Ramsey Electronics FM30, Руководство пользователя

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FM30
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the back of the base tray so that the buttons can protrude through the
front panel you just attached. There are slots on either side of the base
tray for the board to slide into. Once you have the main board slid into
position (as far forward as it will comfortably go . . . see why you trimmed
those breakaway tabs in that early step?) you can position the front panel
board so that the buttons protrude nicely and everything is lined up.
F20. When things are right where you want them take your soldering iron
and tack one of the end pins on the connector that joins the two PC
boards, either J1 or J4. Check placement again and then tack solder a pin
on the other connector.
F21. Pull the connected boards out of the case and finish soldering the J4/
J5, J1/J2 connections, being careful to solder them all and not to bridge
any. These are both the physical and electrical connections from the main
to the front panel PC boards so make sure you have solid, reliable solder
joints
F22. With the boards soldered together and the main board in the correct
position, place D4, the small green LED, into the front panel, but do not
solder. The part has a flat side and so does the silkscreen for the part, but
it’s a little hard to see so you can also check placement by the longer
lead. This longer lead is the positive side and should be placed in the hole
opposite the flat side on the drawing, the side closest to R6. Then slide
the circuit board assembly forward in the case bottom (until you can’t push
it forward any further) with the buttons properly protruding through the
front panel. Now align the unsoldered D4 so that its yellow lens fits into
the hole in the front panel. It is finally time to solder this little bugger in
place. When you’re done, nip off the excess lead length on the back of
the board just as you did with all the other parts.
That’s about it! Give the board one last good checkout before we apply power
in the next section. You don’t want to find out too late that an electrolytic ca-
pacitor, diode, or IC was installed backwards, or that you have a damaging
solder bridge somewhere. Use the Parts Layout Diagram to help you deter-
mine which connections are correct and which are suspect if you have any
doubts at all. Ok, let’s fire this baby up and see what it will do!
FM30 SETUP:
It’s time to set up and test your FM30, then get on the air. You’ll need the
case, power supply, whip antenna, a small screwdriver or diddle stick, and a
line level audio source such as a CD player or computer sound card. Here we
go!