[Elecraft] K2 - No Display troubleshooting

[Philippe]

Hi Kevin,

I solved my problem with the precious help of Gary from Elecrat and Bob,
G3VVT  who had a similar problem and we sloved it the same way :-)

I forgot to solder pin 1 on U1. The best way should be to desolder the 6
front LCD pins, move the LCD gently to the back and desolder the 4 LCD
backlight pins.

I was afraid to break something so I decided to cut the corner of U1
support to have access to Pin 1. Then I soldered it from the upper side.

And it works since yesterday night where I did the firts tests that are
all Ok.

I'm going on Part II now :-)


Thanks everyone for your help,

Best 73,
Philippe
f8bxi


Le mar 29/06/2004 à 12:14, Kevin B. G. Luxford a écrit :
> Phillipe,
> 
> I had a similar problem, and found that I had removed the polarizing filter
> from the LCD thinking that it was protective film!  The hint to this is that
> when you switch on and look very carefully, you will see very faint
> characters on the LCD module.
> 
> A sadder budweiser Aussie!
> 
> Vy 73
> Kevin
> VK3DAP / ZL2DAP
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of G3VVT at aol.com
> Sent: Monday, June 28, 2004 12:51 PM
> To: f8bxi at teaser.fr; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K2 - No Display troubleshooting
> 
> 
> Philippe,
>  
> Check that you have soldered all the pins for the socket of U1, the  LCD  
> driver on the Front Panel Board. I missed soldering pin #1 on this and  the 
> result was no display also.
>  
> A real problem to cure that mistake!
>  
> Another item to check could be the LCD display itself. Mine was too short
> in 
> the device pins so had to solder on the top side (front) of the board as  
> noted in the K2 manual. There is a chance that the LCD display soldering
> will be  
> ineffective if soldered on the underside.
>  
> No doubt other suggestions will come your way on what to check.
>  
> Regards,
> Bob, G3VVT
> K2 #4168
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