Ramsey Electronics CW-700, Руководство пользователя

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CW700
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ˆ 22. Install D12, a 1N4148 glass bead diode. Don't forget to check the
polarity!
ˆ 23. Install D6, D11, D7, D9 and D8. all 1N4148 glass bead diodes.
Make sure that the bands are pointing in the right direction. When you
are done, they will all be facing the same way. These diodes help the
computer decide exactly which button is being pushed.
Now, we’ll install almost all of the components on the front board.
ˆ 24. On the front board, install R4, a 1K ohm resistor [brown-black-red].
ˆ 25. One at a time, install all five switches flush with the front board. (S1,
S2, S3, S4, S5) Proper mounting is important if you want your kit to look
great.
ˆ 26. Identify R6, a 100K potentiometer. It will be small, orange, and
marked 104. Mount it in its place in the front panel circuit board and
solder it. This is the sensitivity control for the switches.
ˆ 27. Identify LED1, the three color LED. When looking at the LED from
the top you will notice that it has a small flat spot near one leg. You will
also notice that on the same side as the flat side, there is a shorter leg.
Identify either of these. The flat side will be facing down when mounted.
Another way to look at it is that the flat spot will face the programing
switch (S5).
ˆ 28. Insert R22, a 470 ohm resistor [yellow-violet-brown]. This resistor
limits the current to the LED to a safe level.
ˆ 29. Identify the sixteen pin socket in your kit (not the chip). (SOC2)
Note the marking cut into one end of the socket. When properly
inserted, this marking must face towards the battery side of the board.
This socket has been included so that the chip is protected from
excessive soldering heat, and can be taken out easily. Solder the socket
to the board.
ˆ 30. In order to get the most desirable speed range out of your keyer,
some careful thought must be given to installing C14 and C19. See the
chart to choose the correct values.
ˆ 31. Install the capacitor(s) chosen above. C14 is a 200pF disc capacitor
marked 200 or 201. C19 is a 680pF disc capacitor marked 680 or 681.
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32. Next, install the eight pin socket (SOC1) into your board where U3 is
to be mounted. There is a marking on one end. Line this up with the
silhouette on the board, just like it were a chip.