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from the backside of the display board through the 3/8" hole. The tab on
the potentiometer must be removed. Attach the mounting hardware
securely.
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77. Here's the tricky part of assembly - mounting the display board to the
main board. The most important part of this step is achieving a nice right
angle between the display board and the main board.
Align the main board with the display board and notice how the pads on
each board line up with each other. To assist with assembly, as well as
provide mechanical stiffness, solder a piece of scrap wire supplied with the
kit between jumper point JMP-A on the main board and the display board.
Be sure that the PC boards are seated at right angles. Do the same for JMP-
B.
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78. You can now use the wires to hold the boards at exact 90 degree
angles. When the PC boards are lined up, carefully begin to solder each
pad joining with a small amount of solder. The solder will flow nicely
between the two PC board pads. After you have soldered one or two
joints, check again to make sure the boards are square. If all checks OK,
continue on to the rest of the solder pads, checking for solder bridges as
you go. The more area that is connected with solder, the stronger your
board will be. Just be careful not to make any solder bridges or wrong
connections.
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79. Now we're ready to perform the final wiring of your kit. Locate the
wire supplied with your kit and cut the following:
White: 3 pieces, 7, 4, 3½ inches long
Red: 3 pieces, 7, 5½, 2 inches long
Black: 3 pieces, 7, 5, 2½ inches long
Strip the ends of each wire back about
them with some fresh solder.
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80. Connect the 2½" piece of black wire as a jumper between the holes
labeled "A" on the main board and solder in place.
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81. Connect the 3½" piece of white (or other color) wire between the
holes labeled "C" on the main board and solder in place. This is another
jumper.
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82. Connect the 4" piece of white (or other color) wire between the holes
labeled "B" on the main board and solder in place. This is another
jumper, a long one in this case!
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83. Connect the 7" piece of red wire from the pad on the back (or solder
side) of the display board labeled MIC2 to the hole on the main board
¼
" tightly twist the ends and tin
CB-1 • 14
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