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When properly installed, none of the three ribbon cables should be twisted and all should line up nicely
with their mating headers
(10) Plug one end of a six inch 26-conductor ribbon cable into P207 on the
microcontroller circuit board, and the other end into P307 on the front panel circuit board.
The ribbon cable should point from P207 toward the front of the controller circuit board,
and from P307 toward the bottom of the front panel circuit board. The cable should not
twist. Check the alignment of the connectors at both headers. At this stage of the
assembly, two ribbon cables should be installed fully, and the third ribbon cable (from
P103) should be hanging free.
(11) Following the steps below, prepare and install a short 4-conductor cable to connect
from P102 on the main circuit board to P302 on the front panel circuit board.
(a) Cut four 6 inch lengths of 22 AWG stranded hookup wire, and
strip each end about 3/16 inch. If available, it will be convenient to
use different color wires.
(b) As shown above, identify two 4-pin Molex 0.156” nylon
connector housings (Mouser p/n 538-09-50-3041) and eight crimp
terminals (Mouser p/n 538-08-50-0134). Using needle-nose pliers,
crimp a terminal onto each end of the hookup wires prepared in the
previous step.
(Hint: it’s a good idea also to solder the wires to the
terminals. Use the smallest amount of solder necessary for a good
connection.)
