Ramsey Electronics MR6 - Manual (Page 10)

MR6
• 10
Now, let's get building!
First, we’ll install the “normal” parts that mount on the “component “ side of
the circuit board with their leads passing through to the “solder” side of the
board. This will also help us to get acquainted with the up - down, left - right
orientation of the circuit board. Remember that the chip components will be
mounted on the solder side of the circuit board so only use the amount of
solder necessary to make the connection, being careful not to “flood” the
circuit board traces with solder.
ˆ 1. Sort your surface mount components by type to make it easier when
installing. The parts are in marked bags that are easily identifiable. The
markings on the individual parts will be explained when the part is
installed.
ˆ 2. Install crystal Y1, marked 12, 16 or 24.
ˆ 3. Install the black plastic battery holder. Note the polarity markings on
the holder and install correctly.
Now you’ll begin soldering the surface mount components to the solder side
of the circuit board. If there is any question as to how they should be
installed, review the surface mount soldering instructions. For correct
positioning, consult the component layout diagram.
ˆ 4. Install C1, 10 uF electrolytic capacitor, orient the marked ‘+’ side as
shown.
ˆ 5. Install C2, .001 uF chip capacitor.
ˆ 6. Install L2, .10 uH chip inductor. If you look very closely, you’ll see that
it is marked either R10 or 101K in very tiny letters! Inside of that little
body is a very small coil of wire.
ˆ 7. Install L1, .15 uH chip inductor, marked 151K in little, tiny letters.
ˆ 8. Install C9, 5 pF chip capacitor.
ˆ 9. Install C8, 5 pF chip capacitor.
ˆ 10. Install R9, 100K ohm chip resistor.
ˆ 11. Install C11, another 5 pF chip capacitor.
ˆ 12. Install Q4, the MMBTH10L NPN surface mount transistor (marked
3E). Be sure to orient it as shown in the parts placement diagram.
Those sure are small mounting “tabs”, aren't they!
ˆ 13. Install C7, the last 5 pF chip capacitor.