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Insert the 1A fuse into the fuse clips before soldering them to the circuit board.
(9) Install the two 26-pin (2x13) male headers at P101 and P103. Solder two end pins
first on each header to make certain the body of the header is flat against the circuit
board. Then solder the remaining pins. Clean off the flux with alcohol and then check the
solder joints with a magnifying glass to make sure there are no solder bridges between
pins.
26 pin male headers install at P101 and P103.
(10) Install the six connectors J107-J112 along the rear edge of the circuit board. (See
photo, below.) Make absolutely certain the connectors are seated flat against the board
before soldering the pins; otherwise, they won’t fit properly into their rear panel cutouts.
As before, inspect each solder joint with a magnifying glass to look for cold solder joints
and solder bridges. Some of the connectors have metal mounting tabs, and these should
be soldered to the ground plane on the circuit board.
Hint: It takes extra heat to solder
pins and tabs to the ground plane of the circuit board. Be sure to use a large enough
soldering iron and make certain that solder has flowed onto the ground plane.
From left to right, J108, J109, J110, J112, J111, J107
(11) Clean the flux from the circuit board with isopropyl alcohol and Q-tips and then
inspect each solder joint using a magnifying glass. Look especially closely at the multipin
connectors along the rear edge of the circuit board and the two 26-pin headers.
(12) With a pair of wire cutters, cut out 1/8” notches at each rear corner of the circuit
board. Note that the outline of the notches is silkscreened on the board. These notches
allow the circuit board to clear the side brackets on the enclosure.
