Ramsey Electronics CW-700, Руководство пользователя

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CW700
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ˆ 72. Install VR1, a 7805 voltage regulator. The 7805 steps down the
voltage on the board so that it is usable by the components. It also
allows for the wide input voltage range of the CW700. The writing on the
part should face the back of the board, metal tab towards front.
ˆ 73. Install C17, a 470 to 1000uF electrolytic capacitor. The capacitor
should be the largest capacitor in the kit. Solder it to the board, making
sure that the polarity is correct.
Now that you have completed the power supply, we will hook up the last
remaining parts.
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74. Insert SP1, the speaker into place on the board. Polarity markings
are found on the underside of the speaker. Solder the connections.
ˆ 75. If they have not been cut already, with a punch, drill or other
method, cut out the two holes where the potentiometers go on the front
panel. There should be enough room to hold the potentiometers easily,
but prevent them from moving excessively.
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76. Here is one of the tricky parts of the kit. We have included two
figures on the next page to help you. Take R10, a 10 K potentiometer,
and remove the nut on the shaft. The shaft will fit through the holes in
the front panel. Push the potentiometer into the hole on the right side
(volume, near R6) of the front panel, from the back. This will be your
volume control knob. Without bending or breaking the tab on the edge
of the potentiometer, it should fit easily into it’s own hole on the board.
When the tab is in the hole, the potentiometer is mounted correctly.
Screw the nut back over the shaft. This will hold the potentiometer firmly
in place.
ˆ 77. Using excess clippings from components, collect eight wires about
an inch long each. Run one wire through each of the five connections
on the potentiometer. Each wire should also be put through the holes in
the board nearest them. Carefully solder each wire to both the board
and the potentiometer. You will notice that the wires actually enter the
board from the bottom. This is perfectly normal. Make sure that they
are not touching each other. See the diagram.
ˆ 78. Mount R25, the other 10K potentiometer in the hole on the left.
Follow the technique in steps 77 and 78 for proper mounting, connecting
wires to only the three center connections.