Elecraft T1 Assembly Manual - Manual (Page 13)

13
Inspect the 28-pin, low-profile socket for U1. Note that:
__ Each pin has a shoulder. When installed, all of the shoulders must be in contact with the PC board. You
will not be able to assemble your finished tuner if this socket is not mounted against the PC board.
__ The pins are hollow. The pins on controller U1 fit inside the pins on the socket. Do not cut, bend or alter
the pins in any way or you may not be able to install U1.
__ There is a notch at one end of the black plastic frame of the socket. This notch must be aligned with the
marks on the PC board when you install the socket.
Align the socket with the outline for U1 on the top side of the PC board near the opposite end of the
board from J1 and J2. Make sure that each pin is in its corresponding solder pad, and the solder pads
reserved for P1 and P2 are open (See Figure 6). Verify that the notched end of the socket is pointing toward
the holes for connector P1 as indicated by the outline printed on the board.
NOTCHED END
OF SOCKET
BE CERTAIN PADS FOR P1 AND P2 ARE CLEAR
Figure 6. Installing Socket for U1.
Gently press the socket down onto the board until the shoulder of each pin is touching the top of the
board. Do not solder yet. You will be instructed to do so in a later step.
Once soldered, the socket for U1 will be impossible to remove from the board without destroying it.
Before soldering, check to be certain it is positioned correctly as follows:
__ Locate the two 6-pin male connectors, P1 and P2.
__ Place the short pins of the connectors in spaces provided for P1 and P2. Figure 2 shows these
connectors in place on the finished PCB. Confirm that the socket for U1 is properly positioned so that
connectors P1 and P2 can be installed later.
__ Remove the 6-pin male connectors from P1 and P2 and set them aside. Don’t disturb the 28-pin socket.
On the 28-pin socket, solder one pin, then inspect the socket carefully to ensure that the shoulders of
the pins are against the top of the board. If needed, reheat the pin while pressing the down on the socket.
When you are satisfied that the socket is seated against the top of the board, solder all 28 pins.