First locate the 100uF capacitor. It will be marked 100uF and may have a voltage rating of 25V or more. As long as the voltage is above 25 volts and capacitance is 100uF you’re good to go. € 38. Install C3, a 100uF capacitor, marked 100uF. Watch the orientation. Next comes the 10uF capacitor. Again the 10uF is important and the voltage should be above 25 volts. Watch the orientation. € 39. Install C4, a 10uF capacitor, marked 100uF. Watch the orientation. € 40. Install pushbutton switch S1 by inserting all six leads through the circuit board. The switch should fit flat to the circuit board before soldering. € 41. Install S2 the same way. € 42. Install LED D9.
The flat side is oriented as shown in the diagram. Leave it standing about 1/2 of an inch off of the board when soldering. After soldering bend it over to a 90є angle at its midpoint so that it faces the outside of the board. Observe the following diagrams for proper orientation. LED Leave leads approximately 1/2 inch in length LED Leave leads approximately 1/2 inch in length PC Board PC Board Front View Front View after Bending € 43. Install LED D4 the same way as D9. € 44. Install X1, the 3.579 MHz crystal (silver can marked 3.579). Make sure it is flush to the board before soldering. € 45. Install J6, the modular RJ-11 phone jack.
Pay close attention to the silkscreen and line up the four conductor wires with their respective holes before snapping the part onto the board. Solder all four wire connections being careful not to short them together (they’re really close to each other). Do not solder the plastic posts. The snap fit design will hold it in place. € 46. Insert U1, the micro-controller marked with a sticker labeled DCI2rxx into the socket. Orient the notched end as shown on the PC board silkscreen and Parts Layout Diagram (toward the relays). Before you push it down into the socket, check to be sure none of the pins are bent under or outside of the socket.
When you’re sure the pins are where they belong, press the chip down so that it is seated flat within the socket. DCI2 14 Flat Flat