PMFoundations Clock Divider, Инструкция по сборке, Страница: 9 / 12

Page 9 of 12
Place the panel over the jacks and pots and position the LED in the holes.
Place the short lead into the pad with the flatted edge of the silk screen next to it. Solder and
clip the leads.
13. If you do not trust all your soldering and connections, carry out the voltage tests below before
installing the remaining ICs
Voltage tests
1. You do not have to do these tests if you are completely happy with your soldering and are sure
there are no bridges or incorrectly placed components. However, these tests will ensure that
the correct power supplies are sent to the IC pins to ensure they will not be damaged on power
up.
2. Plug in the power supply and connect the – VE probe of a multimeter (set to the 20V DC range)
to one of the GROUND pins of the jacks. The GROUND pin is nearest to the edge of the board.
3. Check the voltage at the following points on the board:
a. At IC1 pin 14 approx = +12V
b. At IC1 pin 7= 0V
c. At IC2 pin 7 approx = +12V
d. At IC2 pin 2 approx = +2V
e. At IC2 pin 3= 0V
f. At IC3 pin 14 approx = +12V