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8. Install C42, a 0.1uF ceramic capacitor (marked 104).
PS. POWER SUPPLY CIRCUIT
1. Install R29, the last 2.2K ohm resistor (marked Red, Red, Red).
2. Install C28, a 10uF electrolytic capacitor (marked 10uF). That's right,
watch the polarity. You are getting good at this.
3. Install J5, the 2.1mm power jack. Make sure it is flush and square to
the board before soldering.
4. Install S1, a DPST power switch. Just like with the jacks, make sure
this part is flush and square to the circuit board before soldering.
5. Install VR1, a 7810 +10 volt regulator. This part is polarity sensitive so
it must go into the board in a certain way. Take a close look at VR1's
pattern on the layout diagram or the circuit board's silk screen. It is made
up of two rectangles. The smaller rectangle represents the metal tab on
the actual regulator. Install VR1 so the metal tab faces C28.
6. Install C40, the last 0.1uF ceramic capacitor (marked 104).
7. Install C39, a 10uF electrolytic capacitor (marked 10uF). Polarity!
8. Install C29, finally the last 10uF electrolytic capacitor (marked 10uF).
9. Install VR2, a 7805 +5 volt regulator. VR2 is like VR1 every way
except output voltage. Install VR2 so the metal tab faces C45.
A. AMPLIFIER CIRCUIT
Most of the parts in the amplifier circuit are surface mount or SMT. Since
some of these parts are almost impossible to install by hand they have been
installed for you.
1. Install H3 a 2 pin header. Solder one pin first, make sure the header is
flush and square to the board before soldering the other pin.
2. Install H4 a 3 pin header. Solder one pin first, make sure the header is
flush and square to the board before soldering the last two pins
3. Install H5 the last 3 pin header. Install this part just like H4.
4. Install T1 a 4 position spring loaded terminal block. This part must be
flush and square to the board before soldering.
5. Install C1, a 1000uF electrolytic capacitor. Remember to watch
polarity!
UAM4SYS • 20
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