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#5956 problem

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Matthew D. Pitts

#5956 problem

Gentlemen,

I'm at the first alignment stage and I've run into a problem. I was able
to get the INFO 201 message upon first power-up, but I haven't gotten
anything to display other than ELE on subsequent power-ups. Also, I have
to look at the display at an angle to see that. Any ideas on what to
look for? I can't proceed with the K2 itself until I finish these tests.
I guess it's time to build the KIO2, KSB2 and K160RX so they're ready to
install when I get the rest of it done.
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Don Wilhelm-3

RE: #5956 problem

Check the soldering very carefully - especially the pins of the LCD display
and the pins of the socket (which are unfortunately under the LCD now) -
check especially pin 1 of the socket, many times that pin does not get
soldered.

If you do find unsoldered or poorly soldered socket pins, you can cut away a
bit of the plastic on the side of the socket and get a soldering iron tip on
the pin to reheat it and feed more solder.
If you suspect the LCD pins, they can be soldered from the top side of the
board which often provides a better connection since it is difficult to
properly heat the pins with no projection from the bottom of the board.

73,
Don W3FPR

> -----Original Message-----
>
> I'm at the first alignment stage and I've run into a problem. I was able
> to get the INFO 201 message upon first power-up, but I haven't gotten
> anything to display other than ELE on subsequent power-ups. Also, I have
> to look at the display at an angle to see that. Any ideas on what to
> look for? I can't proceed with the K2 itself until I finish these tests.
> I guess it's time to build the KIO2, KSB2 and K160RX so they're ready to
> install when I get the rest of it done.
> 2/10/2007 9:15 PM
>

--
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9:15 PM

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dave.wilburn

Re: #5956 problem

In reply to this post by Matthew D. Pitts

Check your display installation and the display driver (the big chip on
the back) installation. Make sure there were no bent pins when you
pushed that thing in. I know I was sweating bullets during that. I
assume all your other resistance checks on that chip were fine? Did you
check them on the pin of the chip, or on the associated pin on the back
of the board?

David Wilburn
[hidden email]

Matthew D. Pitts wrote:

> Gentlemen,
>
> I'm at the first alignment stage and I've run into a problem. I was able
> to get the INFO 201 message upon first power-up, but I haven't gotten
> anything to display other than ELE on subsequent power-ups. Also, I have
> to look at the display at an angle to see that. Any ideas on what to
> look for? I can't proceed with the K2 itself until I finish these tests.
> I guess it's time to build the KIO2, KSB2 and K160RX so they're ready to
> install when I get the rest of it done.
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> 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
>

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Matthew D. Pitts

Re: #5956 problem - solved

In reply to this post by Don Wilhelm-3

Don,

Cold solder joints galore; it's working now, though the display still
isn't viewable from head-on. Doesn't make a whole lot of sense, but I
can work with it and go on to the next step.

Don Wilhelm wrote:

> Check the soldering very carefully - especially the pins of the LCD display
> and the pins of the socket (which are unfortunately under the LCD now) -
> check especially pin 1 of the socket, many times that pin does not get
> soldered.
>
> If you do find unsoldered or poorly soldered socket pins, you can cut away a
> bit of the plastic on the side of the socket and get a soldering iron tip on
> the pin to reheat it and feed more solder.
> If you suspect the LCD pins, they can be soldered from the top side of the
> board which often provides a better connection since it is difficult to
> properly heat the pins with no projection from the bottom of the board.
>
> 73,
> Don W3FPR
>

Bob Nielsen

Re: #5956 problem - solved

By any chance did you remove the polarizing strip instead of just the
thin protective strip on the LCD module?

I did that and ordered a new one. I dug the old strip out of the
trash, cleaned it off and stuck it back on so I could continue
building--it's still there working just fine.

Bob, N7XY

On Feb 11, 2007, at 7:33 PM, Matthew D. Pitts wrote:

> Don,
>
> Cold solder joints galore; it's working now, though the display
> still isn't viewable from head-on. Doesn't make a whole lot of
> sense, but I can work with it and go on to the next step.
>
> Don Wilhelm wrote:
>> Check the soldering very carefully - especially the pins of the
>> LCD display
>> and the pins of the socket (which are unfortunately under the LCD
>> now) -
>> check especially pin 1 of the socket, many times that pin does not
>> get
>> soldered.
>>
>> If you do find unsoldered or poorly soldered socket pins, you can
>> cut away a
>> bit of the plastic on the side of the socket and get a soldering
>> iron tip on
>> the pin to reheat it and feed more solder.
>> If you suspect the LCD pins, they can be soldered from the top
>> side of the
>> board which often provides a better connection since it is
>> difficult to
>> properly heat the pins with no projection from the bottom of the
>> board.
>>
>> 73,
>> Don W3FPR
>>
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> Elecraft web page: http://www.elecraft.com
>

Matthew D. Pitts

Re: #5956 problem - solved

Bob,

Unless the polarizing strip is flexible as well as the protective strip,
I'd have to say no. Any other ideas in regards to my viewing problem? I
could try cutting away at the IC socket and resoldering the pins from
the back to see if that helps any.

Bob Nielsen wrote:
> By any chance did you remove the polarizing strip instead of just the
> thin protective strip on the LCD module?
>
> I did that and ordered a new one. I dug the old strip out of the
> trash, cleaned it off and stuck it back on so I could continue
> building--it's still there working just fine.
>
> Bob, N7XY
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