Ramsey Electronics ICI2 Instruction Manual - page 10
ICI2 Page 10
ICI2 PC BOARD ASSEMBLY STEPS
Assembly of the ICI2 is pretty simple, but it requires some time and some
patience. We will start with the side that has the power jack, and we will move
from there using the power jack as a reference.
1. Install J3, the 2.1mm power jack. Be sure to get a good, solid
connection to all three pads as this will have to take some mechanical
strain during normal use. Use ample solder.
2. Install RCA Jacks J1, J2, J5, and J9 in a little row at the bottom of the
board. These are the line in/line out jacks. Use plenty of solder for these
too, especially on the ground leads, as these make the jack mechanically
strong.
3. Install C13, a 10 uF electrolytic capacitor. Watch the polarity. One lead
should be longer than the other and the longer lead is the positive. The
negative lead is marked with a stripe or band down one side of the part.
Be sure that the “-” band doesn’t go into the “+” hole!
4. Install C11, 10 uF electrolytic capacitor. Watch the polarity again.
5. Install C15, 10 uF electrolytic capacitor. Watch the polarity.
6. Install C7, 10 uF electrolytic capacitor. Watch polarity.
7. Install C5, 10 uF electrolytic capacitor. Uh.. watch polarity.
8. Install C16, 0.1 uF ceramic disk capacitor.
9. Install U5, LMC6482AIN op amp, above C7. Make sure it goes in the
right way. The notch on the IC should line up with the notch on the board
drawing. By changing the gain of this amp, the output levels are adjusted
up and down.
10. Install R10, 10K ohm resistor [brown-black-orange], next to U5.
11. Install R14, 10K ohm resistor [brown-black-orange], above C15.
12. Install R13, 10K ohm resistor [brown-black-orange], above R14.
13. Install R4, 10K ohm resistor [brown-black-orange], above R14.
14. Install C10, 10 uF electrolytic capacitor, next to C10.
15. Install U1, MCP42010 dual 10K ohm potentiometer. Make sure it goes
in the right way. This chip acts as the gain potentiometers for U5. When it
s value changes, the gain of U5 changes, which in turn adjusts the gain.
16. Install C1, 0.1 uF ceramic capacitor, above C10.
17. Install R5, 10K ohm resistor [brown-black-orange], above C1.