> Am 23.12.2014 um 21:54 schrieb Don Wilhelm <[hidden email]>:
>
> Benny,
>
> The voltage at U1 pin 16 may be OK - that is one of the resonator pins and can be loaded by your DMM. That is what makes it read as unstable.
>
> For some reason, the K2 MCU is not communicating with the band board firmware.
> Check all the soldering again, and if that does not resolve itself, obtain a replacement filter board firmware IC *and* obtain a replacement resonator (Z1) just in case that one is defective.
> If you happen to have a spare 4 MHz resonator on hand, try replacing Z1 - that could possibly be the entire problem. You never know until you try it.
>
> 73,
> Don W3FPR
>
>> On 12/23/2014 12:53 PM, Benjamin Schmid wrote:
>> Hi Don,
>>
>> thanks for your help.
>>
>> I did the troubleshooting steps:
>> - Turning the K1 off and on again -> no effect. No relays clicking on startup.
>>
>> - FIL-U1 is installed correct (notch to the rear), no bent pins, checked the soldering of the socket.
>> The manual states that FIL U1 may be defective. I just wanted to clear out other possibilities before ordering a replacement.
>>
>> - With power on I checked the voltages at FIL U1 and FP U1 according to the voltages table.
>> All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 Voltage is unstable between below 0.3V to 1.6V
>> All MCU voltages are within range except Pin 6. Just measured 1.9V there should be 2.5V
>>
>> Power consumption is at 66mA with no audio output and the LCD backlight (bright version) installed.
>>
>> Thanks again for your time.
>>
>>
>>>> Be certain all pins of the headers to the filter board are well soldered.
>>>> If the band board firmware (U1) is plugged in backwards, you will have low voltage on pin 16 and the regulator will get hot. The notch on U1 must point toward the rear of the board.
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>

Don Wilhelm-5

Re: [K1] Error27 - Alignment and Test Part 1

Benny,

It is good to know that it is finally working for you.

73,
Don W3FPR

On 1/16/2015 11:43 AM, Benjamin Schmid wrote:

> Hi Don,
>
> Replacing the resonator had no effect.
> I ordered a new Filter Board IC which I received today.
>
> Now everything works as supposed to and I was able to finalize alignment and Test Part 1.
> Now I am off building again.
>
> Thanks for your help!
>
> 73 de DG5WJ - Benny
> ————————————————————————
>
>
> Mail: [hidden email]
>
>
>> Am 23.12.2014 um 21:54 schrieb Don Wilhelm <[hidden email]>:
>>
>> Benny,
>>
>> The voltage at U1 pin 16 may be OK - that is one of the resonator pins and can be loaded by your DMM. That is what makes it read as unstable.
>>
>> For some reason, the K2 MCU is not communicating with the band board firmware.
>> Check all the soldering again, and if that does not resolve itself, obtain a replacement filter board firmware IC *and* obtain a replacement resonator (Z1) just in case that one is defective.
>> If you happen to have a spare 4 MHz resonator on hand, try replacing Z1 - that could possibly be the entire problem. You never know until you try it.
>>
>> 73,
>> Don W3FPR
>>
>>> On 12/23/2014 12:53 PM, Benjamin Schmid wrote:
>>> Hi Don,
>>>
>>> thanks for your help.
>>>
>>> I did the troubleshooting steps:
>>> - Turning the K1 off and on again -> no effect. No relays clicking on startup.
>>>
>>> - FIL-U1 is installed correct (notch to the rear), no bent pins, checked the soldering of the socket.
>>> The manual states that FIL U1 may be defective. I just wanted to clear out other possibilities before ordering a replacement.
>>>
>>> - With power on I checked the voltages at FIL U1 and FP U1 according to the voltages table.
>>> All Fil U1 voltages except 16 are within range. As stated before U1 pin 16 Voltage is unstable between below 0.3V to 1.6V
>>> All MCU voltages are within range except Pin 6. Just measured 1.9V there should be 2.5V
>>>
>>> Power consumption is at 66mA with no audio output and the LCD backlight (bright version) installed.
>>>
>>> Thanks again for your time.
>>>
>>>
>>>>> Be certain all pins of the headers to the filter board are well soldered.
>>>>> If the band board firmware (U1) is plugged in backwards, you will have low voltage on pin 16 and the regulator will get hot. The notch on U1 must point toward the rear of the board.
>>> ______________________________________________________________
>>> 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
>>> Message delivered to [hidden email]
> ______________________________________________________________
> 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
> Message delivered to [hidden email]