Dear all, this is an important point, because I became a little bit sweaty after installing the LCD, when I realized, that I don't have access to U1 anymore.
In the manual there should be a big warning: "Check soldering of U1" before installing the LCD itself. Regards Martin -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von [EMAIL PROTECTED] Gesendet: Thursday, June 30, 2005 1:00 PM An: [EMAIL PROTECTED]; elecraft@mailman.qth.net Betreff: Re: [Elecraft] Ser 4993 - First Problem In a message dated 30/06/05 03:24:07 GMT Daylight Time, [EMAIL PROTECTED] 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 _______________________________________________ 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
