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Figure 24-showing socket orientation 
It’s best to hold the socket in place by bending over two corner pins in a direction that 
won’t encourage shorts to adjacent traces. If that makes you uncomfortable, you can: 
1.  tack-solder two corner pins 
2.  Make sure that socket lies flush. 
3.  If the socket isn’t flush, then melt one or the other of the tack soldered corner pins 
to get the socket flush to the board. 
4.  Finish soldering the balance of the 20 pin socket pins. 
Components to be installed later 
C7, C8, and C13 will be installed in a later step (along with C2), after you’ve installed all 
the components on the other side of the controlled PCB. 
Locations that remain unpopulated 
No component is installed in the P9 location. 
You’ve Finished this Side of the Controller PCB for Now 
Most of the remainder of the components will be installed on what has until now been the 
solder side of the board. We will return to this side of the board later to install the last few 
components. 
Install the Push Buttons 
Now it’s time to flip the PCB over, and install the components that install from the other 
side. You’ll be installing components into the side of the board whose silk screen is 
shown in Figure 25. 
 
Orient the pushbuttons correctly by matching the flat side of the push button to the flat 
side of the silk screen. Make sure that each button sits flat against the PCB.