Step 5
Solder IC sockets. Match the IC sockets indent (marking pin 1 side) with the silk screens.
If you feel the least uncertain on the IC direction, please search the web for IC orientation.
U2, U3
14 pin DIP sockets (DIP-14) IC's will be mounted later. 2pcs
U4
16 pin DIP socket (DIP-16) 1pcs
Step 6
Solder electrolytic capacitors. Electrolytic capacitors are sensitive to mounting direction. Put
the long pin in the hole marked with a + (anode) on the silkscreen.
The opposite side - (cathode) is marked with fully filled silkscreen.
C13, C14
10µF 2pcs
Step 7
Solder transistors, transistors are sensitive to mounting direction. Match the curved side on the
transistor with the curved side in the silkscreen.
Q1, Q2
BC557B 2pcs
