[Elecraft] Ser 4993 - First Problem

[G3VVT at aol.com]

In a message dated 30/06/05 03:24:07 GMT Daylight Time, nz8j at woh.rr.com  
writes:

----  Applied power for the first time:
---- heard the relays engage
----  backlight came on
---- Display is  blank, nothing whatsoever in the display
---- turned rig off and back on, no relays this time, but  still
nothing in the display



Reply:--------------------------------------------------
 
Tim,
The item you should check is that you have soldered pin 1 on the K2 Front  
Panel LCD driver U1.
 
I did miss this when I built my K2 as did a number of others. Not sure why  
this happens. Pin 1 of all IC on the PCBs are different being a circular  
copper track, though that is no answer why it is missed in  the soldering.
 
The pin 1 on front panel U1 can be inspected with the board removed.  However 
due to the front panel switches and the LCD display positioned above it  is 
rather difficult to get a soldering iron in to solder the pad.
 
Some builders have removed the LCD to access the pad. As I had concerns in  
damaging the LCD in the removal, ended up cutting a tiny "V" out of the  
plastic corner on the lower edge of the IC socket, just enough to get a  very small 
soldering iron bit to the pad there and solder the pin. The  IC socket plastic 
removal is not seen as it is hidden when  assembled.
 
Bob, G3VVT
K2 #4168