Assembly Instructions - Ramsey Electronics AR2 Instruction Manual

ASSEMBLY INSTRUCTIONS

In ALL PC board assembly steps, our word "INSTALL" means to do this:
•
Insert the part, oriented or "pointed" correctly, into its holes in the PC
board.
•
If helpful, gently BEND the part's wire leads or tabs to hold it into
place, with the body of the part snugly against the top side
("component side") of the circuit board.
•
Solder ALL wires or pins of the part.
•
Trim or "nip" all excess wire lengths extending beyond each solder
connection, taking care that wire trimmings do not become lodged in
solder connections.
Now that you have your parts all sorted and inventoried and your iron is hot
you're ready to start. We'll begin with the ICs so that we can use the board to
seat them flat on the PC board, then we'll move around the board installing
parts in proximity to each other to make the locations easy to find. Check each
step off as you complete it; this will help you to find a problem later if
necessary. Ok, here we go!
First we need to separate the two circuit boards. They're easy enough to snap
apart but once you've done that you should file down the nubs left behind from
separating the boards. You can cut them and then file them if you wish.
We'll begin assembly with the small front panel PC board. Sort the parts for
this board from the rest and we'll place the smaller components first to make it
easier to fit the larger ones in.
1. Install C11, 0.1 µF disc capacitor (marked .1 or 104).
2. Install C8, 0.01 µF disc capacitor (marked .01 or 103 or 10nf).
3. Install R6, 10k ohm trimmer potentiometer (orange top marked 103).
This part will be used to adjust the display contrast.
4. Install R7, 10K ohm resistor (brown-black-orange).
5. Install R8, another 10K ohm resistor (brown-black-orange).
6. Install R5, 10K ohm resistor (brown-black-orange). Seem familiar?
7. Install C10, 1nF disc capacitor (marked .001 or 102). This part must
be mounted on the opposite side of the PC board from where you've been
installing the parts so far. That will make it easier to fit the speaker into the
front panel later.
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